88 lines
1.7 KiB
JavaScript
88 lines
1.7 KiB
JavaScript
(function(
|
|
Engine,
|
|
Vector
|
|
){
|
|
|
|
Engine.Polygon = function(a, b, c, color){
|
|
this.a = a;
|
|
this.b = b;
|
|
this.c = c;
|
|
|
|
this.color = Engine.clone(color);
|
|
this.maxL = this.color.l;
|
|
this.strokeColor = {
|
|
h: this.color.h,
|
|
s: 0,
|
|
l: 100,
|
|
a: 1
|
|
};
|
|
|
|
this.color.l = 0;
|
|
|
|
this.fillStyle = this.hslaTemplate.substitute(this.color);
|
|
this.strokeStyle = this.hslaTemplate.substitute(this.strokeColor);
|
|
};
|
|
|
|
Engine.Polygon.prototype = {
|
|
|
|
rgbaTemplate: 'rgba({r},{g},{b},{a})',
|
|
hslaTemplate: 'hsla({h},{s}%,{l}%,{a})',
|
|
|
|
hueShiftSpeed: 20,
|
|
duration: 2,
|
|
delay: 0,
|
|
start: 0,
|
|
|
|
// Determine color fill?
|
|
update: function(engine){
|
|
var delta;
|
|
|
|
this.start += engine.tick;
|
|
|
|
delta = this.start;
|
|
|
|
if (
|
|
delta > this.delay &&
|
|
delta < this.delay + this.duration + 1 &&
|
|
this.color.l < this.maxL
|
|
) {
|
|
this.color.l = this.maxL * (delta - this.delay) / this.duration;
|
|
|
|
this.strokeColor.s = this.color.s * (delta - this.delay) / this.duration;
|
|
this.strokeColor.l = (this.maxL - 100) * (delta - this.delay) / this.duration + 100;
|
|
|
|
if (this.color.l > this.maxL) {
|
|
this.color.l = this.maxL;
|
|
}
|
|
|
|
this.strokeStyle = this.hslaTemplate.substitute(this.strokeColor);
|
|
this.fillStyle = this.hslaTemplate.substitute(this.color);
|
|
}
|
|
},
|
|
|
|
draw: function(ctx, scale){
|
|
ctx.beginPath();
|
|
ctx.moveTo(
|
|
this.a.pos.x * scale,
|
|
this.a.pos.y * scale
|
|
);
|
|
ctx.lineTo(
|
|
this.b.pos.x * scale,
|
|
this.b.pos.y * scale
|
|
);
|
|
ctx.lineTo(
|
|
this.c.pos.x * scale,
|
|
this.c.pos.y * scale
|
|
);
|
|
ctx.closePath();
|
|
ctx.fillStyle = this.fillStyle;
|
|
ctx.lineWidth = 0.25 * scale;
|
|
ctx.strokeStyle = this.strokeStyle;
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
}
|
|
|
|
};
|
|
|
|
})(window.Engine, window.Vector);
|