63 lines
2.0 KiB
JavaScript
63 lines
2.0 KiB
JavaScript
function Pointer(offset = new Position(), color = new Color('000000'))
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{
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this.offset = offset;
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this.mirror = null;
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this.noise = null;
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this.position_prev = null;
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this.draw = function()
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{
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if(!this.position_prev){this.position_prev = this.position(); }
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if(ronin.brush.size < 0){ this.erase(); return; }
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var position = this.position();
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if(this.noise){
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position.x += (Math.random() * this.noise) - (this.noise/2);
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position.y += (Math.random() * this.noise) - (this.noise/2);
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}
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ronin.canvas.context().beginPath();
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ronin.canvas.context().moveTo(this.position_prev.x,this.position_prev.y);
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ronin.canvas.context().lineTo(position.x,position.y);
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ronin.canvas.context().lineCap="round";
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ronin.canvas.context().lineWidth = this.thickness();
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ronin.canvas.context().strokeStyle = ronin.brush.color.rgba();
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ronin.canvas.context().stroke();
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ronin.canvas.context().closePath();
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this.position_prev = position;
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}
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this.erase = function()
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{
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ronin.canvas.context().clearRect(this.position().x - (ronin.brush.size/2), this.position().y - (ronin.brush.size/2), ronin.brush.size, ronin.brush.size);
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}
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this.thickness = function()
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{
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var ratio = 10/this.position().distance_to(this.position_prev);
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ratio = ratio > 1 ? 1 : ratio;
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return ronin.brush.size * ratio;
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}
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this.position = function()
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{
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if(this.mirror && this.mirror.width > 0){
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return new Position(this.mirror.width - (ronin.brush.position.x + this.offset.x), 0 + (ronin.brush.position.y + this.offset.y));
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}
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else if(this.mirror && this.mirror.height > 0){
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return new Position((ronin.brush.position.x + this.offset.x), this.mirror.height - (ronin.brush.position.y + this.offset.y));
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}
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return new Position(ronin.brush.position.x + this.offset.x, ronin.brush.position.y + this.offset.y);
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}
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this.start = function()
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{
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}
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this.stop = function()
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{
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this.position_prev = null;
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}
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} |