move polygon intersection out of BLI_lasso into BLI_math_geom since its a generally useful function.

adds:
- isect_point_poly_v2()
- isect_point_poly_v2_int()

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h
index bc82b7e393b..94fa88801f0 100644
--- a/source/blender/blenlib/BLI_math_geom.h
+++ b/source/blender/blenlib/BLI_math_geom.h
@@ -135,13 +135,15 @@ int isect_ray_tri_epsilon_v3(const float p1[3], const float d[3],
                              const float v0[3], const float v1[3], const float v2[3], float *r_lambda, float r_uv[2], const float epsilon);
 
 /* point in polygon */
+bool isect_point_poly_v2(const float pt[2], const float verts[][2], const int nr);
+bool isect_point_poly_v2_int(const int pt[2], const int verts[][2], const int nr);
+
 int isect_point_quad_v2(const float p[2], const float a[2], const float b[2], const float c[2], const float d[2]);
 
 int isect_point_tri_v2(const float pt[2], const float v1[2], const float v2[2], const float v3[2]);
 int isect_point_tri_v2_cw(const float pt[2], const float v1[2], const float v2[2], const float v3[2]);
 int isect_point_tri_v2_int(const int x1, const int y1, const int x2, const int y2, const int a, const int b);
 int isect_point_tri_prism_v3(const float p[3], const float v1[3], const float v2[3], const float v3[3]);
-
 void isect_point_quad_uv_v2(const float v0[2], const float v1[2], const float v2[2], const float v3[2],
                             const float pt[2], float r_uv[2]);
 void isect_point_face_uv_v2(const int isquad, const float v0[2], const float v1[2], const float v2[2],