void generate(size_t start, size_t end) const
{
float* nodes = m_Nodes->getPointer(0);
int64_t* triangles = m_Triangles->getPointer(0);
for (size_t i = start; i < end; i++)
{
m_Centroids[i * 3] = (nodes[triangles[i * 3] * 3 + 0] + nodes[triangles[i * 3 + 1] * 3 + 0] + nodes[triangles[i * 3 + 2] * 3 + 0]) / 3.0;
m_Centroids[i * 3 + 1] = (nodes[triangles[i * 3] * 3 + 1] + nodes[triangles[i * 3 + 1] * 3 + 1] + nodes[triangles[i * 3 + 2] * 3 + 1]) / 3.0;
m_Centroids[i * 3 + 2] = (nodes[triangles[i * 3] * 3 + 2] + nodes[triangles[i * 3 + 1] * 3 + 2] + nodes[triangles[i * 3 + 2] * 3 + 2]) / 3.0;
}
}
void generate(size_t start, size_t end) const
{
int64_t* triangles = m_Triangles->getPointer(0);
for (size_t i = start; i < end; i++)
{
// Swap the indices
int64_t nId0 = triangles[i * 3 + 0];
int64_t nId2 = triangles[i * 3 + 2];
triangles[i * 3 + 0] = nId2;
triangles[i * 3 + 2] = nId0;
}
}
void generate(size_t start, size_t end) const
{
float* nodes = m_Nodes->getPointer(0);
int64_t* triangles = m_Triangles->getPointer(0);
int64_t nIdx0 = 0, nIdx1 = 0, nIdx2 = 0;
for (size_t i = start; i < end; i++)
{
nIdx0 = triangles[i * 3] * 3;
nIdx1 = triangles[i * 3 + 1] * 3;
nIdx2 = triangles[i * 3 + 2] * 3;
float* n0 = &(nodes[nIdx0]);
float* n1 = &(nodes[nIdx1]);
float* n2 = &(nodes[nIdx2]);
VectorType normal = TriangleOps::computeNormal(n0, n1, n2);
m_Normals[i * 3 + 0] = normal.x;
m_Normals[i * 3 + 1] = normal.y;
m_Normals[i * 3 + 2] = normal.z;
}
}
void generate(size_t start, size_t end) const
{
int64_t* triangles = m_Triangles->getPointer(0);
int64_t nIdx0 = 0, nIdx1 = 0, nIdx2 = 0;
float vecA[3] = { 0.0f, 0.0f, 0.0f };
float vecB[3] = { 0.0f, 0.0f, 0.0f };
float cross[3] = { 0.0f, 0.0f, 0.0f };
for (size_t i = start; i < end; i++)
{
nIdx0 = triangles[i * 3];
nIdx1 = triangles[i * 3 + 1];
nIdx2 = triangles[i * 3 + 2];
float* A = m_Nodes->getPointer(nIdx0 * 3);
float* B = m_Nodes->getPointer(nIdx1 * 3);
float* C = m_Nodes->getPointer(nIdx2 * 3);
MatrixMath::Subtract3x1s(A, B, vecA);
MatrixMath::Subtract3x1s(A, C, vecB);
MatrixMath::CrossProduct(vecA, vecB, cross);
float area = 0.5f * MatrixMath::Magnitude3x1(cross);
m_Areas[i] = area;
}
}
