1 files changed, 30 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_vector_displacement.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_vector_displacement.glsl
new file mode 100644
index 00000000000..b6b955dcdb4
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_vector_displacement.glsl
@@ -0,0 +1,30 @@
+void node_vector_displacement_tangent(vec4 vector,
+                                      float midlevel,
+                                      float scale,
+                                      vec4 tangent,
+                                      vec3 normal,
+                                      mat4 obmat,
+                                      mat4 viewmat,
+                                      out vec3 result)
+{
+  /* TODO(fclem) this is broken. revisit latter. */
+  vec3 N_object = normalize(((vec4(normal, 0.0) * viewmat) * obmat).xyz);
+  vec3 T_object = normalize(((vec4(tangent.xyz, 0.0) * viewmat) * obmat).xyz);
+  vec3 B_object = tangent.w * normalize(cross(N_object, T_object));
+
+  vec3 offset = (vector.xyz - vec3(midlevel)) * scale;
+  result = offset.x * T_object + offset.y * N_object + offset.z * B_object;
+  result = (obmat * vec4(result, 0.0)).xyz;
+}
+
+void node_vector_displacement_object(
+    vec4 vector, float midlevel, float scale, mat4 obmat, out vec3 result)
+{
+  result = (vector.xyz - vec3(midlevel)) * scale;
+  result = (obmat * vec4(result, 0.0)).xyz;
+}
+
+void node_vector_displacement_world(vec4 vector, float midlevel, float scale, out vec3 result)
+{
+  result = (vector.xyz - vec3(midlevel)) * scale;
+}