Workbench: Use common_view_lib.glsl

This removes ModelViewProjectionMatrix usage

2 files changed, 23 insertions, 17 deletions

diff --git a/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl b/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
index bb4c4fe4177..2955bcb9cca 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
@@ -1,8 +1,6 @@
 uniform mat4 ModelMatrix;
 uniform mat4 ModelMatrixInverse;
 
-uniform mat4 ModelViewProjectionMatrix;
-
 #ifndef HAIR_SHADER
 in vec3 pos;
 in vec3 nor;
@@ -47,6 +45,18 @@ vec3 srgb_to_linear_attr(vec3 c)
 }
 #endif
 
+vec3 workbench_hair_hair_normal(vec3 tan, vec3 binor, float rand)
+{
+  /* To "simulate" anisotropic shading, randomize hair normal per strand. */
+  tan = normalize(tan);
+  vec3 nor = normalize(cross(binor, tan));
+  // nor = normalize(mix(nor, -tan, rand * 0.1));
+  // float cos_theta = (rand * 2.0 - 1.0) * 0.2;
+  // float sin_theta = sqrt(max(0.0, 1.0 - cos_theta * cos_theta));
+  // nor = nor * sin_theta + binor * cos_theta;
+  return nor;
+}
+
 void main()
 {
 #ifdef HAIR_SHADER
@@ -54,29 +64,25 @@ void main()
   vec2 uv = hair_get_customdata_vec2(u);
 #  endif
   float time, thick_time, thickness;
-  vec3 pos, tan, binor;
+  vec3 world_pos, tan, binor;
   hair_get_pos_tan_binor_time((ProjectionMatrix[3][3] == 0.0),
                               ModelMatrixInverse,
                               ViewMatrixInverse[3].xyz,
                               ViewMatrixInverse[2].xyz,
-                              pos,
+                              world_pos,
                               tan,
                               binor,
                               time,
                               thickness,
                               thick_time);
-  /* To "simulate" anisotropic shading, randomize hair normal per strand. */
+
   hair_rand = integer_noise(hair_get_strand_id());
-  tan = normalize(tan);
-  vec3 nor = normalize(cross(binor, tan));
-  nor = normalize(mix(nor, -tan, hair_rand * 0.10));
-  float cos_theta = (hair_rand * 2.0 - 1.0) * 0.20;
-  float sin_theta = sqrt(max(0.0, 1.0f - cos_theta * cos_theta));
-  nor = nor * sin_theta + binor * cos_theta;
-  gl_Position = ViewProjectionMatrix * vec4(pos, 1.0);
+  vec3 nor = workbench_hair_hair_normal(tan, binor, hair_rand);
 #else
-  gl_Position = ModelViewProjectionMatrix * vec4(pos, 1.0);
+  vec3 world_pos = point_object_to_world(pos);
 #endif
+  gl_Position = point_world_to_ndc(world_pos);
+
 #ifdef V3D_SHADING_TEXTURE_COLOR
   uv_interp = uv;
 #endif
@@ -95,6 +101,6 @@ void main()
 #endif
 
 #ifdef USE_WORLD_CLIP_PLANES
-  world_clip_planes_calc_clip_distance((ModelMatrix * vec4(pos, 1.0)).xyz);
+  world_clip_planes_calc_clip_distance(world_pos);
 #endif
 }
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_shadow_vert.glsl b/source/blender/draw/engines/workbench/shaders/workbench_shadow_vert.glsl
index afd704a7d3a..85145a2dcdc 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_shadow_vert.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_shadow_vert.glsl
@@ -1,6 +1,6 @@
 #define INFINITE 1000.0
 
-uniform mat4 ModelViewProjectionMatrix;
+uniform mat4 ModelMatrix;
 
 uniform vec3 lightDirection = vec3(0.57, 0.57, -0.57);
 uniform float lightDistance = 1e4;
@@ -18,6 +18,6 @@ vData;
 void main()
 {
   vData.pos = pos;
-  vData.frontPosition = ModelViewProjectionMatrix * vec4(pos, 1.0);
-  vData.backPosition = ModelViewProjectionMatrix * vec4(pos + lightDirection * lightDistance, 1.0);
+  vData.frontPosition = point_object_to_ndc(pos);
+  vData.backPosition = point_object_to_ndc(pos + lightDirection * lightDistance);
 }