private void RunLoadLightToBuffer(SceneParseResult sceneParseResult, ref ComputeBuffer lightInfoBuffer)
{
int numberOfLights = sceneParseResult.Lights.Count;
lightInfoBuffer = new ComputeBuffer(numberOfLights, RTLightInfo.Stride);
lightInfoBuffer.SetData(sceneParseResult.Lights);
}
private void ParseLight(
GameObject[] roots,
ref SceneParseResult sceneParseResult)
{
var lights = GetAllLights(roots);
if (!IsAllLightsDirty(lights))
{
// All the lights are unchange, no need to rebuild
return;
}
sceneParseResult.ClearAllLights();
foreach (var light in lights)
{
if (light.gameObject.activeInHierarchy)
{
sceneParseResult.AddLight(light.GetLightInfo());
}
}
// // Placeholder for scene parsing
// sceneParseResult.AddLight(new RTLightInfo(
// position: new Vector3(1, 1, 1),
// rotation: new Vector3(0, 0, -1),
// type: 0
// ));
// sceneParseResult.AddLight(new RTLightInfo(
// position: new Vector3(0, 0, 0),
// rotation: new Vector3(0, 0, 0),
// type: 1
// ));
}
private void LoadBufferWithGeometryInstances(
SceneParseResult sceneParseResult,
ref ComputeBuffer bvhBuffer,
ref ComputeBuffer primitiveBuffer,
ref ComputeBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, ComputeBuffer> gemoetryInstanceBuffers)
{
foreach (var item in gemoetryInstanceBuffers)
{
item.Value?.Release();
}
gemoetryInstanceBuffers.Clear();
var geoInsIter = sceneParseResult.GeometryInstances.GetEnumerator();
while (geoInsIter.MoveNext())
{
var buffer = new ComputeBuffer(sceneParseResult.GetGeometryInstancesCount(geoInsIter.Current.Key),
sceneParseResult.GetGeometryInstancesStride(geoInsIter.Current.Key));
buffer.SetData(geoInsIter.Current.Value);
gemoetryInstanceBuffers.Add(geoInsIter.Current.Key, buffer);
}
sceneParseResult.TopLevelBVH.Flatten(
scenePrimitives: sceneParseResult.Primitives,
flatten: out List <RTBoundingBox> flattenBVH,
reorderedPrimitives: out List <Primitive> reorderedPrimitives);
bvhBuffer = new ComputeBuffer(flattenBVH.Count, RTBoundingBox.stride);
bvhBuffer.SetData(flattenBVH);
primitiveBuffer = new ComputeBuffer(reorderedPrimitives.Count, Primitive.GetStride());
primitiveBuffer.SetData(reorderedPrimitives);
worldToPrimitiveBuffer = new ComputeBuffer(reorderedPrimitives.Count, sizeof(float) * 16);
worldToPrimitiveBuffer.SetData(sceneParseResult.WorldToPrimitive);
}
private void RunLoadMaterialToBuffer(SceneParseResult sceneParseResult,
ref ComputeShader mainShader)
{
SceneTextureCollection sceneTexture = new SceneTextureCollection();
PipelineMaterialToBuffer.MaterialsToBuffer(sceneParseResult.Materials,
ref mainShader,
ref sceneTexture);
PipelineMaterialToBuffer.LoadTextureToBuffer(sceneTexture, ref mainShader);
}
private void RunLoadMaterialToBuffer(List <ComputeBuffer> computeShadersForMaterials,
SceneParseResult sceneParseResult,
ref ComputeShader mainShader)
{
sceneParseResult.ClearAllMaterials();
PipelineMaterialToBuffer.MaterialsToBuffer(computeShadersForMaterials,
sceneParseResult,
ref mainShader);
PipelineMaterialToBuffer.LoadTextureToBuffer(sceneParseResult, ref mainShader);
}
private void RunLoadGeometryToBuffer(
SceneParseResult sceneParseResult,
ref ComputeBuffer bvhBuffer,
ref ComputeShader mainShader,
ref ComputeBuffer primitiveBuffer,
ref ComputeBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, ComputeBuffer> gemoetryInstanceBuffers)
{
LoadBufferWithGeometryInstances(
sceneParseResult,
bvhBuffer: ref bvhBuffer,
primitiveBuffer: ref primitiveBuffer,
worldToPrimitiveBuffer: ref worldToPrimitiveBuffer,
gemoetryInstanceBuffers: ref gemoetryInstanceBuffers);
}
private void RunLoadGeometryToBuffer(SceneParseResult sceneParseResult,
ref TopLevelAccelerationBuffer topLevelAcc,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryBuffer> objectLvAccGeoBuffers,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryMappingCollectionBuffer> objectLvAccGeoMapBuffers,
ref PrimitiveBuffer primitiveBuffer,
ref WorldToLocalBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, GeometryInstanceBuffer> gemoetryInstanceBuffers,
ref TopLevelAccelerationGeometryMappingCollectionBuffer topLevelAccGeoMap)
{
LoadBufferWithGeometryInstances(sceneParseResult,
bvhBuffer: ref topLevelAcc,
objectLvAccGeoBuffers: ref objectLvAccGeoBuffers,
objectLvAccGeoMapBuffers: ref objectLvAccGeoMapBuffers,
primitiveBuffer: ref primitiveBuffer,
worldToPrimitiveBuffer: ref worldToPrimitiveBuffer,
gemoetryInstanceBuffers: ref gemoetryInstanceBuffers,
topLevelAccGeoMapColBuffer: ref topLevelAccGeoMap);
}
private void ParseLight(ref SceneParseResult sceneParseResult)
{
sceneParseResult.ClearAllLights();
// Placeholder for scene parsing
sceneParseResult.AddLight(new RTLightInfo(
instance: 0,
position: new Vector3(1, 1, 1),
rotation: new Vector3(0, 0, -1),
type: 0
));
sceneParseResult.AddLight(new RTLightInfo(
instance: 0,
position: new Vector3(0, 0, 0),
rotation: new Vector3(0, 0, 0),
type: 1
));
}
private void RunParseScene()
{
var scene = SceneManager.GetActiveScene();
sceneParseResult = SceneParser.Instance.ParseScene(scene);
}
private void ParseGeometry(
GameObject[] roots,
ref SceneParseResult sceneParseResult)
{
// TODO: Optimize dynamic array generation
sceneParseResult.ClearAllPrimitives();
sceneParseResult.ClearAllGeometries();
sceneParseResult.ClearAllMaterials();
sceneParseResult.ClearTopLevelBVH();
foreach (var root in roots)
{
RTRenderer[] renderers = root.GetComponentsInChildren <RTRenderer>();
foreach (var renderer in renderers)
{
if (renderer.gameObject.activeSelf)
{
List <float> geoInsData = renderer.geometry.GetGeometryInstanceData();
var closestShaderGUID = renderer.material.GetClosestHitGUID();
int closestShaderIndex = CustomShaderDatabase.Instance.GUIDToShaderIndex(closestShaderGUID, EShaderType.ClosestHit);
var intersectShaderGUID = renderer.geometry.GetIntersectShaderGUID();
int intersectShaderIndex = CustomShaderDatabase.Instance.GUIDToShaderIndex(intersectShaderGUID, EShaderType.Intersect);
RTMaterial material = renderer.material;
if (geoInsData == null || material == null)
{
continue;
}
if (!sceneParseResult.GeometryStride.ContainsKey(intersectShaderIndex))
{
sceneParseResult.GeometryStride.Add(intersectShaderIndex, renderer.geometry.GetStride());
}
sceneParseResult.AddGeometryData(
geometryData: geoInsData,
intersectIndex: intersectShaderIndex
);
int startIndex = sceneParseResult.AddGeometryCount(
count: renderer.geometry.GetCount(),
intersectIndex: intersectShaderIndex
);
sceneParseResult.AddWorldToPrimitive(renderer.gameObject.transform.worldToLocalMatrix);
sceneParseResult.AddPrimitive(new Primitive(
geometryIndex: intersectShaderIndex,
geometryInstanceBegin: startIndex,
geometryInstanceCount: renderer.geometry.GetCount(),
materialIndex: closestShaderIndex,
transformIndex: sceneParseResult.WorldToPrimitive.Count - 1
));
var boxOfThisObject = renderer.geometry.GetBoundingBox();
sceneParseResult.AddBoundingBox(new RTBoundingBox(
max: boxOfThisObject.max,
min: boxOfThisObject.min,
primitive: sceneParseResult.Primitives.Count - 1
));
sceneParseResult.AddMaterial(material);
}
}
}
}
private SceneParser()
{
sceneParseResult = new SceneParseResult();
}
private void ParseGeometry(
GameObject[] roots,
ref SceneParseResult sceneParseResult)
{
var renderers = GetAllRenderers(roots);
if (!IsAllGeometriesDirty(renderers) && sceneParseResult.Primitives.Count != 0)
{
// All the geometries are unchange, no need to rebuild
return;
}
// TODO: Optimize dynamic array generation
sceneParseResult.ClearAllPrimitives();
sceneParseResult.ClearAllGeometries();
sceneParseResult.ClearAllMaterials();
sceneParseResult.ClearTopLevelBVH();
foreach (var renderer in renderers)
{
if (renderer.gameObject.activeInHierarchy)
{
RTMaterial material = renderer.material;
if (renderer.geometry == null || !renderer.geometry.IsGeometryValid() || material == null)
{
continue;
}
var closestShaderGUID = renderer.material.GetClosestHitGUID();
int closestShaderIndex = CustomShaderDatabase.Instance.GUIDToShaderIndex(closestShaderGUID, EShaderType.ClosestHit);
var intersectShaderGUID = renderer.geometry.GetIntersectShaderGUID();
int intersectShaderIndex = CustomShaderDatabase.Instance.GUIDToShaderIndex(intersectShaderGUID, EShaderType.Intersect);
if (!sceneParseResult.GeometryStride.ContainsKey(intersectShaderIndex))
{
sceneParseResult.GeometryStride.Add(intersectShaderIndex, renderer.geometry.IsAccelerationStructure() ? 0 : renderer.geometry.GetStride());
}
if (renderer.geometry.IsAccelerationStructure())
{
// Such as Low-Level BVH (RTMeshBVH)
int mapOffset = sceneParseResult.ObjectLevelAccGeoMapCursor(intersectShaderIndex);
int geoOffset = sceneParseResult.ObjectLevelAccGeoCursor(intersectShaderIndex);
((IRTMeshBVH)(renderer.geometry)).BuildBVHAndTriangleList(geoLocalToGlobalIndexOffset: geoOffset,
mappingLocalToGlobalIndexOffset: mapOffset);
List <float> geoInsData = renderer.geometry.GetGeometryInstanceData(geoLocalToGlobalIndexOffset: geoOffset,
mappingLocalToGlobalIndexOffset: mapOffset);
sceneParseResult.AddAccelerationStructureGeometry(
accelerationStructureData: geoInsData,
accelGeometryMapping: renderer.geometry.GetAccelerationStructureGeometryMapping(geoLocalToGlobalIndexOffset: geoOffset,
mappingLocalToGlobalIndexOffset: mapOffset),
accelGeometryData: renderer.geometry.GetAccelerationStructureGeometryData(geoLocalToGlobalIndexOffset: geoOffset,
mappingLocalToGlobalIndexOffset: mapOffset),
intersectIndex: intersectShaderIndex
);
}
else
{
// Standardized Geometry (Sphere, Triangle)
List <float> geoInsData = renderer.geometry.GetGeometryInstanceData(geoLocalToGlobalIndexOffset: 0, mappingLocalToGlobalIndexOffset: 0); // No offset
sceneParseResult.AddGeometryData(
geometryData: geoInsData,
intersectIndex: intersectShaderIndex
);
}
int startIndex = sceneParseResult.AddGeometryCount(
count: renderer.geometry.GetCount(),
intersectIndex: intersectShaderIndex
);
int materialInstanceIndex = sceneParseResult.AddMaterial(material);
sceneParseResult.AddWorldToPrimitive(renderer.gameObject.transform.worldToLocalMatrix);
sceneParseResult.AddPrimitive(new Primitive(
geometryIndex: intersectShaderIndex,
geometryInstanceBegin: startIndex,
geometryInstanceCount: renderer.geometry.GetCount(),
materialIndex: closestShaderIndex,
materialInstanceIndex: materialInstanceIndex,
transformIndex: sceneParseResult.WorldToPrimitive.Count - 1
));
var boxOfThisObject = renderer.geometry.GetTopLevelBoundingBox(assginedPrimitiveId: sceneParseResult.Primitives.Count - 1);
sceneParseResult.AddBoundingBox(boxOfThisObject);
}
}
}
private void LoadBufferWithGeometryInstances(SceneParseResult sceneParseResult,
ref TopLevelAccelerationBuffer bvhBuffer,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryBuffer> objectLvAccGeoBuffers,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryMappingCollectionBuffer> objectLvAccGeoMapBuffers,
ref PrimitiveBuffer primitiveBuffer,
ref WorldToLocalBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, GeometryInstanceBuffer> gemoetryInstanceBuffers,
ref TopLevelAccelerationGeometryMappingCollectionBuffer topLevelAccGeoMapColBuffer)
{
gemoetryInstanceBuffers.Clear();
objectLvAccGeoBuffers.Clear();
objectLvAccGeoMapBuffers.Clear();
var geoInsIter = sceneParseResult.GeometryInstances.GetEnumerator();
while (geoInsIter.MoveNext())
{
var buffer = new GeometryInstanceBuffer(sceneParseResult.GetGeometryInstancesCount(geoInsIter.Current.Key), sceneParseResult.GetGeometryInstancesStride(geoInsIter.Current.Key));
buffer.SetData(geoInsIter.Current.Value);
gemoetryInstanceBuffers.Add(geoInsIter.Current.Key, buffer);
}
var objectLevelAccGeoIter = sceneParseResult.ObjectLevelAccelerationGeometries.GetEnumerator();
while (objectLevelAccGeoIter.MoveNext())
{
var buffer = new ObjectLevelAccelerationGeometryBuffer(objectLevelAccGeoIter.Current.Value.Count, sizeof(float));
buffer.SetData(objectLevelAccGeoIter.Current.Value);
objectLvAccGeoBuffers.Add(objectLevelAccGeoIter.Current.Key, buffer);
}
var objectLvAccGeoMapIter = sceneParseResult.ObjectLevelAccelerationGeometryMapping.GetEnumerator();
while (objectLvAccGeoMapIter.MoveNext())
{
var buffer = new ObjectLevelAccelerationGeometryMappingCollectionBuffer(objectLvAccGeoMapIter.Current.Value.Count, sizeof(int));
buffer.SetData(objectLvAccGeoMapIter.Current.Value);
objectLvAccGeoMapBuffers.Add(objectLvAccGeoMapIter.Current.Key, buffer);
}
var objectLevelAccStrInsIter = sceneParseResult.ObjectLevelAccelerationStructures.GetEnumerator();
while (objectLevelAccStrInsIter.MoveNext())
{
var buffer = new GeometryInstanceBuffer(objectLevelAccStrInsIter.Current.Value.Count, sizeof(float));
buffer.SetData(objectLevelAccStrInsIter.Current.Value);
gemoetryInstanceBuffers.Add(objectLevelAccStrInsIter.Current.Key, buffer);
}
sceneParseResult.TopLevelBVH.Flatten(
flatten: out List <RTBoundingBoxToGPU> _flattenBVH,
accelerationGeometryMapping: out List <int> _topLevelAccelerationGeometryMapping);
bvhBuffer = new TopLevelAccelerationBuffer(_flattenBVH.Count, RTBoundingBox.stride);
bvhBuffer.SetData(_flattenBVH);
primitiveBuffer = new PrimitiveBuffer(sceneParseResult.Primitives.Count, Primitive.GetStride());
primitiveBuffer.SetData(sceneParseResult.Primitives);
topLevelAccGeoMapColBuffer = new TopLevelAccelerationGeometryMappingCollectionBuffer(_topLevelAccelerationGeometryMapping.Count, sizeof(int));
topLevelAccGeoMapColBuffer.SetData(_topLevelAccelerationGeometryMapping);
worldToPrimitiveBuffer = new WorldToLocalBuffer(sceneParseResult.WorldToPrimitive.Count, sizeof(float) * 16);
worldToPrimitiveBuffer.SetData(sceneParseResult.WorldToPrimitive);
}