/// <summary>
/// 执行光纤追踪
/// </summary>
/// <param name="batch"></param>
/// <param name="vertexGroup"></param>
/// <param name="renderTarget"></param>
/// <param name="preTex"></param>
private void Raytracing(AOBakeBatch batch, AOBakeBatchVertexGroup vertexGroup, RenderTexture renderTarget, RenderTexture preTex)
{
m_BakeMaterial.SetTexture("_PreTex", preTex);//传入之前的结果，确保每次渲染都是基于之前的结果
m_BakeMaterial.SetVectorArray("_Vertices", vertexGroup.vertices);
m_BakeMaterial.SetFloat("_VertexCount", vertexGroup.vertexCount);
if (m_CurrentBatch != batch)
{
m_CurrentBatch = batch;
m_BakeMaterial.SetMatrix("_LocalToWorld", batch.localToWorld);
}
m_CommandBuffer.Clear();
m_CommandBuffer.ClearRenderTarget(true, true, new Color(0, 0, 0, 0));
m_CommandBuffer.SetRenderTarget(renderTarget);
m_CommandBuffer.DrawMesh(m_MeshFilter.sharedMesh, m_MeshFilter.transform.localToWorldMatrix, m_BakeMaterial, 0, 0);
}
private AOBakeBatch(Mesh mesh, GameObject gameObject)
{
m_Target = gameObject;
m_VertexGroups = new List <AOBakeBatchVertexGroup>();
Vector3[] vertices = mesh.vertices;
int subMeshCount = mesh.subMeshCount;
AOBakeBatchVertexGroup group = new AOBakeBatchVertexGroup();
for (int s = 0; s < subMeshCount; s++)
{
var triangles = mesh.GetTriangles(s);
for (int i = 0; i < triangles.Length; i += 3)
{
Vector4 p0 = vertices[triangles[i]];
Vector4 p1 = vertices[triangles[i + 1]];
Vector4 p2 = vertices[triangles[i + 2]];
p0.w = 1.0f;
p1.w = 1.0f;
p2.w = 1.0f;
group.AddTriangle(p0, p1, p2);
if (group.isFull)
{
m_VertexGroups.Add(group);
group = new AOBakeBatchVertexGroup();
}
}
}
if (group.vertexCount > 0)
{
m_VertexGroups.Add(group);
}
}