public bool Setup(ref RenderingData renderingData)
{
using var profScope = new ProfilingScope(null, m_ProfilingSetupSampler);
if (!renderingData.shadowData.supportsMainLightShadows)
{
return(false);
}
Clear();
int shadowLightIndex = renderingData.lightData.mainLightIndex;
if (shadowLightIndex == -1)
{
return(false);
}
VisibleLight shadowLight = renderingData.lightData.visibleLights[shadowLightIndex];
Light light = shadowLight.light;
if (light.shadows == LightShadows.None)
{
return(false);
}
if (shadowLight.lightType != LightType.Directional)
{
Debug.LogWarning("Only directional lights are supported as main light.");
}
Bounds bounds;
if (!renderingData.cullResults.GetShadowCasterBounds(shadowLightIndex, out bounds))
{
return(false);
}
m_ShadowCasterCascadesCount = renderingData.shadowData.mainLightShadowCascadesCount;
int shadowResolution = ShadowUtils.GetMaxTileResolutionInAtlas(renderingData.shadowData.mainLightShadowmapWidth,
renderingData.shadowData.mainLightShadowmapHeight, m_ShadowCasterCascadesCount);
m_ShadowmapWidth = renderingData.shadowData.mainLightShadowmapWidth;
m_ShadowmapHeight = (m_ShadowCasterCascadesCount == 2) ?
renderingData.shadowData.mainLightShadowmapHeight >> 1 :
renderingData.shadowData.mainLightShadowmapHeight;
for (int cascadeIndex = 0; cascadeIndex < m_ShadowCasterCascadesCount; ++cascadeIndex)
{
bool success = ShadowUtils.ExtractDirectionalLightMatrix(ref renderingData.cullResults, ref renderingData.shadowData,
shadowLightIndex, cascadeIndex, m_ShadowmapWidth, m_ShadowmapHeight, shadowResolution, light.shadowNearPlane,
out m_CascadeSplitDistances[cascadeIndex], out m_CascadeSlices[cascadeIndex]);
if (!success)
{
return(false);
}
}
m_MainLightShadowParams = ShadowUtils.GetMainLightShadowParams(ref renderingData);
return(true);
}