remove redundant code

lesson#29 - Player spritesheet animation/ourGame/source/game/animation/animation.d

@@ -11,7 +11,6 @@ struct Animation {
         float frameTimeSecs;
         float frameTimeSecsLeft;
         bool isActive;
-        bool flip;
     }
 
     this(in Texture2D texture, in int numFrames, in int numRows, in float frameTimeSecs, in int useRow = 1, in bool flip = false) {
@@ -21,13 +20,12 @@ struct Animation {
         this.frameTimeSecsLeft = frameTimeSecs;
         this.currentFrame = 0;
         this.isActive = true;
-        this.flip = flip;
 
         // create rectangle frames
         immutable frameWidth = texture.width / numFrames;
         immutable frameHeight = texture.height / numRows;
         foreach(i; 0 .. numFrames) {
-            this.rectFrames ~= Rectangle(i * frameWidth, (useRow - 1) * frameHeight, frameWidth, frameHeight);
+            this.rectFrames ~= Rectangle(i * frameWidth, (useRow - 1) * frameHeight, flip ? -frameWidth : frameWidth, frameHeight);
         }
     }
     
@@ -57,19 +55,8 @@ struct Animation {
     }
 
     void draw(in Vector2 position) {
-        if (flip) {
-            DrawTextureRec(texture, 
-                Rectangle(
-                    rectFrames[currentFrame].x, 
-                    rectFrames[currentFrame].y, 
-                    -rectFrames[currentFrame].width, 
-                    rectFrames[currentFrame].height
-                ), 
-            position, Colors.WHITE);
-        } else {
         DrawTextureRec(texture, rectFrames[currentFrame], position, Colors.WHITE);
     }
-    }
 }