[Bf-blender-cvs] [f418eddf8e1] blender-v2.83-release: GPencil: Fix unreported small offset when use Stroke mode

[Antonio Vazquez]

Commit: f418eddf8e1c924ee45a8dec7b15a0f8bc0d1a8a
Author: Antonio Vazquez
Date:   Sat Apr 25 19:40:12 2020 +0200
Branches: blender-v2.83-release
https://developer.blender.org/rBf418eddf8e1c924ee45a8dec7b15a0f8bc0d1a8a

GPencil: Fix unreported small offset when use Stroke mode

When using the Stroke mode, the reprojection function add a small offset of 0.5 to +X and +Y. Now this effect is removed subtracting this value before doing the conversion.

===================================================================

M	source/blender/editors/gpencil/gpencil_paint.c

===================================================================

diff --git a/source/blender/editors/gpencil/gpencil_paint.c b/source/blender/editors/gpencil/gpencil_paint.c
index e1854ae8c03..bd7dfecf692 100644
--- a/source/blender/editors/gpencil/gpencil_paint.c
+++ b/source/blender/editors/gpencil/gpencil_paint.c
@@ -445,7 +445,10 @@ static void gp_stroke_convertcoords(tGPsdata *p, const float mval[2], float out[
     }
 
     int mval_i[2];
-    round_v2i_v2fl(mval_i, mval);
+    float rmval[2];
+    rmval[0] = mval[0] - 0.5f;
+    rmval[1] = mval[1] - 0.5f;
+    round_v2i_v2fl(mval_i, rmval);
 
     if (gpencil_project_check(p) &&
         (ED_view3d_autodist_simple(p->region, mval_i, out, 0, depth))) {