public IEnumerator ReplaceUnityTrees()
{
_isCoroutineActive = true;
if (prototypeList.Count > 0)
{
Vector4[] treeScales = new Vector4[prototypeList.Count];
int count = 0;
foreach (GPUInstancerTreePrototype tp in prototypeList)
{
treeScales[count] = tp.isApplyPrefabScale ? tp.prefabObject.transform.localScale : Vector3.one;
count++;
}
int[] instanceCounts = new int[prototypeList.Count];
List <Vector4> treeDataList = new List <Vector4>(); // prototypeIndex - positionx3 - rotation - scalex2
int instanceTotal = 0;
foreach (Terrain terrain in _terrains)
{
if (terrain == null)
{
continue;
}
if (terrain.terrainData.treePrototypes.Length > prototypeList.Count)
{
Debug.LogError("Additional Terrain has more Tree protototypes than defined prototypes on the Tree Manager. Tree Manager requires every Terrain to have the same Tree prototypes defined.", terrain);
continue;
}
terrain.treeDistance = 0f; // will not persist if called at runtime.
Vector3 terrainSize = terrain.terrainData.size;
Vector3 terrainPosition = terrain.GetPosition();
TreeInstance[] treeInstances = terrain.terrainData.treeInstances;
instanceTotal += treeInstances.Length;
foreach (TreeInstance treeInstance in treeInstances)
{
treeDataList.Add(new Vector4(
treeInstance.prototypeIndex,
treeInstance.position.x * terrainSize.x + terrainPosition.x,
treeInstance.position.y * terrainSize.y + terrainPosition.y,
treeInstance.position.z * terrainSize.z + terrainPosition.z
));
treeDataList.Add(new Vector4(
treeInstance.rotation,
treeInstance.widthScale,
treeInstance.heightScale,
0
));
instanceCounts[treeInstance.prototypeIndex]++;
}
}
if (instanceTotal > 0)
{
if (initializeWithCoroutine && !isInitialized)
{
yield return(null);
}
ComputeBuffer treeDataBuffer = new ComputeBuffer(treeDataList.Count, GPUInstancerConstants.STRIDE_SIZE_FLOAT4);
#if UNITY_2019_1_OR_NEWER
treeDataBuffer.SetData(treeDataList);
#else
treeDataBuffer.SetData(treeDataList.ToArray());
#endif
ComputeBuffer treeScalesBuffer = new ComputeBuffer(treeScales.Length, GPUInstancerConstants.STRIDE_SIZE_FLOAT4);
treeScalesBuffer.SetData(treeScales);
ComputeBuffer counterBuffer = new ComputeBuffer(1, GPUInstancerConstants.STRIDE_SIZE_INT);
uint[] emptyCounterData = new uint[1];
treeDataList = null;
treeScales = null;
GPUInstancerRuntimeData runtimeData;
for (int i = 0; i < runtimeDataList.Count; i++)
{
runtimeData = runtimeDataList[i];
int instanceCount = instanceCounts[i];
runtimeData.bufferSize = instanceCount;
runtimeData.instanceCount = instanceCount;
if (instanceCount == 0)
{
GPUInstancerUtility.ReleaseInstanceBuffers(runtimeData);
continue;
}
counterBuffer.SetData(emptyCounterData);
if (runtimeData.transformationMatrixVisibilityBuffer != null)
{
runtimeData.transformationMatrixVisibilityBuffer.Release();
}
runtimeData.transformationMatrixVisibilityBuffer = new ComputeBuffer(instanceCount, GPUInstancerConstants.STRIDE_SIZE_MATRIX4X4);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.VisibilityKernelPoperties.INSTANCE_DATA_BUFFER, runtimeData.transformationMatrixVisibilityBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.TreeKernelProperties.TREE_DATA, treeDataBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.TreeKernelProperties.TREE_SCALES, treeScalesBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.GrassKernelProperties.COUNTER_BUFFER, counterBuffer);
_treeInstantiationComputeShader.SetInt(
GPUInstancerConstants.VisibilityKernelPoperties.BUFFER_PARAMETER_BUFFER_SIZE, instanceTotal);
//_treeInstantiationComputeShader.SetVector(
// GPUInstancerConstants.GrassKernelProperties.TERRAIN_SIZE_DATA, terrain.terrainData.size);
//_treeInstantiationComputeShader.SetVector(
// GPUInstancerConstants.TreeKernelProperties.TERRAIN_POSITION, terrain.GetPosition());
_treeInstantiationComputeShader.SetBool(
GPUInstancerConstants.TreeKernelProperties.IS_APPLY_ROTATION, ((GPUInstancerTreePrototype)runtimeData.prototype).isApplyRotation);
_treeInstantiationComputeShader.SetBool(
GPUInstancerConstants.TreeKernelProperties.IS_APPLY_TERRAIN_HEIGHT, ((GPUInstancerTreePrototype)runtimeData.prototype).isApplyTerrainHeight);
_treeInstantiationComputeShader.SetInt(
GPUInstancerConstants.TreeKernelProperties.PROTOTYPE_INDEX, i);
_treeInstantiationComputeShader.Dispatch(0,
Mathf.CeilToInt(instanceTotal / GPUInstancerConstants.COMPUTE_SHADER_THREAD_COUNT), 1, 1);
GPUInstancerUtility.InitializeGPUBuffer(runtimeData);
if (initializeWithCoroutine && !isInitialized)
{
yield return(null);
}
}
treeDataBuffer.Release();
treeScalesBuffer.Release();
counterBuffer.Release();
}
else
{
GPUInstancerUtility.ReleaseInstanceBuffers(runtimeDataList);
}
}
isInitial = true;
if (!isInitialized)
{
GPUInstancerUtility.TriggerEvent(GPUInstancerEventType.TreeInitializationFinished);
}
_isCoroutineActive = false;
}
public IEnumerator ReplaceUnityTrees()
{
TreeInstance[] treeInstances = terrain.terrainData.treeInstances;
int instanceTotal = treeInstances.Length;
if (instanceTotal > 0)
{
Vector3 terrainSize = terrain.terrainData.size;
Vector3 terrainPosition = terrain.GetPosition();
Vector3 treePos = Vector3.zero;
TreeInstance treeInstance;
Vector4[] treeScales = new Vector4[prototypeList.Count];
int count = 0;
foreach (GPUInstancerTreePrototype tp in prototypeList)
{
treeScales[count] = tp.prefabObject.transform.localScale;
count++;
}
terrain.treeDistance = 0f; // will not persist if called at runtime.
Vector4[] treeDataArray = new Vector4[instanceTotal * 2]; // prototypeIndex - positionx3 - rotation - scalex2
int[] instanceCounts = new int[terrain.terrainData.treePrototypes.Length];
int index = 0;
for (int i = 0; i < instanceTotal; i++)
{
treeInstance = treeInstances[i];
treePos = treeInstance.position;
treeDataArray[index].x = treeInstance.prototypeIndex;
treeDataArray[index].y = treePos.x;
treeDataArray[index].z = treePos.y;
treeDataArray[index].w = treePos.z;
index++;
treeDataArray[index].x = treeInstance.rotation;
treeDataArray[index].y = treeInstance.widthScale;
treeDataArray[index].z = treeInstance.heightScale;
index++;
instanceCounts[treeInstance.prototypeIndex]++;
}
yield return(null);
ComputeBuffer treeDataBuffer = new ComputeBuffer(treeDataArray.Length, GPUInstancerConstants.STRIDE_SIZE_FLOAT4);
treeDataBuffer.SetData(treeDataArray);
ComputeBuffer treeScalesBuffer = new ComputeBuffer(treeScales.Length, GPUInstancerConstants.STRIDE_SIZE_FLOAT4);
treeScalesBuffer.SetData(treeScales);
ComputeBuffer counterBuffer = new ComputeBuffer(1, GPUInstancerConstants.STRIDE_SIZE_INT);
uint[] emptyCounterData = new uint[1];
GPUInstancerRuntimeData runtimeData;
for (int i = 0; i < runtimeDataList.Count; i++)
{
if (instanceCounts[i] == 0)
{
continue;
}
runtimeData = runtimeDataList[i];
counterBuffer.SetData(emptyCounterData);
runtimeData.transformationMatrixVisibilityBuffer = new ComputeBuffer(instanceCounts[i], GPUInstancerConstants.STRIDE_SIZE_MATRIX4X4);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.VisibilityKernelPoperties.INSTANCE_DATA_BUFFER, runtimeData.transformationMatrixVisibilityBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.TreeKernelProperties.TREE_DATA, treeDataBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.TreeKernelProperties.TREE_SCALES, treeScalesBuffer);
_treeInstantiationComputeShader.SetBuffer(0,
GPUInstancerConstants.GrassKernelProperties.COUNTER_BUFFER, counterBuffer);
_treeInstantiationComputeShader.SetInt(
GPUInstancerConstants.VisibilityKernelPoperties.BUFFER_PARAMETER_BUFFER_SIZE, instanceTotal);
_treeInstantiationComputeShader.SetVector(
GPUInstancerConstants.GrassKernelProperties.TERRAIN_SIZE_DATA, terrainSize);
_treeInstantiationComputeShader.SetVector(
GPUInstancerConstants.TreeKernelProperties.TERRAIN_POSITION, terrainPosition);
_treeInstantiationComputeShader.SetBool(
GPUInstancerConstants.TreeKernelProperties.IS_APPLY_ROTATION, ((GPUInstancerTreePrototype)runtimeData.prototype).isApplyRotation);
_treeInstantiationComputeShader.SetInt(
GPUInstancerConstants.TreeKernelProperties.PROTOTYPE_INDEX, i);
_treeInstantiationComputeShader.Dispatch(0,
Mathf.CeilToInt(instanceTotal / GPUInstancerConstants.VISIBILITY_SHADER_THREAD_COUNT), 1, 1);
runtimeData.bufferSize = instanceCounts[i];
runtimeData.instanceCount = instanceCounts[i];
GPUInstancerUtility.InitializeGPUBuffer(runtimeData);
yield return(null);
}
treeDataBuffer.Release();
treeScalesBuffer.Release();
counterBuffer.Release();
}
isInitial = true;
GPUInstancerUtility.TriggerEvent(GPUInstancerEventType.TreeInitializationFinished);
}