private bool RenderSubMesh(SoftMesh mesh, SoftSubMesh subMesh, Matrix4x4 objToWorld, RenderPassMode passMode)
{
if (subMesh == null || passMode == null)
{
return(false);
}
var indexes = subMesh.Indexes;
var vertexs = mesh.Vertexs;
var colors = mesh.Colors;
var uv1s = mesh.UV1s;
bool ret = false;
bool isColorEmpty = colors == null || colors.Count <= 0;
bool isUV1Empty = uv1s == null || uv1s.Count <= 0;
Color c1 = Color.white;
Color c2 = Color.white;
Color c3 = Color.white;
Vector4 uv1_1 = Vector4.zero;
Vector4 uv1_2 = Vector4.zero;
Vector4 uv1_3 = Vector4.zero;
if (vertexs != null && (isColorEmpty || vertexs.Count == colors.Count) &&
indexes != null && indexes.Count > 0)
{
int triangleCnt = ((int)indexes.Count / 3);
for (int i = 0; i < triangleCnt; ++i)
{
int idx = i * 3;
int index = indexes[idx];
Vector3 p1 = vertexs[index];
if (!isColorEmpty)
{
c1 = colors[index];
}
if (!isUV1Empty)
{
uv1_1 = uv1s[index];
}
index = indexes[idx + 1];
Vector3 p2 = vertexs[index];
if (!isColorEmpty)
{
c2 = colors[index];
}
if (!isUV1Empty)
{
uv1_2 = uv1s[index];
}
index = indexes[idx + 2];
Vector3 p3 = vertexs[index];
if (!isColorEmpty)
{
c3 = colors[index];
}
if (!isUV1Empty)
{
uv1_3 = uv1s[index];
}
Triangle tri = new Triangle(p1, p2, p3);
// 三角形转到世界坐标系
tri.MulMatrix(objToWorld);
// 过CullMode 【注意】根据渲染管线VertexShader中可以任意改变三角形，所以要放到VS后面才行，也就是到MVP坐标系里判断
// 不在这里做摄影机剔除，移到VS后面
// if (SoftMath.IsCulled(this, passMode.Cull, tri)) {
// continue;
// }
//----
TriangleVertex triV = new TriangleVertex(tri, c1, c2, c3, passMode.mainTex);
if (!isUV1Empty)
{
triV.uv1_1 = uv1_1;
triV.uv1_2 = uv1_2;
triV.uv1_3 = uv1_3;
}
// 进入VertexShader了， 做顶点变换等
m_TrianglesMgr.AddTriangle(triV);
ret = true;
}
}
return(ret);
}
public void BuildFromMesh(Mesh mesh)
{
Clear();
if (mesh != null)
{
Vector3 minVec = Vector3.zero;
Vector3 maxVec = Vector3.zero;
bool isInitMinMax = false;
List <Vector3> vertexs = new List <Vector3>();
mesh.GetVertices(vertexs);
if (vertexs.Count > 0)
{
m_VertexBuffer = new VertexBuffer();
m_VertexBuffer.Capacity = vertexs.Count;
for (int i = 0; i < vertexs.Count; ++i)
{
Vector3 v = vertexs[i];
m_VertexBuffer.Add(v);
if (!isInitMinMax)
{
minVec = v;
maxVec = v;
isInitMinMax = true;
}
else
{
if (minVec.x > v.x)
{
minVec.x = v.x;
}
if (minVec.y > v.y)
{
minVec.y = v.y;
}
if (minVec.z > v.z)
{
minVec.z = v.z;
}
if (maxVec.x < v.x)
{
maxVec.x = v.x;
}
if (maxVec.y < v.y)
{
maxVec.y = v.y;
}
if (maxVec.z < v.z)
{
maxVec.z = v.z;
}
}
}
}
if (isInitMinMax)
{
m_BoundSpere.position = (maxVec + minVec) / 2.0f;
m_BoundSpere.radius = (maxVec - minVec).magnitude / 2.0f;
}
else
{
m_BoundSpere.position = Vector3.zero;
m_BoundSpere.radius = 0f;
}
List <Color> colors = new List <Color>();
mesh.GetColors(colors);
if (colors.Count > 0)
{
m_ColorBuffer = new VertexColorBuffer();
m_ColorBuffer.Capacity = colors.Count;
for (int i = 0; i < colors.Count; ++i)
{
m_ColorBuffer.Add(colors[i]);
}
}
// UV 1坐标
List <Vector4> uvs = new List <Vector4>();
mesh.GetUVs(0, uvs);
if (uvs.Count > 0)
{
if (m_UV1Buffer == null)
{
m_UV1Buffer = new UVBuffer();
}
m_UV1Buffer.Capacity = uvs.Count;
for (int i = 0; i < uvs.Count; ++i)
{
m_UV1Buffer.Add(uvs[i]);
}
}
for (int i = 0; i < mesh.subMeshCount; ++i)
{
if (m_SubList == null)
{
m_SubList = new List <SoftSubMesh>();
}
var triangles = mesh.GetTriangles(i);
if (triangles != null && triangles.Length > 0)
{
SoftSubMesh subMesh = new SoftSubMesh(mesh, triangles);
m_SubList.Add(subMesh);
}
}
}
}