public void SetupPerObjectLightIndices(ref CullResults cullResults, ref LightData lightData)
{
if (lightData.additionalLightsCount == 0)
{
return;
}
List <VisibleLight> visibleLights = lightData.visibleLights;
int[] perObjectLightIndexMap = cullResults.GetLightIndexMap();
int directionalLightsCount = 0;
int additionalLightsCount = 0;
// Disable all directional lights from the perobject light indices
// Pipeline handles them globally.
for (int i = 0; i < visibleLights.Count; ++i)
{
if (additionalLightsCount >= maxVisibleAdditionalLights)
{
break;
}
VisibleLight light = visibleLights[i];
if (light.lightType == LightType.Directional)
{
perObjectLightIndexMap[i] = -1;
++directionalLightsCount;
}
else
{
perObjectLightIndexMap[i] -= directionalLightsCount;
++additionalLightsCount;
}
}
// Disable all remaining lights we cannot fit into the global light buffer.
for (int i = directionalLightsCount + additionalLightsCount; i < visibleLights.Count; ++i)
{
perObjectLightIndexMap[i] = -1;
}
cullResults.SetLightIndexMap(perObjectLightIndexMap);
// if not using a compute buffer, engine will set indices in 2 vec4 constants
// unity_4LightIndices0 and unity_4LightIndices1
if (useStructuredBufferForLights)
{
int lightIndicesCount = cullResults.GetLightIndicesCount();
if (lightIndicesCount > 0)
{
if (perObjectLightIndices == null)
{
perObjectLightIndices = new ComputeBuffer(lightIndicesCount, sizeof(int));
}
else if (perObjectLightIndices.count < lightIndicesCount)
{
perObjectLightIndices.Release();
perObjectLightIndices = new ComputeBuffer(lightIndicesCount, sizeof(int));
}
cullResults.FillLightIndices(perObjectLightIndices);
}
}
}
private void SetupShaderLightListConstants(VisibleLight[] lights, ref LightData lightData, ref ScriptableRenderContext context)
{
int maxLights = Math.Min(kMaxVisibleLights, lights.Length);
for (int i = 0; i < maxLights; ++i)
{
VisibleLight currLight = lights [i];
if (currLight.lightType == LightType.Directional)
{
Vector4 dir = -currLight.localToWorld.GetColumn(2);
m_LightPositions [i] = new Vector4(dir.x, dir.y, dir.z, 0.0f);
}
else
{
Vector4 pos = currLight.localToWorld.GetColumn(3);
m_LightPositions [i] = new Vector4(pos.x, pos.y, pos.z, 1.0f);
}
m_LightColors[i] = currLight.finalColor;
float rangeSq = currLight.range * currLight.range;
float quadAtten = (currLight.lightType == LightType.Directional) ? 0.0f : 25.0f / rangeSq;
if (currLight.lightType == LightType.Spot)
{
Vector4 dir = currLight.localToWorld.GetColumn(2);
m_LightSpotDirections [i] = new Vector4(-dir.x, -dir.y, -dir.z, 0.0f);
float spotAngle = Mathf.Deg2Rad * currLight.spotAngle;
float cosOuterAngle = Mathf.Cos(spotAngle * 0.5f);
float cosInneAngle = Mathf.Cos(spotAngle * 0.25f);
float angleRange = cosInneAngle - cosOuterAngle;
m_LightAttenuations [i] = new Vector4(cosOuterAngle,
Mathf.Approximately(angleRange, 0.0f) ? 1.0f : angleRange, quadAtten, rangeSq);
}
else
{
m_LightSpotDirections [i] = new Vector4(0.0f, 0.0f, 1.0f, 0.0f);
m_LightAttenuations [i] = new Vector4(-1.0f, 1.0f, quadAtten, rangeSq);
}
}
// Lightweight pipeline only upload kMaxVisibleLights to shader cbuffer.
// We tell the pipe to disable remaining lights by setting it to -1.
int[] lightIndexMap = m_CullResults.GetLightIndexMap();
for (int i = kMaxVisibleLights; i < lightIndexMap.Length; ++i)
{
lightIndexMap[i] = -1;
}
m_CullResults.SetLightIndexMap(lightIndexMap);
CommandBuffer cmd = CommandBufferPool.Get("SetupShadowShaderConstants");
cmd.SetGlobalVector("globalLightCount", new Vector4(lightData.pixelLightsCount, lightData.vertexLightsCount, 0.0f, 0.0f));
cmd.SetGlobalVectorArray("globalLightPos", m_LightPositions);
cmd.SetGlobalVectorArray("globalLightColor", m_LightColors);
cmd.SetGlobalVectorArray("globalLightAtten", m_LightAttenuations);
cmd.SetGlobalVectorArray("globalLightSpotDir", m_LightSpotDirections);
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
void ConfigureLights()
{
mainLightExists = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f;
Vector4 shadow = Vector4.zero;
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f;
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
shadowTileCount -= 1;
}
}
else
{
visibleLightDirectionsOrPositions[i] =
light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan((46f / 64f) * outerTan));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
shadow = ConfigureShadows(i, light.light);
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
mainLightExists = false;
bool shadowmaskExists = false;
bool subtractiveLighting = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f;
Vector4 shadow = Vector4.zero;
LightBakingOutput baking = light.light.bakingOutput;
visibleLightOcclusionMasks[i] = occlusionMasks[baking.occlusionMaskChannel + 1];
if (baking.lightmapBakeType == LightmapBakeType.Mixed)
{
shadowmaskExists |=
baking.mixedLightingMode == MixedLightingMode.Shadowmask;
//subtractiveLighting |=
// baking.mixedLightingMode == MixedLightingMode.Subtractive;
if (baking.mixedLightingMode == MixedLightingMode.Subtractive)
{
subtractiveLighting = true;
cameraBuffer.SetGlobalColor(
subtractiveShadowColorId,
RenderSettings.subtractiveShadowColor.linear
);
}
}
if (light.lightType == LightType.Directional)
{
//因为要求出光源的朝向，相当于要知道光源transform.forward,矩阵第三列是光源z轴在世界坐标系下表示，也就是forward
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f;
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
shadowTileCount -= 1;
}
}
else
{
//第四列是光源原点在世界坐标系中的位置
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
attenuation.x = 1f / Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
//存储spot光源方向
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos = Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
shadow = ConfigureShadows(i, light.light);
//Light shadowLight = light.light;
//Bounds shadowBounds;
//if (shadowLight.shadows != LightShadows.None && cull.GetShadowCasterBounds(i, out shadowBounds))
//{
// shadowTileCount += 1;
// shadow.x = shadowLight.shadowStrength;
// shadow.y = shadowLight.shadows == LightShadows.Soft ? 1f : 0f;
//}
}
else
{
visibleLightSpotDirections[i] = Vector4.one;
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
bool useDistanceShadowmask =
QualitySettings.shadowmaskMode == ShadowmaskMode.DistanceShadowmask;
CoreUtils.SetKeyword(cameraBuffer, shadowmaskKeyword, shadowmaskExists && !useDistanceShadowmask);
CoreUtils.SetKeyword(
cameraBuffer, distanceShadowmaskKeyword,
shadowmaskExists && useDistanceShadowmask
);
CoreUtils.SetKeyword(cameraBuffer, subtractiveLightingKeyword, subtractiveLighting);
//如果超过maxVisibleLights数量的灯光，该脚本不会传输给Shader
//但是Unity自身可能会对超出maxVisibleLights的灯光，进行unity_4LightIndices0赋值，下标会找不到，_VisibleLightColors越界
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
mainLightExists = false;
bool shadowmaskExists = false;
bool subtractiveLighting = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f; //if no spot light, factor =1
Vector4 shadow = Vector4.zero;
//shadowmask settings
LightBakingOutput baking = light.light.bakingOutput;
visibleLightOcclusionMasks[i] =
occlusionMasks[baking.occlusionMaskChannel + 1];
if (baking.lightmapBakeType == LightmapBakeType.Mixed)
{
shadowmaskExists |=
baking.mixedLightingMode == MixedLightingMode.Shadowmask;
if (baking.mixedLightingMode == MixedLightingMode.Subtractive)
{
subtractiveLighting = true;
cameraBuffer.SetGlobalColor(
subtractiveShadowColorId,
RenderSettings.subtractiveShadowColor.linear
);
}
}
//light settings
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z; //change to vector surfaceToLight
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f;
//directional light index =0, cast shadow, use cascades
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
shadowTileCount -= 1; //cascaded shadow map is not included in tiled shadow map
}
}
else
{
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
//buffer shadowData
shadow = ConfigureShadows(i, light.light);
}
else
{
//indicator of pointlight
visibleLightSpotDirections[i] = Vector4.one;
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
//number of lights exceeds upper limit
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
//remove main light from diffuseLight render, avoid a second render
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
bool useDistanceShadowmask =
QualitySettings.shadowmaskMode == ShadowmaskMode.DistanceShadowmask;
//enable shadowmask keyword
CoreUtils.SetKeyword(cameraBuffer, shadowmaskKeyword,
shadowmaskExists && !useDistanceShadowmask); //if use shadowmask mode
CoreUtils.SetKeyword(cameraBuffer, distanceShadowmaskKeyword,
shadowmaskExists && useDistanceShadowmask); //if use distance shadowmask
CoreUtils.SetKeyword(cameraBuffer, subtractiveLightingKeyword,
subtractiveLighting);
}
// 计算光数据
void ConfigureLights()
{
mainLightExists = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
// 其他光被抛弃
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
// finalColor是光的颜色和亮度的乘积，并且已经被转换到正确的颜色空间
visibleLightColors[i] = light.finalColor;
// 点光和聚光的边界衰减
Vector4 attenuation = Vector4.zero;
// 保证计算聚光灯的边界衰减不会影响其他类型的灯
attenuation.w = 1f;
Vector4 shadow = Vector4.zero;
if (light.lightType == LightType.Directional)
{
// 获取光线方向
Vector4 v = light.localToWorld.GetColumn(2);
// shader中使用视点到光的方向，因此需要取反，w为0，不需要取反
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f; // z分量指示是否处理方向光
// 如果存在主光
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
// 层级阴影使用另一张阴影纹理
shadowTileCount -= 1;
}
}
else
{
// 获取光的位置
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
// 计算点光的边界衰减数据，放在attenuation的x分量中
attenuation.x = 1f / Mathf.Max(light.range * light.range, 0.00001f);
// 如果是聚光灯
if (light.lightType == LightType.Spot)
{
// 设定方向
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
// 计算聚光的边界衰减数据，并放在attenuation的z和w分量中
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos = Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
shadow = ConfigureShadows(i, light.light);
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
// 如果光的数量超过maxVisibleLights，将超过的灯光的索引剔除掉
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
// 获取光索引数组
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
// 将主光剔除掉，否则主光会被渲染两次
// 这也意味着每个物体支持的像素光的数量变为5
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
// 索引为-1的光会被剔除掉
lightIndices[i] = -1;
}
// 设置光索引数组
cull.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f; //if no spot light, factor =1
Vector4 shadow = Vector4.zero;
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z; //change to vector surfaceToLight
visibleLightDirectionsOrPositions[i] = v;
}
else
{
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
//buffer shadowData
Light shadowLight = light.light;
Bounds shadowBounds;
if (shadowLight.shadows != LightShadows.None &&
cull.GetShadowCasterBounds(i, out shadowBounds))
{
shadowTileCount += 1;
shadow.x = shadowLight.shadowStrength;
shadow.y = shadowLight.shadows == LightShadows.Soft ? 1f : 0f;
}
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
//number of lights exceeds upper limit
if (cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
mainLightExists = false;
bool shadowmaskExists = false;
bool subtractiveLighting = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f;
Vector4 shadow = Vector4.zero;
LightBakingOutput baking = light.light.bakingOutput;
visibleLightOcclusionMasks[i] =
occlusionMasks[baking.occlusionMaskChannel + 1];
if (baking.lightmapBakeType == LightmapBakeType.Mixed)
{
shadowmaskExists |=
baking.mixedLightingMode == MixedLightingMode.Shadowmask;
if (baking.mixedLightingMode == MixedLightingMode.Subtractive)
{
subtractiveLighting = true;
cameraBuffer.SetGlobalColor(
subtractiveShadowColorId,
RenderSettings.subtractiveShadowColor.linear
);
}
}
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f;
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
shadowTileCount -= 1;
}
}
else
{
visibleLightDirectionsOrPositions[i] =
light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan((46f / 64f) * outerTan));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
shadow = ConfigureShadows(i, light.light);
}
else
{
visibleLightSpotDirections[i] = Vector4.one;
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
bool useDistanceShadowmask =
QualitySettings.shadowmaskMode == ShadowmaskMode.DistanceShadowmask;
CoreUtils.SetKeyword(
cameraBuffer, shadowmaskKeyword,
shadowmaskExists && !useDistanceShadowmask
);
CoreUtils.SetKeyword(
cameraBuffer, distanceShadowmaskKeyword,
shadowmaskExists && useDistanceShadowmask
);
CoreUtils.SetKeyword(
cameraBuffer, subtractiveLightingKeyword, subtractiveLighting
);
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
mainLightExists = false;
shadowTileCount = 0;
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f; //if no spot light, factor =1
Vector4 shadow = Vector4.zero;
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z; //change to vector surfaceToLight
visibleLightDirectionsOrPositions[i] = v;
shadow = ConfigureShadows(i, light.light);
shadow.z = 1f;
//directional light index =0, cast shadow, use cascades
if (i == 0 && shadow.x > 0f && shadowCascades > 0)
{
mainLightExists = true;
shadowTileCount -= 1; //cascaded shadow map is not included in tiled shadow map
}
}
else
{
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
//buffer shadowData
shadow = ConfigureShadows(i, light.light);
}
}
visibleLightAttenuations[i] = attenuation;
shadowData[i] = shadow;
}
//number of lights exceeds upper limit
if (mainLightExists || cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
if (mainLightExists)
{
//remove main light from diffuseLight render, avoid a second render
lightIndices[0] = -1;
}
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
//------------------------------------------------------------------------------
private void ConfigureLights()
{
for (int i = 0; i < cullResults.visibleLights.Count; i++)
{
// might try to put more lights in the scene than supported in pipeline
if (i == maxVisibleLights)
{
Debug.LogError("Attempting to use more lights in the scene than the renderer supports. Max supported lights: " + maxVisibleLights);
break;
}
// set light color
VisibleLight light = cullResults.visibleLights[i];
visibleLightColors[i] = light.finalColor;
// set light vector, attentuation, & spotdirection
// based on light type
Vector4 a = Vector4.zero;
a.w = 1.0f;
if (light.lightType == LightType.Directional)
{
// 3rd column is z-axis of light, which is the direction it shines in
Vector4 v = light.localToWorld.GetColumn(2);
// negate so vector is pointing towards the light
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightVectors[i] = v;
}
else
{
// 3rd column is position
visibleLightVectors[i] = light.localToWorld.GetColumn(3);
a.x = 1.0f / Mathf.Max(light.range * light.range, 0.00001f);
// set direction & extra attentuation info if it's a spot light
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos = Mathf.Cos(Mathf.Atan((46.0f / 64.0f) * outerTan));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
a.z = 1.0f / angleRange;
a.w = -outerCos * a.z;
}
}
visibleLightAttenuations[i] = a;
}
// let unity know about unused lights so it doesn't write
// to out of bounds locations in light data
if (cullResults.visibleLights.Count > maxVisibleLights)
{
// allocates new memory every frame, booo
int[] lightIndices = cullResults.GetLightIndexMap();
for (int i = maxVisibleLights; i < cullResults.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cullResults.SetLightIndexMap(lightIndices);
}
}
void ConfigureLights()
{
for (int i = 0; i < cull.visibleLights.Count; i++)
{
if (i == maxVisibleLights)
{
break;
}
VisibleLight light = cull.visibleLights[i];
visibleLightColors[i] = light.finalColor;
Vector4 attenuation = Vector4.zero;
attenuation.w = 1f; //if no spot light, factor =1
if (light.lightType == LightType.Directional)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z; //change to vector surfaceToLight
visibleLightDirectionsOrPositions[i] = v;
}
else
{
visibleLightDirectionsOrPositions[i] = light.localToWorld.GetColumn(3);
attenuation.x = 1f /
Mathf.Max(light.range * light.range, 0.00001f);
if (light.lightType == LightType.Spot)
{
Vector4 v = light.localToWorld.GetColumn(2);
v.x = -v.x;
v.y = -v.y;
v.z = -v.z;
visibleLightSpotDirections[i] = v;
float outerRad = Mathf.Deg2Rad * 0.5f * light.spotAngle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos =
Mathf.Cos(Mathf.Atan(((46f / 64f) * outerTan)));
float angleRange = Mathf.Max(innerCos - outerCos, 0.001f);
attenuation.z = 1f / angleRange;
attenuation.w = -outerCos * attenuation.z;
}
}
visibleLightAttenuations[i] = attenuation;
}
//number of lights exceeds upper limit
if (cull.visibleLights.Count > maxVisibleLights)
{
int[] lightIndices = cull.GetLightIndexMap();
for (int i = maxVisibleLights; i < cull.visibleLights.Count; i++)
{
lightIndices[i] = -1;
}
cull.SetLightIndexMap(lightIndices);
}
}
