1 files changed, 48 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/armature_shape_outline_vert.glsl b/source/blender/draw/modes/shaders/armature_shape_outline_vert.glsl
new file mode 100644
index 00000000000..3e7a185bb62
--- /dev/null
+++ b/source/blender/draw/modes/shaders/armature_shape_outline_vert.glsl
@@ -0,0 +1,48 @@
+
+uniform mat3 NormalMatrix;
+
+uniform mat4 ViewMatrix;
+uniform mat4 ProjectionMatrix;
+uniform vec2 viewportSize;
+
+/* ---- Instanciated Attribs ---- */
+in vec3 pos;
+in vec3 nor;
+in vec3 snor;
+
+/* ---- Per instance Attribs ---- */
+in mat4 InstanceModelMatrix;
+in vec4 outlineColorSize;
+
+out vec4 pPos;
+out vec3 vPos;
+out vec2 ssPos;
+out vec2 ssNor;
+out vec4 vColSize;
+
+/* project to screen space */
+vec2 proj(vec4 pos)
+{
+	return (0.5 * (pos.xy / pos.w) + 0.5) * viewportSize;
+}
+
+void main()
+{
+	/* This is slow and run per vertex, but it's still faster than
+	 * doing it per instance on CPU and sending it on via instance attrib */
+	mat3 NormalMatrix = transpose(inverse(mat3(ViewMatrix * InstanceModelMatrix)));
+
+	vec4 viewpos = ViewMatrix * (InstanceModelMatrix * vec4(pos, 1.0));
+
+	vPos = viewpos.xyz;
+	pPos = ProjectionMatrix * viewpos;
+
+	/* TODO FIX: there is still a problem with this vector
+	 * when the bone is scaled or in persp mode. But it's
+	 * barelly visible at the outline corners. */
+	ssNor = normalize((NormalMatrix * snor).xy);
+
+	ssPos = proj(pPos);
+
+	vColSize = outlineColorSize;
+}