[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [48669] branches/soc-2012-bratwurst/source /blender/blenlib: Utility function, project point along vector to plane.

[Antony Riakiotakis]

Revision: 48669
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=48669
Author:   psy-fi
Date:     2012-07-06 01:39:27 +0000 (Fri, 06 Jul 2012)
Log Message:
-----------
Utility function, project point along vector to plane. will be needed
for uv transform correction.

Modified Paths:
--------------
    branches/soc-2012-bratwurst/source/blender/blenlib/BLI_math_vector.h
    branches/soc-2012-bratwurst/source/blender/blenlib/intern/math_vector.c

Modified: branches/soc-2012-bratwurst/source/blender/blenlib/BLI_math_vector.h
===================================================================
--- branches/soc-2012-bratwurst/source/blender/blenlib/BLI_math_vector.h	2012-07-06 00:33:09 UTC (rev 48668)
+++ branches/soc-2012-bratwurst/source/blender/blenlib/BLI_math_vector.h	2012-07-06 01:39:27 UTC (rev 48669)
@@ -203,6 +203,7 @@
 void project_v2_v2v2(float c[2], const float v1[2], const float v2[2]);
 void project_v3_v3v3(float r[3], const float p[3], const float n[3]);
 void project_v3_plane(float v[3], const float n[3], const float p[3]);
+void project_v3_v3_plane(float v[3], const float v2[3], const float n[3], const float p[3]);
 void reflect_v3_v3v3(float r[3], const float v[3], const float n[3]);
 void ortho_basis_v3v3_v3(float r1[3], float r2[3], const float a[3]);
 void bisect_v3_v3v3v3(float r[3], const float a[3], const float b[3], const float c[3]);

Modified: branches/soc-2012-bratwurst/source/blender/blenlib/intern/math_vector.c
===================================================================
--- branches/soc-2012-bratwurst/source/blender/blenlib/intern/math_vector.c	2012-07-06 00:33:09 UTC (rev 48668)
+++ branches/soc-2012-bratwurst/source/blender/blenlib/intern/math_vector.c	2012-07-06 01:39:27 UTC (rev 48669)
@@ -338,6 +338,20 @@
 	sub_v3_v3(v, vector);
 }
 
+/* project vector along the direction of v2 on a plane defined by normal and a plane point p */
+void project_v3_v3_plane(float v[3], const float v2[3], const float n[3], const float p[3])
+{
+	float vector[3];
+	float mul;
+
+	sub_v3_v3v3(vector, v, p);
+	mul = dot_v3v3(vector, n)/dot_v3v3(v2, n);
+
+	mul_v3_v3fl(vector, v2, mul);
+	sub_v3_v3(v, vector);
+}
+
+
 /* Returns a vector bisecting the angle at v2 formed by v1, v2 and v3 */
 void bisect_v3_v3v3v3(float out[3], const float v1[3], const float v2[3], const float v3[3])
 {