Overlay Mode: Use common_view_lib

This is in order to centralize all matrices transformations.

3 files changed, 21 insertions, 10 deletions

diff --git a/source/blender/draw/modes/overlay_mode.c b/source/blender/draw/modes/overlay_mode.c
index fe4bb2db18e..ce49eb0e688 100644
--- a/source/blender/draw/modes/overlay_mode.c
+++ b/source/blender/draw/modes/overlay_mode.c
@@ -100,6 +100,8 @@ extern char datatoc_overlay_face_wireframe_geom_glsl[];
 extern char datatoc_overlay_face_wireframe_frag_glsl[];
 extern char datatoc_gpu_shader_depth_only_frag_glsl[];
 
+extern char datatoc_common_view_lib_glsl[];
+
 /* Functions */
 static void overlay_engine_init(void *vedata)
 {
@@ -133,7 +135,10 @@ static void overlay_engine_init(void *vedata)
 
   if (!sh_data->face_wireframe) {
     sh_data->select_wireframe = GPU_shader_create_from_arrays({
-        .vert = (const char *[]){sh_cfg_data->lib, datatoc_overlay_face_wireframe_vert_glsl, NULL},
+        .vert = (const char *[]){sh_cfg_data->lib,
+                                 datatoc_common_view_lib_glsl,
+                                 datatoc_overlay_face_wireframe_vert_glsl,
+                                 NULL},
         .geom = (const char *[]){sh_cfg_data->lib, datatoc_overlay_face_wireframe_geom_glsl, NULL},
         .frag = (const char *[]){datatoc_gpu_shader_depth_only_frag_glsl, NULL},
         .defs = (const char *[]){sh_cfg_data->def, "#define SELECT_EDGES\n", NULL},
@@ -141,14 +146,20 @@ static void overlay_engine_init(void *vedata)
 #if USE_GEOM_SHADER_WORKAROUND
     /* Apple drivers does not support wide wires. Use geometry shader as a workaround. */
     sh_data->face_wireframe = GPU_shader_create_from_arrays({
-        .vert = (const char *[]){sh_cfg_data->lib, datatoc_overlay_face_wireframe_vert_glsl, NULL},
+        .vert = (const char *[]){sh_cfg_data->lib,
+                                 datatoc_common_view_lib_glsl,
+                                 datatoc_overlay_face_wireframe_vert_glsl,
+                                 NULL},
         .geom = (const char *[]){sh_cfg_data->lib, datatoc_overlay_face_wireframe_geom_glsl, NULL},
         .frag = (const char *[]){datatoc_overlay_face_wireframe_frag_glsl, NULL},
         .defs = (const char *[]){sh_cfg_data->def, "#define USE_GEOM\n", NULL},
     });
 #else
     sh_data->face_wireframe = GPU_shader_create_from_arrays({
-        .vert = (const char *[]){sh_cfg_data->lib, datatoc_overlay_face_wireframe_vert_glsl, NULL},
+        .vert = (const char *[]){sh_cfg_data->lib,
+                                 datatoc_common_view_lib_glsl,
+                                 datatoc_overlay_face_wireframe_vert_glsl,
+                                 NULL},
         .frag = (const char *[]){datatoc_overlay_face_wireframe_frag_glsl, NULL},
         .defs = (const char *[]){sh_cfg_data->def, NULL},
     });
diff --git a/source/blender/draw/modes/shaders/common_view_lib.glsl b/source/blender/draw/modes/shaders/common_view_lib.glsl
index de9c4e2a96e..25aa8e19474 100644
--- a/source/blender/draw/modes/shaders/common_view_lib.glsl
+++ b/source/blender/draw/modes/shaders/common_view_lib.glsl
@@ -13,3 +13,9 @@ layout(std140) uniform viewBlock
 
   vec4 clipPlanes[2];
 };
+
+/* Transform shortcuts. */
+#define transform_normal_object_to_world(nor) (transpose(mat3(ModelMatrixInverse)) * nor)
+#define transform_normal_world_to_object(nor) (transpose(mat3(ModelMatrix)) * nor)
+#define transform_point_view_to_object(point) \
+  ((ModelMatrixInverse * (ViewMatrixInverse * vec4(point, 1.0))).xyz)
diff --git a/source/blender/draw/modes/shaders/overlay_face_wireframe_vert.glsl b/source/blender/draw/modes/shaders/overlay_face_wireframe_vert.glsl
index d73f0bdb609..0d5b4390402 100644
--- a/source/blender/draw/modes/shaders/overlay_face_wireframe_vert.glsl
+++ b/source/blender/draw/modes/shaders/overlay_face_wireframe_vert.glsl
@@ -1,8 +1,4 @@
 
-uniform mat4 ProjectionMatrix;
-uniform mat4 ViewMatrix;
-uniform mat4 ViewMatrixInverse;
-
 uniform mat4 ModelMatrix;
 uniform mat4 ModelMatrixInverse;
 
@@ -22,8 +18,6 @@ float get_edge_sharpness(float wd)
 #endif
 }
 
-#define transform_normal_to_world(nor) (transpose(mat3(ModelMatrixInverse)) * nor)
-
 /* Geometry shader version */
 #if defined(SELECT_EDGES) || defined(USE_GEOM)
 out float facing_g;
@@ -45,7 +39,7 @@ void main()
   vec4 wpos = ModelMatrix * vec4(pos, 1.0);
   gl_Position = projmat * (ViewMatrix * wpos);
 
-  vec3 wnor = normalize(transform_normal_to_world(nor));
+  vec3 wnor = normalize(transform_normal_object_to_world(nor));
   facing_g = dot(wnor, ViewMatrixInverse[2].xyz);
   edgeSharpness_g = get_edge_sharpness(wd);