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Code Snippets > Collisions and Physics ( Created 04 April 2012 | Last Edited 04 April 2012) Pixel Perfect Collision by melmantheman | No Votes Helps to make pixel perfect(accurate down to a pixel) collisions using image RGB values and Written in Java //this is a method /* * Tells whether or not you can move in the given direction * @param dir the direction you are moving. 0 = up -> clockwise */ public boolean canMove(int dir) { try { if(dir ==0)//up { int clr = collide.getRGB(pX+(bgx*-1)+15,pY+1); if(clr == -65536) return false; } else if(dir == 2)//down { int clr = collide.getRGB(pX+(bgx*-1)+15,pY+30); if(clr == -65536) return false; } else if(dir == 3)//left { int clr = collide.getRGB(pX+(bgx * -1)-1,pY+15); if(clr == -65536) return false; } else if(dir == 1)//right { int clr = collide.getRGB(pX+(bgx * -1)+31,pY+15); if(clr == -65536 ) return false; } } catch(Exception e){e.printStackTrace();} return true; } --> Were as: *collide is image for collision *clr is int value for pixel; *pX is player's x coordinate *bgx is the backgrounds location relative to the player or (0,0) *pY is player's y coordinate How it works: You have a background Image that is a picture of the landscape your going to be playing on, Then you have a near identical picture that is all the collide-able spots on the level colored red. clr is the pixel at the players location (shifted to a side of the player [u/d/l/r]). If that pixel the player is touching is -65536 (the color red) than the player cannot move any further in that direction. There are no comments for this entry.

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