private void FlipTriangle(TriangleVertex vertex, RenderPassMode passMode)
{
// 三角形转到屏幕坐标系
RenderTarget target = this.Target;
if (target != null)
{
if (IsShowVertexLog)
{
DebugVertexLog(vertex);
}
// 这里是VertexShader的部分
// 世界坐标系到屏幕坐标系
if (passMode.vertexShader == null)
{
// 默认的一个处理
//vertex.triangle.Trans(this.WorldToScreenPointEvt2, false);
vertex.triangle.MulMatrix(this.Shader_MVP_Matrix);
}
else
{
InitPassMode(passMode);
passMode.vertexShader.Main(ref vertex);
}
// 做个三角形的判断
if (vertex.IsAllZGreateOne)
{
return;
}
// 这里做背面剔除
if (SoftMath.Is_MVP_Culled(passMode.Cull, vertex.triangle))
{
return;
}
vertex.triangle.MulMatrix(this.LinkerScreenMatrix);
#if _Use_FlipTrangle2
target.FlipScreenTriangle2(this, vertex, passMode);
#else
target.FlipScreenTriangle(this, vertex, passMode);
#endif
}
}
private void FlipTraiangles(RenderPassMode passMode)
{
TriangleVertex tri;
for (int i = 0; i < m_TrianglesMgr.Count; ++i)
{
if (m_TrianglesMgr.GetTrangle(i, out tri))
{
// tri已经是世界坐标系的
FlipTriangle(tri, passMode);
}
else
{
break;
}
}
m_TrianglesMgr.Clear();
}
// 提交到渲染队列中
public override bool Render(SoftCamera camera, RenderPassMode passMode)
{
if (camera == null || passMode == null || m_Mesh == null)
{
return(false);
}
UpdateGlobalToLocalMatrix();
CullMode old = passMode.Cull;
passMode.Cull = this.cullMode;
int oldMainTex = passMode.mainTex;
passMode.mainTex = m_MainTex;
bool ret = camera.RenderMesh(m_Mesh, m_MeshAxisToGlobalMatrix, passMode);
passMode.Cull = old;
passMode.mainTex = oldMainTex;
return(ret);
}
public bool RenderMesh(SoftMesh mesh, Matrix4x4 objToWorld, RenderPassMode passMode)
{
if (mesh == null || passMode == null)
{
return(false);
}
var subMeshes = mesh.SubMeshes;
bool ret = false;
if (subMeshes != null)
{
for (int i = 0; i < subMeshes.Count; ++i)
{
var subMesh = subMeshes[i];
if (RenderSubMesh(mesh, subMesh, objToWorld, passMode))
{
ret = true;
}
}
}
return(ret);
}
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);
}
internal virtual void DoCameraPostRender(RenderPassMode passMode)
{
// 提交渲染结果
FlipTraiangles(passMode);
}
private void InitPassMode(RenderPassMode passMode)
{
passMode.MVPMatrix = this.Shader_MVP_Matrix;
}
public virtual bool Render(SoftCamera camera, RenderPassMode passMode)
{
return(false);
}