1236 lines
38 KiB
JavaScript
1236 lines
38 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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if (typeof x === "number") {
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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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} else {
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this.x = x.x;
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this.y = x.y || y;
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this.z = x.z || z;
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}
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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 || 0;
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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 || 0);
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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(color) {
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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: color || "red"
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});
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}
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draw(origin) {
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if (!doodler) return;
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const startPoint = origin ? new Vector(origin) : new Vector();
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doodler.line(startPoint, startPoint.copy().add(this.copy().normalize().mult(100)));
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}
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normal(v) {
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if (!v) return new Vector(-this.y, this.x);
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const dx = v.x - this.x;
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const dy = v.y - this.y;
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return new Vector(-dy, dx);
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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 val = new Vector(v1.x, v1.y, v1.z);
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val.lerp(v2, amt);
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return val;
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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 vectorProjectionAndDot(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 [
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v2,
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sp
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];
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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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class OriginVector extends Vector {
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origin;
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get halfwayPoint() {
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return {
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x: this.mag() / 2 * Math.sin(this.heading()) + this.origin.x,
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y: this.mag() / 2 * Math.cos(this.heading()) + this.origin.y
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};
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}
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constructor(origin, p){
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super(p.x, p.y, p.z);
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this.origin = origin;
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}
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static from(origin, p) {
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const v = {
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x: p.x - origin.x,
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y: p.y - origin.y
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};
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return new OriginVector(origin, v);
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}
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}
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function satCollisionSpline(p, spline) {
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for(let i = 0; i < 100; i++){
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const t1 = i / 100;
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const t2 = (i + 1) / 100;
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const segmentStart = spline.getPointAtT(t1);
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const segmentEnd = spline.getPointAtT(t2);
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if (segmentIntersectsPolygon(p, segmentStart, segmentEnd)) {
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return true;
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}
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}
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return false;
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}
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function segmentIntersectsPolygon(p, start, end) {
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const edges = p.getEdges();
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for (const edge of edges){
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const axis = edge.copy().normal().normalize();
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const proj1 = projectPolygonOntoAxis(p, axis);
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const proj2 = projectSegmentOntoAxis(start, end, axis);
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if (!overlap(proj1, proj2)) {
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return false;
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}
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}
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return true;
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}
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function projectPolygonOntoAxis(p, axis) {
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let min = Infinity;
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let max = -Infinity;
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for (const point of p.points){
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const dotProduct = point.copy().add(p.center).dot(axis);
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min = Math.min(min, dotProduct);
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max = Math.max(max, dotProduct);
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}
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return {
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min,
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max
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};
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}
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function projectSegmentOntoAxis(start, end, axis) {
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const dotProductStart = start.dot(axis);
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const dotProductEnd = end.dot(axis);
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return {
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min: Math.min(dotProductStart, dotProductEnd),
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max: Math.max(dotProductStart, dotProductEnd)
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};
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}
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function overlap(proj1, proj2) {
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return proj1.min <= proj2.max && proj1.max >= proj2.min;
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}
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const easeInOut = (x)=>x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
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const map = (value, x1, y1, x2, y2)=>(value - x1) * (y2 - x2) / (y1 - x1) + x2;
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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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dragTarget;
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constructor({ width, height, canvas, bg, framerate }, postInit){
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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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if (!ctx) throw "Unable to initialize Doodler: Canvas context not found";
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this.ctx = ctx;
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postInit?.(this.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)=>this.onDrag(e));
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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.clearRect(0, 0, this.width, this.height);
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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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this.drawDeferred();
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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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drawScaled(scale, cb) {
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this.ctx.save();
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this.ctx.transform(scale, 0, 0, scale, 0, 0);
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cb();
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this.ctx.restore();
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}
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drawWithAlpha(alpha, cb) {
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this.ctx.save();
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this.ctx.globalAlpha = Math.min(Math.max(alpha, 0), 1);
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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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drawImageWithOutline(img, at, w, h, style) {
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this.ctx.save();
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const s = (typeof w === "number" || !w ? style?.weight : w.weight) || 1;
|
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this.ctx.shadowColor = (typeof w === "number" || !w ? style?.color || style?.fillColor : w.color || w.strokeColor) || "red";
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this.ctx.shadowBlur = 0;
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for(let x = -s; x <= s; x++){
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for(let y = -s; y <= s; y++){
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this.ctx.shadowOffsetX = x;
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this.ctx.shadowOffsetY = y;
|
|
typeof w === "number" && h ? this.ctx.drawImage(img, at.x, at.y, w, h) : this.ctx.drawImage(img, at.x, at.y);
|
|
}
|
|
}
|
|
this.ctx.restore();
|
|
}
|
|
drawSprite(img, spritePos, sWidth, sHeight, at, width, height) {
|
|
this.ctx.drawImage(img, spritePos.x, spritePos.y, sWidth, sHeight, at.x, at.y, width, height);
|
|
}
|
|
deferredDrawings = [];
|
|
deferDrawing(cb) {
|
|
this.deferredDrawings.push(cb);
|
|
}
|
|
drawDeferred() {
|
|
while(this.deferredDrawings.length){
|
|
this.deferredDrawings.pop()?.();
|
|
}
|
|
}
|
|
setStyle(style) {
|
|
const ctx = this.ctx;
|
|
ctx.fillStyle = style?.color || style?.fillColor || "black";
|
|
ctx.strokeStyle = style?.color || style?.strokeColor || "black";
|
|
ctx.lineWidth = style?.weight || 1;
|
|
ctx.textAlign = style?.textAlign || ctx.textAlign;
|
|
ctx.textBaseline = style?.textBaseline || ctx.textBaseline;
|
|
}
|
|
fillText(text, pos, maxWidth, style) {
|
|
this.setStyle(style);
|
|
this.ctx.fillText(text, pos.x, pos.y, maxWidth);
|
|
}
|
|
strokeText(text, pos, maxWidth, style) {
|
|
this.setStyle(style);
|
|
this.ctx.strokeText(text, pos.x, pos.y, maxWidth);
|
|
}
|
|
clearRect(at, width, height) {
|
|
this.ctx.clearRect(at.x, at.y, width, height);
|
|
}
|
|
mouseX = 0;
|
|
mouseY = 0;
|
|
registerDraggable(point, radius, style) {
|
|
if (this.draggables.find((d)=>d.point === point)) return;
|
|
const id = this.addUIElement("circle", point, radius, {
|
|
fillColor: "#5533ff50",
|
|
strokeColor: "#5533ff50"
|
|
});
|
|
this.draggables.push({
|
|
point,
|
|
radius,
|
|
style,
|
|
id
|
|
});
|
|
}
|
|
unregisterDraggable(point) {
|
|
for (const d of this.draggables){
|
|
if (d.point === point) {
|
|
this.removeUIElement(d.id);
|
|
}
|
|
}
|
|
this.draggables = this.draggables.filter((d)=>d.point !== point);
|
|
}
|
|
registerClickable(p1, p2, cb) {
|
|
const top = Math.min(p1.y, p2.y);
|
|
const left = Math.min(p1.x, p2.x);
|
|
const bottom = Math.max(p1.y, p2.y);
|
|
const right = Math.max(p1.x, p2.x);
|
|
this.clickables.push({
|
|
onClick: cb,
|
|
checkBound: (p)=>p.y >= top && p.x >= left && p.y <= bottom && p.x <= right
|
|
});
|
|
}
|
|
unregisterClickable(cb) {
|
|
this.clickables = this.clickables.filter((c)=>c.onClick !== cb);
|
|
}
|
|
addDragEvents({ onDragEnd, onDragStart, onDrag, point }) {
|
|
const d = this.draggables.find((d)=>d.point === point);
|
|
if (d) {
|
|
d.onDragEnd = onDragEnd;
|
|
d.onDragStart = onDragStart;
|
|
d.onDrag = onDrag;
|
|
}
|
|
}
|
|
onClick(e) {
|
|
const mouse = new Vector(this.mouseX, this.mouseY);
|
|
for (const d of this.draggables){
|
|
if (d.point.dist(mouse) <= d.radius) {
|
|
d.beingDragged = true;
|
|
d.onDragStart?.call(null);
|
|
this.dragTarget = d;
|
|
} else d.beingDragged = false;
|
|
}
|
|
for (const c of this.clickables){
|
|
if (c.checkBound(mouse)) {
|
|
c.onClick();
|
|
}
|
|
}
|
|
}
|
|
offClick(e) {
|
|
for (const d of this.draggables){
|
|
d.beingDragged = false;
|
|
d.onDragEnd?.call(null);
|
|
}
|
|
this.dragTarget = undefined;
|
|
}
|
|
onDrag(e) {
|
|
this._canvas.getBoundingClientRect();
|
|
this.mouseX = e.offsetX;
|
|
this.mouseY = e.offsetY;
|
|
for (const d of this.draggables.filter((d)=>d.beingDragged)){
|
|
d.point.add(e.movementX, e.movementY);
|
|
d.onDrag && d.onDrag({
|
|
x: e.movementX,
|
|
y: e.movementY
|
|
});
|
|
}
|
|
}
|
|
uiElements = new Map();
|
|
uiDrawing = {
|
|
rectangle: (...args)=>{
|
|
!args[3].noFill && this.fillRect(args[0], args[1], args[2], args[3]);
|
|
!args[3].noStroke && this.drawRect(args[0], args[1], args[2], args[3]);
|
|
},
|
|
square: (...args)=>{
|
|
!args[2].noFill && this.fillSquare(args[0], args[1], args[2]);
|
|
!args[2].noStroke && this.drawSquare(args[0], args[1], args[2]);
|
|
},
|
|
circle: (...args)=>{
|
|
!args[2].noFill && this.fillCircle(args[0], args[1], args[2]);
|
|
!args[2].noStroke && this.drawCircle(args[0], args[1], args[2]);
|
|
}
|
|
};
|
|
drawUI() {
|
|
for (const [shape, ...args] of this.uiElements.values()){
|
|
this.uiDrawing[shape].apply(null, args);
|
|
}
|
|
}
|
|
addUIElement(shape, ...args) {
|
|
const id = crypto.randomUUID();
|
|
for (const arg of args){
|
|
delete arg.color;
|
|
}
|
|
this.uiElements.set(id, [
|
|
shape,
|
|
...args
|
|
]);
|
|
return id;
|
|
}
|
|
removeUIElement(id) {
|
|
this.uiElements.delete(id);
|
|
}
|
|
}
|
|
class ZoomableDoodler extends Doodler {
|
|
scale = 1;
|
|
dragging = false;
|
|
origin = {
|
|
x: 0,
|
|
y: 0
|
|
};
|
|
mouse = {
|
|
x: 0,
|
|
y: 0
|
|
};
|
|
previousTouchLength;
|
|
touchTimer;
|
|
hasDoubleTapped = false;
|
|
zooming = false;
|
|
scaleAround = {
|
|
x: 0,
|
|
y: 0
|
|
};
|
|
maxScale = 4;
|
|
constructor(options, postInit){
|
|
super(options, postInit);
|
|
this._canvas.addEventListener("wheel", (e)=>{
|
|
this.scaleAtMouse(e.deltaY < 0 ? 1.1 : .9);
|
|
if (this.scale === 1) {
|
|
this.origin.x = 0;
|
|
this.origin.y = 0;
|
|
}
|
|
});
|
|
this._canvas.addEventListener("dblclick", (e)=>{
|
|
e.preventDefault();
|
|
this.scale = 1;
|
|
this.origin.x = 0;
|
|
this.origin.y = 0;
|
|
this.ctx.setTransform(1, 0, 0, 1, 0, 0);
|
|
});
|
|
this._canvas.addEventListener("mousedown", (e)=>{
|
|
e.preventDefault();
|
|
this.dragging = true;
|
|
});
|
|
this._canvas.addEventListener("mouseup", (e)=>{
|
|
e.preventDefault();
|
|
this.dragging = false;
|
|
});
|
|
this._canvas.addEventListener("mouseleave", (_e)=>{
|
|
this.dragging = false;
|
|
});
|
|
this._canvas.addEventListener("mousemove", (e)=>{
|
|
const prev = this.mouse;
|
|
this.mouse = {
|
|
x: e.offsetX,
|
|
y: e.offsetY
|
|
};
|
|
if (this.dragging && !this.dragTarget) this.drag(prev);
|
|
});
|
|
this._canvas.addEventListener("touchstart", (e)=>{
|
|
e.preventDefault();
|
|
if (e.touches.length === 1) {
|
|
const t1 = e.touches.item(0);
|
|
if (t1) {
|
|
this.mouse = this.getTouchOffset({
|
|
x: t1.clientX,
|
|
y: t1.clientY
|
|
});
|
|
}
|
|
} else {
|
|
clearTimeout(this.touchTimer);
|
|
}
|
|
});
|
|
this._canvas.addEventListener("touchend", (e)=>{
|
|
if (e.touches.length !== 2) {
|
|
this.previousTouchLength = undefined;
|
|
}
|
|
switch(e.touches.length){
|
|
case 1:
|
|
break;
|
|
case 0:
|
|
if (!this.zooming) {
|
|
this.events.get("touchend")?.map((cb)=>cb(e));
|
|
}
|
|
break;
|
|
}
|
|
this.dragging = e.touches.length === 1;
|
|
clearTimeout(this.touchTimer);
|
|
});
|
|
this._canvas.addEventListener("touchmove", (e)=>{
|
|
e.preventDefault();
|
|
if (e.touches.length === 2) {
|
|
const t1 = e.touches.item(0);
|
|
const t2 = e.touches.item(1);
|
|
if (t1 && t2) {
|
|
const vect = OriginVector.from(this.getTouchOffset({
|
|
x: t1.clientX,
|
|
y: t1.clientY
|
|
}), {
|
|
x: t2.clientX,
|
|
y: t2.clientY
|
|
});
|
|
if (this.previousTouchLength) {
|
|
const diff = this.previousTouchLength - vect.mag();
|
|
this.scaleAt(vect.halfwayPoint, diff < 0 ? 1.01 : .99);
|
|
this.scaleAround = {
|
|
...vect.halfwayPoint
|
|
};
|
|
}
|
|
this.previousTouchLength = vect.mag();
|
|
}
|
|
}
|
|
if (e.touches.length === 1) {
|
|
this.dragging === true;
|
|
const t1 = e.touches.item(0);
|
|
if (t1) {
|
|
const prev = this.mouse;
|
|
this.mouse = this.getTouchOffset({
|
|
x: t1.clientX,
|
|
y: t1.clientY
|
|
});
|
|
this.drag(prev);
|
|
}
|
|
}
|
|
});
|
|
this._canvas.addEventListener("touchstart", (e)=>{
|
|
if (e.touches.length !== 1) return false;
|
|
if (!this.hasDoubleTapped) {
|
|
this.hasDoubleTapped = true;
|
|
setTimeout(()=>this.hasDoubleTapped = false, 300);
|
|
return false;
|
|
}
|
|
console.log(this.mouse);
|
|
if (this.scale > 1) {
|
|
this.frameCounter = map(this.scale, this.maxScale, 1, 0, 59);
|
|
this.zoomDirection = -1;
|
|
} else {
|
|
this.frameCounter = 0;
|
|
this.zoomDirection = 1;
|
|
}
|
|
if (this.zoomDirection > 0) {
|
|
this.scaleAround = {
|
|
...this.mouse
|
|
};
|
|
}
|
|
this.events.get("doubletap")?.map((cb)=>cb(e));
|
|
});
|
|
}
|
|
worldToScreen(x, y) {
|
|
x = x * this.scale + this.origin.x;
|
|
y = y * this.scale + this.origin.y;
|
|
return {
|
|
x,
|
|
y
|
|
};
|
|
}
|
|
screenToWorld(x, y) {
|
|
x = (x - this.origin.x) / this.scale;
|
|
y = (y - this.origin.y) / this.scale;
|
|
return {
|
|
x,
|
|
y
|
|
};
|
|
}
|
|
scaleAtMouse(scaleBy) {
|
|
if (this.scale === this.maxScale && scaleBy > 1) return;
|
|
this.scaleAt({
|
|
x: this.mouse.x,
|
|
y: this.mouse.y
|
|
}, scaleBy);
|
|
}
|
|
scaleAt(p, scaleBy) {
|
|
this.scale = Math.min(Math.max(this.scale * scaleBy, 1), this.maxScale);
|
|
this.origin.x = p.x - (p.x - this.origin.x) * scaleBy;
|
|
this.origin.y = p.y - (p.y - this.origin.y) * scaleBy;
|
|
this.constrainOrigin();
|
|
}
|
|
moveOrigin(motion) {
|
|
if (this.scale > 1) {
|
|
this.origin.x += motion.x;
|
|
this.origin.y += motion.y;
|
|
this.constrainOrigin();
|
|
}
|
|
}
|
|
drag(prev) {
|
|
if (this.scale > 1) {
|
|
const xOffset = this.mouse.x - prev.x;
|
|
const yOffset = this.mouse.y - prev.y;
|
|
this.origin.x += xOffset;
|
|
this.origin.y += yOffset;
|
|
this.constrainOrigin();
|
|
}
|
|
}
|
|
constrainOrigin() {
|
|
this.origin.x = Math.min(Math.max(this.origin.x, -this._canvas.width * this.scale + this._canvas.width), 0);
|
|
this.origin.y = Math.min(Math.max(this.origin.y, -this._canvas.height * this.scale + this._canvas.height), 0);
|
|
}
|
|
draw() {
|
|
this.ctx.setTransform(this.scale, 0, 0, this.scale, this.origin.x, this.origin.y);
|
|
this.animateZoom();
|
|
this.ctx.fillStyle = this.bg;
|
|
this.ctx.fillRect(0, 0, this.width / this.scale, this.height / this.scale);
|
|
super.draw();
|
|
}
|
|
getTouchOffset(p) {
|
|
const { x, y } = this._canvas.getBoundingClientRect();
|
|
const offsetX = p.x - x;
|
|
const offsetY = p.y - y;
|
|
return {
|
|
x: offsetX,
|
|
y: offsetY
|
|
};
|
|
}
|
|
onDrag(e) {
|
|
const d = {
|
|
...e,
|
|
movementX: e.movementX / this.scale,
|
|
movementY: e.movementY / this.scale
|
|
};
|
|
super.onDrag(d);
|
|
const { x, y } = this.screenToWorld(e.offsetX, e.offsetY);
|
|
this.mouseX = x;
|
|
this.mouseY = y;
|
|
}
|
|
zoomDirection = -1;
|
|
frameCounter = 60;
|
|
animateZoom() {
|
|
if (this.frameCounter < 60) {
|
|
const frame = easeInOut(map(this.frameCounter, 0, 59, 0, 1));
|
|
switch(this.zoomDirection){
|
|
case 1:
|
|
{
|
|
this.scale = map(frame, 0, 1, 1, this.maxScale);
|
|
}
|
|
break;
|
|
case -1:
|
|
{
|
|
this.scale = map(frame, 0, 1, this.maxScale, 1);
|
|
}
|
|
break;
|
|
}
|
|
this.origin.x = this.scaleAround.x - this.scaleAround.x * this.scale;
|
|
this.origin.y = this.scaleAround.y - this.scaleAround.y * this.scale;
|
|
this.constrainOrigin();
|
|
this.frameCounter++;
|
|
}
|
|
}
|
|
events = new Map();
|
|
registerEvent(eventName, cb) {
|
|
let events = this.events.get(eventName);
|
|
if (!events) events = this.events.set(eventName, []).get(eventName);
|
|
events.push(cb);
|
|
}
|
|
}
|
|
const init = (opt, zoomable, postInit)=>{
|
|
if (window.doodler) {
|
|
throw "Doodler has already been initialized in this window";
|
|
}
|
|
window.doodler = zoomable ? new ZoomableDoodler(opt, postInit) : new Doodler(opt, postInit);
|
|
window.doodler.init();
|
|
};
|
|
class Polygon {
|
|
points;
|
|
center;
|
|
constructor(points){
|
|
this.points = points.map((p)=>new Vector(p));
|
|
this.center = this.calcCenter();
|
|
}
|
|
draw(color) {
|
|
for(let i = 0; i < this.points.length; i++){
|
|
const p1 = this.points[i];
|
|
const p2 = this.points.at(i - this.points.length + 1);
|
|
doodler.line(p1.copy().add(this.center), p2.copy().add(this.center), {
|
|
color
|
|
});
|
|
}
|
|
}
|
|
calcCenter() {
|
|
if (!this.points.length) return new Vector();
|
|
const center = new Vector();
|
|
for (const point of this.points){
|
|
center.add(point);
|
|
}
|
|
center.div(this.points.length);
|
|
return center;
|
|
}
|
|
get circularHitbox() {
|
|
let greatestDistance = 0;
|
|
for (const p of this.points){
|
|
greatestDistance = Math.max(p.copy().add(this.center).dist(this.center), greatestDistance);
|
|
}
|
|
return {
|
|
center: this.center.copy(),
|
|
radius: greatestDistance
|
|
};
|
|
}
|
|
_aabb;
|
|
get AABB() {
|
|
if (!this._aabb) {
|
|
this._aabb = this.recalculateAABB();
|
|
}
|
|
return this._aabb;
|
|
}
|
|
recalculateAABB() {
|
|
let smallestX, biggestX, smallestY, biggestY;
|
|
smallestX = smallestY = Infinity;
|
|
biggestX = biggestY = -Infinity;
|
|
for (const p of this.points){
|
|
const temp = p.copy().add(this.center);
|
|
smallestX = Math.min(temp.x, smallestX);
|
|
biggestX = Math.max(temp.x, biggestX);
|
|
smallestY = Math.min(temp.y, smallestY);
|
|
biggestY = Math.max(temp.y, biggestY);
|
|
}
|
|
return {
|
|
x: smallestX,
|
|
y: smallestY,
|
|
w: biggestX - smallestX,
|
|
h: biggestY - smallestY
|
|
};
|
|
}
|
|
static createPolygon(sides = 3, radius = 100) {
|
|
sides = Math.round(sides);
|
|
if (sides < 3) {
|
|
throw "You need at least 3 sides for a polygon";
|
|
}
|
|
const poly = new Polygon([]);
|
|
const rotangle = Math.PI * 2 / sides;
|
|
let angle = 0;
|
|
for(let i = 0; i < sides; i++){
|
|
angle = i * rotangle + (Math.PI - rotangle) * 0.5;
|
|
const pt = new Vector(Math.cos(angle) * radius, Math.sin(angle) * radius);
|
|
poly.points.push(pt);
|
|
}
|
|
poly.center = poly.calcCenter();
|
|
return poly;
|
|
}
|
|
getEdges() {
|
|
const edges = [];
|
|
for(let i = 0; i < this.points.length; i++){
|
|
const nextIndex = (i + 1) % this.points.length;
|
|
const edge = this.points[nextIndex].copy().add(this.center).sub(this.points[i].copy().add(this.center));
|
|
edges.push(edge);
|
|
}
|
|
return edges;
|
|
}
|
|
getNearestPoint(p) {
|
|
let nearest = this.points[0];
|
|
for (const point of this.points){
|
|
if (p.dist(point) < p.dist(nearest)) nearest = point;
|
|
}
|
|
return nearest;
|
|
}
|
|
}
|
|
class SplineSegment {
|
|
points;
|
|
length;
|
|
constructor(points){
|
|
this.points = points;
|
|
this.length = this.calculateApproxLength(100);
|
|
}
|
|
draw(color) {
|
|
const [a, b, c, d] = this.points;
|
|
doodler.drawBezier(a, b, c, d, {
|
|
strokeColor: color || "#ffffff50"
|
|
});
|
|
}
|
|
getPointAtT(t) {
|
|
const [a, b, c, d] = this.points;
|
|
const res = a.copy();
|
|
res.add(Vector.add(a.copy().mult(-3), b.copy().mult(3)).mult(t));
|
|
res.add(Vector.add(Vector.add(a.copy().mult(3), b.copy().mult(-6)), c.copy().mult(3)).mult(Math.pow(t, 2)));
|
|
res.add(Vector.add(Vector.add(a.copy().mult(-1), b.copy().mult(3)), Vector.add(c.copy().mult(-3), d.copy())).mult(Math.pow(t, 3)));
|
|
return res;
|
|
}
|
|
getClosestPoint(v) {
|
|
const resolution = 1 / 25;
|
|
let closest = this.points[0];
|
|
let closestDistance = this.points[0].dist(v);
|
|
let closestT = 0;
|
|
for(let i = 0; i < 25; i++){
|
|
const point = this.getPointAtT(i * resolution);
|
|
const distance = v.dist(point);
|
|
if (distance < closestDistance) {
|
|
closest = point;
|
|
closestDistance = distance;
|
|
closestT = i * resolution;
|
|
}
|
|
}
|
|
return [
|
|
closest,
|
|
closestDistance,
|
|
closestT
|
|
];
|
|
}
|
|
getPointsWithinRadius(v, r) {
|
|
const points = [];
|
|
const resolution = 1 / 25;
|
|
for(let i = 0; i < 25 + 1; i++){
|
|
const point = this.getPointAtT(i * resolution);
|
|
const distance = v.dist(point);
|
|
if (distance < r) {
|
|
points.push([
|
|
i * resolution,
|
|
this
|
|
]);
|
|
}
|
|
}
|
|
return points;
|
|
}
|
|
tangent(t) {
|
|
const [a, b, c, d] = this.points;
|
|
const res = Vector.sub(b, a).mult(3 * Math.pow(1 - t, 2));
|
|
res.add(Vector.add(Vector.sub(c, b).mult(6 * (1 - t) * t), Vector.sub(d, c).mult(3 * Math.pow(t, 2))));
|
|
return res;
|
|
}
|
|
doesIntersectCircle(x, y, r) {
|
|
const v = new Vector(x, y);
|
|
const resolution = 1 / 25;
|
|
let distance = Infinity;
|
|
let t;
|
|
for(let i = 0; i < 25 - 1; i++){
|
|
const a = this.getPointAtT(i * resolution);
|
|
const b = this.getPointAtT((i + 1) * resolution);
|
|
const ac = Vector.sub(v, a);
|
|
const ab = Vector.sub(b, a);
|
|
const d = Vector.add(Vector.vectorProjection(ac, ab), a);
|
|
const ad = Vector.sub(d, a);
|
|
const k = Math.abs(ab.x) > Math.abs(ab.y) ? ad.x / ab.x : ad.y / ab.y;
|
|
let dist;
|
|
if (k <= 0.0) {
|
|
dist = Vector.hypot2(v, a);
|
|
} else if (k >= 1.0) {
|
|
dist = Vector.hypot2(v, b);
|
|
}
|
|
dist = Vector.hypot2(v, d);
|
|
if (dist < distance) {
|
|
distance = dist;
|
|
t = i * resolution;
|
|
}
|
|
}
|
|
if (distance < r) return t;
|
|
return false;
|
|
}
|
|
intersectsCircle(circleCenter, radius) {
|
|
for(let i = 0; i < 100; i++){
|
|
const t1 = i / 100;
|
|
const t2 = (i + 1) / 100;
|
|
const segmentStart = this.getPointAtT(t1);
|
|
const segmentEnd = this.getPointAtT(t2);
|
|
const segmentLength = Math.sqrt((segmentEnd.x - segmentStart.x) ** 2 + (segmentEnd.y - segmentStart.y) ** 2);
|
|
const resolution = Math.max(10, Math.ceil(100 * (segmentLength / radius)));
|
|
for(let j = 0; j <= resolution; j++){
|
|
const t = j / resolution;
|
|
const point = this.getPointAtT(t);
|
|
const distance = Math.sqrt((point.x - circleCenter.x) ** 2 + (point.y - circleCenter.y) ** 2);
|
|
if (distance <= radius) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
calculateApproxLength(resolution = 25) {
|
|
const stepSize = 1 / resolution;
|
|
const points = [];
|
|
for(let i = 0; i <= resolution; i++){
|
|
const current = stepSize * i;
|
|
points.push(this.getPointAtT(current));
|
|
}
|
|
this.length = points.reduce((acc, cur)=>{
|
|
const prev = acc.prev;
|
|
acc.prev = cur;
|
|
if (!prev) return acc;
|
|
acc.length += cur.dist(prev);
|
|
return acc;
|
|
}, {
|
|
prev: undefined,
|
|
length: 0
|
|
}).length;
|
|
return this.length;
|
|
}
|
|
calculateEvenlySpacedPoints(spacing, resolution = 1) {
|
|
const points = [];
|
|
points.push(this.points[0]);
|
|
let prev = points[0];
|
|
let distSinceLastEvenPoint = 0;
|
|
let t = 0;
|
|
const div = Math.ceil(this.length * resolution * 10);
|
|
while(t < 1){
|
|
t += 1 / div;
|
|
const point = this.getPointAtT(t);
|
|
distSinceLastEvenPoint += prev.dist(point);
|
|
if (distSinceLastEvenPoint >= spacing) {
|
|
const overshoot = distSinceLastEvenPoint - spacing;
|
|
const evenPoint = Vector.add(point, Vector.sub(point, prev).normalize().mult(overshoot));
|
|
distSinceLastEvenPoint = overshoot;
|
|
points.push(evenPoint);
|
|
prev = evenPoint;
|
|
}
|
|
prev = point;
|
|
}
|
|
return points;
|
|
}
|
|
_aabb;
|
|
get AABB() {
|
|
if (!this._aabb) {
|
|
this._aabb = this.recalculateAABB();
|
|
}
|
|
return this._aabb;
|
|
}
|
|
recalculateAABB() {
|
|
let minX = Infinity;
|
|
let minY = Infinity;
|
|
let maxX = -Infinity;
|
|
let maxY = -Infinity;
|
|
for(let i = 0; i < 100; i++){
|
|
const t = i / 100;
|
|
const point = this.getPointAtT(t);
|
|
minX = Math.min(minX, point.x);
|
|
minY = Math.min(minY, point.y);
|
|
maxX = Math.max(maxX, point.x);
|
|
maxY = Math.max(maxY, point.y);
|
|
}
|
|
return {
|
|
x: minX,
|
|
y: minY,
|
|
w: maxX - minX,
|
|
h: maxY - minY
|
|
};
|
|
}
|
|
}
|
|
init({
|
|
width: 2400,
|
|
height: 1200,
|
|
bg: "#333"
|
|
}, true, (ctx)=>{
|
|
ctx.imageSmoothingEnabled = false;
|
|
});
|
|
const img = new Image();
|
|
img.src = "./skeleton.png";
|
|
img.hidden;
|
|
document.body.append(img);
|
|
const p = new Vector(500, 500);
|
|
const spline = new SplineSegment([
|
|
new Vector({
|
|
x: -25,
|
|
y: -25
|
|
}).mult(10).add(p),
|
|
new Vector({
|
|
x: 25,
|
|
y: -25
|
|
}).mult(10).add(p),
|
|
new Vector({
|
|
x: -25,
|
|
y: -25
|
|
}).mult(10).add(p),
|
|
new Vector({
|
|
x: -25,
|
|
y: 25
|
|
}).mult(10).add(p)
|
|
]);
|
|
const poly2 = Polygon.createPolygon(4);
|
|
poly2.center = p.copy().add(100, 100);
|
|
doodler.createLayer((c)=>{
|
|
for(let i = 0; i < c.canvas.width; i += 50){
|
|
for(let j = 0; j < c.canvas.height; j += 50){
|
|
doodler.drawSquare(new Vector(i, j), 50, {
|
|
color: "#00000010"
|
|
});
|
|
}
|
|
}
|
|
poly2.circularHitbox;
|
|
const intersects = satCollisionSpline(poly2, spline);
|
|
const color = intersects ? "red" : "aqua";
|
|
spline.draw(color);
|
|
poly2.draw(color);
|
|
const [gamepad] = navigator.getGamepads();
|
|
if (gamepad) {
|
|
gamepad.axes[0];
|
|
gamepad.axes[1];
|
|
const rightX = gamepad.axes[2];
|
|
const rightY = gamepad.axes[3];
|
|
let mMulti = 10;
|
|
const mod = new Vector(Math.min(Math.max(rightX - 0.05, 0), rightX + 0.05), Math.min(Math.max(rightY - 0.05, 0), rightY + 0.05));
|
|
poly2.center.add(mod.mult(mMulti));
|
|
}
|
|
});
|