From c105330a6165d396596510b0fd639ccd9f66eb99 Mon Sep 17 00:00:00 2001
From: Digvijaysinh Gohil <zdigv96@gmail.com>
Date: Fri, 13 Oct 2023 20:41:28 +0530
Subject: [PATCH] Ellipse node added

---
 addons/ShaderLib/Procedural/Shapes/Ellipse.gd | 65 +++++++++++++++++++
 .../Procedural/Shapes/Ellipse.gdshaderinc     |  4 ++
 2 files changed, 69 insertions(+)
 create mode 100644 addons/ShaderLib/Procedural/Shapes/Ellipse.gd
 create mode 100644 addons/ShaderLib/Procedural/Shapes/Ellipse.gdshaderinc

diff --git a/addons/ShaderLib/Procedural/Shapes/Ellipse.gd b/addons/ShaderLib/Procedural/Shapes/Ellipse.gd
new file mode 100644
index 0000000..00a5074
--- /dev/null
+++ b/addons/ShaderLib/Procedural/Shapes/Ellipse.gd
@@ -0,0 +1,65 @@
+@tool
+class_name VisualShaderNodeProceduralEllipse extends VisualShaderNodeCustom
+
+func _init() -> void:
+	_set_input_port_default_value(1, 0.5)
+	_set_input_port_default_value(2, 0.5)
+
+	output_port_for_preview = 0
+
+func _get_name() -> String:
+	return "Ellipse"
+
+func _get_category() -> String:
+	return "Procedural/Shapes"
+
+func _get_description() -> String:
+	return "Generates an ellipse shape based on input UV at the size specified by inputs width and height."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_input_port_count() -> int:
+	return 3
+
+func _get_input_port_name(port: int) -> String:
+	match port:
+		0:
+			return "uv"
+		1:
+			return "width"
+		2:
+			return "height"
+	return ""
+
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	match port:
+		0:
+			return PORT_TYPE_VECTOR_2D
+		1, 2:
+			return PORT_TYPE_SCALAR
+	return PORT_TYPE_SCALAR
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "output"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_SCALAR
+
+func _get_global_code(mode: Shader.Mode) -> String:
+	var code: String = preload("Ellipse.gdshaderinc").code
+	return code
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var uv: String = "UV"
+
+	if input_vars[0]:
+		uv = input_vars[0]
+
+	var width: String = input_vars[1]
+	var height: String = input_vars[2]
+
+	return output_vars[0] + " = ellipse_shape(%s, %s, %s);" % [uv, width, height]
diff --git a/addons/ShaderLib/Procedural/Shapes/Ellipse.gdshaderinc b/addons/ShaderLib/Procedural/Shapes/Ellipse.gdshaderinc
new file mode 100644
index 0000000..d820658
--- /dev/null
+++ b/addons/ShaderLib/Procedural/Shapes/Ellipse.gdshaderinc
@@ -0,0 +1,4 @@
+float ellipse_shape(vec2 uv, float width, float height){
+	float _distance = length((uv * 2.0 - 1.0) / vec2(width, height));
+	return clamp((1.0 - _distance) / fwidth(_distance), 0.0, 1.0);
+}
\ No newline at end of file