Cycles: Improved robustness of hair motion blur.motion_curve_fix

In some instances, the number of control vertices of a hair could change mid-frame.
Cycles would then be unable to calculate proper motion blur for those hairs. This adds
interpolated CVs to fill in for the missing data. While this will not necessarily result in
a fully accurate reconstruction of the guide hair, it preserves motion blur instead of disabling it.

Reviewers: #cycles, sergey

Reviewed By: #cycles, sergey

Subscribers: sergey, brecht, #cycles

Tags: #cycles

Differential Revision: https://developer.blender.org/D3695

1 files changed, 17 insertions, 17 deletions

diff --git a/source/blender/makesdna/DNA_constraint_types.h b/source/blender/makesdna/DNA_constraint_types.h
index 2ae686d178e..e49cd65fa9b 100644
--- a/source/blender/makesdna/DNA_constraint_types.h
+++ b/source/blender/makesdna/DNA_constraint_types.h
@@ -54,19 +54,19 @@ typedef struct bConstraintChannel {
 typedef struct bConstraint {
 	struct bConstraint *next, *prev;
 
-	void		*data;		/*	Constraint data	(a valid constraint type) */
-	short		type;		/*	Constraint type	*/
-	short		flag;		/*	Flag - General Settings	*/
+	void		*data;		/* Constraint data	(a valid constraint type) */
+	short		type;		/* Constraint type	*/
+	short		flag;		/* Flag - General Settings	*/
 
-	char 		ownspace;	/* 	Space that owner should be evaluated in 	*/
-	char		tarspace;	/* 	Space that target should be evaluated in (only used if 1 target) */
+	char 		ownspace;	/* Space that owner should be evaluated in 	*/
+	char		tarspace;	/* Space that target should be evaluated in (only used if 1 target) */
 
-	char		name[64];	/*	Constraint name, MAX_NAME */
+	char		name[64];	/* Constraint name, MAX_NAME */
 
 	short		pad;
 
 	float		enforce;	/* 	Amount of influence exherted by constraint (0.0-1.0) */
-	float		headtail;	/*	Point along subtarget bone where the actual target is. 0=head (default for all), 1=tail*/
+	float		headtail;	/* Point along subtarget bone where the actual target is. 0=head (default for all), 1=tail*/
 
 	struct Ipo *ipo    DNA_DEPRECATED;		/* local influence ipo or driver */  /* old animation system, deprecated for 2.5 */
 
@@ -103,10 +103,10 @@ typedef enum eConstraintTargetFlag {
 
 /* bConstraintTarget/bConstraintOb -> type */
 typedef enum eConstraintObType {
-	CONSTRAINT_OBTYPE_OBJECT = 1,	/*	string is ""				*/
-	CONSTRAINT_OBTYPE_BONE   = 2,	/*	string is bone-name		*/
-	CONSTRAINT_OBTYPE_VERT   = 3,	/*	string is vertex-group name 	*/
-	CONSTRAINT_OBTYPE_CV     = 4	/*	string is vertex-group name - is not available until curves get vgroups */
+	CONSTRAINT_OBTYPE_OBJECT = 1,	/* string is "" */
+	CONSTRAINT_OBTYPE_BONE   = 2,	/* string is bone-name */
+	CONSTRAINT_OBTYPE_VERT   = 3,	/* string is vertex-group name */
+	CONSTRAINT_OBTYPE_CV     = 4	/* string is vertex-group name - is not available until curves get vgroups */
 } eConstraintObType;
 
 
@@ -121,7 +121,7 @@ typedef struct bPythonConstraint {
 	ListBase targets;		/* a list of targets that this constraint has (bConstraintTarget-s) */
 
 	struct Object *tar;		/* target from previous implementation (version-patch sets this to NULL on file-load) */
-	char subtarget[64];		/* subtarger from previous implentation (version-patch sets this to "" on file-load), MAX_ID_NAME-2 */
+	char subtarget[64];		/* subtarger from previous implementation (version-patch sets this to "" on file-load), MAX_ID_NAME-2 */
 } bPythonConstraint;
 
 
@@ -364,14 +364,14 @@ typedef struct bTransformConstraint {
 /* Pivot Constraint */
 typedef struct bPivotConstraint {
 	/* Pivot Point:
-	 *	Either target object + offset, or just offset is used
+	 * Either target object + offset, or just offset is used
 	 */
 	struct Object 		*tar;			/* target object (optional) */
 	char		subtarget[64];		/* subtarget name (optional), MAX_ID_NAME-2 */
 	float 		offset[3];		/* offset from the target to use, regardless of whether it exists */
 
 	/* Rotation-driven activation:
-	 *	This option provides easier one-stop setups for footrolls
+	 * This option provides easier one-stop setups for footrolls
 	 */
 	short 		rotAxis;		/* rotation axes to consider for this (ePivotConstraint_Axis) */
 
@@ -467,8 +467,8 @@ typedef struct bTransformCacheConstraint {
 /* ------------------------------------------ */
 
 /* bConstraint->type
- * 	- Do not ever change the order of these, or else files could get
- * 	  broken as their correct value cannot be resolved
+ * - Do not ever change the order of these, or else files could get
+ *   broken as their correct value cannot be resolved
  */
 typedef enum eBConstraint_Types {
 	CONSTRAINT_TYPE_NULL = 0,			/* Invalid/legacy constraint */
@@ -641,7 +641,7 @@ typedef enum eTrackTo_Flags {
 	TARGET_Z_UP 	= (1<<0)
 } eTrackTo_Flags;
 
-/* Strech To Constraint -> volmode */
+/* Stretch To Constraint -> volmode */
 typedef enum eStretchTo_VolMode {
 	VOLUME_XZ	= 0,
 	VOLUME_X	= 1,