Tile Map Flicker

BlitzMax Forums/BlitzMax Programming/Tile Map Flicker

Qweeg (Posted 2005) [#1]

I have a very large image that I am using as a side scrolling background. Because of its size I have split it into smaller 256*256 images. Then I draw each of the images to the screen in their positions. Each loop I then move all of the tiles slightly to the left thus getting a scrolling background. The problem is that the vertical "join between the tiles is visible as an imperfection on some screens and a Black flickering vertical line on others. Has anyone come across this before and if so is there some obvious reason for this that I am missing? Many thanks, Tim

Scott Shaver (Posted 2005) [#2]

are you using floating point values for place the images? That might account for it. For instance if the x location is getting rounded and therefore not on the correct pixel. Just a guess.

Qweeg (Posted 2005) [#3]

Brill! Thanks Scott - think you hit the nail on the head. I was using floating points and rejigging the code to use integers instead seems to have done the trick