1291 lines
40 KiB
C++
1291 lines
40 KiB
C++
// cmodops.cpp
|
|
//
|
|
// Copyright (C) 2004-2010, Chris Laurel <claurel@gmail.com>
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License
|
|
// as published by the Free Software Foundation; either version 2
|
|
// of the License, or (at your option) any later version.
|
|
//
|
|
// Perform various adjustments to a Celestia mesh.
|
|
|
|
#include <algorithm>
|
|
#include <array>
|
|
#include <cassert>
|
|
#include <cmath>
|
|
#include <cstring>
|
|
#include <iostream>
|
|
#include <iterator>
|
|
#include <numeric>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include <celmodel/model.h>
|
|
|
|
#include "cmodops.h"
|
|
|
|
|
|
namespace
|
|
{
|
|
struct Vertex
|
|
{
|
|
Vertex() :
|
|
index(0),
|
|
attributes(nullptr)
|
|
{};
|
|
|
|
Vertex(std::uint32_t _index, const cmod::VWord* _attributes) :
|
|
index(_index),
|
|
attributes(_attributes)
|
|
{};
|
|
|
|
std::uint32_t index;
|
|
const cmod::VWord* attributes;
|
|
};
|
|
|
|
|
|
struct Face
|
|
{
|
|
Eigen::Vector3f normal;
|
|
std::uint32_t i[3]; // vertex attribute indices
|
|
std::uint32_t vi[3]; // vertex point indices -- same as above unless welding
|
|
};
|
|
|
|
|
|
struct VertexComparator
|
|
{
|
|
virtual bool compare(const Vertex& a, const Vertex& b) const = 0;
|
|
virtual ~VertexComparator() = default;
|
|
|
|
bool operator()(const Vertex& a, const Vertex& b) const
|
|
{
|
|
return compare(a, b);
|
|
}
|
|
};
|
|
|
|
|
|
class FullComparator : public VertexComparator
|
|
{
|
|
public:
|
|
FullComparator(int _vertexSize) :
|
|
vertexSize(_vertexSize)
|
|
{
|
|
}
|
|
|
|
bool compare(const Vertex& a, const Vertex& b) const override
|
|
{
|
|
return std::lexicographical_compare(a.attributes, a.attributes + vertexSize,
|
|
b.attributes, b.attributes + vertexSize);
|
|
}
|
|
|
|
private:
|
|
int vertexSize;
|
|
};
|
|
|
|
|
|
class PointOrderingPredicate : public VertexComparator
|
|
{
|
|
public:
|
|
bool compare(const Vertex& a, const Vertex& b) const override
|
|
{
|
|
std::array<float, 3> p0;
|
|
std::memcpy(p0.data(), a.attributes, sizeof(float) * 3);
|
|
|
|
std::array<float, 3> p1;
|
|
std::memcpy(p1.data(), b.attributes, sizeof(float) * 3);
|
|
|
|
return p0 < p1;
|
|
}
|
|
|
|
private:
|
|
int ignore;
|
|
};
|
|
|
|
|
|
class PointTexCoordOrderingPredicate : public VertexComparator
|
|
{
|
|
public:
|
|
PointTexCoordOrderingPredicate(std::uint32_t _posOffset,
|
|
std::uint32_t _texCoordOffset,
|
|
bool _wrap) :
|
|
posOffset(_posOffset),
|
|
texCoordOffset(_texCoordOffset),
|
|
wrap(_wrap)
|
|
{
|
|
}
|
|
|
|
bool compare(const Vertex& a, const Vertex& b) const override
|
|
{
|
|
std::array<float, 5> ptc0;
|
|
std::memcpy(ptc0.data(), a.attributes + posOffset, sizeof(float) * 3);
|
|
std::memcpy(ptc0.data() + 3, a.attributes + texCoordOffset, sizeof(float) * 2);
|
|
|
|
std::array<float, 5> ptc1;
|
|
std::memcpy(ptc1.data(), b.attributes + posOffset, sizeof(float) * 3);
|
|
std::memcpy(ptc1.data() + 3, b.attributes + texCoordOffset, sizeof(float) * 2);
|
|
|
|
return ptc0 < ptc1;
|
|
}
|
|
|
|
private:
|
|
std::uint32_t posOffset;
|
|
std::uint32_t texCoordOffset;
|
|
bool wrap;
|
|
};
|
|
|
|
|
|
bool approxEqual(float x, float y, float prec)
|
|
{
|
|
return std::abs(x - y) <= prec * std::min(std::abs(x), std::abs(y));
|
|
}
|
|
|
|
|
|
class PointEquivalencePredicate : public VertexComparator
|
|
{
|
|
public:
|
|
PointEquivalencePredicate(std::uint32_t _posOffset,
|
|
float _tolerance) :
|
|
posOffset(_posOffset),
|
|
tolerance(_tolerance)
|
|
{
|
|
}
|
|
|
|
bool compare(const Vertex& a, const Vertex& b) const override
|
|
{
|
|
std::array<float, 3> p0;
|
|
std::memcpy(p0.data(), a.attributes + posOffset, sizeof(float) * 3);
|
|
|
|
std::array<float, 3> p1;
|
|
std::memcpy(p1.data(), b.attributes + posOffset, sizeof(float) * 3);
|
|
|
|
return std::equal(p0.cbegin(), p0.cend(), p1.cbegin(),
|
|
[&](float f0, float f1) { return approxEqual(f0, f1, tolerance); });
|
|
}
|
|
|
|
private:
|
|
std::uint32_t posOffset;
|
|
float tolerance;
|
|
};
|
|
|
|
|
|
class PointTexCoordEquivalencePredicate : public VertexComparator
|
|
{
|
|
public:
|
|
PointTexCoordEquivalencePredicate(std::uint32_t _posOffset,
|
|
std::uint32_t _texCoordOffset,
|
|
bool _wrap,
|
|
float _tolerance) :
|
|
posOffset(_posOffset),
|
|
texCoordOffset(_texCoordOffset),
|
|
wrap(_wrap),
|
|
tolerance(_tolerance)
|
|
{
|
|
}
|
|
|
|
bool compare(const Vertex& a, const Vertex& b) const override
|
|
{
|
|
std::array<float, 5> ptc0;
|
|
std::memcpy(ptc0.data(), a.attributes + posOffset, sizeof(float) * 3);
|
|
std::memcpy(ptc0.data() + 3, a.attributes + texCoordOffset, sizeof(float) * 2);
|
|
|
|
std::array<float, 5> ptc1;
|
|
std::memcpy(ptc1.data(), b.attributes + posOffset, sizeof(float) * 3);
|
|
std::memcpy(ptc1.data() + 3, b.attributes + texCoordOffset, sizeof(float) * 2);
|
|
|
|
return std::equal(ptc0.cbegin(), ptc0.cend(), ptc1.cbegin(),
|
|
[&](float f0, float f1) { return approxEqual(f0, f1, tolerance); });
|
|
}
|
|
|
|
private:
|
|
std::uint32_t posOffset;
|
|
std::uint32_t texCoordOffset;
|
|
bool wrap;
|
|
float tolerance;
|
|
};
|
|
|
|
|
|
bool equal(const Vertex& a, const Vertex& b, std::uint32_t vertexSize)
|
|
{
|
|
return std::equal(a.attributes, a.attributes + vertexSize, b.attributes);
|
|
}
|
|
|
|
|
|
bool equalPoint(const Vertex& a, const Vertex& b)
|
|
{
|
|
std::array<float, 3> p0;
|
|
std::memcpy(p0.data(), a.attributes, sizeof(float) * 3);
|
|
|
|
std::array<float, 3> p1;
|
|
std::memcpy(p1.data(), b.attributes, sizeof(float) * 3);
|
|
|
|
return p0 == p1;
|
|
}
|
|
|
|
|
|
Eigen::Vector3f
|
|
getVertex(const cmod::VWord* vertexData,
|
|
int positionOffset,
|
|
std::uint32_t strideWords,
|
|
std::uint32_t index)
|
|
{
|
|
float fdata[3];
|
|
std::memcpy(fdata, vertexData + strideWords * index + positionOffset, sizeof(float) * 3);
|
|
return Eigen::Vector3f(fdata);
|
|
}
|
|
|
|
|
|
Eigen::Vector2f
|
|
getTexCoord(const cmod::VWord* vertexData,
|
|
int texCoordOffset,
|
|
uint32_t strideWords,
|
|
uint32_t index)
|
|
{
|
|
float fdata[2];
|
|
std::memcpy(fdata, vertexData + strideWords * index + texCoordOffset, sizeof(float) * 2);
|
|
return Eigen::Vector2f(fdata);
|
|
}
|
|
|
|
|
|
Eigen::Vector3f
|
|
averageFaceVectors(const std::vector<Face>& faces,
|
|
std::uint32_t thisFace,
|
|
std::uint32_t* vertexFaces,
|
|
std::uint32_t vertexFaceCount,
|
|
float cosSmoothingAngle)
|
|
{
|
|
const Face& face = faces[thisFace];
|
|
|
|
Eigen::Vector3f v = Eigen::Vector3f::Zero();
|
|
for (std::uint32_t i = 0; i < vertexFaceCount; i++)
|
|
{
|
|
std::uint32_t f = vertexFaces[i];
|
|
float cosAngle = face.normal.dot(faces[f].normal);
|
|
if (f == thisFace || cosAngle > cosSmoothingAngle)
|
|
v += faces[f].normal;
|
|
}
|
|
|
|
if (v.squaredNorm() == 0.0f)
|
|
v = Eigen::Vector3f::UnitX();
|
|
else
|
|
v.normalize();
|
|
|
|
return v;
|
|
}
|
|
|
|
|
|
void
|
|
copyVertex(cmod::VWord* newVertexData,
|
|
const cmod::VertexDescription& newDesc,
|
|
const cmod::VWord* oldVertexData,
|
|
const cmod::VertexDescription& oldDesc,
|
|
std::uint32_t oldIndex,
|
|
const std::uint32_t fromOffsets[])
|
|
{
|
|
unsigned int stride = oldDesc.strideBytes / sizeof(cmod::VWord);
|
|
const cmod::VWord* oldVertex = oldVertexData + stride * oldIndex;
|
|
|
|
for (std::size_t i = 0; i < newDesc.attributes.size(); i++)
|
|
{
|
|
if (fromOffsets[i] != ~0u)
|
|
{
|
|
std::memcpy(newVertexData + newDesc.attributes[i].offsetWords,
|
|
oldVertex + fromOffsets[i],
|
|
cmod::VertexAttribute::getFormatSizeWords(newDesc.attributes[i].format) * sizeof(cmod::VWord));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
augmentVertexDescription(cmod::VertexDescription& desc,
|
|
cmod::VertexAttributeSemantic semantic,
|
|
cmod::VertexAttributeFormat format)
|
|
{
|
|
std::uint32_t stride = 0;
|
|
bool foundMatch = false;
|
|
|
|
auto it = desc.attributes.begin();
|
|
auto end = desc.attributes.end();
|
|
for (auto i = desc.attributes.begin(); i != end; ++i)
|
|
{
|
|
if (semantic == i->semantic && format != i->format)
|
|
{
|
|
// The semantic matches, but the format does not; skip this
|
|
// item.
|
|
continue;
|
|
}
|
|
|
|
foundMatch |= (semantic == i->semantic);
|
|
i->offsetWords = stride;
|
|
stride += cmod::VertexAttribute::getFormatSizeWords(i->format);
|
|
*it++ = std::move(*i);
|
|
}
|
|
|
|
desc.attributes.erase(it, end);
|
|
|
|
if (!foundMatch)
|
|
{
|
|
desc.attributes.emplace_back(semantic, format, stride);
|
|
stride += cmod::VertexAttribute::getFormatSizeWords(format);
|
|
}
|
|
|
|
desc.strideBytes = stride * sizeof(cmod::VWord);
|
|
}
|
|
|
|
|
|
void
|
|
addGroupWithOffset(cmod::Mesh& mesh,
|
|
const cmod::PrimitiveGroup& group,
|
|
std::uint32_t offset)
|
|
{
|
|
if (group.indices.empty())
|
|
return;
|
|
|
|
std::vector<cmod::Index32> newIndices;
|
|
newIndices.reserve(group.indices.size());
|
|
std::transform(group.indices.cbegin(), group.indices.cend(),
|
|
std::back_inserter(newIndices),
|
|
[=](cmod::Index32 idx) { return idx + offset; });
|
|
|
|
mesh.addGroup(group.prim, group.materialIndex, std::move(newIndices));
|
|
}
|
|
|
|
|
|
template<typename T, typename U> void
|
|
joinVertices(std::vector<Face>& faces,
|
|
const cmod::VWord* vertexData,
|
|
const cmod::VertexDescription& desc,
|
|
const T& orderingPredicate,
|
|
const U& equivalencePredicate)
|
|
{
|
|
// Don't do anything if we're given no data
|
|
if (faces.size() == 0)
|
|
return;
|
|
|
|
// Must have a position
|
|
assert(desc.getAttribute(cmod::Mesh::Position).format == cmod::Mesh::Float3);
|
|
|
|
std::uint32_t posOffset = desc.getAttribute(cmod::VertexAttributeSemantic::Position).offsetWords;
|
|
const cmod::VWord* vertexPoints = vertexData + posOffset;
|
|
std::uint32_t nVertices = faces.size() * 3;
|
|
|
|
// Initialize the array of vertices
|
|
std::vector<Vertex> vertices(nVertices);
|
|
std::uint32_t f;
|
|
unsigned int stride = desc.strideBytes / sizeof(cmod::VWord);
|
|
for (f = 0; f < faces.size(); f++)
|
|
{
|
|
for (std::uint32_t j = 0; j < 3; j++)
|
|
{
|
|
std::uint32_t index = faces[f].i[j];
|
|
vertices[f * 3 + j] = Vertex(index, vertexPoints + stride * index);
|
|
|
|
}
|
|
}
|
|
|
|
// Sort the vertices so that identical ones will be ordered consecutively
|
|
std::sort(vertices.begin(), vertices.end(), orderingPredicate);
|
|
|
|
// Build the vertex merge map
|
|
std::vector<std::uint32_t> mergeMap(nVertices);
|
|
std::uint32_t lastUnique = 0;
|
|
std::uint32_t uniqueCount = 0;
|
|
for (std::uint32_t i = 0; i < nVertices; i++)
|
|
{
|
|
if (i == 0 || !equivalencePredicate(vertices[i - 1], vertices[i]))
|
|
{
|
|
lastUnique = i;
|
|
uniqueCount++;
|
|
}
|
|
|
|
mergeMap[vertices[i].index] = vertices[lastUnique].index;
|
|
}
|
|
|
|
// Remap the vertex indices
|
|
for (f = 0; f < faces.size(); f++)
|
|
{
|
|
for (std::uint32_t k= 0; k < 3; k++)
|
|
{
|
|
faces[f].vi[k] = mergeMap[faces[f].i[k]];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
} // end unnamed namespace
|
|
|
|
|
|
/** Generate surface normals for a mesh. A new mesh with normals is returned, and
|
|
* the original mesh is unmodified.
|
|
*
|
|
* @param mesh the mesh to generate normals for
|
|
* @param smoothAngle maximum angle (in radians) between two faces that are
|
|
* treated as belonging to the same smooth surface patch
|
|
* @param weld true if vertices with identical positions should be treated
|
|
* as the same during normal generation (typically should be true)
|
|
* @param weldTolerance maximum difference between positions that should be
|
|
* considered identical during the weld step.
|
|
*/
|
|
cmod::Mesh
|
|
GenerateNormals(const cmod::Mesh& mesh, float smoothAngle, bool weld, float weldTolerance)
|
|
{
|
|
std::uint32_t nVertices = mesh.getVertexCount();
|
|
float cosSmoothAngle = std::cos(smoothAngle);
|
|
|
|
const cmod::VertexDescription& desc = mesh.getVertexDescription();
|
|
|
|
if (desc.getAttribute(cmod::VertexAttributeSemantic::Position).format != cmod::VertexAttributeFormat::Float3)
|
|
{
|
|
std::cerr << "Vertex position must be a float3\n";
|
|
return cmod::Mesh();
|
|
}
|
|
|
|
std::uint32_t posOffset = desc.getAttribute(cmod::VertexAttributeSemantic::Position).offsetWords;
|
|
unsigned int stride = desc.strideBytes / sizeof(cmod::VWord);
|
|
|
|
std::uint32_t nFaces = 0;
|
|
std::uint32_t i;
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(i);
|
|
|
|
switch (group->prim)
|
|
{
|
|
case cmod::PrimitiveGroupType::TriList:
|
|
if (group->indices.size() < 3 || group->indices.size() % 3 != 0)
|
|
{
|
|
std::cerr << "Triangle list has invalid number of indices\n";
|
|
return cmod::Mesh();
|
|
}
|
|
nFaces += group->indices.size() / 3;
|
|
break;
|
|
|
|
case cmod::PrimitiveGroupType::TriStrip:
|
|
case cmod::PrimitiveGroupType::TriFan:
|
|
if (group->indices.size() < 3)
|
|
{
|
|
std::cerr << "Error: tri strip or fan has less than three indices\n";
|
|
return cmod::Mesh();
|
|
}
|
|
nFaces += group->indices.size() - 2;
|
|
break;
|
|
|
|
default:
|
|
std::cerr << "Cannot generate normals for non-triangle primitives\n";
|
|
return cmod::Mesh();
|
|
}
|
|
}
|
|
|
|
// Build the array of faces; this may require decomposing triangle strips
|
|
// and fans into triangle lists.
|
|
std::vector<Face> faces(nFaces);
|
|
|
|
std::uint32_t f = 0;
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(i);
|
|
|
|
switch (group->prim)
|
|
{
|
|
case cmod::PrimitiveGroupType::TriList:
|
|
{
|
|
for (std::uint32_t j = 0; j < group->indices.size() / 3; j++)
|
|
{
|
|
assert(f < nFaces);
|
|
faces[f].i[0] = group->indices[j * 3];
|
|
faces[f].i[1] = group->indices[j * 3 + 1];
|
|
faces[f].i[2] = group->indices[j * 3 + 2];
|
|
f++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case cmod::PrimitiveGroupType::TriStrip:
|
|
{
|
|
for (std::uint32_t j = 2; j < group->indices.size(); j++)
|
|
{
|
|
assert(f < nFaces);
|
|
if (j % 2 == 0)
|
|
{
|
|
faces[f].i[0] = group->indices[j - 2];
|
|
faces[f].i[1] = group->indices[j - 1];
|
|
faces[f].i[2] = group->indices[j];
|
|
}
|
|
else
|
|
{
|
|
faces[f].i[0] = group->indices[j - 1];
|
|
faces[f].i[1] = group->indices[j - 2];
|
|
faces[f].i[2] = group->indices[j];
|
|
}
|
|
f++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case cmod::PrimitiveGroupType::TriFan:
|
|
{
|
|
for (std::uint32_t j = 2; j < group->indices.size(); j++)
|
|
{
|
|
assert(f < nFaces);
|
|
faces[f].i[0] = group->indices[0];
|
|
faces[f].i[1] = group->indices[j - 1];
|
|
faces[f].i[2] = group->indices[j];
|
|
f++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
}
|
|
assert(f == nFaces);
|
|
|
|
const cmod::VWord* vertexData = mesh.getVertexData();
|
|
|
|
// Compute normals for the faces
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
Eigen::Vector3f p0 = getVertex(vertexData, posOffset, stride, face.i[0]);
|
|
Eigen::Vector3f p1 = getVertex(vertexData, posOffset, stride, face.i[1]);
|
|
Eigen::Vector3f p2 = getVertex(vertexData, posOffset, stride, face.i[2]);
|
|
face.normal = (p1 - p0).cross(p2 - p1);
|
|
if (face.normal.squaredNorm() > 0.0f)
|
|
{
|
|
face.normal.normalize();
|
|
}
|
|
}
|
|
|
|
// For each vertex, create a list of faces that contain it
|
|
std::vector<std::uint32_t> faceCounts(nVertices, 0);
|
|
std::vector<std::vector<std::uint32_t>> vertexFaces(nVertices);
|
|
|
|
// If we're welding vertices before generating normals, find identical
|
|
// points and merge them. Otherwise, the point indices will be the same
|
|
// as the attribute indices.
|
|
if (weld)
|
|
{
|
|
joinVertices(faces, vertexData, desc,
|
|
PointOrderingPredicate(),
|
|
PointEquivalencePredicate(0, weldTolerance));
|
|
}
|
|
else
|
|
{
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
faces[f].vi[0] = faces[f].i[0];
|
|
faces[f].vi[1] = faces[f].i[1];
|
|
faces[f].vi[2] = faces[f].i[2];
|
|
}
|
|
}
|
|
|
|
// Count the number of faces in which each vertex appears
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
faceCounts[face.vi[0]]++;
|
|
faceCounts[face.vi[1]]++;
|
|
faceCounts[face.vi[2]]++;
|
|
}
|
|
|
|
// Allocate space for the per-vertex face lists
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
if (faceCounts[i] > 0)
|
|
{
|
|
vertexFaces[i].resize(faceCounts[i] + 1);
|
|
vertexFaces[i][0] = faceCounts[i];
|
|
}
|
|
}
|
|
|
|
// Fill in the vertex/face lists
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
vertexFaces[face.vi[0]][faceCounts[face.vi[0]]--] = f;
|
|
vertexFaces[face.vi[1]][faceCounts[face.vi[1]]--] = f;
|
|
vertexFaces[face.vi[2]][faceCounts[face.vi[2]]--] = f;
|
|
}
|
|
|
|
// Compute the vertex normals by averaging
|
|
std::vector<Eigen::Vector3f> vertexNormals(nFaces * 3);
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
for (std::uint32_t j = 0; j < 3; j++)
|
|
{
|
|
vertexNormals[f * 3 + j] =
|
|
averageFaceVectors(faces, f,
|
|
&vertexFaces[face.vi[j]][1],
|
|
vertexFaces[face.vi[j]][0],
|
|
cosSmoothAngle);
|
|
}
|
|
}
|
|
|
|
// Finally, create a new mesh with normals included
|
|
|
|
// Create the new vertex description
|
|
cmod::VertexDescription newDesc = desc.clone();
|
|
augmentVertexDescription(newDesc, cmod::VertexAttributeSemantic::Normal, cmod::VertexAttributeFormat::Float3);
|
|
|
|
// We need to convert the copy the old vertex attributes to the new
|
|
// mesh. In order to do this, we need the old offset of each attribute
|
|
// in the new vertex description. The fromOffsets array will contain
|
|
// this mapping.
|
|
std::uint32_t normalOffset = 0;
|
|
std::uint32_t fromOffsets[16];
|
|
for (i = 0; i < newDesc.attributes.size(); i++)
|
|
{
|
|
fromOffsets[i] = ~0;
|
|
|
|
if (newDesc.attributes[i].semantic == cmod::VertexAttributeSemantic::Normal)
|
|
{
|
|
normalOffset = newDesc.attributes[i].offsetWords;
|
|
}
|
|
else
|
|
{
|
|
for (const auto& oldAttr : desc.attributes)
|
|
{
|
|
if (oldAttr.semantic == newDesc.attributes[i].semantic)
|
|
{
|
|
assert(oldAttr.format == newDesc.attributes[i].format);
|
|
fromOffsets[i] = oldAttr.offsetWords;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Copy the old vertex data along with the generated normals to the
|
|
// new vertex data buffer.
|
|
unsigned int newStride = newDesc.strideBytes / sizeof(cmod::VWord);
|
|
std::vector<cmod::VWord> newVertexData(newStride * nFaces * 3);
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
|
|
for (std::uint32_t j = 0; j < 3; j++)
|
|
{
|
|
cmod::VWord* newVertex = newVertexData.data() + (f * 3 + j) * newStride;
|
|
copyVertex(newVertex, newDesc,
|
|
vertexData, desc,
|
|
face.i[j],
|
|
fromOffsets);
|
|
std::memcpy(newVertex + normalOffset, &vertexNormals[f * 3 + j],
|
|
cmod::VertexAttribute::getFormatSizeWords(cmod::VertexAttributeFormat::Float3) * sizeof(cmod::VWord));
|
|
}
|
|
}
|
|
|
|
// Create the Celestia mesh
|
|
cmod::Mesh newMesh;
|
|
newMesh.setVertexDescription(std::move(newDesc));
|
|
newMesh.setVertices(nFaces * 3, std::move(newVertexData));
|
|
|
|
std::uint32_t firstIndex = 0;
|
|
for (std::uint32_t groupIndex = 0; mesh.getGroup(groupIndex) != 0; ++groupIndex)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(groupIndex);
|
|
unsigned int faceCount = 0;
|
|
|
|
switch (group->prim)
|
|
{
|
|
case cmod::PrimitiveGroupType::TriList:
|
|
faceCount = group->indices.size() / 3;
|
|
break;
|
|
case cmod::PrimitiveGroupType::TriStrip:
|
|
case cmod::PrimitiveGroupType::TriFan:
|
|
faceCount = group->indices.size() - 2;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
|
|
// Create a trivial index list
|
|
std::vector<cmod::Index32> indices(faceCount * 3);
|
|
std::iota(indices.begin(), indices.end(), firstIndex);
|
|
|
|
newMesh.addGroup(cmod::PrimitiveGroupType::TriList,
|
|
mesh.getGroup(groupIndex)->materialIndex,
|
|
std::move(indices));
|
|
firstIndex += faceCount * 3;
|
|
}
|
|
|
|
return newMesh;
|
|
}
|
|
|
|
|
|
cmod::Mesh
|
|
GenerateTangents(const cmod::Mesh& mesh, bool weld)
|
|
{
|
|
uint32_t nVertices = mesh.getVertexCount();
|
|
|
|
// In order to generate tangents, we require positions, normals, and
|
|
// 2D texture coordinates in the vertex description.
|
|
const cmod::VertexDescription& desc = mesh.getVertexDescription();
|
|
if (desc.getAttribute(cmod::VertexAttributeSemantic::Position).format != cmod::VertexAttributeFormat::Float3)
|
|
{
|
|
std::cerr << "Vertex position must be a float3\n";
|
|
return cmod::Mesh();
|
|
}
|
|
|
|
if (desc.getAttribute(cmod::VertexAttributeSemantic::Normal).format != cmod::VertexAttributeFormat::Float3)
|
|
{
|
|
std::cerr << "float3 format vertex normal required\n";
|
|
return cmod::Mesh();
|
|
}
|
|
|
|
if (desc.getAttribute(cmod::VertexAttributeSemantic::Texture0).format == cmod::VertexAttributeFormat::InvalidFormat)
|
|
{
|
|
std::cerr << "Texture coordinates must be present in mesh to generate tangents\n";
|
|
return cmod::Mesh();
|
|
}
|
|
|
|
if (desc.getAttribute(cmod::VertexAttributeSemantic::Texture0).format != cmod::VertexAttributeFormat::Float2)
|
|
{
|
|
std::cerr << "Texture coordinate must be a float2\n";
|
|
return cmod::Mesh();
|
|
}
|
|
|
|
// Count the number of faces in the mesh.
|
|
// (All geometry should already converted to triangle lists)
|
|
std::uint32_t i;
|
|
std::uint32_t nFaces = 0;
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(i);
|
|
if (group->prim == cmod::PrimitiveGroupType::TriList)
|
|
{
|
|
assert(group->indices.size() % 3 == 0);
|
|
nFaces += group->indices.size() / 3;
|
|
}
|
|
else
|
|
{
|
|
std::cerr << "Mesh should contain just triangle lists\n";
|
|
return cmod::Mesh();
|
|
}
|
|
}
|
|
|
|
// Build the array of faces; this may require decomposing triangle strips
|
|
// and fans into triangle lists.
|
|
std::vector<Face> faces(nFaces);
|
|
|
|
std::uint32_t f = 0;
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(i);
|
|
|
|
switch (group->prim)
|
|
{
|
|
case cmod::PrimitiveGroupType::TriList:
|
|
{
|
|
for (uint32_t j = 0; j < group->indices.size() / 3; j++)
|
|
{
|
|
assert(f < nFaces);
|
|
faces[f].i[0] = group->indices[j * 3];
|
|
faces[f].i[1] = group->indices[j * 3 + 1];
|
|
faces[f].i[2] = group->indices[j * 3 + 2];
|
|
f++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
unsigned int stride = desc.strideBytes / sizeof(cmod::VWord);
|
|
std::uint32_t posOffset = desc.getAttribute(cmod::VertexAttributeSemantic::Position).offsetWords;
|
|
std::uint32_t texCoordOffset = desc.getAttribute(cmod::VertexAttributeSemantic::Texture0).offsetWords;
|
|
|
|
const cmod::VWord* vertexData = mesh.getVertexData();
|
|
|
|
// Compute tangents for faces
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
Eigen::Vector3f p0 = getVertex(vertexData, posOffset, stride, face.i[0]);
|
|
Eigen::Vector3f p1 = getVertex(vertexData, posOffset, stride, face.i[1]);
|
|
Eigen::Vector3f p2 = getVertex(vertexData, posOffset, stride, face.i[2]);
|
|
Eigen::Vector2f tc0 = getTexCoord(vertexData, texCoordOffset, stride, face.i[0]);
|
|
Eigen::Vector2f tc1 = getTexCoord(vertexData, texCoordOffset, stride, face.i[1]);
|
|
Eigen::Vector2f tc2 = getTexCoord(vertexData, texCoordOffset, stride, face.i[2]);
|
|
float s1 = tc1.x() - tc0.x();
|
|
float s2 = tc2.x() - tc0.x();
|
|
float t1 = tc1.y() - tc0.y();
|
|
float t2 = tc2.y() - tc0.y();
|
|
float a = s1 * t2 - s2 * t1;
|
|
if (a != 0.0f)
|
|
face.normal = (t2 * (p1 - p0) - t1 * (p2 - p0)) * (1.0f / a);
|
|
else
|
|
face.normal = Eigen::Vector3f::Zero();
|
|
}
|
|
|
|
// For each vertex, create a list of faces that contain it
|
|
std::uint32_t* faceCounts = new std::uint32_t[nVertices];
|
|
std::uint32_t** vertexFaces = new std::uint32_t*[nVertices];
|
|
|
|
// Initialize the lists
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
faceCounts[i] = 0;
|
|
vertexFaces[i] = nullptr;
|
|
}
|
|
|
|
// If we're welding vertices before generating normals, find identical
|
|
// points and merge them. Otherwise, the point indices will be the same
|
|
// as the attribute indices.
|
|
if (weld)
|
|
{
|
|
joinVertices(faces, vertexData, desc,
|
|
PointTexCoordOrderingPredicate(posOffset, texCoordOffset, true),
|
|
PointTexCoordEquivalencePredicate(posOffset, texCoordOffset, true, 1.0e-5f));
|
|
}
|
|
else
|
|
{
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
faces[f].vi[0] = faces[f].i[0];
|
|
faces[f].vi[1] = faces[f].i[1];
|
|
faces[f].vi[2] = faces[f].i[2];
|
|
}
|
|
}
|
|
|
|
// Count the number of faces in which each vertex appears
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
faceCounts[face.vi[0]]++;
|
|
faceCounts[face.vi[1]]++;
|
|
faceCounts[face.vi[2]]++;
|
|
}
|
|
|
|
// Allocate space for the per-vertex face lists
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
if (faceCounts[i] > 0)
|
|
{
|
|
vertexFaces[i] = new std::uint32_t[faceCounts[i] + 1];
|
|
vertexFaces[i][0] = faceCounts[i];
|
|
}
|
|
}
|
|
|
|
// Fill in the vertex/face lists
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
vertexFaces[face.vi[0]][faceCounts[face.vi[0]]--] = f;
|
|
vertexFaces[face.vi[1]][faceCounts[face.vi[1]]--] = f;
|
|
vertexFaces[face.vi[2]][faceCounts[face.vi[2]]--] = f;
|
|
}
|
|
|
|
// Compute the vertex tangents by averaging
|
|
std::vector<Eigen::Vector3f> vertexTangents(nFaces * 3);
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
for (std::uint32_t j = 0; j < 3; j++)
|
|
{
|
|
vertexTangents[f * 3 + j] =
|
|
averageFaceVectors(faces, f,
|
|
&vertexFaces[face.vi[j]][1],
|
|
vertexFaces[face.vi[j]][0],
|
|
0.0f);
|
|
}
|
|
}
|
|
|
|
// Create the new vertex description
|
|
cmod::VertexDescription newDesc = desc.clone();
|
|
augmentVertexDescription(newDesc, cmod::VertexAttributeSemantic::Tangent, cmod::VertexAttributeFormat::Float3);
|
|
|
|
// We need to convert the copy the old vertex attributes to the new
|
|
// mesh. In order to do this, we need the old offset of each attribute
|
|
// in the new vertex description. The fromOffsets array will contain
|
|
// this mapping.
|
|
std::uint32_t tangentOffset = 0;
|
|
std::uint32_t fromOffsets[16];
|
|
for (i = 0; i < newDesc.attributes.size(); i++)
|
|
{
|
|
fromOffsets[i] = ~0;
|
|
|
|
if (newDesc.attributes[i].semantic == cmod::VertexAttributeSemantic::Tangent)
|
|
{
|
|
tangentOffset = newDesc.attributes[i].offsetWords;
|
|
}
|
|
else
|
|
{
|
|
for (const auto& oldAttr : desc.attributes)
|
|
{
|
|
if (oldAttr.semantic == newDesc.attributes[i].semantic)
|
|
{
|
|
assert(oldAttr.format == newDesc.attributes[i].format);
|
|
fromOffsets[i] = oldAttr.offsetWords;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Copy the old vertex data along with the generated tangents to the
|
|
// new vertex data buffer.
|
|
unsigned int newStride = newDesc.strideBytes / sizeof(cmod::VWord);
|
|
std::vector<cmod::VWord> newVertexData(newStride * nFaces * 3);
|
|
for (f = 0; f < nFaces; f++)
|
|
{
|
|
Face& face = faces[f];
|
|
|
|
for (std::uint32_t j = 0; j < 3; j++)
|
|
{
|
|
cmod::VWord* newVertex = newVertexData.data() + (f * 3 + j) * newStride;
|
|
copyVertex(newVertex, newDesc,
|
|
vertexData, desc,
|
|
face.i[j],
|
|
fromOffsets);
|
|
std::memcpy(newVertex + tangentOffset, &vertexTangents[f * 3 + j], 3 * sizeof(float));
|
|
}
|
|
}
|
|
|
|
// Create the Celestia mesh
|
|
cmod::Mesh newMesh;
|
|
newMesh.setVertexDescription(std::move(newDesc));
|
|
newMesh.setVertices(nFaces * 3, std::move(newVertexData));
|
|
|
|
std::uint32_t firstIndex = 0;
|
|
for (std::uint32_t groupIndex = 0; mesh.getGroup(groupIndex) != 0; ++groupIndex)
|
|
{
|
|
const cmod::PrimitiveGroup* group = mesh.getGroup(groupIndex);
|
|
unsigned int faceCount = 0;
|
|
|
|
switch (group->prim)
|
|
{
|
|
case cmod::PrimitiveGroupType::TriList:
|
|
faceCount = group->indices.size() / 3;
|
|
break;
|
|
case cmod::PrimitiveGroupType::TriStrip:
|
|
case cmod::PrimitiveGroupType::TriFan:
|
|
faceCount = group->indices.size() - 2;
|
|
break;
|
|
default:
|
|
assert(0);
|
|
break;
|
|
}
|
|
|
|
// Create a trivial index list
|
|
std::vector<cmod::Index32> indices(faceCount * 3);
|
|
std::iota(indices.begin(), indices.end(), firstIndex);
|
|
|
|
newMesh.addGroup(cmod::PrimitiveGroupType::TriList,
|
|
mesh.getGroup(groupIndex)->materialIndex,
|
|
std::move(indices));
|
|
firstIndex += faceCount * 3;
|
|
}
|
|
|
|
// Clean up
|
|
delete[] faceCounts;
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
if (vertexFaces[i] != nullptr)
|
|
delete[] vertexFaces[i];
|
|
}
|
|
delete[] vertexFaces;
|
|
|
|
return newMesh;
|
|
}
|
|
|
|
|
|
bool
|
|
UniquifyVertices(cmod::Mesh& mesh)
|
|
{
|
|
std::uint32_t nVertices = mesh.getVertexCount();
|
|
const cmod::VertexDescription& desc = mesh.getVertexDescription();
|
|
|
|
if (nVertices == 0)
|
|
return false;
|
|
|
|
const cmod::VWord* vertexData = mesh.getVertexData();
|
|
if (vertexData == nullptr)
|
|
return false;
|
|
|
|
// Initialize the array of vertices
|
|
unsigned int stride = desc.strideBytes / sizeof(cmod::VWord);
|
|
std::vector<Vertex> vertices(nVertices);
|
|
std::uint32_t i;
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
vertices[i] = Vertex(i, vertexData + i * stride);
|
|
}
|
|
|
|
// Sort the vertices so that identical ones will be ordered consecutively
|
|
std::sort(vertices.begin(), vertices.end(), FullComparator(stride));
|
|
|
|
// Count the number of unique vertices
|
|
std::uint32_t uniqueVertexCount = 0;
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
if (i == 0 || !equal(vertices[i - 1], vertices[i], stride))
|
|
uniqueVertexCount++;
|
|
}
|
|
|
|
// No work left to do if we couldn't eliminate any vertices
|
|
if (uniqueVertexCount == nVertices)
|
|
return true;
|
|
|
|
// Build the vertex map and the uniquified vertex data
|
|
std::vector<std::uint32_t> vertexMap(nVertices);
|
|
std::vector<cmod::VWord> newVertexData(uniqueVertexCount * stride);
|
|
const cmod::VWord* oldVertexData = mesh.getVertexData();
|
|
std::uint32_t j = 0;
|
|
for (i = 0; i < nVertices; i++)
|
|
{
|
|
if (i == 0 || !equal(vertices[i - 1], vertices[i], stride))
|
|
{
|
|
if (i != 0)
|
|
j++;
|
|
assert(j < uniqueVertexCount);
|
|
std::memcpy(newVertexData.data() + j * stride,
|
|
oldVertexData + vertices[i].index * stride,
|
|
desc.strideBytes);
|
|
}
|
|
vertexMap[vertices[i].index] = j;
|
|
}
|
|
|
|
// Replace the vertex data with the compacted data
|
|
mesh.setVertices(uniqueVertexCount, std::move(newVertexData));
|
|
|
|
mesh.remapIndices(vertexMap);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// Merge all meshes that share the same vertex description
|
|
std::unique_ptr<cmod::Model>
|
|
MergeModelMeshes(const cmod::Model& model)
|
|
{
|
|
std::vector<const cmod::Mesh*> meshes;
|
|
|
|
for (std::uint32_t i = 0; model.getMesh(i) != nullptr; i++)
|
|
{
|
|
meshes.push_back(model.getMesh(i));
|
|
}
|
|
|
|
// Sort the meshes by vertex description
|
|
std::sort(meshes.begin(), meshes.end(),
|
|
[](const cmod::Mesh* a, const cmod::Mesh* b) { return a->getVertexDescription() < b->getVertexDescription(); });
|
|
|
|
auto newModel = std::make_unique<cmod::Model>();
|
|
|
|
// Copy materials into the new model
|
|
for (std::uint32_t i = 0; model.getMaterial(i) != nullptr; i++)
|
|
{
|
|
newModel->addMaterial(model.getMaterial(i)->clone());
|
|
}
|
|
|
|
std::uint32_t meshIndex = 0;
|
|
while (meshIndex < meshes.size())
|
|
{
|
|
const cmod::VertexDescription& desc = meshes[meshIndex]->getVertexDescription();
|
|
|
|
// Count the number of matching meshes
|
|
std::uint32_t nMatchingMeshes;
|
|
for (nMatchingMeshes = 1;
|
|
meshIndex + nMatchingMeshes < meshes.size();
|
|
nMatchingMeshes++)
|
|
{
|
|
if (!(meshes[meshIndex + nMatchingMeshes]->getVertexDescription() == desc))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Count the number of vertices in all matching meshes
|
|
std::uint32_t totalVertices = 0;
|
|
std::uint32_t j;
|
|
for (j = meshIndex; j < meshIndex + nMatchingMeshes; j++)
|
|
{
|
|
totalVertices += meshes[j]->getVertexCount();
|
|
}
|
|
|
|
unsigned int stride = desc.strideBytes / sizeof(cmod::VWord);
|
|
std::vector<cmod::VWord> vertexData(totalVertices * stride);
|
|
|
|
// Copy the vertex data
|
|
std::uint32_t vertexCount = 0;
|
|
for (j = meshIndex; j < meshIndex + nMatchingMeshes; ++j)
|
|
{
|
|
const cmod::Mesh* mesh = meshes[j];
|
|
std::memcpy(vertexData.data() + vertexCount * stride,
|
|
mesh->getVertexData(),
|
|
mesh->getVertexCount() * desc.strideBytes);
|
|
vertexCount += mesh->getVertexCount();
|
|
}
|
|
|
|
// Create the new empty mesh
|
|
cmod::Mesh mergedMesh;
|
|
mergedMesh.setVertexDescription(desc.clone());
|
|
mergedMesh.setVertices(totalVertices, std::move(vertexData));
|
|
|
|
// Reindex and add primitive groups
|
|
vertexCount = 0;
|
|
for (j = meshIndex; j < meshIndex + nMatchingMeshes; j++)
|
|
{
|
|
const cmod::Mesh* mesh = meshes[j];
|
|
for (std::uint32_t k = 0; mesh->getGroup(k) != nullptr; k++)
|
|
{
|
|
addGroupWithOffset(mergedMesh, *mesh->getGroup(k),
|
|
vertexCount);
|
|
}
|
|
|
|
vertexCount += mesh->getVertexCount();
|
|
}
|
|
assert(vertexCount == totalVertices);
|
|
|
|
newModel->addMesh(std::move(mergedMesh));
|
|
|
|
meshIndex += nMatchingMeshes;
|
|
}
|
|
|
|
return newModel;
|
|
}
|
|
|
|
|
|
/*! Generate normals for an entire model. Return the new model, or null if
|
|
* normal generation failed due to an out of memory error.
|
|
*/
|
|
std::unique_ptr<cmod::Model>
|
|
GenerateModelNormals(const cmod::Model& model, float smoothAngle, bool weldVertices, float weldTolerance)
|
|
{
|
|
auto newModel = std::make_unique<cmod::Model>();
|
|
|
|
// Copy materials
|
|
for (unsigned int i = 0; model.getMaterial(i) != nullptr; i++)
|
|
{
|
|
newModel->addMaterial(model.getMaterial(i)->clone());
|
|
}
|
|
|
|
bool ok = true;
|
|
for (unsigned int i = 0; model.getMesh(i) != nullptr; i++)
|
|
{
|
|
const cmod::Mesh* mesh = model.getMesh(i);
|
|
cmod::Mesh newMesh = GenerateNormals(*mesh, smoothAngle, weldVertices, weldTolerance);
|
|
if (newMesh.getVertexCount() == 0)
|
|
{
|
|
ok = false;
|
|
}
|
|
else
|
|
{
|
|
newModel->addMesh(std::move(newMesh));
|
|
}
|
|
}
|
|
|
|
if (!ok)
|
|
{
|
|
// If all of the meshes weren't processed due to an out of memory error,
|
|
// delete the new model and return nullptr rather than a partially processed
|
|
// model.
|
|
return nullptr;
|
|
}
|
|
|
|
return newModel;
|
|
}
|
|
|
|
|
|
#ifdef TRISTRIP
|
|
bool
|
|
ConvertToStrips(cmod::Mesh& mesh)
|
|
{
|
|
std::vector<Mesh::PrimitiveGroup*> groups;
|
|
|
|
// NvTriStrip library can only handle 16-bit indices
|
|
if (mesh.getVertexCount() >= 0x10000)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
// Verify that the mesh contains just tri strips
|
|
std::uint32_t i;
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
if (mesh.getGroup(i)->prim != cmod::Mesh::TriList)
|
|
return true;
|
|
}
|
|
|
|
// Convert the existing groups to triangle strips
|
|
for (i = 0; mesh.getGroup(i) != nullptr; i++)
|
|
{
|
|
const cmod::Mesh::PrimitiveGroup* group = mesh.getGroup(i);
|
|
|
|
// Convert the vertex indices to shorts for the TriStrip library
|
|
unsigned short* indices = new unsigned short[group->nIndices];
|
|
std::uint32_t j;
|
|
for (j = 0; j < group->nIndices; j++)
|
|
{
|
|
indices[j] = (unsigned short) group->indices[j];
|
|
}
|
|
|
|
PrimitiveGroup* strips = nullptr;
|
|
unsigned short nGroups;
|
|
bool r = GenerateStrips(indices,
|
|
group->nIndices,
|
|
&strips,
|
|
&nGroups,
|
|
false);
|
|
if (!r || strips == nullptr)
|
|
{
|
|
std::cerr << "Generate tri strips failed\n";
|
|
return false;
|
|
}
|
|
|
|
// Call the tristrip library to convert the lists to strips. Then,
|
|
// convert from the NvTriStrip's primitive group structure to the
|
|
// CMOD one and add it to the collection that will be added once
|
|
// the mesh's original primitive groups are cleared.
|
|
for (j = 0; j < nGroups; j++)
|
|
{
|
|
cmod::Mesh::PrimitiveGroupType prim = cmod::Mesh::InvalidPrimitiveGroupType;
|
|
switch (strips[j].type)
|
|
{
|
|
case PT_LIST:
|
|
prim = cmod::Mesh::TriList;
|
|
break;
|
|
case PT_STRIP:
|
|
prim = cmod::Mesh::TriStrip;
|
|
break;
|
|
case PT_FAN:
|
|
prim = cmod::Mesh::TriFan;
|
|
break;
|
|
}
|
|
|
|
if (prim != cmod::Mesh::InvalidPrimitiveGroupType &&
|
|
strips[j].numIndices != 0)
|
|
{
|
|
cmod::Mesh::PrimitiveGroup* newGroup = new cmod::Mesh::PrimitiveGroup();
|
|
newGroup->prim = prim;
|
|
newGroup->materialIndex = group->materialIndex;
|
|
newGroup->nIndices = strips[j].numIndices;
|
|
newGroup->indices = new uint32_t[newGroup->nIndices];
|
|
for (uint32_t k = 0; k < newGroup->nIndices; k++)
|
|
newGroup->indices[k] = strips[j].indices[k];
|
|
|
|
groups.push_back(newGroup);
|
|
}
|
|
}
|
|
|
|
delete[] strips;
|
|
}
|
|
|
|
mesh.clearGroups();
|
|
|
|
// Add the stripified groups to the mesh
|
|
for (auto iter = groups.begin(); iter != groups.end(); iter++)
|
|
{
|
|
mesh.addGroup(*iter);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
#endif
|