Shipwright/OTRGui/libs/raylib/src/rshapes.c
M4xw f52a2a6406 git subrepo clone (merge) https://github.com/HarbourMasters/otrgui.git OTRGui
subrepo:
  subdir:   "OTRGui"
  merged:   "a6066a251"
upstream:
  origin:   "https://github.com/HarbourMasters/otrgui.git"
  branch:   "master"
  commit:   "a6066a251"
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2022-03-22 02:53:51 +01:00

1820 lines
71 KiB
C

/**********************************************************************************************
*
* rshapes - Basic functions to draw 2d shapes and check collisions
*
* NOTES:
* Shapes can be draw using 3 types of primitives: LINES, TRIANGLES and QUADS.
* Some functions implement two drawing options: TRIANGLES and QUADS, by default TRIANGLES
* are used but QUADS implementation can be selected with SUPPORT_QUADS_DRAW_MODE define
*
* Some functions define texture coordinates (rlTexCoord2f()) for the shapes and use a
* user-provided texture with SetShapesTexture(), the pourpouse of this implementation
* is allowing to reduce draw calls when combined with a texture-atlas.
*
* By default, raylib sets the default texture and rectangle at InitWindow()[rcore] to one
* white character of default font [rtext], this way, raylib text and shapes can be draw with
* a single draw call and it also allows users to configure it the same way with their own fonts.
*
* CONFIGURATION:
*
* #define SUPPORT_MODULE_RSHAPES
* rshapes module is included in the build
*
* #define SUPPORT_QUADS_DRAW_MODE
* Use QUADS instead of TRIANGLES for drawing when possible. Lines-based shapes still use LINES
*
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2013-2022 Ramon Santamaria (@raysan5)
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#include "raylib.h" // Declares module functions
// Check if config flags have been externally provided on compilation line
#if !defined(EXTERNAL_CONFIG_FLAGS)
#include "config.h" // Defines module configuration flags
#endif
#if defined(SUPPORT_MODULE_RSHAPES)
#include "rlgl.h" // OpenGL abstraction layer to OpenGL 1.1, 2.1, 3.3+ or ES2
#include <math.h> // Required for: sinf(), asinf(), cosf(), acosf(), sqrtf(), fabsf()
#include <float.h> // Required for: FLT_EPSILON
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
// Error rate to calculate how many segments we need to draw a smooth circle,
// taken from https://stackoverflow.com/a/2244088
#ifndef SMOOTH_CIRCLE_ERROR_RATE
#define SMOOTH_CIRCLE_ERROR_RATE 0.5f // Circle error rate
#endif
#ifndef BEZIER_LINE_DIVISIONS
#define BEZIER_LINE_DIVISIONS 24 // Bezier line divisions
#endif
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
// Not here...
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
Texture2D texShapes = { 1, 1, 1, 1, 7 }; // Texture used on shapes drawing (usually a white pixel)
Rectangle texShapesRec = { 0.0f, 0.0f, 1.0f, 1.0f }; // Texture source rectangle used on shapes drawing
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
static float EaseCubicInOut(float t, float b, float c, float d); // Cubic easing
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
// Set texture and rectangle to be used on shapes drawing
// NOTE: It can be useful when using basic shapes and one single font,
// defining a font char white rectangle would allow drawing everything in a single draw call
void SetShapesTexture(Texture2D texture, Rectangle source)
{
texShapes = texture;
texShapesRec = source;
}
// Draw a pixel
void DrawPixel(int posX, int posY, Color color)
{
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2i(posX, posY);
rlVertex2i(posX + 1, posY + 1);
rlEnd();
}
// Draw a pixel (Vector version)
void DrawPixelV(Vector2 position, Color color)
{
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(position.x, position.y);
rlVertex2f(position.x + 1.0f, position.y + 1.0f);
rlEnd();
}
// Draw a line
void DrawLine(int startPosX, int startPosY, int endPosX, int endPosY, Color color)
{
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2i(startPosX, startPosY);
rlVertex2i(endPosX, endPosY);
rlEnd();
}
// Draw a line (Vector version)
void DrawLineV(Vector2 startPos, Vector2 endPos, Color color)
{
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(startPos.x, startPos.y);
rlVertex2f(endPos.x, endPos.y);
rlEnd();
}
// Draw a line defining thickness
void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color)
{
Vector2 delta = { endPos.x - startPos.x, endPos.y - startPos.y };
float length = sqrtf(delta.x*delta.x + delta.y*delta.y);
if ((length > 0) && (thick > 0))
{
float scale = thick/(2*length);
Vector2 radius = { -scale*delta.y, scale*delta.x };
Vector2 strip[4] = {
{ startPos.x - radius.x, startPos.y - radius.y },
{ startPos.x + radius.x, startPos.y + radius.y },
{ endPos.x - radius.x, endPos.y - radius.y },
{ endPos.x + radius.x, endPos.y + radius.y }
};
DrawTriangleStrip(strip, 4, color);
}
}
// Draw line using cubic-bezier curves in-out
void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color)
{
Vector2 previous = startPos;
Vector2 current = { 0 };
for (int i = 1; i <= BEZIER_LINE_DIVISIONS; i++)
{
// Cubic easing in-out
// NOTE: Easing is calculated only for y position value
current.y = EaseCubicInOut((float)i, startPos.y, endPos.y - startPos.y, (float)BEZIER_LINE_DIVISIONS);
current.x = previous.x + (endPos.x - startPos.x)/ (float)BEZIER_LINE_DIVISIONS;
DrawLineEx(previous, current, thick, color);
previous = current;
}
}
// Draw line using quadratic bezier curves with a control point
void DrawLineBezierQuad(Vector2 startPos, Vector2 endPos, Vector2 controlPos, float thick, Color color)
{
const float step = 1.0f/BEZIER_LINE_DIVISIONS;
Vector2 previous = startPos;
Vector2 current = { 0 };
float t = 0.0f;
for (int i = 0; i <= BEZIER_LINE_DIVISIONS; i++)
{
t = step*i;
float a = powf(1 - t, 2);
float b = 2*(1 - t)*t;
float c = powf(t, 2);
// NOTE: The easing functions aren't suitable here because they don't take a control point
current.y = a*startPos.y + b*controlPos.y + c*endPos.y;
current.x = a*startPos.x + b*controlPos.x + c*endPos.x;
DrawLineEx(previous, current, thick, color);
previous = current;
}
}
// Draw line using cubic bezier curves with 2 control points
void DrawLineBezierCubic(Vector2 startPos, Vector2 endPos, Vector2 startControlPos, Vector2 endControlPos, float thick, Color color)
{
const float step = 1.0f/BEZIER_LINE_DIVISIONS;
Vector2 previous = startPos;
Vector2 current = { 0 };
float t = 0.0f;
for (int i = 0; i <= BEZIER_LINE_DIVISIONS; i++)
{
t = step*i;
float a = powf(1 - t, 3);
float b = 3*powf(1 - t, 2)*t;
float c = 3*(1-t)*powf(t, 2);
float d = powf(t, 3);
current.y = a*startPos.y + b*startControlPos.y + c*endControlPos.y + d*endPos.y;
current.x = a*startPos.x + b*startControlPos.x + c*endControlPos.x + d*endPos.x;
DrawLineEx(previous, current, thick, color);
previous = current;
}
}
// Draw lines sequence
void DrawLineStrip(Vector2 *points, int pointCount, Color color)
{
if (pointCount >= 2)
{
rlCheckRenderBatchLimit(pointCount);
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
for (int i = 0; i < pointCount - 1; i++)
{
rlVertex2f(points[i].x, points[i].y);
rlVertex2f(points[i + 1].x, points[i + 1].y);
}
rlEnd();
}
}
// Draw a color-filled circle
void DrawCircle(int centerX, int centerY, float radius, Color color)
{
DrawCircleV((Vector2){ (float)centerX, (float)centerY }, radius, color);
}
// Draw a piece of a circle
void DrawCircleSector(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color)
{
if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero
// Function expects (endAngle > startAngle)
if (endAngle < startAngle)
{
// Swap values
float tmp = startAngle;
startAngle = endAngle;
endAngle = tmp;
}
int minSegments = (int)ceilf((endAngle - startAngle)/90);
if (segments < minSegments)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
if (segments <= 0) segments = minSegments;
}
float stepLength = (endAngle - startAngle)/(float)segments;
float angle = startAngle;
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4*segments/2);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
// NOTE: Every QUAD actually represents two segments
for (int i = 0; i < segments/2; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength*2))*radius, center.y + cosf(DEG2RAD*(angle + stepLength*2))*radius);
angle += (stepLength*2);
}
// NOTE: In case number of segments is odd, we add one last piece to the cake
if (segments%2)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
}
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(3*segments);
rlBegin(RL_TRIANGLES);
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x, center.y);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
angle += stepLength;
}
rlEnd();
#endif
}
// Draw a piece of a circle outlines
void DrawCircleSectorLines(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color)
{
if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero issue
// Function expects (endAngle > startAngle)
if (endAngle < startAngle)
{
// Swap values
float tmp = startAngle;
startAngle = endAngle;
endAngle = tmp;
}
int minSegments = (int)ceilf((endAngle - startAngle)/90);
if (segments < minSegments)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
if (segments <= 0) segments = minSegments;
}
float stepLength = (endAngle - startAngle)/(float)segments;
float angle = startAngle;
// Hide the cap lines when the circle is full
bool showCapLines = true;
int limit = 2*(segments + 2);
if ((int)(endAngle - startAngle)%360 == 0) { limit = 2*segments; showCapLines = false; }
rlCheckRenderBatchLimit(limit);
rlBegin(RL_LINES);
if (showCapLines)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x, center.y);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
}
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
angle += stepLength;
}
if (showCapLines)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x, center.y);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
}
rlEnd();
}
// Draw a gradient-filled circle
// NOTE: Gradient goes from center (color1) to border (color2)
void DrawCircleGradient(int centerX, int centerY, float radius, Color color1, Color color2)
{
rlCheckRenderBatchLimit(3*36);
rlBegin(RL_TRIANGLES);
for (int i = 0; i < 360; i += 10)
{
rlColor4ub(color1.r, color1.g, color1.b, color1.a);
rlVertex2f((float)centerX, (float)centerY);
rlColor4ub(color2.r, color2.g, color2.b, color2.a);
rlVertex2f((float)centerX + sinf(DEG2RAD*i)*radius, (float)centerY + cosf(DEG2RAD*i)*radius);
rlColor4ub(color2.r, color2.g, color2.b, color2.a);
rlVertex2f((float)centerX + sinf(DEG2RAD*(i + 10))*radius, (float)centerY + cosf(DEG2RAD*(i + 10))*radius);
}
rlEnd();
}
// Draw a color-filled circle (Vector version)
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues
void DrawCircleV(Vector2 center, float radius, Color color)
{
DrawCircleSector(center, radius, 0, 360, 36, color);
}
// Draw circle outline
void DrawCircleLines(int centerX, int centerY, float radius, Color color)
{
rlCheckRenderBatchLimit(2*36);
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
// NOTE: Circle outline is drawn pixel by pixel every degree (0 to 360)
for (int i = 0; i < 360; i += 10)
{
rlVertex2f(centerX + sinf(DEG2RAD*i)*radius, centerY + cosf(DEG2RAD*i)*radius);
rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radius, centerY + cosf(DEG2RAD*(i + 10))*radius);
}
rlEnd();
}
// Draw ellipse
void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, Color color)
{
rlCheckRenderBatchLimit(3*36);
rlBegin(RL_TRIANGLES);
for (int i = 0; i < 360; i += 10)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f((float)centerX, (float)centerY);
rlVertex2f((float)centerX + sinf(DEG2RAD*i)*radiusH, (float)centerY + cosf(DEG2RAD*i)*radiusV);
rlVertex2f((float)centerX + sinf(DEG2RAD*(i + 10))*radiusH, (float)centerY + cosf(DEG2RAD*(i + 10))*radiusV);
}
rlEnd();
}
// Draw ellipse outline
void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color)
{
rlCheckRenderBatchLimit(2*36);
rlBegin(RL_LINES);
for (int i = 0; i < 360; i += 10)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(centerX + sinf(DEG2RAD*i)*radiusH, centerY + cosf(DEG2RAD*i)*radiusV);
rlVertex2f(centerX + sinf(DEG2RAD*(i + 10))*radiusH, centerY + cosf(DEG2RAD*(i + 10))*radiusV);
}
rlEnd();
}
// Draw ring
void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color)
{
if (startAngle == endAngle) return;
// Function expects (outerRadius > innerRadius)
if (outerRadius < innerRadius)
{
float tmp = outerRadius;
outerRadius = innerRadius;
innerRadius = tmp;
if (outerRadius <= 0.0f) outerRadius = 0.1f;
}
// Function expects (endAngle > startAngle)
if (endAngle < startAngle)
{
// Swap values
float tmp = startAngle;
startAngle = endAngle;
endAngle = tmp;
}
int minSegments = (int)ceilf((endAngle - startAngle)/90);
if (segments < minSegments)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
if (segments <= 0) segments = minSegments;
}
// Not a ring
if (innerRadius <= 0.0f)
{
DrawCircleSector(center, outerRadius, startAngle, endAngle, segments, color);
return;
}
float stepLength = (endAngle - startAngle)/(float)segments;
float angle = startAngle;
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4*segments);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
angle += stepLength;
}
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(6*segments);
rlBegin(RL_TRIANGLES);
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
angle += stepLength;
}
rlEnd();
#endif
}
// Draw ring outline
void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color)
{
if (startAngle == endAngle) return;
// Function expects (outerRadius > innerRadius)
if (outerRadius < innerRadius)
{
float tmp = outerRadius;
outerRadius = innerRadius;
innerRadius = tmp;
if (outerRadius <= 0.0f) outerRadius = 0.1f;
}
// Function expects (endAngle > startAngle)
if (endAngle < startAngle)
{
// Swap values
float tmp = startAngle;
startAngle = endAngle;
endAngle = tmp;
}
int minSegments = (int)ceilf((endAngle - startAngle)/90);
if (segments < minSegments)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
if (segments <= 0) segments = minSegments;
}
if (innerRadius <= 0.0f)
{
DrawCircleSectorLines(center, outerRadius, startAngle, endAngle, segments, color);
return;
}
float stepLength = (endAngle - startAngle)/(float)segments;
float angle = startAngle;
bool showCapLines = true;
int limit = 4*(segments + 1);
if ((int)(endAngle - startAngle)%360 == 0) { limit = 4*segments; showCapLines = false; }
rlCheckRenderBatchLimit(limit);
rlBegin(RL_LINES);
if (showCapLines)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
}
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
angle += stepLength;
}
if (showCapLines)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
}
rlEnd();
}
// Draw a color-filled rectangle
void DrawRectangle(int posX, int posY, int width, int height, Color color)
{
DrawRectangleV((Vector2){ (float)posX, (float)posY }, (Vector2){ (float)width, (float)height }, color);
}
// Draw a color-filled rectangle (Vector version)
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues
void DrawRectangleV(Vector2 position, Vector2 size, Color color)
{
DrawRectanglePro((Rectangle){ position.x, position.y, size.x, size.y }, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
}
// Draw a color-filled rectangle
void DrawRectangleRec(Rectangle rec, Color color)
{
DrawRectanglePro(rec, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
}
// Draw a color-filled rectangle with pro parameters
void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color)
{
Vector2 topLeft = { 0 };
Vector2 topRight = { 0 };
Vector2 bottomLeft = { 0 };
Vector2 bottomRight = { 0 };
// Only calculate rotation if needed
if (rotation == 0.0f)
{
float x = rec.x - origin.x;
float y = rec.y - origin.y;
topLeft = (Vector2){ x, y };
topRight = (Vector2){ x + rec.width, y };
bottomLeft = (Vector2){ x, y + rec.height };
bottomRight = (Vector2){ x + rec.width, y + rec.height };
}
else
{
float sinRotation = sinf(rotation*DEG2RAD);
float cosRotation = cosf(rotation*DEG2RAD);
float x = rec.x;
float y = rec.y;
float dx = -origin.x;
float dy = -origin.y;
topLeft.x = x + dx*cosRotation - dy*sinRotation;
topLeft.y = y + dx*sinRotation + dy*cosRotation;
topRight.x = x + (dx + rec.width)*cosRotation - dy*sinRotation;
topRight.y = y + (dx + rec.width)*sinRotation + dy*cosRotation;
bottomLeft.x = x + dx*cosRotation - (dy + rec.height)*sinRotation;
bottomLeft.y = y + dx*sinRotation + (dy + rec.height)*cosRotation;
bottomRight.x = x + (dx + rec.width)*cosRotation - (dy + rec.height)*sinRotation;
bottomRight.y = y + (dx + rec.width)*sinRotation + (dy + rec.height)*cosRotation;
}
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
rlNormal3f(0.0f, 0.0f, 1.0f);
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(topLeft.x, topLeft.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(bottomLeft.x, bottomLeft.y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(bottomRight.x, bottomRight.y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(topRight.x, topRight.y);
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(6);
rlBegin(RL_TRIANGLES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(topLeft.x, topLeft.y);
rlVertex2f(bottomLeft.x, bottomLeft.y);
rlVertex2f(topRight.x, topRight.y);
rlVertex2f(topRight.x, topRight.y);
rlVertex2f(bottomLeft.x, bottomLeft.y);
rlVertex2f(bottomRight.x, bottomRight.y);
rlEnd();
#endif
}
// Draw a vertical-gradient-filled rectangle
// NOTE: Gradient goes from bottom (color1) to top (color2)
void DrawRectangleGradientV(int posX, int posY, int width, int height, Color color1, Color color2)
{
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, color1, color2, color2, color1);
}
// Draw a horizontal-gradient-filled rectangle
// NOTE: Gradient goes from bottom (color1) to top (color2)
void DrawRectangleGradientH(int posX, int posY, int width, int height, Color color1, Color color2)
{
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, color1, color1, color2, color2);
}
// Draw a gradient-filled rectangle
// NOTE: Colors refer to corners, starting at top-lef corner and counter-clockwise
void DrawRectangleGradientEx(Rectangle rec, Color col1, Color col2, Color col3, Color col4)
{
rlCheckRenderBatchLimit(4);
rlSetTexture(texShapes.id);
rlPushMatrix();
rlBegin(RL_QUADS);
rlNormal3f(0.0f, 0.0f, 1.0f);
// NOTE: Default raylib font character 95 is a white square
rlColor4ub(col1.r, col1.g, col1.b, col1.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(rec.x, rec.y);
rlColor4ub(col2.r, col2.g, col2.b, col2.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(rec.x, rec.y + rec.height);
rlColor4ub(col3.r, col3.g, col3.b, col3.a);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(rec.x + rec.width, rec.y + rec.height);
rlColor4ub(col4.r, col4.g, col4.b, col4.a);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(rec.x + rec.width, rec.y);
rlEnd();
rlPopMatrix();
rlSetTexture(0);
}
// Draw rectangle outline
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues
void DrawRectangleLines(int posX, int posY, int width, int height, Color color)
{
#if defined(SUPPORT_QUADS_DRAW_MODE)
DrawRectangle(posX, posY, width, 1, color);
DrawRectangle(posX + width - 1, posY + 1, 1, height - 2, color);
DrawRectangle(posX, posY + height - 1, width, 1, color);
DrawRectangle(posX, posY + 1, 1, height - 2, color);
#else
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2i(posX + 1, posY + 1);
rlVertex2i(posX + width, posY + 1);
rlVertex2i(posX + width, posY + 1);
rlVertex2i(posX + width, posY + height);
rlVertex2i(posX + width, posY + height);
rlVertex2i(posX + 1, posY + height);
rlVertex2i(posX + 1, posY + height);
rlVertex2i(posX + 1, posY + 1);
rlEnd();
#endif
}
// Draw rectangle outline with extended parameters
void DrawRectangleLinesEx(Rectangle rec, float lineThick, Color color)
{
if ((lineThick > rec.width) || (lineThick > rec.height))
{
if (rec.width > rec.height) lineThick = rec.height/2;
else if (rec.width < rec.height) lineThick = rec.width/2;
}
// When rec = { x, y, 8.0f, 6.0f } and lineThick = 2, the following
// four rectangles are drawn ([T]op, [B]ottom, [L]eft, [R]ight):
//
// TTTTTTTT
// TTTTTTTT
// LL RR
// LL RR
// BBBBBBBB
// BBBBBBBB
//
Rectangle top = { rec.x, rec.y, rec.width, lineThick };
Rectangle bottom = { rec.x, rec.y - lineThick + rec.height, rec.width, lineThick };
Rectangle left = { rec.x, rec.y + lineThick, lineThick, rec.height - lineThick*2.0f };
Rectangle right = { rec.x - lineThick + rec.width, rec.y + lineThick, lineThick, rec.height - lineThick*2.0f };
DrawRectangleRec(top, color);
DrawRectangleRec(bottom, color);
DrawRectangleRec(left, color);
DrawRectangleRec(right, color);
}
// Draw rectangle with rounded edges
void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Color color)
{
// Not a rounded rectangle
if ((roundness <= 0.0f) || (rec.width < 1) || (rec.height < 1 ))
{
DrawRectangleRec(rec, color);
return;
}
if (roundness >= 1.0f) roundness = 1.0f;
// Calculate corner radius
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
if (radius <= 0.0f) return;
// Calculate number of segments to use for the corners
if (segments < 4)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
segments = (int)(ceilf(2*PI/th)/4.0f);
if (segments <= 0) segments = 4;
}
float stepLength = 90.0f/(float)segments;
/*
Quick sketch to make sense of all of this,
there are 9 parts to draw, also mark the 12 points we'll use
P0____________________P1
/| |\
/1| 2 |3\
P7 /__|____________________|__\ P2
| |P8 P9| |
| 8 | 9 | 4 |
| __|____________________|__ |
P6 \ |P11 P10| / P3
\7| 6 |5/
\|____________________|/
P5 P4
*/
// Coordinates of the 12 points that define the rounded rect
const Vector2 point[12] = {
{(float)rec.x + radius, rec.y}, {(float)(rec.x + rec.width) - radius, rec.y}, { rec.x + rec.width, (float)rec.y + radius }, // PO, P1, P2
{rec.x + rec.width, (float)(rec.y + rec.height) - radius}, {(float)(rec.x + rec.width) - radius, rec.y + rec.height}, // P3, P4
{(float)rec.x + radius, rec.y + rec.height}, { rec.x, (float)(rec.y + rec.height) - radius}, {rec.x, (float)rec.y + radius}, // P5, P6, P7
{(float)rec.x + radius, (float)rec.y + radius}, {(float)(rec.x + rec.width) - radius, (float)rec.y + radius}, // P8, P9
{(float)(rec.x + rec.width) - radius, (float)(rec.y + rec.height) - radius}, {(float)rec.x + radius, (float)(rec.y + rec.height) - radius} // P10, P11
};
const Vector2 centers[4] = { point[8], point[9], point[10], point[11] };
const float angles[4] = { 180.0f, 90.0f, 0.0f, 270.0f };
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(16*segments/2 + 5*4);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
// Draw all of the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
{
float angle = angles[k];
const Vector2 center = centers[k];
// NOTE: Every QUAD actually represents two segments
for (int i = 0; i < segments/2; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength*2))*radius, center.y + cosf(DEG2RAD*(angle + stepLength*2))*radius);
angle += (stepLength*2);
}
// NOTE: In case number of segments is odd, we add one last piece to the cake
if (segments%2)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x, center.y);
}
}
// [2] Upper Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[0].x, point[0].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[8].x, point[8].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[9].x, point[9].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[1].x, point[1].y);
// [4] Right Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[2].x, point[2].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[9].x, point[9].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[10].x, point[10].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[3].x, point[3].y);
// [6] Bottom Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[11].x, point[11].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[5].x, point[5].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[4].x, point[4].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[10].x, point[10].y);
// [8] Left Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[7].x, point[7].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[6].x, point[6].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[11].x, point[11].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[8].x, point[8].y);
// [9] Middle Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[8].x, point[8].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[11].x, point[11].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[10].x, point[10].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[9].x, point[9].y);
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(12*segments + 5*6); // 4 corners with 3 vertices per segment + 5 rectangles with 6 vertices each
rlBegin(RL_TRIANGLES);
// Draw all of the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
{
float angle = angles[k];
const Vector2 center = centers[k];
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x, center.y);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*radius, center.y + cosf(DEG2RAD*angle)*radius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*radius, center.y + cosf(DEG2RAD*(angle + stepLength))*radius);
angle += stepLength;
}
}
// [2] Upper Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[0].x, point[0].y);
rlVertex2f(point[8].x, point[8].y);
rlVertex2f(point[9].x, point[9].y);
rlVertex2f(point[1].x, point[1].y);
rlVertex2f(point[0].x, point[0].y);
rlVertex2f(point[9].x, point[9].y);
// [4] Right Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[9].x, point[9].y);
rlVertex2f(point[10].x, point[10].y);
rlVertex2f(point[3].x, point[3].y);
rlVertex2f(point[2].x, point[2].y);
rlVertex2f(point[9].x, point[9].y);
rlVertex2f(point[3].x, point[3].y);
// [6] Bottom Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[11].x, point[11].y);
rlVertex2f(point[5].x, point[5].y);
rlVertex2f(point[4].x, point[4].y);
rlVertex2f(point[10].x, point[10].y);
rlVertex2f(point[11].x, point[11].y);
rlVertex2f(point[4].x, point[4].y);
// [8] Left Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[7].x, point[7].y);
rlVertex2f(point[6].x, point[6].y);
rlVertex2f(point[11].x, point[11].y);
rlVertex2f(point[8].x, point[8].y);
rlVertex2f(point[7].x, point[7].y);
rlVertex2f(point[11].x, point[11].y);
// [9] Middle Rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[8].x, point[8].y);
rlVertex2f(point[11].x, point[11].y);
rlVertex2f(point[10].x, point[10].y);
rlVertex2f(point[9].x, point[9].y);
rlVertex2f(point[8].x, point[8].y);
rlVertex2f(point[10].x, point[10].y);
rlEnd();
#endif
}
// Draw rectangle with rounded edges outline
void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, float lineThick, Color color)
{
if (lineThick < 0) lineThick = 0;
// Not a rounded rectangle
if (roundness <= 0.0f)
{
DrawRectangleLinesEx((Rectangle){rec.x-lineThick, rec.y-lineThick, rec.width+2*lineThick, rec.height+2*lineThick}, lineThick, color);
return;
}
if (roundness >= 1.0f) roundness = 1.0f;
// Calculate corner radius
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
if (radius <= 0.0f) return;
// Calculate number of segments to use for the corners
if (segments < 4)
{
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
segments = (int)(ceilf(2*PI/th)/2.0f);
if (segments <= 0) segments = 4;
}
float stepLength = 90.0f/(float)segments;
const float outerRadius = radius + lineThick, innerRadius = radius;
/*
Quick sketch to make sense of all of this,
marks the 16 + 4(corner centers P16-19) points we'll use
P0 ================== P1
// P8 P9 \\
// \\
P7 // P15 P10 \\ P2
|| *P16 P17* ||
|| ||
|| P14 P11 ||
P6 \\ *P19 P18* // P3
\\ //
\\ P13 P12 //
P5 ================== P4
*/
const Vector2 point[16] = {
{(float)rec.x + innerRadius, rec.y - lineThick}, {(float)(rec.x + rec.width) - innerRadius, rec.y - lineThick}, { rec.x + rec.width + lineThick, (float)rec.y + innerRadius }, // PO, P1, P2
{rec.x + rec.width + lineThick, (float)(rec.y + rec.height) - innerRadius}, {(float)(rec.x + rec.width) - innerRadius, rec.y + rec.height + lineThick}, // P3, P4
{(float)rec.x + innerRadius, rec.y + rec.height + lineThick}, { rec.x - lineThick, (float)(rec.y + rec.height) - innerRadius}, {rec.x - lineThick, (float)rec.y + innerRadius}, // P5, P6, P7
{(float)rec.x + innerRadius, rec.y}, {(float)(rec.x + rec.width) - innerRadius, rec.y}, // P8, P9
{ rec.x + rec.width, (float)rec.y + innerRadius }, {rec.x + rec.width, (float)(rec.y + rec.height) - innerRadius}, // P10, P11
{(float)(rec.x + rec.width) - innerRadius, rec.y + rec.height}, {(float)rec.x + innerRadius, rec.y + rec.height}, // P12, P13
{ rec.x, (float)(rec.y + rec.height) - innerRadius}, {rec.x, (float)rec.y + innerRadius} // P14, P15
};
const Vector2 centers[4] = {
{(float)rec.x + innerRadius, (float)rec.y + innerRadius}, {(float)(rec.x + rec.width) - innerRadius, (float)rec.y + innerRadius}, // P16, P17
{(float)(rec.x + rec.width) - innerRadius, (float)(rec.y + rec.height) - innerRadius}, {(float)rec.x + innerRadius, (float)(rec.y + rec.height) - innerRadius} // P18, P19
};
const float angles[4] = { 180.0f, 90.0f, 0.0f, 270.0f };
if (lineThick > 1)
{
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4*4*segments + 4*4); // 4 corners with 4 vertices for each segment + 4 rectangles with 4 vertices each
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
{
float angle = angles[k];
const Vector2 center = centers[k];
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
angle += stepLength;
}
}
// Upper rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[0].x, point[0].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[8].x, point[8].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[9].x, point[9].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[1].x, point[1].y);
// Right rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[2].x, point[2].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[10].x, point[10].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[11].x, point[11].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[3].x, point[3].y);
// Lower rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[13].x, point[13].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[5].x, point[5].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[4].x, point[4].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[12].x, point[12].y);
// Left rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[15].x, point[15].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[7].x, point[7].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(point[6].x, point[6].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(point[14].x, point[14].y);
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(4*6*segments + 4*6); // 4 corners with 6(2*3) vertices for each segment + 4 rectangles with 6 vertices each
rlBegin(RL_TRIANGLES);
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
{
float angle = angles[k];
const Vector2 center = centers[k];
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*innerRadius, center.y + cosf(DEG2RAD*angle)*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*innerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
angle += stepLength;
}
}
// Upper rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[0].x, point[0].y);
rlVertex2f(point[8].x, point[8].y);
rlVertex2f(point[9].x, point[9].y);
rlVertex2f(point[1].x, point[1].y);
rlVertex2f(point[0].x, point[0].y);
rlVertex2f(point[9].x, point[9].y);
// Right rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[10].x, point[10].y);
rlVertex2f(point[11].x, point[11].y);
rlVertex2f(point[3].x, point[3].y);
rlVertex2f(point[2].x, point[2].y);
rlVertex2f(point[10].x, point[10].y);
rlVertex2f(point[3].x, point[3].y);
// Lower rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[13].x, point[13].y);
rlVertex2f(point[5].x, point[5].y);
rlVertex2f(point[4].x, point[4].y);
rlVertex2f(point[12].x, point[12].y);
rlVertex2f(point[13].x, point[13].y);
rlVertex2f(point[4].x, point[4].y);
// Left rectangle
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[7].x, point[7].y);
rlVertex2f(point[6].x, point[6].y);
rlVertex2f(point[14].x, point[14].y);
rlVertex2f(point[15].x, point[15].y);
rlVertex2f(point[7].x, point[7].y);
rlVertex2f(point[14].x, point[14].y);
rlEnd();
#endif
}
else
{
// Use LINES to draw the outline
rlCheckRenderBatchLimit(8*segments + 4*2); // 4 corners with 2 vertices for each segment + 4 rectangles with 2 vertices each
rlBegin(RL_LINES);
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
{
float angle = angles[k];
const Vector2 center = centers[k];
for (int i = 0; i < segments; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(center.x + sinf(DEG2RAD*angle)*outerRadius, center.y + cosf(DEG2RAD*angle)*outerRadius);
rlVertex2f(center.x + sinf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + cosf(DEG2RAD*(angle + stepLength))*outerRadius);
angle += stepLength;
}
}
// And now the remaining 4 lines
for (int i = 0; i < 8; i += 2)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(point[i].x, point[i].y);
rlVertex2f(point[i + 1].x, point[i + 1].y);
}
rlEnd();
}
}
// Draw a triangle
// NOTE: Vertex must be provided in counter-clockwise order
void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
{
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(v1.x, v1.y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(v2.x, v2.y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(v2.x, v2.y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(v3.x, v3.y);
rlEnd();
rlSetTexture(0);
#else
rlCheckRenderBatchLimit(3);
rlBegin(RL_TRIANGLES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(v1.x, v1.y);
rlVertex2f(v2.x, v2.y);
rlVertex2f(v3.x, v3.y);
rlEnd();
#endif
}
// Draw a triangle using lines
// NOTE: Vertex must be provided in counter-clockwise order
void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
{
rlCheckRenderBatchLimit(6);
rlBegin(RL_LINES);
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(v1.x, v1.y);
rlVertex2f(v2.x, v2.y);
rlVertex2f(v2.x, v2.y);
rlVertex2f(v3.x, v3.y);
rlVertex2f(v3.x, v3.y);
rlVertex2f(v1.x, v1.y);
rlEnd();
}
// Draw a triangle fan defined by points
// NOTE: First vertex provided is the center, shared by all triangles
// By default, following vertex should be provided in counter-clockwise order
void DrawTriangleFan(Vector2 *points, int pointCount, Color color)
{
if (pointCount >= 3)
{
rlCheckRenderBatchLimit((pointCount - 2)*4);
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
rlColor4ub(color.r, color.g, color.b, color.a);
for (int i = 1; i < pointCount - 1; i++)
{
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(points[0].x, points[0].y);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(points[i].x, points[i].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(points[i + 1].x, points[i + 1].y);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(points[i + 1].x, points[i + 1].y);
}
rlEnd();
rlSetTexture(0);
}
}
// Draw a triangle strip defined by points
// NOTE: Every new vertex connects with previous two
void DrawTriangleStrip(Vector2 *points, int pointCount, Color color)
{
if (pointCount >= 3)
{
rlCheckRenderBatchLimit(3*(pointCount - 2));
rlBegin(RL_TRIANGLES);
rlColor4ub(color.r, color.g, color.b, color.a);
for (int i = 2; i < pointCount; i++)
{
if ((i%2) == 0)
{
rlVertex2f(points[i].x, points[i].y);
rlVertex2f(points[i - 2].x, points[i - 2].y);
rlVertex2f(points[i - 1].x, points[i - 1].y);
}
else
{
rlVertex2f(points[i].x, points[i].y);
rlVertex2f(points[i - 1].x, points[i - 1].y);
rlVertex2f(points[i - 2].x, points[i - 2].y);
}
}
rlEnd();
}
}
// Draw a regular polygon of n sides (Vector version)
void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color color)
{
if (sides < 3) sides = 3;
float centralAngle = 0.0f;
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4*sides); // Each side is a quad
#else
rlCheckRenderBatchLimit(3*sides);
#endif
rlPushMatrix();
rlTranslatef(center.x, center.y, 0.0f);
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
for (int i = 0; i < sides; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(0, 0);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
centralAngle += 360.0f/(float)sides;
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
}
rlEnd();
rlSetTexture(0);
#else
rlBegin(RL_TRIANGLES);
for (int i = 0; i < sides; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(0, 0);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
centralAngle += 360.0f/(float)sides;
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
}
rlEnd();
#endif
rlPopMatrix();
}
// Draw a polygon outline of n sides
void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Color color)
{
if (sides < 3) sides = 3;
float centralAngle = 0.0f;
rlCheckRenderBatchLimit(2*sides);
rlPushMatrix();
rlTranslatef(center.x, center.y, 0.0f);
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
rlBegin(RL_LINES);
for (int i = 0; i < sides; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
centralAngle += 360.0f/(float)sides;
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
}
rlEnd();
rlPopMatrix();
}
void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, float lineThick, Color color)
{
if (sides < 3) sides = 3;
float centralAngle = 0.0f;
float exteriorAngle = 360.0f/(float)sides;
float innerRadius = radius - (lineThick*cosf(DEG2RAD*exteriorAngle/2.0f));
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlCheckRenderBatchLimit(4*sides);
#else
rlCheckRenderBatchLimit(6*sides);
#endif
rlPushMatrix();
rlTranslatef(center.x, center.y, 0.0f);
rlRotatef(rotation, 0.0f, 0.0f, 1.0f);
#if defined(SUPPORT_QUADS_DRAW_MODE)
rlSetTexture(texShapes.id);
rlBegin(RL_QUADS);
for (int i = 0; i < sides; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
rlTexCoord2f(texShapesRec.x/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*innerRadius, cosf(DEG2RAD*centralAngle)*innerRadius);
rlTexCoord2f(texShapesRec.x/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
centralAngle += exteriorAngle;
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, texShapesRec.y/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
rlTexCoord2f((texShapesRec.x + texShapesRec.width)/texShapes.width, (texShapesRec.y + texShapesRec.height)/texShapes.height);
rlVertex2f(sinf(DEG2RAD*centralAngle)*innerRadius, cosf(DEG2RAD*centralAngle)*innerRadius);
}
rlEnd();
rlSetTexture(0);
#else
rlBegin(RL_TRIANGLES);
for (int i = 0; i < sides; i++)
{
rlColor4ub(color.r, color.g, color.b, color.a);
float nextAngle = centralAngle + exteriorAngle;
rlVertex2f(sinf(DEG2RAD*centralAngle)*radius, cosf(DEG2RAD*centralAngle)*radius);
rlVertex2f(sinf(DEG2RAD*centralAngle)*innerRadius, cosf(DEG2RAD*centralAngle)*innerRadius);
rlVertex2f(sinf(DEG2RAD*nextAngle)*radius, cosf(DEG2RAD*nextAngle)*radius);
rlVertex2f(sinf(DEG2RAD*centralAngle)*innerRadius, cosf(DEG2RAD*centralAngle)*innerRadius);
rlVertex2f(sinf(DEG2RAD*nextAngle)*radius, cosf(DEG2RAD*nextAngle)*radius);
rlVertex2f(sinf(DEG2RAD*nextAngle)*innerRadius, cosf(DEG2RAD*nextAngle)*innerRadius);
centralAngle = nextAngle;
}
rlEnd();
#endif
rlPopMatrix();
}
//----------------------------------------------------------------------------------
// Module Functions Definition - Collision Detection functions
//----------------------------------------------------------------------------------
// Check if point is inside rectangle
bool CheckCollisionPointRec(Vector2 point, Rectangle rec)
{
bool collision = false;
if ((point.x >= rec.x) && (point.x <= (rec.x + rec.width)) && (point.y >= rec.y) && (point.y <= (rec.y + rec.height))) collision = true;
return collision;
}
// Check if point is inside circle
bool CheckCollisionPointCircle(Vector2 point, Vector2 center, float radius)
{
bool collision = false;
collision = CheckCollisionCircles(point, 0, center, radius);
return collision;
}
// Check if point is inside a triangle defined by three points (p1, p2, p3)
bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2 p3)
{
bool collision = false;
float alpha = ((p2.y - p3.y)*(point.x - p3.x) + (p3.x - p2.x)*(point.y - p3.y)) /
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
float beta = ((p3.y - p1.y)*(point.x - p3.x) + (p1.x - p3.x)*(point.y - p3.y)) /
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
float gamma = 1.0f - alpha - beta;
if ((alpha > 0) && (beta > 0) && (gamma > 0)) collision = true;
return collision;
}
// Check collision between two rectangles
bool CheckCollisionRecs(Rectangle rec1, Rectangle rec2)
{
bool collision = false;
if ((rec1.x < (rec2.x + rec2.width) && (rec1.x + rec1.width) > rec2.x) &&
(rec1.y < (rec2.y + rec2.height) && (rec1.y + rec1.height) > rec2.y)) collision = true;
return collision;
}
// Check collision between two circles
bool CheckCollisionCircles(Vector2 center1, float radius1, Vector2 center2, float radius2)
{
bool collision = false;
float dx = center2.x - center1.x; // X distance between centers
float dy = center2.y - center1.y; // Y distance between centers
float distance = sqrtf(dx*dx + dy*dy); // Distance between centers
if (distance <= (radius1 + radius2)) collision = true;
return collision;
}
// Check collision between circle and rectangle
// NOTE: Reviewed version to take into account corner limit case
bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec)
{
bool collision = false;
int recCenterX = (int)(rec.x + rec.width/2.0f);
int recCenterY = (int)(rec.y + rec.height/2.0f);
float dx = fabsf(center.x - (float)recCenterX);
float dy = fabsf(center.y - (float)recCenterY);
if (dx > (rec.width/2.0f + radius)) { return false; }
if (dy > (rec.height/2.0f + radius)) { return false; }
if (dx <= (rec.width/2.0f)) { return true; }
if (dy <= (rec.height/2.0f)) { return true; }
float cornerDistanceSq = (dx - rec.width/2.0f)*(dx - rec.width/2.0f) +
(dy - rec.height/2.0f)*(dy - rec.height/2.0f);
collision = (cornerDistanceSq <= (radius*radius));
return collision;
}
// Check the collision between two lines defined by two points each, returns collision point by reference
bool CheckCollisionLines(Vector2 startPos1, Vector2 endPos1, Vector2 startPos2, Vector2 endPos2, Vector2 *collisionPoint)
{
bool collision = false;
float div = (endPos2.y - startPos2.y)*(endPos1.x - startPos1.x) - (endPos2.x - startPos2.x)*(endPos1.y - startPos1.y);
if (fabsf(div) >= FLT_EPSILON)
{
collision = true;
float xi = ((startPos2.x - endPos2.x)*(startPos1.x*endPos1.y - startPos1.y*endPos1.x) - (startPos1.x - endPos1.x)*(startPos2.x*endPos2.y - startPos2.y*endPos2.x))/div;
float yi = ((startPos2.y - endPos2.y)*(startPos1.x*endPos1.y - startPos1.y*endPos1.x) - (startPos1.y - endPos1.y)*(startPos2.x*endPos2.y - startPos2.y*endPos2.x))/div;
if (((fabsf(startPos1.x - endPos1.x) > FLT_EPSILON) && (xi < fminf(startPos1.x, endPos1.x) || (xi > fmaxf(startPos1.x, endPos1.x)))) ||
((fabsf(startPos2.x - endPos2.x) > FLT_EPSILON) && (xi < fminf(startPos2.x, endPos2.x) || (xi > fmaxf(startPos2.x, endPos2.x)))) ||
((fabsf(startPos1.y - endPos1.y) > FLT_EPSILON) && (yi < fminf(startPos1.y, endPos1.y) || (yi > fmaxf(startPos1.y, endPos1.y)))) ||
((fabsf(startPos2.y - endPos2.y) > FLT_EPSILON) && (yi < fminf(startPos2.y, endPos2.y) || (yi > fmaxf(startPos2.y, endPos2.y))))) collision = false;
if (collision && (collisionPoint != 0))
{
collisionPoint->x = xi;
collisionPoint->y = yi;
}
}
return collision;
}
// Check if point belongs to line created between two points [p1] and [p2] with defined margin in pixels [threshold]
bool CheckCollisionPointLine(Vector2 point, Vector2 p1, Vector2 p2, int threshold)
{
bool collision = false;
float dxc = point.x - p1.x;
float dyc = point.y - p1.y;
float dxl = p2.x - p1.x;
float dyl = p2.y - p1.y;
float cross = dxc*dyl - dyc*dxl;
if (fabsf(cross) < (threshold*fmaxf(fabsf(dxl), fabsf(dyl))))
{
if (fabsf(dxl) >= fabsf(dyl)) collision = (dxl > 0)? ((p1.x <= point.x) && (point.x <= p2.x)) : ((p2.x <= point.x) && (point.x <= p1.x));
else collision = (dyl > 0)? ((p1.y <= point.y) && (point.y <= p2.y)) : ((p2.y <= point.y) && (point.y <= p1.y));
}
return collision;
}
// Get collision rectangle for two rectangles collision
Rectangle GetCollisionRec(Rectangle rec1, Rectangle rec2)
{
Rectangle rec = { 0, 0, 0, 0 };
if (CheckCollisionRecs(rec1, rec2))
{
float dxx = fabsf(rec1.x - rec2.x);
float dyy = fabsf(rec1.y - rec2.y);
if (rec1.x <= rec2.x)
{
if (rec1.y <= rec2.y)
{
rec.x = rec2.x;
rec.y = rec2.y;
rec.width = rec1.width - dxx;
rec.height = rec1.height - dyy;
}
else
{
rec.x = rec2.x;
rec.y = rec1.y;
rec.width = rec1.width - dxx;
rec.height = rec2.height - dyy;
}
}
else
{
if (rec1.y <= rec2.y)
{
rec.x = rec1.x;
rec.y = rec2.y;
rec.width = rec2.width - dxx;
rec.height = rec1.height - dyy;
}
else
{
rec.x = rec1.x;
rec.y = rec1.y;
rec.width = rec2.width - dxx;
rec.height = rec2.height - dyy;
}
}
if (rec1.width > rec2.width)
{
if (rec.width >= rec2.width) rec.width = rec2.width;
}
else
{
if (rec.width >= rec1.width) rec.width = rec1.width;
}
if (rec1.height > rec2.height)
{
if (rec.height >= rec2.height) rec.height = rec2.height;
}
else
{
if (rec.height >= rec1.height) rec.height = rec1.height;
}
}
return rec;
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
// Cubic easing in-out
// NOTE: Used by DrawLineBezier() only
static float EaseCubicInOut(float t, float b, float c, float d)
{
if ((t /= 0.5f*d) < 1) return 0.5f*c*t*t*t + b;
t -= 2;
return 0.5f*c*(t*t*t + 2.0f) + b;
}
#endif // SUPPORT_MODULE_RSHAPES