Fixed Paddle glitch

breakout.c

@@ -66,8 +66,8 @@ void BREAKOUT_ChangeSize(int width, int height){
 }
 
 void BREAKOUT_Update(Uint8 * keystate){
+    PADDLE_Update(&paddle, keystate); // Update paddle before ball because paddle is not static!
     BALL_Update(&ball, &paddle);
-    PADDLE_Update(&paddle, keystate);
     for (size_t i = 0; i < BlockCount; i++) {
         BLOCK_Update(blocks + i);
     }
@@ -134,7 +134,7 @@ void BALL_Draw(SDL_Renderer * renderer, Ball * obj){
 }
 
 bool BALL_CollideWithRect(Ball * obj, SDL_Rect * rect){
-    SDL_Point ballCenter = (SDL_Point) {.x = ((obj->TargetRect).x) + (obj->Size), .y = ((obj->TargetRect).y) + (obj->Size) };
+    SDL_Point ballCenter = BALL_GetCenter(obj);
 
     // THIS IS CURRENTLY A RECTANGLE COLLIDE
     if (((obj->TargetRect).x) + ((obj->TargetRect).w) < (rect->x)) {
@@ -149,7 +149,7 @@ bool BALL_CollideWithRect(Ball * obj, SDL_Rect * rect){
     if (((obj->TargetRect).y) > (rect->y) + (rect->h)) {
         return false;
     }
-    // Folgender Algorithmus ist gefickt, wenn der Ballmittelpunkt
+    // Folgender Algorithmus ist gefickt, wenn der Ballmittelpunkt im rechteck liegt!
     if ((ballCenter.x) < (rect->x) || (ballCenter.x) > (rect->x) + (rect->w)) {
         (obj->Momentum).x = -(obj->Momentum).x;
     }
@@ -182,26 +182,42 @@ void BALL_SteerMomentum(Ball * obj, Paddle * paddle){
     offset *= 60.0f;
     offset /= (double)(paddleHalfLen);
     printf("Offset = %.2f\n", offset);
-    (obj->Momentum) = getScaledDirectionalUnitVector(offset, BALL_Speed);
+    (obj->Momentum) = getDirectionalUnitVector(offset);
+}
+
+void RECT_SetTargetPos(SDL_Rect * rect, Vector * Location){
+    rect->x = (int)round(Location->x);
+    rect->y = (int)round(Location->y);
+}
+
+SDL_Point BALL_GetCenter(Ball * obj){
+    return (SDL_Point) {.x = ((obj->TargetRect).x) + (obj->Size), .y = ((obj->TargetRect).y) + (obj->Size) };
 }
 
 void BALL_Update(Ball * obj, Paddle * paddle){
     Vector oldMomentum = obj->Momentum;
+    Vector oldLocation = obj->Location;
+    SDL_Point ballCenter = BALL_GetCenter(obj);
 
-    (obj->Rotation) += (obj->RotationValue);
+    (obj->Rotation) += (obj->RotationValue); // No effect on physics
     (obj->Location) = vectorAdd((obj->Location), oldMomentum);
 
     if (BALL_CollideWithRect(obj, &(paddle->TargetRect))) {
-        (obj->Location) = vectorSub((obj->Location), oldMomentum);   // Maybe remove this
+        (obj->Location) = oldLocation;   // Maybe remove this
-        BALL_SteerMomentum(obj, paddle);
+        BALL_SteerMomentum(obj, paddle); // Sets it to unit vector!
-        (obj->Location) = vectorAdd((obj->Location), (obj->Momentum));     // Maybe remove this
+        // Following assumes that the paddle position was udated before the ball was updated
+// BUG/GLITCH: Make sure that the postition of the ball is not shited into the borders of the game!
+        while (RECT_Collide(&(obj->TargetRect), &(paddle->TargetRect))) { // Move away from rect in small steps
+            (obj->Location) = vectorAdd((obj->Location), (obj->Momentum));
+            RECT_SetTargetPos(&(obj->TargetRect), &(obj->Location));
+        }
+        (obj->Momentum) = vectorScaleTo((obj->Momentum), BALL_Speed);
     }
-    oldMomentum = obj->Momentum;
     for (size_t i = 0; i < BlockCount; i++) {
+        oldMomentum = obj->Momentum;
         BALL_CollideWithRect(obj, &(blocks[i].TargetRect));
         (obj->Location) = vectorSub((obj->Location), oldMomentum);       // Maybe remove this
         (obj->Location) = vectorAdd((obj->Location), (obj->Momentum));
-        oldMomentum = obj->Momentum;
     }
 
     if ((obj->Location).y > BREAKOUT_BoxHeight)

breakout.h

@@ -40,6 +40,8 @@ void BALL_Draw(SDL_Renderer * renderer, Ball * obj);
 bool BALL_CollideWithRect(Ball * obj, SDL_Rect * rect);
 bool RECT_Collide(SDL_Rect * rect1, SDL_Rect * rect2);
 void BALL_SteerMomentum(Ball * obj, Paddle * paddle);
+void RECT_SetTargetPos(SDL_Rect * rect, Vector * Location);
+SDL_Point BALL_GetCenter(Ball * obj);
 void BALL_Update(Ball * obj, Paddle * paddle);
 void BALL_DestroyObject(Ball * obj);
 void BALL_Deinitialize();