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35 行
1.3 KiB
35 行
1.3 KiB
#ifndef __LIGHTCULLUTILS_H__
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#define __LIGHTCULLUTILS_H__
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// Used to index into our SFiniteLightBound (g_data) and
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// LightVolumeData (_LightVolumeData) buffers.
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int GenerateLightCullDataIndex(int lightIndex, uint numVisibleLights, uint eyeIndex)
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{
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// For monoscopic, there is just one set of light cull data structs.
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// In stereo, all of the left eye structs are first, followed by the right eye structs.
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const int perEyeBaseIndex = (int)eyeIndex * (int)numVisibleLights;
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return (perEyeBaseIndex + lightIndex);
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}
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struct ScreenSpaceBoundsIndices
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{
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int min;
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int max;
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};
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// The returned values are used to index into our AABB screen space bounding box buffer
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// Usually named g_vBoundsBuffer. The two values represent the min/max indices.
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ScreenSpaceBoundsIndices GenerateScreenSpaceBoundsIndices(int lightIndex, uint numVisibleLights, uint eyeIndex)
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{
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// In the monoscopic mode, there is one set of bounds (min,max -> 2 * g_iNrVisibLights)
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// In stereo, there are two sets of bounds (leftMin, leftMax, rightMin, rightMax -> 4 * g_iNrVisibLights)
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const int eyeRelativeBase = (int)eyeIndex * 2 * (int)numVisibleLights;
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ScreenSpaceBoundsIndices indices;
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indices.min = eyeRelativeBase + lightIndex;
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indices.max = eyeRelativeBase + lightIndex + (int)numVisibleLights;
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return indices;
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}
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#endif //__LIGHTCULLUTILS_H__
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