Curves: Add custom profile bevel support

This adds support for the same custom bevel profile widget used in
the bevel tool and modifier to the geometry generation for curves.

This is expecially useful for text and 2D curves with extrusion, as
it works much better than a weld & bevel modifier combination.
It can also be useful for adding quick detail to pipe-like objects.

The curve holds the CurveProfile struct and a new "Bevel Mode"
property decides which type of bevel to build, round, object, or
custom profile.

Although curves can already use another curve to make the bevel
geometry, this is a quicker way, and it also defines the profile of
just one corner of the bevel, so it isn't redundant. It's also nice
to have the same custom profile functionality wherever there is bevel.

Differential Revision: https://developer.blender.org/D8402

1 files changed, 12 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_curve_types.h b/source/blender/makesdna/DNA_curve_types.h
index 8d5b5602c2e..2f362034b78 100644
--- a/source/blender/makesdna/DNA_curve_types.h
+++ b/source/blender/makesdna/DNA_curve_types.h
@@ -31,6 +31,7 @@
 #define MAXTEXTBOX 256 /* used in readfile.c and editfont.c */
 
 struct AnimData;
+struct CurveProfile;
 struct EditFont;
 struct GHash;
 struct Ipo;
@@ -232,6 +233,8 @@ typedef struct Curve {
   struct Key *key;
   struct Material **mat;
 
+  struct CurveProfile *bevel_profile;
+
   /* texture space, copied as one block in editobject.c */
   float loc[3];
   float size[3];
@@ -261,7 +264,8 @@ typedef struct Curve {
 
   char overflow;
   char spacemode, align_y;
-  char _pad[3];
+  char bevel_mode;
+  char _pad[2];
 
   /* font part */
   short lines;
@@ -385,6 +389,13 @@ enum {
   CU_ALIGN_Y_BOTTOM = 4,
 };
 
+/* Curve.bevel_mode */
+enum {
+  CU_BEV_MODE_ROUND = 0,
+  CU_BEV_MODE_OBJECT = 1,
+  CU_BEV_MODE_CURVE_PROFILE = 2,
+};
+
 /* Curve.overflow. */
 enum {
   CU_OVERFLOW_NONE = 0,