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Re: Trails ...
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Re: Trails ...


On Nov 29, 2007, at Nov 29, 2007 | 1:15 PM, Alexandre Van de Sande wrote:

do you have a picture of a ball moving on the screen with qc or do you
have a movie of a moving ball?


The former... although I'd like it if this would work with any image.

What I really want, from an algorithmic standpoint, is to be able to take any source image, delay it, filter it, and recombine it with the existing image.
I figure that if I can reduce the alpha in the filter section, then I could control the lifetime of the trails.

In the example of the ball, I might have a sprite generating the image of the ball, and LFOs modulating the X and Y coordinates so that it moves around on the screen.

Thanks
J




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References: 


 >OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Raphael Sebbe@Google <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Pierre-Olivier Latour <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: "Raphael Sebbe" <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: "Raphael Sebbe" <email@hidden>)


 >Re: OpenGL error on first rendering in -[QCOpenGLContext	willPushRenderState:] (From: Pierre-Olivier Latour <email@hidden>)


 >Trails ... (From: Jack Hayward <email@hidden>)


 >Re: Trails ... (From: "Alexandre Van de Sande" <email@hidden>)























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