86 lines
1.8 KiB
JavaScript
86 lines
1.8 KiB
JavaScript
class State {
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constructor(x, y, color) {
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this.x = x;
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this.y = y;
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this.color = color;
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this.text = '';
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}
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draw() {
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ctx.fillStyle = this.color;
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ctx.strokeStyle = '#000';
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ctx.beginPath();
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ctx.arc(this.x, this.y, radius, 0, 360);
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ctx.fill();
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ctx.stroke();
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ctx.closePath();
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}
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jumpTo(x, y) {
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this.x = Math.min(Math.max(x, 0), width);
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this.y = Math.min(Math.max(y, 0), height);
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}
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moveTo(x, y) {
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x = Math.min(Math.max(0, x), width);
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y = Math.min(Math.max(0, y), height);
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this.goal = {
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x, y
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};
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const angle = this.direction(x, y);
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this.v = {
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x: settings.speed * Math.cos(angle),
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y: settings.speed * Math.sin(angle)
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};
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}
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moveToStep() {
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this.x += this.v.x;
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this.y += this.v.y;
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if ((this.v.x > 0 && this.goal.x <= this.x) || (this.v.x < 0 && this.goal.x >= this.x)) {
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this.x = this.goal.x;
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this.v.x = 0;
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}
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if((this.v.y > 0 && this.goal.y <= this.y) || (this.v.y < 0 && this.goal.y >= this.y)) {
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this.y = this.goal.y;
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this.v.y = 0;
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}
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}
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intersection(state) {
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return -Math.hypot(this.x - state.x, this.y - state.y) + radius * 2;
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}
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intersects(state) {
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return this.intersection(state) > 0;
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}
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directionTo(state) {
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return this.direction(state.x, state.y);
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}
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direction(x, y) {
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return Math.atan2(this.y - y, this.x - x);
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}
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closestPointOnCircle(x, y) {
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const dx = x - this.x;
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const dy = y - this.y;
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const scale = Math.sqrt(dx ^ 2 + dy ^ 2);
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return {
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x: this.x + dx * radius / scale,
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y: this.y + dy * radius / scale,
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};
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}
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}
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