Transform Snap: initial snap context refactor

This introduces a snap-context that can be re-used for casting rays into the scene
(by operators such as walk-mode, ruler and transform code).

This can be used to cache data between calls too.

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/transform/transform.h b/source/blender/editors/transform/transform.h
index c156e9ecec0..5858210cd4f 100644
--- a/source/blender/editors/transform/transform.h
+++ b/source/blender/editors/transform/transform.h
@@ -101,6 +101,11 @@ typedef struct TransSnap {
 	 * where the smallest absolute value defines whats closest.
 	 */
 	float  (*distance)(struct TransInfo *, const float p1[3], const float p2[3]);
+
+	/**
+	 * Re-usable snap context data.
+	 */
+	SnapObjectContext *object_context;
 } TransSnap;
 
 typedef struct TransCon {
@@ -677,6 +682,7 @@ bool activeSnap(TransInfo *t);
 bool validSnap(TransInfo *t);
 
 void initSnapping(struct TransInfo *t, struct wmOperator *op);
+void freeSnapping(struct TransInfo *t);
 void applyProject(TransInfo *t);
 void applyGridAbsolute(TransInfo *t);
 void applySnapping(TransInfo *t, float *vec);
@@ -786,4 +792,8 @@ void projectVertSlideData(TransInfo *t, bool is_final);
 /* TODO. transform_queries.c */
 bool checkUseAxisMatrix(TransInfo *t);
 
+#define TRANSFORM_DIST_MAX_PX 1000.0f
+#define TRANSFORM_SNAP_MAX_PX 100.0f
+#define TRANSFORM_DIST_INVALID -FLT_MAX
+
 #endif