1 files changed, 38 insertions, 0 deletions
diff --git a/source/blender/draw/modes/shaders/animviz_mpath_lines_geom.glsl b/source/blender/draw/modes/shaders/animviz_mpath_lines_geom.glsl
new file mode 100644
index 00000000000..d9d59880e99
--- /dev/null
+++ b/source/blender/draw/modes/shaders/animviz_mpath_lines_geom.glsl
@@ -0,0 +1,38 @@
+
+layout(lines) in;
+layout(triangle_strip, max_vertices = 4) out;
+
+uniform mat4 ProjectionMatrix;
+uniform vec2 viewportSize;
+uniform int lineThickness = 2;
+
+in vec4 finalColor_geom[];
+in vec2 ssPos[];
+
+out vec4 finalColor;
+
+vec2 compute_dir(vec2 v0, vec2 v1)
+{
+	vec2 dir = normalize(v1 - v0 + 1e-8);
+	dir = vec2(-dir.y, dir.x);
+	return dir;
+}
+
+void main(void)
+{
+	vec2 t;
+	vec2 edge_dir = compute_dir(ssPos[0], ssPos[1]) / viewportSize;
+
+	bool is_persp = (ProjectionMatrix[3][3] == 0.0);
+
+	finalColor = finalColor_geom[0];
+	t = edge_dir * (float(lineThickness) * (is_persp ? gl_in[0].gl_Position.w : 1.0));
+	gl_Position = gl_in[0].gl_Position + vec4(t, 0.0, 0.0); EmitVertex();
+	gl_Position = gl_in[0].gl_Position - vec4(t, 0.0, 0.0); EmitVertex();
+
+	finalColor = finalColor_geom[1];
+	t = edge_dir * (float(lineThickness) * (is_persp ? gl_in[1].gl_Position.w : 1.0));
+	gl_Position = gl_in[1].gl_Position + vec4(t, 0.0, 0.0); EmitVertex();
+	gl_Position = gl_in[1].gl_Position - vec4(t, 0.0, 0.0); EmitVertex();
+	EndPrimitive();
+}