108 lines
4.2 KiB
C
108 lines
4.2 KiB
C
/*******************************************************************************************
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*
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* raylib [core] example - Picking in 3d mode
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*
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* This example has been created using raylib 1.3 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2015 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking");
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// Define the camera to look into our 3d world
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Camera camera = { 0 };
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camera.position = (Vector3){ 10.0f, 10.0f, 10.0f }; // Camera position
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camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point
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camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
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camera.fovy = 45.0f; // Camera field-of-view Y
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camera.projection = CAMERA_PERSPECTIVE; // Camera mode type
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Vector3 cubePosition = { 0.0f, 1.0f, 0.0f };
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Vector3 cubeSize = { 2.0f, 2.0f, 2.0f };
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Ray ray = { 0 }; // Picking line ray
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RayCollision collision = { 0 };
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SetCameraMode(camera, CAMERA_FREE); // Set a free camera mode
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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UpdateCamera(&camera); // Update camera
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if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
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{
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if (!collision.hit)
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{
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ray = GetMouseRay(GetMousePosition(), camera);
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// Check collision between ray and box
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collision = GetRayCollisionBox(ray,
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(BoundingBox){(Vector3){ cubePosition.x - cubeSize.x/2, cubePosition.y - cubeSize.y/2, cubePosition.z - cubeSize.z/2 },
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(Vector3){ cubePosition.x + cubeSize.x/2, cubePosition.y + cubeSize.y/2, cubePosition.z + cubeSize.z/2 }});
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}
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else collision.hit = false;
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}
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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BeginMode3D(camera);
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if (collision.hit)
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{
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DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, RED);
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DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, MAROON);
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DrawCubeWires(cubePosition, cubeSize.x + 0.2f, cubeSize.y + 0.2f, cubeSize.z + 0.2f, GREEN);
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}
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else
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{
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DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, GRAY);
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DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, DARKGRAY);
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}
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DrawRay(ray, MAROON);
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DrawGrid(10, 1.0f);
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EndMode3D();
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DrawText("Try selecting the box with mouse!", 240, 10, 20, DARKGRAY);
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if (collision.hit) DrawText("BOX SELECTED", (screenWidth - MeasureText("BOX SELECTED", 30)) / 2, (int)(screenHeight * 0.1f), 30, GREEN);
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DrawFPS(10, 10);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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