Fix T44780: Decimate planar creates concave edges

Float precision was causing problems for decimate,
small faces that create a nearly flat surface were detected as having no 'cost' to collapse.

1 files changed, 7 insertions, 7 deletions

diff --git a/source/blender/blenlib/BLI_quadric.h b/source/blender/blenlib/BLI_quadric.h
index 251469ab88f..eaf9c7a0738 100644
--- a/source/blender/blenlib/BLI_quadric.h
+++ b/source/blender/blenlib/BLI_quadric.h
@@ -31,14 +31,14 @@
  */
 
 typedef struct Quadric {
-	float a2, ab, ac, ad,
-	          b2, bc, bd,
-	              c2, cd,
-	                  d2;
+	double a2, ab, ac, ad,
+	           b2, bc, bd,
+	               c2, cd,
+	                   d2;
 } Quadric;
 
 /* conversion */
-void  BLI_quadric_from_plane(Quadric *q, const float v[4]);
+void  BLI_quadric_from_plane(Quadric *q, const double v[4]);
 void  BLI_quadric_to_tensor_m3(const Quadric *q, float m[3][3]);
 void  BLI_quadric_to_vector_v3(const Quadric *q, float v[3]);
 
@@ -47,10 +47,10 @@ void  BLI_quadric_clear(Quadric *q);
 /* math */
 void  BLI_quadric_add_qu_qu(Quadric *a, const Quadric *b);
 void  BLI_quadric_add_qu_ququ(Quadric *r, const Quadric *a, const Quadric *b);
-void  BLI_quadric_mul(Quadric *a, const float scalar);
+void  BLI_quadric_mul(Quadric *a, const double scalar);
 
 /* solve */
-float BLI_quadric_evaluate(const Quadric *q, const float v[3]);
+double BLI_quadric_evaluate(const Quadric *q, const float v_fl[3]);
 bool  BLI_quadric_optimize(const Quadric *q, float v[3], const float epsilon);
 
 #endif /* __BLI_QUADRIC_H__ */