C++ 与Carve CSG c和x2B的问题+；。结果中包含错误的顶点
您好，我对Carve有一个问题，但我不确定这是因为它的实现还是我对它的使用 这是一个单独的代码，它展示了我的问题。本质上，我得到了错误的结果，或者更具体地说，我在结果C++ 与Carve CSG c和x2B的问题+；。结果中包含错误的顶点,c++,geometry,csg,carve,C++,Geometry,Csg,Carve,您好，我对Carve有一个问题，但我不确定这是因为它的实现还是我对它的使用 这是一个单独的代码，它展示了我的问题。本质上，我得到了错误的结果，或者更具体地说，我在结果顶点存储中得到了错误的顶点。该顶点也包含在面索引中，因此“雕刻”似乎具有。我已经手动调试并绘制了所有面，因此我确定不应包括该顶点 不应高亮显示包含的顶点 生成的网格显然是错误的。更详细地检查它，vertex_存储中有一个错误点，即（150150,0） 由此生成的三角形包括错误的顶点o.0 这是一个非常基本的差分操作，我读到carv
顶点存储中得到了错误的顶点。该顶点也包含在面索引中，因此“雕刻”似乎具有。我已经手动调试并绘制了所有面，因此我确定不应包括该顶点
不应高亮显示包含的顶点
生成的网格显然是错误的。更详细地检查它，vertex_存储中有一个错误点，即（150150,0）
由此生成的三角形包括错误的顶点o.0
这是一个非常基本的差分操作，我读到carve有一些问题，但我没想到它会像这样使用2个基本网格（2个长方体），这让我认为这是我做错的事情
同样令人沮丧的是，当为面6（网格集0）调试（我假设有种子/prng）时，我得到了相同的顶点，但几乎总是不同的顺序
这是证明问题的来源
#include <carve\mesh.hpp>
#include <carve\csg.hpp>
#include <carve\input.hpp>
#include <Windows.h>
struct MyVector3
{
MyVector3(float x, float y, float z)
: x_(x), y_(y), z_(z)
{
}
float x_;
float y_;
float z_;
};
struct MyVertex
{
MyVertex(unsigned int pointIndex)
: p_(pointIndex)
{
}
unsigned int p_;
// n_, uv_ etc left out for covienience
};
struct MyTriangle
{
MyTriangle(unsigned int a, unsigned int b, unsigned int c)
: a_(a), b_(b), c_(c)
{
}
unsigned int a_;
unsigned int b_;
unsigned int c_;
};
struct MyMesh
{
std::vector<MyVector3> points_;
std::vector<MyTriangle> triangles_;
std::vector<MyVertex> vertices_;
};
carve::mesh::MeshSet<3U>* GetCarveMesh(const MyMesh& originalMesh)
{
carve::input::PolyhedronData data;
for (unsigned int v = 0; v < originalMesh.vertices_.size(); ++v)
{
const MyVector3& point = originalMesh.points_[originalMesh.vertices_[v].p_];
data.addVertex(carve::geom::VECTOR(point.x_, point.y_, point.z_));
}
for (unsigned int t = 0; t < originalMesh.triangles_.size(); t++)
{
const MyTriangle& tri = originalMesh.triangles_[t];
const MyVertex& a = originalMesh.vertices_[tri.a_];
const MyVertex& b = originalMesh.vertices_[tri.b_];
const MyVertex& c = originalMesh.vertices_[tri.c_];
data.addFace(a.p_, b.p_, c.p_);
}
return data.createMesh(carve::input::Options());
}
std::list<std::shared_ptr<MyMesh>> GetMyMesh(carve::mesh::MeshSet<3U>* carveMesh)
{
std::list<std::shared_ptr<MyMesh>> result;
unsigned int meshStart = 0;
unsigned int meshEnd = carveMesh->meshes.size();
for (unsigned int ms = meshStart; ms < meshEnd; ++ms)
{
// For each mesh, construct the faces and add the points as we do.
result.push_back(std::shared_ptr<MyMesh>());
{
std::ostringstream oss;
oss << "mesh " << ms << " has " << carveMesh->meshes[ms]->faces.size() << " faces.\n";
OutputDebugString(oss.str().c_str());
}
unsigned int faceStart = 0;
unsigned int faceEnd = carveMesh->meshes[ms]->faces.size();
for (unsigned int f = faceStart; f < faceEnd; ++f)
{
//if (f == 10 || f == 11 || f == 6)
// continue;
unsigned int vertexCount = carveMesh->meshes[ms]->faces[f]->n_edges;
std::vector<MyVector3> points;
points.reserve(vertexCount);
std::ostringstream oss;
oss << " - face " << f << "(" << vertexCount << ") :\n";
// add each edge in this face... more than 3, then we need to tessellate
carve::mesh::Edge<3>* currentEdge = carveMesh->meshes[ms]->faces[f]->edge;
for (unsigned int e = 0; e < vertexCount; ++e)
{
MyVector3 point(static_cast<float>(currentEdge->vert->v[0]), static_cast<float>(currentEdge->vert->v[1]), static_cast<float>(currentEdge->vert->v[2]));
points.push_back(point);
oss << "[" << e << ":" << point.x_ << ", " << point.y_ << ", " << point.z_ << "]";
oss << "\n";
currentEdge = currentEdge->next;
}
OutputDebugString(oss.str().c_str());
// ... Other operations, tessellation etc
}
}
return result;
}
int main(int argc, char** argv)
{
// define myMeshA
MyMesh myMeshA;
myMeshA.points_.push_back(MyVector3(-150.0f, -150.0f, 0));
myMeshA.points_.push_back(MyVector3(-150.0f, -150.0f, 2800.0f));
myMeshA.points_.push_back(MyVector3(150.0f, 150.0f, 0));
myMeshA.points_.push_back(MyVector3(150.0f, 150.0f, 2800.0f));
myMeshA.points_.push_back(MyVector3(3430.0f, -150.0f, 0));
myMeshA.points_.push_back(MyVector3(3430.0f, -150.0f, 2800.0f));
myMeshA.points_.push_back(MyVector3(3730.0f, 150.0f, 0));
myMeshA.points_.push_back(MyVector3(3730.0f, 150.0f, 2800.0f));
myMeshA.vertices_.push_back(MyVertex(0));
myMeshA.vertices_.push_back(MyVertex(1));
myMeshA.vertices_.push_back(MyVertex(2));
myMeshA.vertices_.push_back(MyVertex(3));
myMeshA.vertices_.push_back(MyVertex(4));
myMeshA.vertices_.push_back(MyVertex(5));
myMeshA.vertices_.push_back(MyVertex(6));
myMeshA.vertices_.push_back(MyVertex(7));
myMeshA.triangles_.push_back(MyTriangle(0, 1, 3));
myMeshA.triangles_.push_back(MyTriangle(3, 2, 0));
myMeshA.triangles_.push_back(MyTriangle(2, 3, 7));
myMeshA.triangles_.push_back(MyTriangle(7, 6, 2));
myMeshA.triangles_.push_back(MyTriangle(6, 7, 5));
myMeshA.triangles_.push_back(MyTriangle(5, 4, 6));
myMeshA.triangles_.push_back(MyTriangle(4, 5, 1));
myMeshA.triangles_.push_back(MyTriangle(1, 0, 4));
myMeshA.triangles_.push_back(MyTriangle(2, 4, 0));
myMeshA.triangles_.push_back(MyTriangle(4, 2, 6));
myMeshA.triangles_.push_back(MyTriangle(3, 5, 1));
myMeshA.triangles_.push_back(MyTriangle(5, 3, 7));
// define myMeshB
MyMesh myMeshB;
myMeshB.points_.push_back(MyVector3(0, 0, 0));
myMeshB.points_.push_back(MyVector3(0, 0, 2100.0f));
myMeshB.points_.push_back(MyVector3(0, 300.0f, 0));
myMeshB.points_.push_back(MyVector3(0, 300.0f, 2100.0f));
myMeshB.points_.push_back(MyVector3(930.0f, 0, 0));
myMeshB.points_.push_back(MyVector3(930.0f, 0, 2100.0f));
myMeshB.points_.push_back(MyVector3(930.0f, 300.0f, 0));
myMeshB.points_.push_back(MyVector3(930.0f, 300.0f, 2100.0f));
myMeshB.vertices_.push_back(MyVertex(0));
myMeshB.vertices_.push_back(MyVertex(1));
myMeshB.vertices_.push_back(MyVertex(2));
myMeshB.vertices_.push_back(MyVertex(3));
myMeshB.vertices_.push_back(MyVertex(4));
myMeshB.vertices_.push_back(MyVertex(5));
myMeshB.vertices_.push_back(MyVertex(6));
myMeshB.vertices_.push_back(MyVertex(7));
myMeshB.triangles_.push_back(MyTriangle(0, 1, 3));
myMeshB.triangles_.push_back(MyTriangle(3, 2, 0));
myMeshB.triangles_.push_back(MyTriangle(2, 3, 7));
myMeshB.triangles_.push_back(MyTriangle(7, 6, 2));
myMeshB.triangles_.push_back(MyTriangle(6, 7, 5));
myMeshB.triangles_.push_back(MyTriangle(5, 4, 6));
myMeshB.triangles_.push_back(MyTriangle(4, 5, 1));
myMeshB.triangles_.push_back(MyTriangle(1, 0, 4));
myMeshB.triangles_.push_back(MyTriangle(2, 4, 0));
myMeshB.triangles_.push_back(MyTriangle(4, 2, 6));
myMeshB.triangles_.push_back(MyTriangle(3, 5, 1));
myMeshB.triangles_.push_back(MyTriangle(5, 3, 7));
std::unique_ptr<carve::mesh::MeshSet<3U>> meshA(GetCarveMesh(myMeshA));
std::unique_ptr<carve::mesh::MeshSet<3U>> meshB(GetCarveMesh(myMeshB));
carve::csg::CSG csg;
std::unique_ptr<carve::mesh::MeshSet<3U>> carveResult(csg.compute(meshA.get(), meshB.get(), carve::csg::CSG::OP::A_MINUS_B));
std::list<std::shared_ptr<MyMesh>> result = GetMyMesh(carveResult.get());
return 0;
}
在面顶点的关联输出中。veretx（150150,0）不应包括在内，但如您所见，它包含在3个面中。。。（面6、10和11）。这会导致不正确的细分
这是怎么回事？这是我使用雕刻的方式，还是雕刻本身的问题。任何帮助都将不胜感激：）我想知道这个问题是否因为没有人知道你在问什么而没有得到足够的重视？我知道问题在于，一个额外的顶点最终进入了顶点存储
（不管是什么），但为什么该顶点不应该进入顶点存储
？你想干什么？你直接跳到了一个特定的问题上，没有提供上下文。另外，是否没有办法简化该示例代码？要看的东西很多。如果里面藏着一个简单的打字错误，我也不会感到惊讶。
00000020 8.55740356 [12284] mesh 0 has 14 faces.
00000021 8.55764484 [12284] - face 0(6) :
00000022 8.55764484 [12284] [0:-150, -150, 0]
00000023 8.55764484 [12284] [1:-150, -150, 2800]
00000024 8.55764484 [12284] [2:150, 150, 2800]
00000025 8.55764484 [12284] [3:75, 75, 2100]
00000026 8.55764484 [12284] [4:0, 0, 2100]
00000027 8.55764484 [12284] [5:0, 0, 1400]
00000028 8.55826759 [12284] - face 1(3) :
00000029 8.55826759 [12284] [0:0, 0, 0]
00000030 8.55826759 [12284] [1:-150, -150, 0]
00000031 8.55826759 [12284] [2:0, 0, 1400]
00000032 8.55878353 [12284] - face 2(3) :
00000033 8.55878353 [12284] [0:-150, -150, 2800]
00000034 8.55878353 [12284] [1:-150, -150, 0]
00000035 8.55878353 [12284] [2:3430, -150, 0]
00000036 8.55926609 [12284] - face 3(3) :
00000037 8.55926609 [12284] [0:150, 150, 2800]
00000038 8.55926609 [12284] [1:150, 150, 2100]
00000039 8.55926609 [12284] [2:75, 75, 2100]
00000040 8.55982780 [12284] - face 4(5) :
00000041 8.55982780 [12284] [0:930, 78.6585, 0]
00000042 8.55982780 [12284] [1:3430, -150, 0]
00000043 8.55982780 [12284] [2:-150, -150, 0]
00000044 8.55982780 [12284] [3:0, 0, 0]
00000045 8.55982780 [12284] [4:930, 0, 0]
00000046 8.56040192 [12284] - face 5(3) :
00000047 8.56040192 [12284] [0:3430, -150, 0]
00000048 8.56040192 [12284] [1:3430, -150, 2800]
00000049 8.56040192 [12284] [2:-150, -150, 2800]
00000050 8.56112003 [12284] - face 6(13) :
00000051 8.56112003 [12284] [0:930, 150, 2100]
00000052 8.56112003 [12284] [1:465, 150, 2100]
00000053 8.56112003 [12284] [2:150, 150, 2100]
00000054 8.56112003 [12284] [3:150, 150, 2800]
00000055 8.56112003 [12284] [4:3730, 150, 2800]
00000056 8.56112003 [12284] [5:930, 150, 610.056]
00000057 8.56112003 [12284] [6:930, 150, 1050]
00000058 8.56112003 [12284] [7:930, 150, 2100]
00000059 8.56112003 [12284] [8:930, 150, 1050]
00000060 8.56112003 [12284] [9:930, 150, 610.056]
00000061 8.56112003 [12284] [10:150, 150, 0]
00000062 8.56112003 [12284] [11:150, 150, 2100]
00000063 8.56112003 [12284] [12:465, 150, 2100]
00000064 8.56189060 [12284] - face 7(4) :
00000065 8.56189060 [12284] [0:930, 150, 0]
00000066 8.56189060 [12284] [1:3730, 150, 0]
00000067 8.56189060 [12284] [2:3430, -150, 0]
00000068 8.56189060 [12284] [3:930, 78.6585, 0]
00000069 8.56240559 [12284] - face 8(3) :
00000070 8.56240559 [12284] [0:3430, -150, 2800]
00000071 8.56240559 [12284] [1:3430, -150, 0]
00000072 8.56240559 [12284] [2:3730, 150, 0]
00000073 8.56300354 [12284] - face 9(4) :
00000074 8.56300354 [12284] [0:930, 150, 610.056]
00000075 8.56300354 [12284] [1:3730, 150, 2800]
00000076 8.56300354 [12284] [2:3730, 150, 0]
00000077 8.56300354 [12284] [3:930, 150, 0]
00000078 8.56469250 [12284] - face 10(4) :
00000079 8.56469250 [12284] [0:930, 150, 0]
00000080 8.56469250 [12284] [1:465, 150, 0]
00000081 8.56469250 [12284] [2:150, 150, 0]
00000082 8.56469250 [12284] [3:930, 150, 610.056]
00000083 8.56473637 [12284] - face 11(5) :
00000084 8.56473637 [12284] [0:150, 150, 2100]
00000085 8.56473637 [12284] [1:150, 150, 0]
00000086 8.56473637 [12284] [2:0, 0, 0]
00000087 8.56473637 [12284] [3:0, 0, 1400]
00000088 8.56473637 [12284] [4:75, 75, 2100]
00000089 8.56530762 [12284] - face 12(3) :
00000090 8.56530762 [12284] [0:3730, 150, 0]
00000091 8.56530762 [12284] [1:3730, 150, 2800]
00000092 8.56530762 [12284] [2:3430, -150, 2800]
00000093 8.56581879 [12284] - face 13(3) :
00000094 8.56581879 [12284] [0:75, 75, 2100]
00000095 8.56581879 [12284] [1:0, 0, 1400]
00000096 8.56581879 [12284] [2:0, 0, 2100]
00000097 8.56697178 [12284] mesh 1 has 2 faces.
00000098 8.56711102 [12284] - face 0(3) :
00000099 8.56711102 [12284] [0:150, 150, 2800]
00000100 8.56711102 [12284] [1:3430, -150, 2800]
00000101 8.56711102 [12284] [2:-150, -150, 2800]
00000102 8.56761074 [12284] - face 1(3) :
00000103 8.56761074 [12284] [0:3430, -150, 2800]
00000104 8.56761074 [12284] [1:150, 150, 2800]
00000105 8.56761074 [12284] [2:3730, 150, 2800]