Create Collision_-_RectTileMAPCollide.c

Collision_-_RectTileMAPCollide.c

@@ -0,0 +1,136 @@
+//
+// POINTTILECOLLIDE function
+//
+// Here is a example of how to check collision with a point and a tile on a tilemap.
+//
+
+#include "raylib.h"
+#include <math.h>
+
+#define MAX_CARS 100
+#define MAX_WHISKERS 8
+
+   
+int myMap[10][11] =  {  {1,1,1,1,1,1,1,1,1,1,1},
+                        {1,0,0,0,0,0,0,0,0,0,1},
+                        {1,0,1,1,1,1,1,1,1,0,1},
+                        {1,0,1,1,1,1,1,0,0,0,1},
+                        {1,0,1,0,0,0,1,0,1,1,1},
+                        {1,0,1,0,1,0,1,0,0,0,1},
+                        {1,0,1,0,1,0,1,1,1,0,1},
+                        {1,0,1,0,1,0,1,1,1,0,1},
+                        {1,0,0,0,1,0,0,0,0,0,1},
+                        {1,1,1,1,1,1,1,1,1,1,1}
+                    };  
+int mapWidth = 11;
+int mapHeight = 10;
+float tileWidth;
+float tileHeight;
+
+
+//Unit collide with solid blocks true/false
+bool recttilecollide(int x, int y, int w, int h, int offsetx,int offsety);
+// Our rectsoverlap function. Returns true/false.
+static bool rectsoverlap(int x1,int y1,int w1,int h1,int x2,int y2,int w2,int h2);
+                        
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 600;
+    tileWidth = ceil((float)(float)screenWidth/(float)mapWidth);
+    tileHeight = ceil((float)screenHeight/(float)mapHeight);
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+ 
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    Vector2 position;
+    position.x = 100;
+    position.y = 100;
+    int time=0;
+    Color collisionColor = GREEN;
+    
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        time++;
+        if(time>30){ // every time time is at 300
+            time=0;//reset time
+            position.x = GetRandomValue(32,screenWidth-32);
+            position.y = GetRandomValue(32,screenHeight-32);
+        }
+        
+        if(recttilecollide(position.x,position.y,tileWidth/2, tileHeight/2, 0,0)){
+            collisionColor = RED;
+        }else{
+            collisionColor = GREEN;
+        }
+        
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            // Draw map
+            for (int y = 0; y< mapHeight ; y++)
+            {
+                for (int x = 0; x< mapWidth ; x++)
+                {
+                    if (myMap[y][x] == 1)
+                    {
+                        DrawRectangle(x*tileWidth,y*tileHeight,tileWidth,tileHeight,BLUE);
+                    }
+                }
+            }
+            
+            DrawRectangle(position.x,position.y,tileWidth/2,tileHeight/2,collisionColor);
+                
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+
+
+
+//Unit collide with solid blocks true/false
+bool recttilecollide(int x, int y,int w, int h, int offsetx,int offsety){
+    int cx = (x+offsetx)/tileWidth;
+    int cy = (y+offsety)/tileHeight;
+    for(int y2=cy-1; y2<cy+2;y2++){//Note that the - and + are to be set differently with differently sized players
+    for(int x2=cx-1; x2<cx+2;x2++){
+        if(x2>=0 && x2<mapWidth && y2>=0 && y2<mapHeight){
+            if(myMap[y2][x2] == 1){
+                int x3 = (x2)*tileWidth;
+                int y3 = (y2)*tileHeight;
+                if(rectsoverlap(x+offsetx,y+offsety,w,h,x3,y3,tileWidth,tileHeight)){
+                    return true;
+                }
+            }
+        }
+    }}
+    return false;
+}
+
+// Rectangles overlap
+bool rectsoverlap(int x1,int y1,int w1,int h1,int x2,int y2,int w2,int h2){
+    if(x1 >= (x2 + w2) || (x1 + w1) <= x2) return false;
+    if(y1 >= (y2 + h2) || (y1 + h1) <= y2) return false;
+    return true;
+}