RectHitSpritePixels
CollisionState = RectHitSpritePixels(X1, Y1, X2, Y2, SpriteIndex, Accuracy#)
 
Parameters:

    X1 = The top left X coordinate of the rectangle
    Y1 = The top left Y coordinate of the rectangle
    X2 = The bottom right X coordinate of the rectangle
    Y2 = The bottom right Y coordinate of the rectangle
    SpriteIndex = The Sprite to check for collision against
    Accuracy# = The level of accuracy that should be used.
Returns:

    CollisionState = The result of the collision query (0= No collision ,1 = Collision)
 

      The RectHitSpritePixels function detects if a collision occurs between a rectangle and the solid pixels (none transparent) of a sprite.


Example Accuracy Values
      0.25 = Reduce collision accuracy to 25%
      0.50 = Reduce collision accuracy to 50%
      0.75 = Reduce collision accuracy to 75%
      1.00 = Set collision accuracy to 100%
      2.00 = Set collision accuracy to 200%




FACTS:


      * The Accuracy parameter allows the user to fine tune the quality of the pixel level sprite collisions. Generally speaking the lower the quality the faster the comparison. On the flip side the higher the quality the more accurate, but slower the comparison. It's up to the user to choose an accuracy level that is appropriate for your images and the performance of your game.

      * Pixels level collisions ignore the sprites transparent colour.

      * See SpriteCollisionMode for more information about the available collision modes.





Mini Tutorial:


      This example creates a random image, creates 10 randomly positioned sprites on the screen using this image. The main loop rotates the sprites while scans them for collisions using RectHitSpritePixels



  
; clear the screen to black
  Cls RGB(0,0,0)
  
; Limit the frame rate to 75 or less
  SetFPS 75
  
; Make an image with circles on it
  For lp =0 To 100
     CircleC Rnd(100),Rnd(100),RndRange(2,10),1,RndRGB()
  Next
  GetImage 1,0,0,100,100
  PrepareFXImage 1
  
  
; Make 10 sprites
  For spr=1 To 10
     
   ; postion the spriote randomly on the screen
     x=Rnd(GetScreenWidth())
     y=Rnd(GetScreenHeight())
     
   ; Create the sprite using image #1
     Spr=NewSprite(x,y,1)
     
   ; center the sprite
     CenterSpriteHandle spr
     
  Next
  
  
  
  Do
     Cls RGB(0,0,0)
     
   ; Check if the mouse  is over a sprite
     x1#=MouseX()
     y1#=MouseY()
     
     x2#=x1#+100
     y2#=y1#+50
     
     
   ; start for/next loop from 1 to 10
     For spr=1 To 10
        
      ; Turn this sprite
        TurnSprite spr,0.25
        
      ; Check if a Rectangle hits any pixels in this sprite
        If RectHitSpritePixels(x1#,y1#,x2#,y2#,spr,1)=true
         ; if the mouse pointer over sprite
         ; then make it flash
           SpriteDrawMode Spr,2+4096
        Else
         ; Set it's draw mode to just rotated
           SpriteDrawMode Spr,2
        EndIf
        
     Next
     
     
     DrawAllSprites
     
   ; draw the test point
     BoxC x1#,y1#,x2#,y2#,false,RGB(255,255,255)
     
     
     Sync
  Loop
  





 
Related Info: CircleHitSprite | PointHitSprite | PointHitSpritePixels | QuadHitSprite | RayHitSprite | RectHitSprite | ShapeHitSprite | ShapeHitSpritePixels | SpriteCollisionMode | SpriteHit | SpritesOverlap | TriangleHitSpritePixels :
 


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