accounts-frontend/src/components/ui/bsod/Box.js

100 lines
2.5 KiB
JavaScript
Raw Normal View History

export default class Box {
constructor({ size, startX, startY, startRotate, color, shadowColor }) {
this.color = color;
this.shadowColor = shadowColor;
this.setSize(size);
this.x = startX;
this.y = startY;
this.angle = startRotate;
this.shadowLength = 2000; // TODO: should be calculated
}
get size() {
return this._initialSize;
}
get dots() {
const full = (Math.PI * 2) / 4;
const p1 = {
x: this.x + this.halfSize * Math.sin(this.angle),
y: this.y + this.halfSize * Math.cos(this.angle),
};
const p2 = {
x: this.x + this.halfSize * Math.sin(this.angle + full),
y: this.y + this.halfSize * Math.cos(this.angle + full),
};
const p3 = {
x: this.x + this.halfSize * Math.sin(this.angle + full * 2),
y: this.y + this.halfSize * Math.cos(this.angle + full * 2),
};
const p4 = {
x: this.x + this.halfSize * Math.sin(this.angle + full * 3),
y: this.y + this.halfSize * Math.cos(this.angle + full * 3),
};
return { p1, p2, p3, p4 };
}
rotate() {
const speed = (60 - this.halfSize) / 20;
this.angle += speed * 0.002;
this.x += speed;
this.y += speed;
}
draw(ctx) {
const { dots } = this;
ctx.beginPath();
ctx.moveTo(dots.p1.x, dots.p1.y);
ctx.lineTo(dots.p2.x, dots.p2.y);
ctx.lineTo(dots.p3.x, dots.p3.y);
ctx.lineTo(dots.p4.x, dots.p4.y);
ctx.fillStyle = this.color;
ctx.fill();
}
drawShadow(ctx, light) {
const { dots } = this;
const angles = [];
const points = [];
for (const i in dots) {
if (!dots.hasOwnProperty(i)) {
continue;
}
const dot = dots[i];
const angle = Math.atan2(light.y - dot.y, light.x - dot.x);
const endX = dot.x + this.shadowLength * Math.sin(-angle - Math.PI / 2);
const endY = dot.y + this.shadowLength * Math.cos(-angle - Math.PI / 2);
angles.push(angle);
points.push({
endX,
endY,
startX: dot.x,
startY: dot.y,
});
}
for (let i = points.length - 1; i >= 0; i--) {
const n = i === 3 ? 0 : i + 1;
ctx.beginPath();
ctx.moveTo(points[i].startX, points[i].startY);
ctx.lineTo(points[n].startX, points[n].startY);
ctx.lineTo(points[n].endX, points[n].endY);
ctx.lineTo(points[i].endX, points[i].endY);
ctx.fillStyle = this.shadowColor;
ctx.fill();
}
}
setSize(size) {
this._initialSize = size;
this.halfSize = Math.floor(size / 2);
}
}