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/*******************************************************************************************
*
* raylib [shapes] example - collision area
*
* This example has been created using raylib 2.5 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Copyright (c) 2013-2019 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Rectangle boxA = { 0 };
Rectangle boxB = { 0 };
int boxASpeedX = 4;
Rectangle boxCollision = { 0 }; // Collision rectangle
int screenUpperLimit = 40; // Top menu limits
static bool pause = false; // Movement pause
bool collision = false; // Collision detection
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Program Main Entry Point
//----------------------------------------------------------------------------------
int main(void)
{
// Initialization
//---------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - collision area");
// Box A: Moving box
boxA = (Rectangle){ 10, GetScreenHeight()/2 - 50, 200, 100 };
// Box B: Mouse moved box
boxB = (Rectangle){ GetScreenWidth()/2 - 30, GetScreenHeight()/2 - 30, 60, 60 };
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//---------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//----------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// Update
//-----------------------------------------------------
// Move box if not paused
if (!pause) boxA.x += boxASpeedX;
// Bounce box on x screen limits
if (((boxA.x + boxA.width) >= GetScreenWidth()) || (boxA.x <= 0)) boxASpeedX *= -1;
// Update player-controlled-box (box02)
boxB.x = GetMouseX() - boxB.width/2;
boxB.y = GetMouseY() - boxB.height/2;
// Make sure Box B does not go out of move area limits
if ((boxB.x + boxB.width) >= GetScreenWidth()) boxB.x = GetScreenWidth() - boxB.width;
else if (boxB.x <= 0) boxB.x = 0;
if ((boxB.y + boxB.height) >= GetScreenHeight()) boxB.y = GetScreenHeight() - boxB.height;
else if (boxB.y <= screenUpperLimit) boxB.y = screenUpperLimit;
// Check boxes collision
collision = CheckCollisionRecs(boxA, boxB);
// Get collision rectangle (only on collision)
if (collision) boxCollision = GetCollisionRec(boxA, boxB);
// Pause Box A movement
if (IsKeyPressed(KEY_SPACE)) pause = !pause;
//-----------------------------------------------------
// Draw
//-----------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
DrawRectangle(0, 0, screenWidth, screenUpperLimit, collision? RED : BLACK);
DrawRectangleRec(boxA, GOLD);
DrawRectangleRec(boxB, BLUE);
if (collision)
{
// Draw collision area
DrawRectangleRec(boxCollision, LIME);
// Draw collision message
DrawText("COLLISION!", GetScreenWidth()/2 - MeasureText("COLLISION!", 20)/2, screenUpperLimit/2 - 10, 20, BLACK);
// Draw collision area
DrawText(FormatText("Collision Area: %i", (int)boxCollision.width*(int)boxCollision.height), GetScreenWidth()/2 - 100, screenUpperLimit + 10, 20, BLACK);
}
DrawFPS(10, 10);
EndDrawing();
//-----------------------------------------------------
}
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