public override void ProcessShadowRequests(FrameId frameId, CullResults cullResults, Camera camera, VisibleLight[] lights, ref uint shadowRequestsCount, int[] shadowRequests, out int[] shadowDataIndices)
{
shadowDataIndices = null;
// TODO:
// Cached the cullResults here so we don't need to pass them around.
// Allocate needs to pass them to the shadowmaps, as the ShadowUtil functions calculating view/proj matrices need them to call into C++ land.
// Ideally we can get rid of that at some point, then we wouldn't need to cache them here, anymore.
foreach (var sm in m_Shadowmaps)
{
sm.Assign(cullResults);
}
if (shadowRequestsCount == 0 || lights == null || shadowRequests == null)
{
shadowRequestsCount = 0;
return;
}
// first sort the shadow casters according to some priority
PrioritizeShadowCasters(camera, lights, shadowRequestsCount, shadowRequests);
// next prune them based on some logic
VectorArray <int> requestedShadows = new VectorArray <int>(shadowRequests, 0, shadowRequestsCount, false);
m_TmpRequests.Reset(shadowRequestsCount);
uint totalGranted;
PruneShadowCasters(camera, lights, ref requestedShadows, ref m_TmpRequests, out totalGranted);
// if there are no shadow casters at this point -> bail
if (totalGranted == 0)
{
shadowRequestsCount = 0;
return;
}
// TODO: Now would be a good time to kick off the culling jobs for the granted requests - but there's no way to control that at the moment.
// finally go over the lights deemed shadow casters and try to fit them into the shadow map
// shadowmap allocation must succeed at this point.
m_ShadowCtxt.ClearData();
ShadowDataVector shadowVector = m_ShadowCtxt.shadowDatas;
ShadowPayloadVector payloadVector = m_ShadowCtxt.payloads;
m_ShadowIndices.Reset(m_TmpRequests.Count());
AllocateShadows(frameId, lights, totalGranted, ref m_TmpRequests, ref m_ShadowIndices, ref shadowVector, ref payloadVector);
Debug.Assert(m_TmpRequests.Count() == m_ShadowIndices.Count());
m_ShadowCtxt.shadowDatas = shadowVector;
m_ShadowCtxt.payloads = payloadVector;
// and set the output parameters
uint offset;
shadowDataIndices = m_ShadowIndices.AsArray(out offset, out shadowRequestsCount);
}
protected override void AllocateShadows(FrameId frameId, VisibleLight[] lights, uint totalGranted, ref ShadowRequestVector grantedRequests, ref ShadowIndicesVector shadowIndices, ref ShadowDataVector shadowDatas, ref ShadowPayloadVector shadowmapPayload)
{
ShadowData sd = new ShadowData();
shadowDatas.Reserve(totalGranted);
shadowIndices.Reserve(grantedRequests.Count());
for (uint i = 0, cnt = grantedRequests.Count(); i < cnt; ++i)
{
VisibleLight vl = lights[grantedRequests[i].index];
Light l = vl.light;
AdditionalLightData ald = l.GetComponent <AdditionalLightData>();
// set light specific values that are not related to the shadowmap
GPUShadowType shadowtype;
ShadowUtils.MapLightType(ald.archetype, vl.lightType, out sd.lightType, out shadowtype);
sd.bias = l.shadowBias;
sd.quality = 0;
shadowIndices.AddUnchecked((int)shadowDatas.Count());
int smidx = 0;
while (smidx < k_MaxShadowmapPerType)
{
if (m_ShadowmapsPerType[(int)shadowtype, smidx].Reserve(frameId, ref sd, grantedRequests[i], (uint)ald.shadowResolution, (uint)ald.shadowResolution, ref shadowDatas, ref shadowmapPayload, lights))
{
break;
}
smidx++;
}
if (smidx == k_MaxShadowmapPerType)
{
throw new ArgumentException("The requested shadows do not fit into any shadowmap.");
}
}
// final step for shadowmaps that only gather data during the previous loop and do the actual allocation once they have all the data.
foreach (var sm in m_Shadowmaps)
{
if (!sm.ReserveFinalize(frameId, ref shadowDatas, ref shadowmapPayload))
{
throw new ArgumentException("Shadow allocation failed in the ReserveFinalize step.");
}
}
}
