------------------------------------------------------------------------------
| 169 | |
| 170 | //------------------------------------------------------------------------------ |
| 171 | int vtkPixel::ComputeNormal(double n[3]) |
| 172 | { |
| 173 | double p0[3], p1[3], p2[3]; |
| 174 | this->Points->GetPoint(0, p0); |
| 175 | this->Points->GetPoint(1, p1); |
| 176 | this->Points->GetPoint(2, p2); |
| 177 | p1[0] -= p0[0]; |
| 178 | p1[1] -= p0[1]; |
| 179 | p1[2] -= p0[2]; |
| 180 | p2[0] -= p0[0]; |
| 181 | p2[1] -= p0[1]; |
| 182 | p2[2] -= p0[2]; |
| 183 | vtkMath::Cross(p1, p2, n); |
| 184 | if (std::abs(n[0]) < VTK_DBL_EPSILON && std::abs(n[1]) < VTK_DBL_EPSILON && |
| 185 | std::abs(n[2]) < VTK_DBL_EPSILON) |
| 186 | { |
| 187 | return -1; |
| 188 | } |
| 189 | vtkMath::Normalize(n); |
| 190 | return (std::abs(n[1]) > 0.5) + (std::abs(n[2]) > 0.5) * 2; |
| 191 | } |
| 192 | |
| 193 | //---------------------------------------------------------------------------- |
| 194 | int vtkPixel::Inflate(double dist) |