Various wave nodes added

Nodes includes NoiseSineWave, SawtoothWave, SquareWave, TriangleWave

addons/ShaderLib/Maths/Wave/NoiseSineWave.gd

@@ -0,0 +1,56 @@
+@tool
+class_name VisualShaderNodeMathsNoiseSineWave extends VisualShaderNodeCustom
+
+func _init() -> void:
+	set_input_port_default_value(1, Vector2(0.0, 1.0))
+
+func _get_name() -> String:
+	return "NoiseSineWave"
+
+func _get_category() -> String:
+	return "Maths/Wave"
+
+func _get_description() -> String:
+	return "Returns the sine of the value of input in. For variance, psuedo-random noise is added to the amplitude of the sine wave, within a range determined by input min max."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_input_port_count() -> int:
+	return 2
+
+func _get_input_port_name(port: int) -> String:
+	match port:
+		0:
+			return "in"
+		1, _:
+			return "min max"
+
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	match port:
+		0:
+			return PORT_TYPE_VECTOR_4D
+		1:
+			return PORT_TYPE_VECTOR_2D
+	return PORT_TYPE_SCALAR
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "out"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_global_code(mode: Shader.Mode) -> String:
+	var code: String = preload("NoiseSineWave.gdshaderinc").code
+	return code
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var input: String = "vec4(0.0)"
+	if input_vars[0]:
+		input = input_vars[0]
+
+	var min_max: String = input_vars[1]
+	return output_vars[0] + " = noise_sine_wave(%s, %s);" % [input, min_max]

addons/ShaderLib/Maths/Wave/NoiseSineWave.gdshaderinc

@@ -0,0 +1,8 @@
+vec4 noise_sine_wave(vec4 input, vec2 min_max)
+{
+    vec4 _sin_in = sin(input);
+    vec4 _sin_in_offset = sin(input + 1.0);
+    vec4 _random_number =  fract(sin((_sin_in - _sin_in_offset) * (12.9898 + 78.233))*43758.5453);
+    float _noise = mix(min_max.x, min_max.y, _random_number.x);
+    return _sin_in + vec4(_noise);
+}

addons/ShaderLib/Maths/Wave/SawtoothWave.gd

@@ -0,0 +1,38 @@
+@tool
+class_name VisualShaderNodeMathsSawtoothWave extends VisualShaderNodeCustom
+
+func _get_name() -> String:
+	return "SawtoothWave"
+
+func _get_category() -> String:
+	return "Maths/Wave"
+
+func _get_description() -> String:
+	return "Returns a sawtooth wave from the value of input in. Resulting output values will be between -1 and 1."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_input_port_count() -> int:
+	return 1
+
+func _get_input_port_name(port: int) -> String:
+	return "in"
+
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "out"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var input: String = "vec4(0.0)"
+	if input_vars[0]:
+		input = input_vars[0]
+	return output_vars[0] + " = 2.0 * (%s - floor(0.5 + %s));" % [input, input]

addons/ShaderLib/Maths/Wave/SquareWave.gd

@@ -0,0 +1,39 @@
+@tool
+class_name VisualShaderNodeMathsSquareWave extends VisualShaderNodeCustom
+
+
+func _get_name() -> String:
+	return "SquareWave"
+
+func _get_category() -> String:
+	return "Maths/Wave"
+
+func _get_description() -> String:
+	return "Returns a square wave from the value of input in. Resulting output values will be between -1 and 1."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_input_port_count() -> int:
+	return 1
+
+func _get_input_port_name(port: int) -> String:
+	return "input"
+
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "out"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var input: String = "vec4(0.0)"
+	if input_vars[0]:
+		input = input_vars[0]
+	return output_vars[0] + " = 1.0 - 2.0 * round(fract(%s));" % [input]

addons/ShaderLib/Maths/Wave/TriangleWave.gd

@@ -0,0 +1,37 @@
+@tool
+class_name VisualShaderNodeMathsTriangleWave extends VisualShaderNodeCustom
+
+func _get_name() -> String:
+	return "TriangleWave"
+
+func _get_category() -> String:
+	return "Maths/Wave"
+
+func _get_description() -> String:
+	return "Returns a triangle wave from the value of input in. Resulting output values will be between -1 and 1."
+
+func _get_return_icon_type() -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_input_port_count() -> int:
+	return 1
+
+func _get_input_port_name(port: int) -> String:
+	return "in"
+func _get_input_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_output_port_count() -> int:
+	return 1
+
+func _get_output_port_name(port: int) -> String:
+	return "out"
+
+func _get_output_port_type(port: int) -> VisualShaderNode.PortType:
+	return PORT_TYPE_VECTOR_4D
+
+func _get_code(input_vars: Array[String], output_vars: Array[String], mode: Shader.Mode, type: VisualShader.Type) -> String:
+	var input: String = "vec4(0.0)"
+	if input_vars[0]:
+		input = input_vars[0]
+	return output_vars[0] + " = 2.0 * abs(2.0 * (%s - floor(0.5 + %s))) - 1.0;" % [input, input]