Bevel Factor Mapping

Bevel Factor Mapping allows to control the relation between bevel factors
(number between 0 and 1) and the rendered start and end point of a beveled
spline.

There are three options: "Resolution", "Segments", "Spline". "Resolution"
option maps bevel factors as it was done < 2.71, "Spline" and "Segments"
are new.

* "Resolution“: Map the bevel factor to the number of subdivisions of a
  spline (U resolution).
* "Segments“: Map the bevel factor to the length of a segment and to the
  number of subdivisions of a segment.
* "Spline": Map the bevel factor to the length of a spline.

Reviewers: yakca, sergey, campbellbarton

CC: sanne

Differential Revision: https://developer.blender.org/D294

1 files changed, 10 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_curve_types.h b/source/blender/makesdna/DNA_curve_types.h
index ebba59ec785..0c9e9b01a76 100644
--- a/source/blender/makesdna/DNA_curve_types.h
+++ b/source/blender/makesdna/DNA_curve_types.h
@@ -257,8 +257,10 @@ typedef struct Curve {
 
 	float ctime;			/* current evaltime - for use by Objects parented to curves */
 	float bevfac1, bevfac2;
+	char bevfac1_mapping, bevfac2_mapping;
+
+	char pad2[2];
 
-	char pad2[4];
 } Curve;
 
 /* **************** CURVE ********************* */
@@ -295,6 +297,13 @@ typedef struct Curve {
 #define CU_TWIST_MINIMUM		3
 #define CU_TWIST_TANGENT		4
 
+/* bevel factor mapping */
+enum {
+	CU_BEVFAC_MAP_RESOLU = 0,
+	CU_BEVFAC_MAP_SEGMENT = 1,
+	CU_BEVFAC_MAP_SPLINE = 2
+};
+
 /* spacemode */
 #define CU_LEFT			0
 #define CU_MIDDLE		1