function Brush() { Module.call(this,"brush"); this.speed = 0; this.pointers = [ new Pointer({offset:{x:0,y:0}}) ]; this.methods.add = new Method("add","x,y&mirror_x,mirror_y","Add a new pointer to the brush",function(q){ var offset = q.length ? q[0] : q; var mirror = q.length ? q[1] : null; ronin.brush.pointers.push(new Pointer({offset:offset,mirror:mirror})); }) this.methods.remove = new Method("remove","","Remove last pointer",function(q){ ronin.brush.pointers.pop(); }) this.methods.pick = new Method("pick","x,y","Set brush color to a position's pixel.",function(q){ var pixel = (ronin.commander.input_el.value == "~" ? ronin.guide: ronin.cursor.target).context() .getImageData(q.x*2, q.y*2, 1, 1).data; var c = new Color().rgb_to_hex(pixel); var color = new Color(c); ronin.cursor.color = color.hex; ronin.hint.update(); }) this.methods.set_color = new Method("set_color","#ff0033","Set color",function(q){ ronin.cursor.color = q; }) this.absolute_thickness = 0; this.thickness = function(line) { var ratio = clamp(1 - (ronin.brush.speed/20),0,1) var t = ronin.cursor.size * ratio; this.absolute_thickness = t > this.absolute_thickness ? this.absolute_thickness+0.25 : this.absolute_thickness-0.25; return this.absolute_thickness * 3; } this.stroke = function(line) { ronin.commander.blur(); this.speed = distance_between(line.from,line.to); for(pointer_id in this.pointers){ this.pointers[pointer_id].stroke(line); } } this.pick = function(line) { if(!line.to){ line.to = line.from } var pixel = ronin.cursor.target.context().getImageData(line.to.x*2, line.to.y*2, 1, 1).data; } this.mod_size = function(mod) { ronin.cursor.size = clamp(parseInt(ronin.cursor.size)+mod,1,100); } function clamp(v, min, max) { return v < min ? min : v > max ? max : v; } function distance_between(a,b) { return a && b ? Math.sqrt( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) ) : 0; } } function Pointer(options) { this.options = options; this.thickness = function(line) { return ronin.brush.thickness(line); } this.color = function(line) { return ronin.cursor.color; } this.stroke = function(line) { var ctx = ronin.cursor.target.context(); if(this.options.mirror){ line.from.x = (this.options.mirror.x *2) - line.from.x; line.to.x = (this.options.mirror.x*2) - line.to.x; } if(!line.to){ line.to = line.from } var ratio = clamp((ronin.brush.speed/20),0,1) ctx.beginPath(); ctx.globalCompositeOperation = ronin.keyboard.is_down["Alt"] ? "destination-out" : "source-over"; ctx.moveTo((line.from.x * 2) + this.options.offset.x,(line.from.y * 2) + this.options.offset.y); ctx.lineTo((line.to.x * 2) + this.options.offset.x,(line.to.y * 2) + this.options.offset.y); ctx.lineCap="round"; ctx.lineWidth = this.thickness(line); ctx.strokeStyle = ronin.cursor.color; ctx.stroke(); ctx.closePath(); } function clamp(v, min, max) { return v < min ? min : v > max ? max : v; } }