sh0dan // VoxPod

Sunday, April 10, 2005

Nuts and Bolts

I finally found a little time this weekend for my little project. Not much, but I got around trying to fix some of the bugs I've discovered. Mainly the skew function is giving me headaches. I noticed that the old implementation caused distortions along the triangle edge.

The image is drawn using two triangles. When I moved one of the corners it resulted in artifacts along the edge. My first idea was to draw four triangles instead and include a center coordinate. That went rather smooth and actually resulted in some nicer looking code.

My second problem was - that this didn't solve the first problem. ;) So after playing a bit around I thought I'd have to move the center point to avoid the artifacts. Actually I started by moving the UV coodinate of the center point, but that still resulted in artifacts - so I moved on to actually move the vertice itself. It helped a bit, but I'm still far for satisfied with the result.

A bit frustrated I moved on to something simpler. Implementing textboxes that show the selected values selected by this sliders. Thank god that went without problems, so now I'll go to sleep, having actually achieved some kind of progress on the app. Here is a screenie:


  • Not to troll, here's an interesting read on the nuts and bolts of Apples Core Image Technology:

    I thought you might find bits and pieces interesting. Check out the section on Image Units.

    By Anonymous Anonymous, at 10:48 pm  

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