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WOsborn

fx shader custom struct arrays

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Im looking at having a custom struct in my .fx file that looks something like this. With an array to hold N lights. // Inside an .fx file //// struct light_point { float range; float3 position; float3 color; }; light_point lights[N]; How do I go about setting N based off the number of lights I collect at render time, which would be dynamic based on the objects being rendered location and the number of lights in range, and how would I fill those structs with information from my c++ structs? I havent attempted this yet so the layout might be totally wrong.

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Is there any way of doing something like this?
Would I need a set number of items in the array, instead of N make it 8?
So how is dynamic lighting done in a game level?

Maybe send in array of float4s that the shader would know how to unload?
Something like this, for every light send 2 float4s and an int to secify
number of lights?

//light1
float4(pos.x,pos.y,pos.z,range);
float4(color.r,color.g,color.b, intensity);
//light2
float4(pos.x,.....

[Edited by - WOsborn on June 13, 2006 10:06:01 AM]

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