GPU: add 2D projection function

When projecting into screen space Z value isn't always needed.
Add 2D projection functions, renaming them to avoid accidents
happening again.

- Add GPU_matrix_project_2fv
- Add ED_view3d_project_v2
- Rename ED_view3d_project to ED_view3d_project_v3
- Use the 2D versions of these functions when the Z value isn't used.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/space_view3d/view3d_gizmo_preselect_type.c b/source/blender/editors/space_view3d/view3d_gizmo_preselect_type.c
index 298a2a7a824..07c3b6bd1d8 100644
--- a/source/blender/editors/space_view3d/view3d_gizmo_preselect_type.c
+++ b/source/blender/editors/space_view3d/view3d_gizmo_preselect_type.c
@@ -154,10 +154,10 @@ static int gizmo_preselect_elem_test_select(bContext *C, wmGizmo *gz, const int
        * Only pre-select a vertex when the cursor is really close to it. */
       if (eve_test) {
         BMVert *vert = (BMVert *)eve_test;
-        float vert_p_co[3], vert_co[3];
+        float vert_p_co[2], vert_co[3];
         const float mval_f[2] = {UNPACK2(vc.mval)};
         mul_v3_m4v3(vert_co, gz_ele->bases[base_index_vert]->object->obmat, vert->co);
-        ED_view3d_project(vc.region, vert_co, vert_p_co);
+        ED_view3d_project_v2(vc.region, vert_co, vert_p_co);
         float len = len_v2v2(vert_p_co, mval_f);
         if (len < 35) {
           best.ele = (BMElem *)eve_test;