Pixel-Composer/scripts/node_line/node_line.gml

function Node_Line(_x, _y, _group = noone) : Node_Processor(_x, _y, _group) constructor {	
	name = "Line";
	
	inputs[| 0] = nodeValue("Dimension", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, DEF_SURF )
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 1] = nodeValue("Background", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false);
	
	inputs[| 2] = nodeValue("Segment", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 1)
		.setDisplay(VALUE_DISPLAY.slider, { range: [1, 32, 1] });
	
	inputs[| 3] = nodeValue("Width", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [ 2, 2 ])
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 4] = nodeValue("Wiggle", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 0)
		.setDisplay(VALUE_DISPLAY.slider, { range: [0, 16, 0.01] });
	
	inputs[| 5] = nodeValue("Random seed", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 0);
	
	inputs[| 6] = nodeValue("Rotation", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 0)
		.setDisplay(VALUE_DISPLAY.rotation);
	
	inputs[| 7] = nodeValue("Path", self, JUNCTION_CONNECT.input, VALUE_TYPE.pathnode, noone, "Draw line along path.")
		.setVisible(true, true)
		.setArrayDepth(1);
	
	inputs[| 8] = nodeValue("Range", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [0, 1], "Range of the path to draw.")
		.setDisplay(VALUE_DISPLAY.slider_range);
	
	inputs[| 9] = nodeValue("Shift", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 0)
		.setDisplay(VALUE_DISPLAY._default, { slide_speed: 1 / 64 });
	
	inputs[| 10] = nodeValue("Color over length", self, JUNCTION_CONNECT.input, VALUE_TYPE.gradient, new gradientObject(c_white) );
	
	inputs[| 11] = nodeValue("Width over length", self, JUNCTION_CONNECT.input, VALUE_TYPE.curve, CURVE_DEF_11);
	
	inputs[| 12] = nodeValue("Span width over path", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false, "Apply the full 'width over length' to the trimmed path.");
		
	inputs[| 13] = nodeValue("Round cap", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false);
	
	inputs[| 14] = nodeValue("Round segment", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 4)
		.setDisplay(VALUE_DISPLAY.slider, { range: [2, 16, 1] });
	
	inputs[| 15] = nodeValue("Span color over path", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false, "Apply the full 'color over length' to the trimmed path.");
	
	inputs[| 16] = nodeValue("Greyscale over width", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false);
	
	inputs[| 17] = nodeValue("1px mode", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false, "Render pixel perfect 1px line.");
	
	inputs[| 18] = nodeValue("Texture", self, JUNCTION_CONNECT.input, VALUE_TYPE.surface, noone);
	
	inputs[| 19] = nodeValue("Fix length", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false, "Fix length of each segment instead of segment count.");
	
	inputs[| 20] = nodeValue("Segment length", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 4);
	
	inputs[| 21] = nodeValue("Texture position", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [ 0, 0 ])
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 22] = nodeValue("Texture rotation", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 0)
		.setDisplay(VALUE_DISPLAY.rotation);
	
	inputs[| 23] = nodeValue("Texture scale", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, [ 1, 1 ])
		.setDisplay(VALUE_DISPLAY.vector);
	
	inputs[| 24] = nodeValue("Random Blend", self, JUNCTION_CONNECT.input, VALUE_TYPE.gradient, new gradientObject(c_white) );
	
	inputs[| 25] = nodeValue("Invert", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false );
	
	inputs[| 26] = nodeValue("Clamp range", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, false );
	
	input_display_list = [
		["Output",			true],	0, 1, 
		["Line data",		false], 6, 7, 19, 2, 20, 
		["Line settings",	false], 17, 3, 11, 12, 8, 25, 9, 26, 13, 14, 
		["Wiggle",			false], 4, 5, 
		["Render",			false], 10, 24, 15, 16, 
		["Texture",			false], 18, 21, 22, 23, 
	];
	
	outputs[| 0] = nodeValue("Surface out", self, JUNCTION_CONNECT.output, VALUE_TYPE.surface, noone);
	
	lines = [];
	
	widthMap = ds_map_create();
	
	attribute_surface_depth();
	attribute_interpolation();
	
	static drawOverlay = function(active, _x, _y, _s, _mx, _my, _snx, _sny) { #region
		draw_set_color(COLORS._main_accent);
		for( var i = 0, n = array_length(lines); i < n; i++ ) {
			var points = lines[i];
			if(array_length(points) < 2) continue;
				
			for( var j = 1; j < array_length(points); j++ ) {
				var x0 = points[j - 1].x;
				var y0 = points[j - 1].y;
				var x1 = points[j].x;
				var y1 = points[j].y;
				
				x0 = _x + x0 * _s;
				y0 = _y + y0 * _s;
				x1 = _x + x1 * _s;
				y1 = _y + y1 * _s;
				
				draw_line(x0, y0, x1, y1);
			}
		}
	} #endregion
	
	static step = function() { #region
		var px    = !getInputData(17);
		var _tex  = inputs[| 18].value_from != noone;
		var _flen = getInputData(19);
		
		inputs[|  3].setVisible(px);
		inputs[| 11].setVisible(px);
		inputs[| 12].setVisible(px);
		inputs[| 13].setVisible(px && !_tex);
		inputs[| 14].setVisible(px);
		inputs[| 18].setVisible(px);
		
		inputs[| 15].setVisible(!_tex);
		inputs[| 16].setVisible(!_tex);
		
		inputs[|  2].setVisible(!_flen);
		inputs[| 20].setVisible( _flen);
	} #endregion
	
	static onValueUpdate = function(index = 0) { #region
		if(index == 11) ds_map_clear(widthMap);
	} #endregion
	
	static processData = function(_outSurf, _data, _output_index, _array_index) { #region
		#region data
			var _dim   = _data[0];
			var _bg    = _data[1];
			var _seg   = _data[2];
			var _wid   = _data[3];
			var _wig   = _data[4];
			var _sed   = _data[5];
			var _ang   = _data[6] % 360;
			var _pat   = _data[7];
			var _ratio = _data[8];
			var _shift = _data[9];
		
			var _color = _data[10];
			var _widc  = _data[11];
			var _widap = _data[12];
		
			var _cap   = _data[13];
			var _capP  = _data[14];
			var _colP  = _data[15];
			var _colW  = _data[16];
			var _1px   = _data[17];
		
			var _fixL  = _data[19];
			var _segL  = _data[20];
		
			var _tex    = _data[18];
			var _texPos = _data[21];
			var _texRot = _data[22];
			var _texSca = _data[23];
		
			var _colb   = _data[24];
			var _ratInv = _data[25];
			var _clamp  = _data[26];
		#endregion
		
		if(CURRENT_FRAME == 0 || inputs[| 11].is_anim)
			ds_map_clear(widthMap);
		
		var __debug_timer = get_timer();
		
		var _rangeMin = min(_ratio[0], _ratio[1]);
		var _rangeMax = max(_ratio[0], _ratio[1]);
		if(_rangeMax == 1) _rangeMax = 0.99999;
		
		var _rtStr = min(_rangeMin, _rangeMax);
		var _rtMax = max(_rangeMin, _rangeMax);
		
		var _use_path = is_struct(_pat);
		var _useTex   = inputs[| 18].value_from != noone;
		if(_useTex) {
			_cap = false;
			_1px = false;
		}
		
		if(_ang < 0) _ang = 360 + _ang;
		
		inputs[| 6].setVisible(!_use_path);
		
		random_set_seed(_sed);
		var _sedIndex = 0;
		
		_outSurf = surface_verify(_outSurf, _dim[0], _dim[1], attrDepth());
			
		var p = new __vec2();
		var _ox, _nx, _nx1, _oy, _ny, _ny1;
		var _ow, _nw, _oa, _na, _oc, _nc, _owg, _nwg;
		var _pathData = [];
		
		if(_use_path) { #region
			var lineLen = 1;
			if(struct_has(_pat, "getLineCount"))
				lineLen = _pat.getLineCount();
			if(struct_has(_pat, "getPathData"))
				_pathData = _pat.getPathData();
			
			lines = array_verify(lines, lineLen);
			var _lineAmo = 0;
			
			if(_rtMax > 0) 
			for( var i = 0; i < lineLen; i++ ) {
				var _useDistance = _fixL && struct_has(_pat, "getLength");
				var _pathLength  = _useDistance? _pat.getLength(i) : 1;
				if(_pathLength == 0) continue;
					
				var _pathStr = _rtStr;
				var _pathEnd = _rtMax;
					
				var _stepLen = min(_pathEnd, 1 / _seg); //Distance to move per step
				if(_stepLen <= 0.00001) continue;
					
				var _total		= _pathEnd;	//Length remaining
				var _total_prev = _total;	//Use to prevent infinite loop
				var _freeze		= 0;		//Use to prevent infinite loop
					
				var _prog_curr	= _clamp? _shift : frac(_shift);		//Pointer to the current position
				var _prog_next  = 0;
				var _prog		= _prog_curr + 1;	//Record previous position to delete from _total
				var _prog_total	= 0;				//Record the distance the pointer has moved so far
				var points		= is_array(lines[i])? lines[i] : [];
				var pointArrLen = array_length(points);
				var pointAmo    = 0;
				var wght;
				var _pathPng;
					
				if(_useDistance) {						
					_pathStr   *= _pathLength;
					_pathEnd   *= _pathLength;
					_stepLen    = min(_segL, _pathEnd);
						
					_total	   *= _pathLength;
					_total_prev = _total;
						
					_prog_curr *= _pathLength;
				}
				
				var _segLength    = struct_has(_pat, "getAccuLength")? _pat.getAccuLength(i) : [];
				var _segLengthAmo = array_length(_segLength);
				var _segIndex     = 0;
				
				if(_segLengthAmo)
				while(_prog_curr > _segLength[_segIndex]) {
					_segIndex++;
					if(_segIndex == _segLengthAmo) {
						_segIndex = 0;
						break;
					}
				}
				
				//print($"===== {_prog_curr}/{_segLength} : {_segIndex} =====");
				while(_total >= 0) {
					wght = 1;
					
					if(_useDistance) {
						var segmentLength = array_safe_get(_segLength, _segIndex, _pathLength);
						
						_prog_next = min(_prog_curr + _stepLen, _pathLength, segmentLength);
						_pathPng   = _ratInv? _pathLength - _prog_curr : _prog_curr;
						
						//print($"{segmentLength}/{_pathLength} = {_prog_next}");
						if(_prog_next == segmentLength) _segIndex++;
						
						var _pp = _clamp? clamp(_pathPng, 0, _pathLength) : _pathPng
						//print($"_pp = {_pp}");
						
						p = _pat.getPointDistance(_pp, i, p);
						if(struct_has(_pat, "getWeightDistance"))
							wght = _pat.getWeightDistance(_pp, i);
					} else {
						_prog_next = min(_prog_curr + _stepLen, 1); //Move forward _stepLen or _total (if less) stop at 1
						_pathPng   = _ratInv? 1 - _prog_curr : _prog_curr;
						
						var _pp = _clamp? clamp(_pathPng, 0, 1) : _pathPng
						
						p = _pat.getPointRatio(_pp, i, p);
						if(struct_has(_pat, "getWeightRatio"))
							wght = _pat.getWeightRatio(_pp, i);
					}
					
					_nx = p.x;
					_ny = p.y;
						
					if(_total < _pathEnd) { //Do not wiggle the last point.
						var _d = point_direction(_ox, _oy, _nx, _ny);
						_nx   += lengthdir_x(random1D(_sed + _sedIndex, -_wig, _wig), _d + 90); _sedIndex++;
						_ny   += lengthdir_y(random1D(_sed + _sedIndex, -_wig, _wig), _d + 90); _sedIndex++;
					}
						
					if(_prog_total >= _pathStr) { //Do not add point before range start. Do this instead of starting at _rtStr to prevent wiggle. 
						var _pntData;
						if(pointAmo < pointArrLen && is_struct(points[pointAmo])) {
							_pntData          = points[pointAmo];
							_pntData.x        = _nx;
							_pntData.y        = _ny; 
							_pntData.prog     = (_prog_total - _pathStr) / (_pathEnd - _pathStr);
							_pntData.progCrop = _prog_curr / _pathLength;
							_pntData.weight   = wght;
						} else {
							_pntData = { 
								x:        _nx, 
								y:        _ny, 
								prog:     (_prog_total - _pathStr) / (_pathEnd - _pathStr), 
								progCrop: _prog_curr / _pathLength, 
								weight:   wght 
							}
							points[pointAmo] = _pntData;
						} 
						
						pointAmo++;
					}
					
					if(_prog_next == _prog_curr) break;
					else if(_prog_next > _prog_curr) {
						_prog_total += _prog_next - _prog_curr;
						_total      -= _prog_next - _prog_curr;
					}
					_stepLen = min(_stepLen, _total);
						
					_prog_curr = _prog_next;
					_ox		   = _nx;
					_oy		   = _ny;
						
					if(_total_prev == _total && ++_freeze > 16) break;
					_total_prev = _total;
				}
				
				array_resize(points, pointAmo);
				lines[_lineAmo++] = points;
			}
			
			array_resize(lines, _lineAmo);
		#endregion
		} else { #region
			var x0, y0, x1, y1;
			var _0 = point_rectangle_overlap(_dim[0], _dim[1], (_ang + 180) % 360);
			var _1 = point_rectangle_overlap(_dim[0], _dim[1], _ang);
			x0 = _0[0]; y0 = _0[1];
			x1 = _1[0]; y1 = _1[1];
			
			var _l = point_distance(x0, y0, x1, y1);
			var _d = point_direction(x0, y0, x1, y1);
			var _od = _d, _nd = _d;
				
			var ww          = _rtMax / _seg;
			var _total		= _rtMax;
			var _prog_curr	= frac(_shift) - ww;
			var _prog		= _prog_curr + 1;
			var _prog_total	= 0;
			var points = [];
				
			while(_total > 0) {
				if(_prog_curr >= 1) _prog_curr = 0;
				else _prog_curr = min(_prog_curr + min(_total, ww), 1);
				_prog_total += min(_total, ww);
					
				_nx = x0 + lengthdir_x(_l * _prog_curr, _d);
				_ny = y0 + lengthdir_y(_l * _prog_curr, _d);
					
				var wgLen = random1D(_sed + _sedIndex, -_wig, _wig); _sedIndex++;
				_nx += lengthdir_x(wgLen, _d + 90); 
				_ny += lengthdir_y(wgLen, _d + 90);
					
				if(_prog_total > _rtStr) //prevent drawing point before range start.
					array_push(points, { x: _nx, y: _ny, prog: _prog_total / _rtMax, progCrop: _prog_curr, weight: 1 });
					
				if(_prog_curr > _prog)
					_total -= (_prog_curr - _prog);
				_prog = _prog_curr;
				_ox = _nx;
				_oy = _ny;
			}
				
			lines = [ points ];
		} #endregion
		
		#region draw
		
		//print($"==== Drawing frame {CURRENT_FRAME} ====")
		
		surface_set_target(_outSurf);
			if(_bg) draw_clear_alpha(0, 1);
			else	DRAW_CLEAR
			
			if(_useTex) { #region
				var tex = surface_get_texture(_tex);
				
				shader_set(sh_draw_mapping);
				shader_set_f("position", _texPos);
				shader_set_f("rotation", degtorad(_texRot));
				shader_set_f("scale",    _texSca);
				
				shader_set_interpolation(_tex);
			} #endregion
			
			for( var i = 0, n = array_length(lines); i < n; i++ ) {
				var points = lines[i];
				if(array_length(points) < 2) continue;
				
				if(_useTex) draw_primitive_begin_texture(pr_trianglestrip, tex);
				else        draw_primitive_begin(pr_trianglestrip);
				
				random_set_seed(_sed + i);
				var pxs = [];
				var dat = array_safe_get(_pathData, i, noone);
				
				var _col_base = dat == noone? _colb.eval(random(1)) : dat.color;
				
				for( var j = 0; j < array_length(points); j++ ) {
					var p0   = points[j];
					var _nx  = p0.x - 0.5 * _1px;
					var _ny  = p0.y - 0.5 * _1px;
					var prog = p0.prog;
					var prgc = p0.progCrop;
					var _dir = j? point_direction(_ox, _oy, _nx, _ny) : 0;
					
					var widProg = value_snap_real(_widap? prog : prgc, 0.01);
					
					_nw  = random_range(_wid[0], _wid[1]);
					if(!ds_map_exists(widthMap, widProg))
						widthMap[? widProg] = eval_curve_x(_widc, widProg, 0.1);
					_nw *= widthMap[? widProg];
					_nw *= p0.weight;
					
					_nc = colorMultiply(_col_base, _color.eval(_colP? prog : prgc));
					
					if(_cap) { #region
						if(j == 1) {
							draw_set_color(_oc);
							
							_d = _dir + 180;
							draw_circle_angle(_ox, _oy, _ow / 2, _d - 90, _d, _capP);
							draw_circle_angle(_ox, _oy, _ow / 2, _d, _d + 90, _capP);
						}
						
						if(j == array_length(points) - 1) {
							draw_set_color(_nc);
							
							_d = _dir;
							draw_circle_angle(_nx, _ny, _nw / 2, _d - 90, _d, _capP);
							draw_circle_angle(_nx, _ny, _nw / 2, _d, _d + 90, _capP);
						}
					} #endregion
					
					if(_1px) { #region
						if(j) {
							var dst = point_distance(_ox, _oy, _nx, _ny);
							if(dst <= 1 && i < array_length(points) - 1) continue;
							draw_line_color(_ox, _oy, _nx, _ny, _oc, _nc);
						}
						
						_ox = _nx;
						_oy = _ny;
						_oc = _nc;
					#endregion
					} else { #region
						if(j) {
							var _nd0 = _dir;
							var _nd1 = _nd0;
							
							if(j < array_length(points) - 1) {
								var p2 = points[j + 1];
								var _nnx = p2.x;
								var _nny = p2.y;
						
								_nd1 = point_direction(_nx, _ny, _nnx, _nny);
								_nd = _nd0 + angle_difference(_nd1, _nd0) / 2;
							} else 
								_nd = _nd0;
							
							if(_useTex) {
								var _len = array_length(points) - 1;
								
								var ox0 = _ox + lengthdir_x(_ow / 2, _od + 90);
								var oy0 = _oy + lengthdir_y(_ow / 2, _od + 90);
								var nx0 = _nx + lengthdir_x(_nw / 2, _nd + 90);
								var ny0 = _ny + lengthdir_y(_nw / 2, _nd + 90);
	
								var ox1 = _ox + lengthdir_x(_ow / 2, _od + 90 + 180);
								var oy1 = _oy + lengthdir_y(_ow / 2, _od + 90 + 180);
								var nx1 = _nx + lengthdir_x(_nw / 2, _nd + 90 + 180);
								var ny1 = _ny + lengthdir_y(_nw / 2, _nd + 90 + 180);
								
								draw_vertex_texture_color(ox0, oy0, 0, (j - 1) / _len, _oc, 1);
								draw_vertex_texture_color(ox1, oy1, 1, (j - 1) / _len, _oc, 1);
								draw_vertex_texture_color(nx0, ny0, 0, (j - 0) / _len, _nc, 1);
								draw_vertex_texture_color(nx1, ny1, 1, (j - 0) / _len, _nc, 1);
							} else if(_colW)
								draw_line_width2_angle_width(_ox, _oy, _nx, _ny, _ow, _nw, _od + 90, _nd + 90, merge_color(_oc, c_black, 0.5), merge_color(_nc, c_black, 0.5));
							else
								draw_line_width2_angle(_ox, _oy, _nx, _ny, _ow, _nw, _od + 90, _nd + 90, _oc, _nc);
						} else {
							var p1   = points[j + 1];
							_nd = point_direction(_nx, _ny, p1.x, p1.y);
						}
					
						_ox = _nx;
						_oy = _ny;
						_od = _nd;
						_ow = _nw;
						_oc = _nc;
					}
				#endregion
				}
				
				draw_primitive_end();
			}
			
			if(_useTex) shader_reset();
		surface_reset_target();
		#endregion
		
		return _outSurf;
	} #endregion
}