==Python API==

Blender.Geometry.ClosestPointOnLine(pt, vec1, vec2) -> (pt, lambda)
This wraps lambda_cp_line_ex

Needed for experemental tree generator

source/blender/blenlib/BLI_arithb.h

@@ -360,6 +360,8 @@ void spheremap(float x, float y, float z, float *u, float *v);
 int LineIntersectsTriangle(float p1[3], float p2[3], float v0[3], float v1[3], float v2[3], float *lambda);
 int point_in_tri_prism(float p[3], float v1[3], float v2[3], float v3[3]);
 
+float lambda_cp_line_ex(float p[3], float l1[3], float l2[3], float cp[3]);
+
 typedef struct DualQuat {
 	float quat[4];
 	float trans[4];