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Reworked SubMesh methods 

Former-commit-id: daff498f907bb28fdc9c7997c0ba602d640964c3
This commit is contained in:
Lynix 2014-07-08 11:28:01 +02:00
parent 5c2ae93d0b
commit 18849e7d21
1 changed files with 53 additions and 40 deletions
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93
src/Nazara/Utility/SubMesh.cpp
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@ -24,61 +24,67 @@ NzSubMesh::~NzSubMesh() = default;
void NzSubMesh::GenerateNormals()
{
NzVertexMapper mapper1(this);
unsigned int vertexCount = mapper1.GetVertexCount();
for (unsigned int i = 0; i < vertexCount; ++i)
mapper1.SetNormal(i, NzVector3f::Zero());
NzVertexMapper mapper(this);
unsigned int vertexCount = mapper.GetVertexCount();
mapper1.Unmap();
NzSparsePtr<NzVector3f> normals = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Normal);
NzSparsePtr<NzVector3f> positions = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Position);
for (unsigned int i = 0; i < vertexCount; ++i)
normals[i].MakeZero();
NzTriangleIterator iterator(this);
do
{
NzVector3f pos0 = iterator.GetPosition(0);
NzVector3f pos0 = positions[iterator[0]];
NzVector3f dv[2];
dv[0] = iterator.GetPosition(1) - pos0;
dv[1] = iterator.GetPosition(2) - pos0;
dv[0] = positions[iterator[1]] - pos0;
dv[1] = positions[iterator[2]] - pos0;
NzVector3f normal = dv[0].CrossProduct(dv[1]);
for (unsigned int i = 0; i < 3; ++i)
iterator.SetNormal(i, iterator.GetNormal(i) + normal);
normals[iterator[i]] += normal;
}
while (iterator.Advance());
NzVertexMapper mapper2(this);
for (unsigned int i = 0; i < vertexCount; ++i)
mapper2.SetNormal(i, NzVector3f::Normalize(mapper2.GetNormal(i)));
normals[i].Normalize();
}
void NzSubMesh::GenerateNormalsAndTangents()
{
NzVertexMapper mapper1(this);
unsigned int vertexCount = mapper1.GetVertexCount();
NzVertexMapper mapper(this);
unsigned int vertexCount = mapper.GetVertexCount();
NzSparsePtr<NzVector3f> normals = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Normal);
NzSparsePtr<NzVector3f> positions = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Position);
NzSparsePtr<NzVector3f> tangents = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Tangent);
NzSparsePtr<NzVector2f> texCoords = mapper.GetAttributePtr<NzVector2f>(nzAttributeUsage_TexCoord);
for (unsigned int i = 0; i < vertexCount; ++i)
{
mapper1.SetNormal(i, NzVector3f::Zero());
mapper1.SetTangent(i, NzVector3f::Zero());
normals[i].MakeZero();
tangents[i].MakeZero();
}
mapper1.Unmap();
NzTriangleIterator iterator(this);
do
{
NzVector3f pos0 = iterator.GetPosition(0);
NzVector2f uv0 = iterator.GetTexCoord(0);
NzVector3f pos0 = positions[iterator[0]];
NzVector3f dv[2];
dv[0] = iterator.GetPosition(1) - pos0;
dv[1] = iterator.GetPosition(2) - pos0;
dv[0] = positions[iterator[1]] - pos0;
dv[1] = positions[iterator[2]] - pos0;
NzVector3f normal = dv[0].CrossProduct(dv[1]);
NzVector2f uv0 = texCoords[iterator[0]];
NzVector2f duv[2];
duv[0] = iterator.GetTexCoord(1) - uv0;
duv[1] = iterator.GetTexCoord(2) - uv0;
duv[0] = texCoords[iterator[1]] - uv0;
duv[1] = texCoords[iterator[2]] - uv0;
float coef = 1.f / (duv[0].x*duv[1].y - duv[1].x*duv[0].y);
@ -89,39 +95,48 @@ void NzSubMesh::GenerateNormalsAndTangents()
for (unsigned int i = 0; i < 3; ++i)
{
iterator.SetNormal(i, iterator.GetNormal(i) + normal);
iterator.SetTangent(i, iterator.GetTangent(i) + tangent);
nzUInt32 index = iterator[i];
normals[index] += normal;
tangents[index] += tangent;
}
}
while (iterator.Advance());
NzVertexMapper mapper2(this);
for (unsigned int i = 0; i < vertexCount; ++i)
{
mapper2.SetNormal(i, NzVector3f::Normalize(mapper2.GetNormal(i)));
mapper2.SetTangent(i, NzVector3f::Normalize(mapper2.GetTangent(i)));
normals[i].Normalize();
tangents[i].Normalize();
}
}
void NzSubMesh::GenerateTangents()
{
NzVertexMapper mapper(this);
NzSparsePtr<NzVector3f> normals = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Normal);
NzSparsePtr<NzVector3f> positions = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Position);
NzSparsePtr<NzVector3f> tangents = mapper.GetAttributePtr<NzVector3f>(nzAttributeUsage_Tangent);
NzSparsePtr<NzVector2f> texCoords = mapper.GetAttributePtr<NzVector2f>(nzAttributeUsage_TexCoord);
NzTriangleIterator iterator(this);
do
{
NzVector3f pos0 = iterator.GetPosition(0);
NzVector2f uv0 = iterator.GetTexCoord(0);
NzVector3f pos0 = positions[iterator[0]];
NzVector2f uv0 = texCoords[iterator[0]];
NzVector2f uv1 = texCoords[iterator[1]];
NzVector2f uv2 = texCoords[iterator[2]];
NzVector3f dv[2];
dv[0] = iterator.GetPosition(1) - pos0;
dv[1] = iterator.GetPosition(2) - pos0;
dv[0] = positions[iterator[1]] - pos0;
dv[1] = positions[iterator[2]] - pos0;
NzVector2f duv[2];
duv[0] = iterator.GetTexCoord(1) - uv0;
duv[1] = iterator.GetTexCoord(2) - uv0;
duv[0] = uv1 - uv0;
duv[1] = uv2 - uv0;
float ds[2];
ds[0] = iterator.GetTexCoord(1).x - uv0.x;
ds[1] = iterator.GetTexCoord(2).x - uv0.x;
ds[0] = uv1.x - uv0.x;
ds[1] = uv2.x - uv0.x;
NzVector3f ppt;
ppt.x = ds[0]*dv[1].x - dv[0].x*ds[1];
@ -131,12 +146,10 @@ void NzSubMesh::GenerateTangents()
for (unsigned int i = 0; i < 3; ++i)
{
NzVector3f normal = iterator.GetNormal(i);
NzVector3f normal = normals[iterator[i]];
float d = ppt.DotProduct(normal);
NzVector3f tangent = ppt - (d * normal);
iterator.SetTangent(i, tangent);
tangents[iterator[i]] = ppt - (d * normal);
}
}
while (iterator.Advance());