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DarkBASIC Professional Discussion / Different shader values for multiple objects

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TuPP3
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Posted: 24th Feb 2011 17:45 Edited at: 24th Feb 2011 17:46
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How can I use different shader values for multiple objects? I have many types of glass, and some of them reflect light more than others, but I don't want to create new .fx shader file with different reflection values for every object.

Problem is that I know only how to change settings globally, but I don't know how to change shader variables for each object, or is it even possible?
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Blobby 101
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Posted: 24th Feb 2011 17:51
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I think if you just load the shader multiple times as different shader numbers, then you could each version different values using "Set effect constant vector" and "Set effect constant float"

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TuPP3
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Posted: 24th Feb 2011 17:57 Edited at: 24th Feb 2011 17:57
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Oh, how I didn't think of that? Seems okay solution if it is not possible to change settings of the shader for multiple objects, I mean that loading the same shader again takes some memory space.

I guess it might be slower to use different settings in one shader than use another shader for every object...
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Blobby 101
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Posted: 24th Feb 2011 18:04
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Yeah, i'm not sure TBH - the other only way I could think is to duplicate the shader's HLSL INSIDE the shader file and change the names of the tweaks and texture paths for each instance, though I imagine it'd have a similar memory usage.

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