void R004PseudoTexture::Render()
{
m_viewport->Clear();
MatrixStack mstackvertices;
MatrixStack mstacknormals;
// TODO: sort meshes
mstackvertices.PushMatrix(m_camera->m_projectionmatrix);
mstackvertices.PushMatrix(m_camera->m_viewmatrix);
mstacknormals.PushMatrix(m_camera->m_viewmatrix);
for (int i=0 ; i<m_scene->m_meshCount ; i++)
{
Mesh *mesh = m_scene->m_meshes[i];
//mstackvertices.PushMatrix(mesh->m_worldmatrix);
//mstacknormals.PushMatrix(mesh->m_worldmatrix);
// Transforming vertices into screen coords
Vec3f *vertices = new Vec3f[mesh->m_vertexcount];
for (unsigned int v=0 ; v<mesh->m_vertexcount ; v++)
{
Vec3f vec = mesh->m_vertexbuffer[v];
vec = vec * mstackvertices.GetTopMatrix();
vec.x = vec.x / ( (vec.z>0) ? (vec.z) : (-vec.z) );
vec.y = vec.y / ( (vec.z>0) ? (vec.z) : (-vec.z) );
vec = vec * m_viewport->m_viewportmatrix;
vertices[v] = vec;
}
// Reading index buffer and drawing lines
for (unsigned int s=0 ; s<mesh->m_stripcount ; s++)
{
Strip *strip = mesh->m_strips[s];
Vec3f v0,v1,v2;
v0 = vertices[strip->m_indexbuffer[0]];
v1 = vertices[strip->m_indexbuffer[1]];
for (unsigned i=2 ; i<strip->m_indexcount ; i++)
{
v2 = vertices[strip->m_indexbuffer[i]];
// backface culling
Vec3f cullingnormal = ((v1-v0).Cross((v2-v0)));
if (cullingnormal.z < 0) // TODO dotproduct with camera ?
{
// Calculate flat shading
Vec3f normal = (mesh->m_vertexbuffer[strip->m_indexbuffer[i]]-mesh->m_vertexbuffer[strip->m_indexbuffer[0]])
.Cross(mesh->m_vertexbuffer[strip->m_indexbuffer[i-1]]-mesh->m_vertexbuffer[strip->m_indexbuffer[0]]);
normal = normal.Mul3x3(mstacknormals.GetTopMatrix());
normal.Normalize();
Vec3f frontvec;
frontvec.z = 1;
float normaldotproduct = normal.Dot(frontvec);
if (normaldotproduct > 0) normaldotproduct = 0;
unsigned char shade = (unsigned char) ((normaldotproduct * (-200.0f)) + 55.0f);
// Fill poly
FillPoly(v0, v1, v2, shade);
}
v1 = v2;
}
}
//mstack.PopMatrix(); // Remove world matrix (the mesh one)
delete vertices;
}
}
