diff options
Diffstat (limited to 'src/polyset.cc')
| -rw-r--r-- | src/polyset.cc | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/polyset.cc b/src/polyset.cc index 7110f95..83c1cfc 100644 --- a/src/polyset.cc +++ b/src/polyset.cc @@ -25,6 +25,9 @@ #include "printutils.h" #include "Preferences.h" +#include <Eigen/Core> +#include <Eigen/LU> + QCache<QString,PolySet::ps_cache_entry> PolySet::ps_cache(100); PolySet::ps_cache_entry::ps_cache_entry(PolySet *ps) : @@ -129,10 +132,11 @@ static void gl_draw_triangle(GLint *shaderinfo, const PolySet::Point *p0, const void PolySet::render_surface(colormode_e colormode, csgmode_e csgmode, double *m, GLint *shaderinfo) const { - double m_scale_rotate_det = - m[0]*m[5]*m[10] + m[4]*m[9]*m[2] + m[8]*m[1]*m[6] - - (m[8]*m[5]*m[2] + m[4]*m[1]*m[10] + m[0]*m[9]*m[6]); - bool mirrored = m_scale_rotate_det < 0; + Eigen::Matrix3f m3f; + m3f << m[0], m[4], m[8], + m[1], m[5], m[9], + m[2], m[6], m[10]; + bool mirrored = m3f.determinant() < 0; if (colormode == COLORMODE_MATERIAL) { const QColor &col = Preferences::inst()->color(Preferences::OPENCSG_FACE_FRONT_COLOR); |