541 lines
16 KiB
JavaScript
541 lines
16 KiB
JavaScript
// deno-fmt-ignore-file
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// deno-lint-ignore-file
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// This code was bundled using `deno bundle` and it's not recommended to edit it manually
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const Constants = {
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TWO_PI: Math.PI * 2
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};
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class Vector {
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x;
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y;
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z;
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constructor(x = 0, y = 0, z = 0){
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this.x = x;
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this.y = y;
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this.z = z;
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}
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set(v, y, z) {
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if (arguments.length === 1 && typeof v !== "number") {
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this.set(v.x || v[0] || 0, v.y || v[1] || 0, v.z || v[2] || 0);
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} else {
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this.x = v;
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this.y = y || 0;
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this.z = z || 0;
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}
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}
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get() {
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return new Vector(this.x, this.y, this.z);
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}
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mag() {
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const x = this.x, y = this.y, z = this.z;
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return Math.sqrt(x * x + y * y + z * z);
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}
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magSq() {
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const x = this.x, y = this.y, z = this.z;
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return x * x + y * y + z * z;
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}
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setMag(v_or_len, len) {
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if (len === undefined) {
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len = v_or_len;
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this.normalize();
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this.mult(len);
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} else {
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const v = v_or_len;
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v.normalize();
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v.mult(len);
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return v;
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}
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}
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add(v, y, z) {
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if (arguments.length === 1 && typeof v !== 'number') {
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this.x += v.x;
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this.y += v.y;
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this.z += v.z;
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} else if (arguments.length === 2) {
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this.x += v;
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this.y += y ?? 0;
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} else {
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this.x += v;
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this.y += y ?? 0;
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this.z += z ?? 0;
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}
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return this;
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}
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sub(v, y, z) {
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if (arguments.length === 1 && typeof v !== 'number') {
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this.x -= v.x;
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this.y -= v.y;
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this.z -= v.z;
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} else if (arguments.length === 2) {
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this.x -= v;
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this.y -= y ?? 0;
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} else {
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this.x -= v;
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this.y -= y ?? 0;
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this.z -= z ?? 0;
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}
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return this;
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}
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mult(v) {
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if (typeof v === 'number') {
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this.x *= v;
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this.y *= v;
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this.z *= v;
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} else {
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this.x *= v.x;
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this.y *= v.y;
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this.z *= v.z;
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}
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return this;
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}
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div(v) {
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if (typeof v === 'number') {
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this.x /= v;
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this.y /= v;
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this.z /= v;
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} else {
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this.x /= v.x;
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this.y /= v.y;
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this.z /= v.z;
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}
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return this;
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}
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rotate(angle) {
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const prev_x = this.x;
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const c = Math.cos(angle);
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const s = Math.sin(angle);
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this.x = c * this.x - s * this.y;
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this.y = s * prev_x + c * this.y;
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return this;
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}
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dist(v) {
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const dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;
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return Math.sqrt(dx * dx + dy * dy + dz * dz);
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}
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dot(v, y, z) {
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if (arguments.length === 1 && typeof v !== 'number') {
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return this.x * v.x + this.y * v.y + this.z * v.z;
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}
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return this.x * v + this.y * y + this.z * z;
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}
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cross(v) {
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const x = this.x, y = this.y, z = this.z;
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return new Vector(y * v.z - v.y * z, z * v.x - v.z * x, x * v.y - v.x * y);
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}
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lerp(v_or_x, amt_or_y, z, amt) {
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const lerp_val = (start, stop, amt)=>{
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return start + (stop - start) * amt;
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};
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let x, y;
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if (arguments.length === 2 && typeof v_or_x !== 'number') {
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amt = amt_or_y;
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x = v_or_x.x;
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y = v_or_x.y;
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z = v_or_x.z;
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} else {
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x = v_or_x;
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y = amt_or_y;
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}
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this.x = lerp_val(this.x, x, amt);
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this.y = lerp_val(this.y, y, amt);
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this.z = lerp_val(this.z, z, amt);
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return this;
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}
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normalize() {
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const m = this.mag();
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if (m > 0) {
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this.div(m);
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}
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return this;
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}
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limit(high) {
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if (this.mag() > high) {
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this.normalize();
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this.mult(high);
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}
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return this;
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}
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heading() {
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return -Math.atan2(-this.y, this.x);
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}
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heading2D() {
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return this.heading();
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}
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toString() {
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return "[" + this.x + ", " + this.y + ", " + this.z + "]";
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}
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array() {
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return [
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this.x,
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this.y,
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this.z
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];
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}
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copy() {
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return new Vector(this.x, this.y, this.z);
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}
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drawDot() {
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if (!doodler) return;
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doodler.dot(this, {
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weight: 2,
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color: 'red'
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});
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}
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static fromAngle(angle, v) {
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if (v === undefined || v === null) {
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v = new Vector();
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}
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v.x = Math.cos(angle);
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v.y = Math.sin(angle);
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return v;
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}
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static random2D(v) {
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return Vector.fromAngle(Math.random() * (Math.PI * 2), v);
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}
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static random3D(v) {
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const angle = Math.random() * Constants.TWO_PI;
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const vz = Math.random() * 2 - 1;
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const mult = Math.sqrt(1 - vz * vz);
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const vx = mult * Math.cos(angle);
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const vy = mult * Math.sin(angle);
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if (v === undefined || v === null) {
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v = new Vector(vx, vy, vz);
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} else {
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v.set(vx, vy, vz);
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}
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return v;
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}
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static dist(v1, v2) {
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return v1.dist(v2);
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}
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static dot(v1, v2) {
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return v1.dot(v2);
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}
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static cross(v1, v2) {
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return v1.cross(v2);
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}
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static add(v1, v2) {
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return new Vector(v1.x + v2.x, v1.y + v2.y, v1.z + v2.z);
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}
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static sub(v1, v2) {
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return new Vector(v1.x - v2.x, v1.y - v2.y, v1.z - v2.z);
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}
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static angleBetween(v1, v2) {
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return Math.acos(v1.dot(v2) / Math.sqrt(v1.magSq() * v2.magSq()));
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}
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static lerp(v1, v2, amt) {
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const retval = new Vector(v1.x, v1.y, v1.z);
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retval.lerp(v2, amt);
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return retval;
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}
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static vectorProjection(v1, v2) {
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v2 = v2.copy();
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v2.normalize();
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const sp = v1.dot(v2);
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v2.mult(sp);
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return v2;
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}
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static hypot2(a, b) {
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return Vector.dot(Vector.sub(a, b), Vector.sub(a, b));
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}
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}
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const init = (opt)=>{
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if (window.doodler) throw 'Doodler has already been initialized in this window';
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window.doodler = new Doodler(opt);
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window.doodler.init();
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};
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class Doodler {
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ctx;
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_canvas;
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layers = [];
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bg;
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framerate;
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get width() {
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return this.ctx.canvas.width;
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}
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get height() {
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return this.ctx.canvas.height;
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}
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draggables = [];
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clickables = [];
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constructor({ width , height , canvas , bg , framerate }){
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if (!canvas) {
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canvas = document.createElement('canvas');
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document.body.append(canvas);
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}
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this.bg = bg || 'white';
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this.framerate = framerate || 60;
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canvas.width = width;
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canvas.height = height;
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this._canvas = canvas;
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const ctx = canvas.getContext('2d');
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console.log(ctx);
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if (!ctx) throw 'Unable to initialize Doodler: Canvas context not found';
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this.ctx = ctx;
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}
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init() {
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this._canvas.addEventListener('mousedown', (e)=>this.onClick(e));
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this._canvas.addEventListener('mouseup', (e)=>this.offClick(e));
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this._canvas.addEventListener('mousemove', (e)=>{
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const rect = this._canvas.getBoundingClientRect();
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this.mouseX = e.clientX - rect.left;
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this.mouseY = e.clientY - rect.top;
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for (const d of this.draggables.filter((d)=>d.beingDragged)){
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d.point.add(e.movementX, e.movementY);
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}
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});
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this.startDrawLoop();
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}
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timer;
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startDrawLoop() {
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this.timer = setInterval(()=>this.draw(), 1000 / this.framerate);
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}
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draw() {
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this.ctx.fillStyle = this.bg;
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this.ctx.fillRect(0, 0, this.width, this.height);
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for (const [i, l] of (this.layers || []).entries()){
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l(this.ctx, i);
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}
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this.drawUI();
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}
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createLayer(layer) {
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this.layers.push(layer);
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}
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deleteLayer(layer) {
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this.layers = this.layers.filter((l)=>l !== layer);
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}
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moveLayer(layer, index) {
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let temp = this.layers.filter((l)=>l !== layer);
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temp = [
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...temp.slice(0, index),
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layer,
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...temp.slice(index)
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];
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this.layers = temp;
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}
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line(start, end, style) {
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this.setStyle(style);
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this.ctx.beginPath();
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this.ctx.moveTo(start.x, start.y);
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this.ctx.lineTo(end.x, end.y);
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this.ctx.stroke();
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}
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dot(at, style) {
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this.setStyle({
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...style,
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weight: 1
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});
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this.ctx.beginPath();
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this.ctx.arc(at.x, at.y, style?.weight || 1, 0, Constants.TWO_PI);
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this.ctx.fill();
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}
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drawCircle(at, radius, style) {
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this.setStyle(style);
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this.ctx.beginPath();
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this.ctx.arc(at.x, at.y, radius, 0, Constants.TWO_PI);
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this.ctx.stroke();
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}
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fillCircle(at, radius, style) {
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this.setStyle(style);
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this.ctx.beginPath();
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this.ctx.arc(at.x, at.y, radius, 0, Constants.TWO_PI);
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this.ctx.fill();
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}
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drawRect(at, width, height, style) {
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this.setStyle(style);
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this.ctx.strokeRect(at.x, at.y, width, height);
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}
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fillRect(at, width, height, style) {
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this.setStyle(style);
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this.ctx.fillRect(at.x, at.y, width, height);
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}
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drawSquare(at, size, style) {
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this.drawRect(at, size, size, style);
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}
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fillSquare(at, size, style) {
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this.fillRect(at, size, size, style);
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}
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drawCenteredRect(at, width, height, style) {
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this.ctx.save();
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this.ctx.translate(-width / 2, -height / 2);
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this.drawRect(at, width, height, style);
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this.ctx.restore();
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}
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fillCenteredRect(at, width, height, style) {
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this.ctx.save();
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this.ctx.translate(-width / 2, -height / 2);
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this.fillRect(at, width, height, style);
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this.ctx.restore();
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}
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drawCenteredSquare(at, size, style) {
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this.drawCenteredRect(at, size, size, style);
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}
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fillCenteredSquare(at, size, style) {
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this.fillCenteredRect(at, size, size, style);
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}
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drawBezier(a, b, c, d, style) {
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this.setStyle(style);
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this.ctx.beginPath();
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this.ctx.moveTo(a.x, a.y);
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this.ctx.bezierCurveTo(b.x, b.y, c.x, c.y, d.x, d.y);
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this.ctx.stroke();
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}
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drawRotated(origin, angle, cb) {
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this.ctx.save();
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this.ctx.translate(origin.x, origin.y);
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this.ctx.rotate(angle);
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this.ctx.translate(-origin.x, -origin.y);
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cb();
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this.ctx.restore();
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}
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drawImage(img, at, w, h) {
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w && h ? this.ctx.drawImage(img, at.x, at.y, w, h) : this.ctx.drawImage(img, at.x, at.y);
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}
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drawSprite(img, spritePos, sWidth, sHeight, at, width, height) {
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this.ctx.drawImage(img, spritePos.x, spritePos.y, sWidth, sHeight, at.x, at.y, width, height);
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}
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setStyle(style) {
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const ctx = this.ctx;
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ctx.fillStyle = style?.color || style?.fillColor || 'black';
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ctx.strokeStyle = style?.color || style?.strokeColor || 'black';
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ctx.lineWidth = style?.weight || 1;
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}
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mouseX = 0;
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mouseY = 0;
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registerDraggable(point, radius, style) {
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if (this.draggables.find((d)=>d.point === point)) return;
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const id = this.addUIElement('circle', point, radius, {
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fillColor: '#5533ff50',
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strokeColor: '#5533ff50'
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});
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this.draggables.push({
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point,
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radius,
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style,
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id
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});
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}
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unregisterDraggable(point) {
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for (const d of this.draggables){
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if (d.point === point) {
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this.removeUIElement(d.id);
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}
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}
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this.draggables = this.draggables.filter((d)=>d.point !== point);
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}
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registerClickable(p1, p2, cb) {
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const top = Math.min(p1.y, p2.y);
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const left = Math.min(p1.x, p2.x);
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const bottom = Math.max(p1.y, p2.y);
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const right = Math.max(p1.x, p2.x);
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this.clickables.push({
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onClick: cb,
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checkBound: (p)=>p.y >= top && p.x >= left && p.y <= bottom && p.x <= right
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});
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}
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unregisterClickable(cb) {
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this.clickables = this.clickables.filter((c)=>c.onClick !== cb);
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}
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addDragEvents({ onDragEnd , onDragStart , point }) {
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const d = this.draggables.find((d)=>d.point === point);
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if (d) {
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d.onDragEnd = onDragEnd;
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d.onDragStart = onDragStart;
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}
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}
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onClick(e) {
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const mouse = new Vector(this.mouseX, this.mouseY);
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for (const d of this.draggables){
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if (d.point.dist(mouse) <= d.radius) {
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d.beingDragged = true;
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d.onDragStart?.call(null);
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} else d.beingDragged = false;
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}
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for (const c of this.clickables){
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if (c.checkBound(mouse)) {
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c.onClick();
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}
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}
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}
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offClick(e) {
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for (const d of this.draggables){
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d.beingDragged = false;
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d.onDragEnd?.call(null);
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}
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}
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uiElements = new Map();
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uiDrawing = {
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rectangle: (...args)=>{
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!args[3].noFill && this.fillRect(args[0], args[1], args[2], args[3]);
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!args[3].noStroke && this.drawRect(args[0], args[1], args[2], args[3]);
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},
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square: (...args)=>{
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!args[2].noFill && this.fillSquare(args[0], args[1], args[2]);
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!args[2].noStroke && this.drawSquare(args[0], args[1], args[2]);
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},
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circle: (...args)=>{
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!args[2].noFill && this.fillCircle(args[0], args[1], args[2]);
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!args[2].noStroke && this.drawCircle(args[0], args[1], args[2]);
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}
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};
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drawUI() {
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for (const [shape, ...args] of this.uiElements.values()){
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this.uiDrawing[shape].apply(null, args);
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}
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}
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addUIElement(shape, ...args) {
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const id = crypto.randomUUID();
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for (const arg of args){
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delete arg.color;
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}
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this.uiElements.set(id, [
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shape,
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...args
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]);
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return id;
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}
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removeUIElement(id) {
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this.uiElements.delete(id);
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}
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}
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init({
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width: 400,
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height: 400
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});
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const movingVector = new Vector(100, 300);
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let angleMultiplier = 0;
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const v = new Vector(30, 30);
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doodler.registerDraggable(v, 20);
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const img = new Image();
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img.src = './EngineSprites.png';
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img.hidden;
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document.body.append(img);
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doodler.createLayer(()=>{
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doodler.line(new Vector(100, 100), new Vector(200, 200));
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doodler.dot(new Vector(300, 300));
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doodler.fillCircle(movingVector, 6, {
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color: 'red'
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});
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doodler.drawRect(new Vector(50, 50), movingVector.x, movingVector.y);
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doodler.fillRect(new Vector(200, 250), 30, 10);
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doodler.drawCenteredSquare(new Vector(200, 200), 40, {
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color: 'purple',
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weight: 5
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});
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doodler.drawBezier(new Vector(100, 150), movingVector, new Vector(150, 300), new Vector(100, 250));
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let rotatedOrigin = new Vector(200, 200);
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doodler.drawRotated(rotatedOrigin, Math.PI * angleMultiplier, ()=>{
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doodler.drawCenteredSquare(rotatedOrigin, 30);
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doodler.drawSprite(img, new Vector(0, 40), 80, 20, new Vector(160, 300), 80, 20);
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});
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movingVector.set((movingVector.x + 1) % 400, movingVector.y);
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angleMultiplier += .001;
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doodler.drawSprite(img, new Vector(0, 40), 80, 20, new Vector(100, 300), 80, 20);
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});
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document.addEventListener('keyup', (e)=>{
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e.preventDefault();
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if (e.key === ' ') {
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doodler.unregisterDraggable(v);
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}
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});
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