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/*******************************************************************************************
*
* raylib [shapes] example - collision area
*
* Example originally created with raylib 2.5, last time updated with raylib 2.5
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2013-2024 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
#include "raylib.h"
#include <stdlib.h> // Required for: abs()
//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
// Initialization
//---------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - collision area");
// Box A: Moving box
Rectangle boxA = { 10, GetScreenHeight()/2.0f - 50, 200, 100 };
int boxASpeedX = 4;
// Box B: Mouse moved box
Rectangle boxB = { GetScreenWidth()/2.0f - 30, GetScreenHeight()/2.0f - 30, 60, 60 };
Rectangle boxCollision = { 0 }; // Collision rectangle
int screenUpperLimit = 40; // Top menu limits
bool pause = false; // Movement pause
bool collision = false; // Collision detection
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
//-----------------------------------------------------
// 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 = (float)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(TextFormat("Collision Area: %i", (int)boxCollision.width*(int)boxCollision.height), GetScreenWidth()/2 - 100, screenUpperLimit + 10, 20, BLACK);
}
// Draw help instructions
DrawText("Press SPACE to PAUSE/RESUME", 20, screenHeight - 35, 20, LIGHTGRAY);
DrawFPS(10, 10);
EndDrawing();
//-----------------------------------------------------
}
// De-Initialization
//---------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//----------------------------------------------------------
return 0;
}
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