public void ComputeGrassFor(IEnvironmentSurface chunk)
{
MeshData meshData = chunk.MeshData;
int numTris = meshData.vertices.Length / 3;
vertexBuffer.SetData(meshData.vertices);
int numThreadPerAxis = Mathf.Max(1, Mathf.CeilToInt(numTris / THREAD_SIZE_GROUP));
grassProperties = new ComputeBuffer(GRASS_PER_COMPUTE, MeshInstancedProperties.Size(), ComputeBufferType.Append);
grassProperties.SetCounterValue(0);
Material mat = new Material(this.mat);
Maybe <Bounds> mBounds = chunk.MeshBounds;
Vector3 offset = mBounds.Value.center;
grassShader.SetInt(NAME_OF_TRIANGLE_LENGTH, numTris);
grassShader.SetVector(NAME_OF_OFFSET, offset);
grassShader.SetFloat(NAME_OF_BOUNDS, grassMesh.bounds.extents.y);
grassShader.SetBuffer(0, NAME_OF_TRIANGLE_BUFFER, vertexBuffer);
grassShader.SetBuffer(0, NAME_OF_GRASS_BUFFER, grassProperties);
grassShader.Dispatch(0, numThreadPerAxis, 1, 1);
new InstantiatableData(grassMesh, grassProperties, mat, mBounds);
grassProperties = null;
}
public InstanciableData(Mesh instanceMesh, int count, ComputeBuffer instanceTransformations, Material material, Bounds bounds)
{
this.material = material;
this.instanceTransformations = instanceTransformations;
this.bounds = bounds;
this.instanceMesh = instanceMesh;
args = new uint[]
{
instanceMesh.GetIndexCount(0),
0,
instanceMesh.GetIndexStart(0),
instanceMesh.GetBaseVertex(0),
0
};
//Color[] colors = new Color[instanceMesh.vertexCount];
//for (int i = 0; i < colors.Length; i++)
//{
// colors[i] = Color.red;
//}
//instanceMesh.colors = colors;
argsBuffer = new ComputeBuffer(1, args.Length * sizeof(uint), ComputeBufferType.IndirectArguments);
meshPropertiesBuffer = argsBuffer;
argsBuffer.SetData(args);
//MeshInstancedProperties props = new MeshInstancedProperties();
//Vector3 position = new Vector3(1, 2, 3);
//Quaternion rotation = Quaternion.identity;
//Vector3 scale = Vector3.one * 3;
//props.mat = Matrix4x4.TRS(position, rotation, scale);
//float[] vals = new float[16];
//for (int column = 0; column < 4; column++)
//{
// for (int row = 0; row < 4; row++)
// {
// vals[column * 4 + row] = props.mat[1];
// }
//}
//MeshInstancedProperties[] mesh = new MeshInstancedProperties[count];
//ExtensionArray.Fill(mesh, props);
//instanceTransformations.SetData(mesh);
material.SetBuffer(MATERIAL_PROPERTY_BUFFER_NAME, instanceTransformations);
ComputeBuffer.CopyCount(instanceTransformations, argsBuffer, 4);
argsBuffer.GetData(args);
MeshInstancedProperties[] propss = new MeshInstancedProperties[args[1]];
instanceTransformations.GetData(propss);
MeshInstantiator.meshInstantiator.AddData(this);
}
public void ComputeGrassFor(Bounds bounds, int numTris, ComputeBuffer triangleData)
{
int numThreadPerAxis = Mathf.Max(1, Mathf.CeilToInt(numTris / 32f));
grassProperties = new ComputeBuffer(GRASS_PER_COMPUTE, MeshInstancedProperties.Size(), ComputeBufferType.Append);
grassProperties.SetCounterValue(0);
Material mat = new Material(this.mat);
Vector3 offset = bounds.center;
grassShader.SetInt(NAME_OF_TRIANGLE_LENGTH, numTris);
grassShader.SetVector(NAME_OF_OFFSET, offset);
grassShader.SetFloat(NAME_OF_BOUNDS, grassMesh.bounds.extents.y);
grassShader.SetBuffer(0, NAME_OF_TRIANGLE_BUFFER, triangleData);
grassShader.SetBuffer(0, NAME_OF_GRASS_BUFFER, grassProperties);
grassShader.Dispatch(0, numThreadPerAxis, 1, 1);
new InstanciableData(grassMesh, numTris, grassProperties, mat, bounds);
grassProperties = null;
}
