Curve Batch Cache: Rework Implementation to use new batch request

Shaded triangles are not yet implemented (request from gpumaterials).

This also changes the mechanism to draw curve normals to make it not
dependant on normal size display. This way different viewport can
reuse the same batch.

1 files changed, 23 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/edit_curve_overlay_normals_vert.glsl b/source/blender/draw/modes/shaders/edit_curve_overlay_normals_vert.glsl
new file mode 100644
index 00000000000..06be402d737
--- /dev/null
+++ b/source/blender/draw/modes/shaders/edit_curve_overlay_normals_vert.glsl
@@ -0,0 +1,23 @@
+
+/* Draw Curve Normals */
+
+uniform mat4 ModelViewProjectionMatrix;
+uniform float normalSize;
+
+in vec3 pos;
+in vec3 nor;
+in vec3 tan;
+in float rad;
+
+void main()
+{
+	vec3 final_pos = pos;
+
+	float flip = (gl_InstanceID != 0) ? -1.0 : 1.0;
+
+	if (gl_VertexID % 2 == 0) {
+		final_pos += normalSize * rad * (flip * nor - tan);
+	}
+
+	gl_Position = ModelViewProjectionMatrix * vec4(final_pos, 1.0);
+}