Shipwright/OTRGui/libs/raylib/examples/physics/physics_restitution.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"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"
2022-03-22 02:53:51 +01:00

130 lines
5.5 KiB
C

/*******************************************************************************************
*
* raylib [physac] example - physics restitution
*
* This example has been created using raylib 1.5 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
*
* Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#define PHYSAC_IMPLEMENTATION
#include "extras/physac.h"
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
SetConfigFlags(FLAG_MSAA_4X_HINT);
InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics restitution");
// Physac logo drawing position
int logoX = screenWidth - MeasureText("Physac", 30) - 10;
int logoY = 15;
// Initialize physics and default physics bodies
InitPhysics();
// Create floor rectangle physics body
PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2.0f, (float)screenHeight }, (float)screenWidth, 100, 10);
floor->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
floor->restitution = 1;
// Create circles physics body
PhysicsBody circleA = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.25f, screenHeight/2.0f }, 30, 10);
circleA->restitution = 0;
PhysicsBody circleB = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.5f, screenHeight/2.0f }, 30, 10);
circleB->restitution = 0.5f;
PhysicsBody circleC = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.75f, screenHeight/2.0f }, 30, 10);
circleC->restitution = 1;
// Restitution demo needs a very tiny physics time step for a proper simulation
SetPhysicsTimeStep(1.0/60.0/100*1000);
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
UpdatePhysics(); // Update physics system
if (IsKeyPressed(KEY_R)) // Reset physics input
{
// Reset circles physics bodies position and velocity
circleA->position = (Vector2){ screenWidth*0.25f, screenHeight/2.0f };
circleA->velocity = (Vector2){ 0, 0 };
circleB->position = (Vector2){ screenWidth*0.5f, screenHeight/2.0f };
circleB->velocity = (Vector2){ 0, 0 };
circleC->position = (Vector2){ screenWidth*0.75f, screenHeight/2.0f };
circleC->velocity = (Vector2){ 0, 0 };
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(BLACK);
DrawFPS(screenWidth - 90, screenHeight - 30);
// Draw created physics bodies
int bodiesCount = GetPhysicsBodiesCount();
for (int i = 0; i < bodiesCount; i++)
{
PhysicsBody body = GetPhysicsBody(i);
int vertexCount = GetPhysicsShapeVerticesCount(i);
for (int j = 0; j < vertexCount; j++)
{
// Get physics bodies shape vertices to draw lines
// Note: GetPhysicsShapeVertex() already calculates rotation transformations
Vector2 vertexA = GetPhysicsShapeVertex(body, j);
int jj = (((j + 1) < vertexCount) ? (j + 1) : 0); // Get next vertex or first to close the shape
Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
DrawLineV(vertexA, vertexB, GREEN); // Draw a line between two vertex positions
}
}
DrawText("Restitution amount", (screenWidth - MeasureText("Restitution amount", 30))/2, 75, 30, WHITE);
DrawText("0", (int)circleA->position.x - MeasureText("0", 20)/2, circleA->position.y - 7, 20, WHITE);
DrawText("0.5", (int)circleB->position.x - MeasureText("0.5", 20)/2, circleB->position.y - 7, 20, WHITE);
DrawText("1", (int)circleC->position.x - MeasureText("1", 20)/2, circleC->position.y - 7, 20, WHITE);
DrawText("Press 'R' to reset example", 10, 10, 10, WHITE);
DrawText("Physac", logoX, logoY, 30, WHITE);
DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
DestroyPhysicsBody(circleA);
DestroyPhysicsBody(circleB);
DestroyPhysicsBody(circleC);
DestroyPhysicsBody(floor);
ClosePhysics(); // Unitialize physics
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}