Hook Modifier: add falloff & radius options

- Add falloff types & curves (matching warp-modifier)
- Add uniform scale option,
  important when adding hooks to non-uniform scaled objects,
  especially for use with lattice objects which can't avoid uneven scaling.

  This uses relative transformation set when the hook is assigned,
  when measuring the distances.

1 files changed, 23 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_modifier_types.h b/source/blender/makesdna/DNA_modifier_types.h
index 2d8c3b23da7..47273d3c713 100644
--- a/source/blender/makesdna/DNA_modifier_types.h
+++ b/source/blender/makesdna/DNA_modifier_types.h
@@ -535,16 +535,39 @@ typedef struct ArmatureModifierData {
 	char defgrp_name[64];     /* MAX_VGROUP_NAME */
 } ArmatureModifierData;
 
+enum {
+	MOD_HOOK_UNIFORM_SPACE = (1 << 0),
+};
+
+/* same as WarpModifierFalloff */
+typedef enum {
+	eHook_Falloff_None   = 0,
+	eHook_Falloff_Curve  = 1,
+	eHook_Falloff_Sharp  = 2, /* PROP_SHARP */
+	eHook_Falloff_Smooth = 3, /* PROP_SMOOTH */
+	eHook_Falloff_Root   = 4, /* PROP_ROOT */
+	eHook_Falloff_Linear = 5, /* PROP_LIN */
+	eHook_Falloff_Const  = 6, /* PROP_CONST */
+	eHook_Falloff_Sphere = 7, /* PROP_SPHERE */
+	eHook_Falloff_InvSquare = 8, /* PROP_INVSQUARE */
+	/* PROP_RANDOM not used */
+} HookModifierFalloff;
+
 typedef struct HookModifierData {
 	ModifierData modifier;
 
 	struct Object *object;
 	char subtarget[64];     /* optional name of bone target, MAX_ID_NAME-2 */
 
+	char flag;
+	char falloff_type;      /* use enums from WarpModifier (exact same functionality) */
+	char pad[6];
 	float parentinv[4][4];  /* matrix making current transform unmodified */
 	float cent[3];          /* visualization of hook */
 	float falloff;          /* if not zero, falloff is distance where influence zero */
 
+	struct CurveMapping *curfalloff;
+
 	int *indexar;           /* if NULL, it's using vertexgroup */
 	int totindex;
 	float force;