Ellipse node for Godot Visual Shader

Ellipse.gd

@tool
class_name VisualShaderNodeEllipse
extends VisualShaderNodeCustom

func _get_name():
	return "Ellipse"

func _get_category():
	return ""

func _get_description():
	return "Draws an ellipse"

func _get_return_icon_type():
	return PORT_TYPE_SCALAR

func _get_input_port_count():
	return 3

func _get_input_port_name(port):
	if(port == 0): return "UV"
	if(port == 1): return "Width"
	return "Height"

func _get_input_port_type(port):
	if(port == 0): return PORT_TYPE_VECTOR_2D
	return PORT_TYPE_SCALAR

func _get_output_port_count():
	return 1

func _get_output_port_name(port):
	return "Out"

func _get_output_port_type(port):
	return PORT_TYPE_SCALAR

func _get_code(input_vars, output_vars,
		mode, type):
	var UV = input_vars[0]
	var Width = input_vars[1]
	var Height = input_vars[2]
	var Out = output_vars[0]
	return "float d = length((%s * 2.0 - 1.0) / vec2(%s, %s));\n" % [UV, Width, Height] \
	+ "%s = clamp((1.0 - d) / fwidth(d), 0.0, 1.0);" % Out