1 files changed, 29 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_immediate_util.c b/source/blender/gpu/intern/gpu_immediate_util.c
index df18b89bd67..2dd23fa46ae 100644
--- a/source/blender/gpu/intern/gpu_immediate_util.c
+++ b/source/blender/gpu/intern/gpu_immediate_util.c
@@ -654,3 +654,32 @@ void imm_drawcircball(const float cent[3], float rad, const float tmat[4][4], ui
   }
   immEnd();
 }
+
+void imm_drawX(const float cent[3], float size, const float tmat[4][4], uint pos)
+{
+  /* Draw an "X" indicating where the previous snap point is.
+   * This is useful for indicating perpendicular snap. */
+
+  /* v1, v2, v3 and v4 indicate the coordinates of the ends of the "X". */
+  float vx[3], vy[3], v1[3], v2[3], v3[3], v4[4];
+
+  mul_v3_v3fl(vx, tmat[0], size);
+  mul_v3_v3fl(vy, tmat[1], size);
+
+  add_v3_v3v3(v1, vx, vy);
+  sub_v3_v3v3(v2, vx, vy);
+  negate_v3_v3(v3, v1);
+  negate_v3_v3(v4, v2);
+
+  add_v3_v3(v1, cent);
+  add_v3_v3(v2, cent);
+  add_v3_v3(v3, cent);
+  add_v3_v3(v4, cent);
+
+  immBegin(GPU_PRIM_LINES, 4);
+  immVertex3fv(pos, v3);
+  immVertex3fv(pos, v1);
+  immVertex3fv(pos, v4);
+  immVertex3fv(pos, v2);
+  immEnd();
+}