POC

resources/shaders/140/texture_displacement_bump.vs

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+#version 140
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+uniform mat4 volume_world_matrix;
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
+in vec3  v_position;
+// Per-vertex paint weight for the currently active texture-displacement layer, 0..1 (see
+// TriangleSelectorWeighted... note: Phase 1 stores this as a plain enforced/not-enforced mask,
+// so this is 0.0 or 1.0 today; a continuous value is a natural later-phase extension).
+in float v_weight;
+
+out vec3  clipping_planes_dots;
+out vec4  model_pos;
+out vec4  world_pos;
+out float weight;
+
+void main()
+{
+    model_pos = vec4(v_position, 1.0);
+    world_pos = volume_world_matrix * model_pos;
+
+    gl_Position = projection_matrix * view_model_matrix * model_pos;
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+
+    weight = v_weight;
+}