Use curve radius for paths

- use_radius option, off by default for 2.4x files, on by default on new curves.
- curve deform modifiers (think tentacles)
- follow path (parent mode and constraint)
- curve guides
- added back Alt+S to scale point radius
- Mat3Scale and Mat4Scale arithb.c functions to make a new uniform scale matrix.

- TODO, effectors, looks like they have no way to scale from the radius yet.

2 files changed, 23 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_arithb.h b/source/blender/blenlib/BLI_arithb.h
index 40076755fa0..c2d707f60f0 100644
--- a/source/blender/blenlib/BLI_arithb.h
+++ b/source/blender/blenlib/BLI_arithb.h
@@ -320,6 +320,9 @@ void Mat3Clr(float *m);
 void Mat3One(float m[][3]);
 void Mat4One(float m[][4]);
 
+void Mat3Scale(float m[][3], float scale);
+void Mat4Scale(float m[][4], float scale);
+
 void Mat3Ortho(float mat[][3]);
 void Mat4Ortho(float mat[][4]);
 
diff --git a/source/blender/blenlib/intern/arithb.c b/source/blender/blenlib/intern/arithb.c
index 9a05cd75ad0..9e769e19674 100644
--- a/source/blender/blenlib/intern/arithb.c
+++ b/source/blender/blenlib/intern/arithb.c
@@ -854,6 +854,26 @@ void Mat3One(float m[][3])
 	m[2][0]= m[2][1]= 0.0;
 }
 
+void Mat4Scale(float m[][4], float scale)
+{
+
+	m[0][0]= m[1][1]= m[2][2]= scale;
+	m[3][3]= 1.0;
+	m[0][1]= m[0][2]= m[0][3]= 0.0;
+	m[1][0]= m[1][2]= m[1][3]= 0.0;
+	m[2][0]= m[2][1]= m[2][3]= 0.0;
+	m[3][0]= m[3][1]= m[3][2]= 0.0;
+}
+
+void Mat3Scale(float m[][3], float scale)
+{
+
+	m[0][0]= m[1][1]= m[2][2]= scale;
+	m[0][1]= m[0][2]= 0.0;
+	m[1][0]= m[1][2]= 0.0;
+	m[2][0]= m[2][1]= 0.0;
+}
+
 void Mat4MulVec( float mat[][4], int *vec)
 {
 	int x,y;