Pixel-Composer/scripts/node_noise_simplex/node_noise_simplex.gml

function Node_Noise_Simplex(_x, _y, _group = noone) : Node_Processor(_x, _y, _group) constructor {
	name = "Simplex Noise";
	
	shader = sh_simplex;
	uniform_pos = shader_get_uniform(shader, "position");
	uniform_sca = shader_get_uniform(shader, "scale");
	uniform_itr = shader_get_uniform(shader, "iteration");
	
	inputs[| 0] = nodeValue("Dimension", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, def_surf_size2 )
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 1] = nodeValue("Position", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [0, 0, 0] )
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 2] = nodeValue("Scale", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [2, 2] )
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 3] = nodeValue("Iteration", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 1 )
		.setDisplay(VALUE_DISPLAY.slider, [1, 16, 1]);
	
	input_display_list = [
		["Output",	false], 0, 
		["Noise",	false], 1, 2, 3,
	];
	
	outputs[| 0] = nodeValue("Surface out", self, JUNCTION_CONNECT.output, VALUE_TYPE.surface, noone);
	
	attribute_surface_depth();
	
	static process_data = function(_outSurf, _data, _output_index, _array_index) {
		var _dim = _data[0];
		var _pos = _data[1];
		var _sca = _data[2];
		var _itr = _data[3];
		
		_outSurf = surface_verify(_outSurf, _dim[0], _dim[1], attrDepth());
		
		surface_set_target(_outSurf);
		shader_set(shader);
			shader_set_uniform_f_array_safe(uniform_pos, _pos);
			shader_set_uniform_f_array_safe(uniform_sca, _sca);
			shader_set_uniform_i(uniform_itr, _itr);
			
			draw_sprite_ext(s_fx_pixel, 0, 0, 0, _dim[0], _dim[1], 0, c_white, 1);
		shader_reset();
		surface_reset_target();
		
		return _outSurf;
	}
}