QkoSad
60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
class Road {
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constructor(x, width, laneCount = 5) {
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this.x = x;
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this.width = width;
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this.laneCount = laneCount;
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this.left = x - width / 2;
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this.right = x + width / 2;
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const infinity = 1000000;
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this.top = -infinity;
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this.bottom = infinity;
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const topLeft = { x: this.left, y: this.top };
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const topRight = { x: this.right, y: this.top };
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const bottomLeft = { x: this.left, y: this.bottom };
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const bottomRight = { x: this.right, y: this.bottom };
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this.borders = [
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[topLeft, bottomLeft],
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[topRight, bottomRight],
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];
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}
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getLaneCenter(laneIndex) {
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const laneWidth = this.width / this.laneCount;
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return (
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this.left +
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laneWidth / 2 +
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Math.min(laneIndex, this.laneCount - 1) * laneWidth
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);
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}
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draw(ctx) {
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ctx.lineWidth = 5;
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ctx.strokeStyle = "white";
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for (let i = 1; i <= this.laneCount - 1; i++) {
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const x = lerp(
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this.left,
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this.right,
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i / this.laneCount
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);
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ctx.setLineDash([20, 20]);
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ctx.beginPath();
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ctx.moveTo(x, this.top);
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ctx.lineTo(x, this.bottom);
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ctx.stroke();
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}
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ctx.setLineDash([]);
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this.borders.forEach((border) => {
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ctx.beginPath();
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ctx.moveTo(border[0].x, border[0].y);
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ctx.lineTo(border[1].x, border[1].y);
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ctx.stroke();
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});
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}
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}
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