131 lines
3.6 KiB
JavaScript
131 lines
3.6 KiB
JavaScript
function Brush()
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{
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Module.call(this,"brush");
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this.settings = {size:4,color:"#000"};
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this.pointers = [
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new Pointer({offset:{x:0,y:0}}),
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new Pointer({offset:{x:0,y:0},mirror:{x:400,y:0}})
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];
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this.ports.speed = new Port(this,"speed",false,true,0,50,"The cursor speed");
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this.ports.distance = new Port(this,"distance",false,true,0,9999,"The cursor distance");
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this.ports.red = new Port(this,"red",true,true,0,255,"The brush color value(red)");
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this.ports.green = new Port(this,"green",true,true,0,255,"The brush color value(green)");
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this.ports.blue = new Port(this,"blue",true,true,0,255,"The brush color value(blue)");
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this.methods.add = new Method("add","x,y&mirror_x,mirror_y","Add a new pointer to the brush",function(q){
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var offset = q.length ? q[0] : q;
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var mirror = q.length ? q[1] : null;
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ronin.brush.pointers.push(new Pointer({offset:offset,mirror:mirror}));
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})
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this.methods.remove = new Method("remove","","Remove last pointer",function(q){
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ronin.brush.pointers.pop();
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})
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this.methods.pick = new Method("pick","x,y","Set brush color to a position's pixel.",function(q){
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var pixel = ronin.render.context().getImageData(q.x*2, q.y*2, 1, 1).data;
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var c = new Color().rgb_to_hex(pixel);
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var color = new Color(c);
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ronin.brush.settings.color = color.hex;
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})
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this.absolute_thickness = 0;
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this.thickness = function(line)
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{
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var t = this.settings.size * this.ports.speed;
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this.absolute_thickness = t > this.absolute_thickness ? this.absolute_thickness+0.5 : this.absolute_thickness-0.5;
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return this.absolute_thickness * 3;
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}
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this.stroke = function(line)
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{
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ronin.commander.blur();
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this.ports.speed = 1-distance_between(line.from,line.to)/15.0;
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this.ports.distance += this.ports.speed;
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// this.ports.noise = Math.random(255/255.0);
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// this.ports.x = line.from.x/2;
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for(pointer_id in this.pointers){
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this.pointers[pointer_id].stroke(line);
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}
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}
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this.erase = function(line)
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{
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var ctx = ronin.render.context();
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ctx.beginPath();
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ctx.globalCompositeOperation="destination-out";
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ctx.moveTo(line.from.x * 2,line.from.y * 2);
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ctx.lineTo(line.to.x * 2,line.to.y * 2);
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ctx.lineCap="round";
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ctx.lineWidth = this.thickness(line);
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ctx.stroke();
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ctx.closePath();
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}
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this.pick = function(line)
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{
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var pixel = ronin.render.context().getImageData(line.to.x*2, line.to.y*2, 1, 1).data;
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}
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this.mod_size = function(mod)
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{
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this.settings.size = clamp(this.settings.size+mod,1,100);
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}
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function clamp(v, min, max)
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{
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return v < min ? min : v > max ? max : v;
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}
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function distance_between(a,b)
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{
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return Math.sqrt( (a.x-b.x)*(a.x-b.x) + (a.y-b.y)*(a.y-b.y) );
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}
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}
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function Pointer(options)
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{
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this.options = options;
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this.thickness = function(line)
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{
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return ronin.brush.thickness(line);
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}
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this.color = function(line)
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{
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return ronin.brush.settings.color;
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}
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this.stroke = function(line)
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{
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var ctx = ronin.render.context();
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if(this.options.mirror){
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line.from.x = this.options.mirror.x - line.from.x;
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line.to.x = this.options.mirror.x - line.to.x;
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}
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ctx.beginPath();
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ctx.globalCompositeOperation="source-over";
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ctx.moveTo((line.from.x * 2) + this.options.offset.x,(line.from.y * 2) + this.options.offset.y);
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ctx.lineTo((line.to.x * 2) + this.options.offset.x,(line.to.y * 2) + this.options.offset.y);
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ctx.lineCap="round";
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ctx.lineWidth = this.thickness(line);
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ctx.strokeStyle = ronin.brush.settings.color;
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ctx.stroke();
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ctx.closePath();
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}
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function clamp(v, min, max)
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{
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return v < min ? min : v > max ? max : v;
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}
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} |