QPickTriangleEvent类具有uvw属性。它是什么? uvw
是三角形的法线向量吗?
我记录了QPickTriangleEvent属性:
Qt3DRender::QPickTriangleEvent *eventTri = static_cast<Qt3DRender::QPickTriangleEvent *>(event);
qDebug() << "Triangle Index: " << eventTri->triangleIndex();
qDebug() << "Triangle Vertex 1: " << eventTri->vertex1Index();
qDebug() << "Triangle Vertex 2: " << eventTri->vertex2Index();
qDebug() << "Triangle Vertex 3: " << eventTri->vertex3Index();
qDebug() << "Triangle UVW: " << eventTri->uvw();
输出:
Triangle Index: 79540
Triangle Vertex 1: 238620
Triangle Vertex 2: 238621
Triangle Vertex 3: 238622
Triangle UVW: QVector3D(0.0390438, 0.151772, 0.809184)
即使检查输出,我也无法弄清楚uvw
。是三角形的法线向量吗?
我正在检查以下源代码,以弄清uvw
是什么:
答案 0 :(得分:0)
在源代码triangleboundingvolume.cpp中被注释:
// RealTime Collision Detection page 192
bool intersectsSegmentTriangle(const RayCasting::QRay3D &ray, ...
第193页的the book条评论
...还返回交点s,...的重心坐标(u,v,w)...
和第194
页...段在位置s处的距离t处与tri相交(s = u A + v B + w * C)...