1/*******************************************************************************************
2*
3* raylib [shapes] example - collision area
4*
5* This example has been created using raylib 2.5 (www.raylib.com)
6* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
7*
8* Copyright (c) 2013-2019 Ramon Santamaria (@raysan5)
9*
10********************************************************************************************/
11
12#include "raylib.h"
13#include <stdlib.h> // Required for abs()
14
15int main(void)
16{
17 // Initialization
18 //---------------------------------------------------------
19 const int screenWidth = 800;
20 const int screenHeight = 450;
21
22 InitWindow(screenWidth, screenHeight, "raylib [shapes] example - collision area");
23
24 // Box A: Moving box
25 Rectangle boxA = { 10, GetScreenHeight()/2 - 50, 200, 100 };
26 int boxASpeedX = 4;
27
28 // Box B: Mouse moved box
29 Rectangle boxB = { GetScreenWidth()/2 - 30, GetScreenHeight()/2 - 30, 60, 60 };
30
31 Rectangle boxCollision = { 0 }; // Collision rectangle
32
33 int screenUpperLimit = 40; // Top menu limits
34
35 bool pause = false; // Movement pause
36 bool collision = false; // Collision detection
37
38 SetTargetFPS(60); // Set our game to run at 60 frames-per-second
39 //----------------------------------------------------------
40
41 // Main game loop
42 while (!WindowShouldClose()) // Detect window close button or ESC key
43 {
44 // Update
45 //-----------------------------------------------------
46 // Move box if not paused
47 if (!pause) boxA.x += boxASpeedX;
48
49 // Bounce box on x screen limits
50 if (((boxA.x + boxA.width) >= GetScreenWidth()) || (boxA.x <= 0)) boxASpeedX *= -1;
51
52 // Update player-controlled-box (box02)
53 boxB.x = GetMouseX() - boxB.width/2;
54 boxB.y = GetMouseY() - boxB.height/2;
55
56 // Make sure Box B does not go out of move area limits
57 if ((boxB.x + boxB.width) >= GetScreenWidth()) boxB.x = GetScreenWidth() - boxB.width;
58 else if (boxB.x <= 0) boxB.x = 0;
59
60 if ((boxB.y + boxB.height) >= GetScreenHeight()) boxB.y = GetScreenHeight() - boxB.height;
61 else if (boxB.y <= screenUpperLimit) boxB.y = screenUpperLimit;
62
63 // Check boxes collision
64 collision = CheckCollisionRecs(boxA, boxB);
65
66 // Get collision rectangle (only on collision)
67 if (collision) boxCollision = GetCollisionRec(boxA, boxB);
68
69 // Pause Box A movement
70 if (IsKeyPressed(KEY_SPACE)) pause = !pause;
71 //-----------------------------------------------------
72
73 // Draw
74 //-----------------------------------------------------
75 BeginDrawing();
76
77 ClearBackground(RAYWHITE);
78
79 DrawRectangle(0, 0, screenWidth, screenUpperLimit, collision? RED : BLACK);
80
81 DrawRectangleRec(boxA, GOLD);
82 DrawRectangleRec(boxB, BLUE);
83
84 if (collision)
85 {
86 // Draw collision area
87 DrawRectangleRec(boxCollision, LIME);
88
89 // Draw collision message
90 DrawText("COLLISION!", GetScreenWidth()/2 - MeasureText("COLLISION!", 20)/2, screenUpperLimit/2 - 10, 20, BLACK);
91
92 // Draw collision area
93 DrawText(FormatText("Collision Area: %i", (int)boxCollision.width*(int)boxCollision.height), GetScreenWidth()/2 - 100, screenUpperLimit + 10, 20, BLACK);
94 }
95
96 DrawFPS(10, 10);
97
98 EndDrawing();
99 //-----------------------------------------------------
100 }
101
102 // De-Initialization
103 //---------------------------------------------------------
104 CloseWindow(); // Close window and OpenGL context
105 //----------------------------------------------------------
106
107 return 0;
108}