fix [#30848] Edge Selection fails when the following Conditions met:

summery: when both verts are outside the viewport

this is in fact a very old annoyance but good to resolve.
fix by doing segment/rectangle intersection between the edge and the viewport so it works when the both verts are outside the view.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_rect.h b/source/blender/blenlib/BLI_rect.h
index d1209524c15..7ce19ce8583 100644
--- a/source/blender/blenlib/BLI_rect.h
+++ b/source/blender/blenlib/BLI_rect.h
@@ -58,6 +58,8 @@ void BLI_resize_rcti(struct rcti *rect, int x, int y);
 void BLI_resize_rctf(struct rctf *rect, float x, float y);
 int  BLI_in_rcti(struct rcti *rect, int x, int y);
 int  BLI_in_rctf(struct rctf *rect, float x, float y);
+int  BLI_segment_in_rcti(struct rcti *rect, int s1[2], int s2[2]);
+// int  BLI_segment_in_rctf(struct rcti *rect, int s1[2], int s2[2]); // NOT NEEDED YET
 int  BLI_isect_rctf(struct rctf *src1, struct rctf *src2, struct rctf *dest);
 int  BLI_isect_rcti(struct rcti *src1, struct rcti *src2, struct rcti *dest);
 void BLI_union_rctf(struct rctf *rcta, struct rctf *rctb);