1 files changed, 30 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/edit_mesh_skin_root_vert.glsl b/source/blender/draw/modes/shaders/edit_mesh_skin_root_vert.glsl
new file mode 100644
index 00000000000..5187571b27b
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_mesh_skin_root_vert.glsl
@@ -0,0 +1,30 @@
+/* Need dedicated obmat since we use instancing attribs
+ * (we cannot let have baseinstance mess them). */
+uniform vec4 editModelMat[4];
+uniform vec3 screen_vecs[2];
+
+/* ---- Instantiated Attrs ---- */
+in vec2 pos;
+
+/* ---- Per instance Attrs ---- */
+in float size;
+in vec3 local_pos;
+
+flat out vec4 finalColor;
+
+void main()
+{
+  mat4 obmat = mat4(editModelMat[0], editModelMat[1], editModelMat[2], editModelMat[3]);
+  /* Could be optimized... but it is only for a handful of verts so not a priority. */
+  mat3 imat = inverse(mat3(obmat));
+  vec3 right = normalize(imat * vec3(screen_vecs[0]));
+  vec3 up = normalize(imat * vec3(screen_vecs[1]));
+  vec3 screen_pos = (right * pos.x + up * pos.y) * size;
+  vec4 pos_4d = obmat * vec4(local_pos + screen_pos, 1.0);
+  gl_Position = ViewProjectionMatrix * pos_4d;
+  finalColor = colorSkinRoot;
+
+#ifdef USE_WORLD_CLIP_PLANES
+  world_clip_planes_calc_clip_distance(pos_4d.xyz);
+#endif
+}