working 1

examples/shapes/shapes_collision_area.c

@@ -27,81 +27,42 @@ int main(void)
 
     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
     //----------------------------------------------------------
 
+
+    Vector2 p0 = { 0,0 };
+    Vector2 p1 = { 300,300 };
+
+ 
+    float r = 20.0f;
+
+    Color col = RED;
+
+
+
     // Main game loop
     while (!WindowShouldClose())    // Detect window close button or ESC key
     {
-        // Update
+        Vector2 c = { GetMouseX(),GetMouseY() };
-        //-----------------------------------------------------
-        // 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;
         //-----------------------------------------------------
+        if (CheckCollisionCircleLine(c, r, p0, p1))
+        {
+            col = BLUE;
+        }
+        else
+        {
+            col = RED;
+        }
 
         // Draw
         //-----------------------------------------------------
         BeginDrawing();
 
             ClearBackground(RAYWHITE);
-
+            DrawLine(p0.x, p0.y, p1.x, p1.y, BLACK);
-            DrawRectangle(0, 0, screenWidth, screenUpperLimit, collision? RED : BLACK);
+            DrawCircle(c.x, c.y, r, col);
-
-            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();

src/rshapes.c

@@ -2334,7 +2334,10 @@ RLAPI bool CheckCollisionCircleLine(Vector2 center, float radius, Vector2 p1, Ve
     float closeX = p1.x + (dotProduct * (p2.x - p1.x));
     float closeY = p1.y + (dotProduct * (p2.y - p1.y));
 
-    bool onSegment = CheckCollisionPointLine((Vector2) { closeX, closeY }, p1, p2, 0);
+
+    Vector2 close = { closeX, closeY };
+
+    bool onSegment = CheckCollisionPointLine(close, p1, p2, 1);
     if (!onSegment) return false;
 
     //distnce from circle to closest point