WrapBlit x and y reversed - VERGE, Free 2d Game Engine

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WrapBlit x and y reversed

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geronimo	WrapBlit seems to have its X and Y reversed. ^^ Posted on 2004-04-15 09:42:53
vecna	ack dblpost Posted on 2004-04-15 13:01:35 (last edited on 2004-04-15 13:02:01)
vecna	Hmm. Doesnt seem like it to me. Doublecheck it, if it still seems reversed, try to send me some code demonstrating the problem, but a simple test seems to work fine. Posted on 2004-04-15 13:01:36
geronimo	Just doublechecked, and here's the code. The snippet is pulled from a while loop. I figure if X is being decremented and Y is being incremented the background should scroll Left and Down. But left as shown below, it scrolls to the Right and Up. WrapBlit(x,y,optbg,screen); x--; y++; if(y==128) { x=0; y=0; } optbg image size: 384x256 verge resolution setting: 320x240 Posted on 2004-04-16 01:34:01
vecna	Oh. well, you could consider positive and negative reversed... ^_^ If you do a wrapblit with only x moving or only y moving, you'll see that x and y are correct. However, the x and y arguements are 'offsets to the texture' rather than 'coordinates to the image', which is why it works different. Also note that you dont have to reset the x/y values. WrapBlit will ... wrap ... the texture coordinates. Which is why slapping a wrapblit(systemtime, systemtime, img, screen) makes a nice, easy effect. Posted on 2004-04-16 01:50:25
geronimo	ahhh! :D nice. Posted on 2004-04-16 03:39:23

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