808 lines
24 KiB
JavaScript
808 lines
24 KiB
JavaScript
// deno-fmt-ignore-file
|
|
// deno-lint-ignore-file
|
|
// This code was bundled using `deno bundle` and it's not recommended to edit it manually
|
|
|
|
const Constants = {
|
|
TWO_PI: Math.PI * 2
|
|
};
|
|
class Vector {
|
|
x;
|
|
y;
|
|
z;
|
|
constructor(x = 0, y = 0, z = 0){
|
|
this.x = x;
|
|
this.y = y;
|
|
this.z = z;
|
|
}
|
|
set(v, y, z) {
|
|
if (arguments.length === 1 && typeof v !== "number") {
|
|
this.set(v.x || v[0] || 0, v.y || v[1] || 0, v.z || v[2] || 0);
|
|
} else {
|
|
this.x = v;
|
|
this.y = y || 0;
|
|
this.z = z || 0;
|
|
}
|
|
}
|
|
get() {
|
|
return new Vector(this.x, this.y, this.z);
|
|
}
|
|
mag() {
|
|
const x = this.x, y = this.y, z = this.z;
|
|
return Math.sqrt(x * x + y * y + z * z);
|
|
}
|
|
magSq() {
|
|
const x = this.x, y = this.y, z = this.z;
|
|
return x * x + y * y + z * z;
|
|
}
|
|
setMag(v_or_len, len) {
|
|
if (len === undefined) {
|
|
len = v_or_len;
|
|
this.normalize();
|
|
this.mult(len);
|
|
} else {
|
|
const v = v_or_len;
|
|
v.normalize();
|
|
v.mult(len);
|
|
return v;
|
|
}
|
|
}
|
|
add(v, y, z) {
|
|
if (arguments.length === 1 && typeof v !== 'number') {
|
|
this.x += v.x;
|
|
this.y += v.y;
|
|
this.z += v.z;
|
|
} else if (arguments.length === 2) {
|
|
this.x += v;
|
|
this.y += y ?? 0;
|
|
} else {
|
|
this.x += v;
|
|
this.y += y ?? 0;
|
|
this.z += z ?? 0;
|
|
}
|
|
return this;
|
|
}
|
|
sub(v, y, z) {
|
|
if (arguments.length === 1 && typeof v !== 'number') {
|
|
this.x -= v.x;
|
|
this.y -= v.y;
|
|
this.z -= v.z;
|
|
} else if (arguments.length === 2) {
|
|
this.x -= v;
|
|
this.y -= y ?? 0;
|
|
} else {
|
|
this.x -= v;
|
|
this.y -= y ?? 0;
|
|
this.z -= z ?? 0;
|
|
}
|
|
return this;
|
|
}
|
|
mult(v) {
|
|
if (typeof v === 'number') {
|
|
this.x *= v;
|
|
this.y *= v;
|
|
this.z *= v;
|
|
} else {
|
|
this.x *= v.x;
|
|
this.y *= v.y;
|
|
this.z *= v.z;
|
|
}
|
|
return this;
|
|
}
|
|
div(v) {
|
|
if (typeof v === 'number') {
|
|
this.x /= v;
|
|
this.y /= v;
|
|
this.z /= v;
|
|
} else {
|
|
this.x /= v.x;
|
|
this.y /= v.y;
|
|
this.z /= v.z;
|
|
}
|
|
return this;
|
|
}
|
|
rotate(angle) {
|
|
const prev_x = this.x;
|
|
const c = Math.cos(angle);
|
|
const s = Math.sin(angle);
|
|
this.x = c * this.x - s * this.y;
|
|
this.y = s * prev_x + c * this.y;
|
|
return this;
|
|
}
|
|
dist(v) {
|
|
const dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;
|
|
return Math.sqrt(dx * dx + dy * dy + dz * dz);
|
|
}
|
|
dot(v, y, z) {
|
|
if (arguments.length === 1 && typeof v !== 'number') {
|
|
return this.x * v.x + this.y * v.y + this.z * v.z;
|
|
}
|
|
return this.x * v + this.y * y + this.z * z;
|
|
}
|
|
cross(v) {
|
|
const x = this.x, y = this.y, z = this.z;
|
|
return new Vector(y * v.z - v.y * z, z * v.x - v.z * x, x * v.y - v.x * y);
|
|
}
|
|
lerp(v_or_x, amt_or_y, z, amt) {
|
|
const lerp_val = (start, stop, amt)=>{
|
|
return start + (stop - start) * amt;
|
|
};
|
|
let x, y;
|
|
if (arguments.length === 2 && typeof v_or_x !== 'number') {
|
|
amt = amt_or_y;
|
|
x = v_or_x.x;
|
|
y = v_or_x.y;
|
|
z = v_or_x.z;
|
|
} else {
|
|
x = v_or_x;
|
|
y = amt_or_y;
|
|
}
|
|
this.x = lerp_val(this.x, x, amt);
|
|
this.y = lerp_val(this.y, y, amt);
|
|
this.z = lerp_val(this.z, z, amt);
|
|
return this;
|
|
}
|
|
normalize() {
|
|
const m = this.mag();
|
|
if (m > 0) {
|
|
this.div(m);
|
|
}
|
|
return this;
|
|
}
|
|
limit(high) {
|
|
if (this.mag() > high) {
|
|
this.normalize();
|
|
this.mult(high);
|
|
}
|
|
return this;
|
|
}
|
|
heading() {
|
|
return -Math.atan2(-this.y, this.x);
|
|
}
|
|
heading2D() {
|
|
return this.heading();
|
|
}
|
|
toString() {
|
|
return "[" + this.x + ", " + this.y + ", " + this.z + "]";
|
|
}
|
|
array() {
|
|
return [
|
|
this.x,
|
|
this.y,
|
|
this.z
|
|
];
|
|
}
|
|
copy() {
|
|
return new Vector(this.x, this.y, this.z);
|
|
}
|
|
drawDot() {
|
|
if (!doodler) return;
|
|
doodler.dot(this, {
|
|
weight: 2,
|
|
color: 'red'
|
|
});
|
|
}
|
|
static fromAngle(angle, v) {
|
|
if (v === undefined || v === null) {
|
|
v = new Vector();
|
|
}
|
|
v.x = Math.cos(angle);
|
|
v.y = Math.sin(angle);
|
|
return v;
|
|
}
|
|
static random2D(v) {
|
|
return Vector.fromAngle(Math.random() * (Math.PI * 2), v);
|
|
}
|
|
static random3D(v) {
|
|
const angle = Math.random() * Constants.TWO_PI;
|
|
const vz = Math.random() * 2 - 1;
|
|
const mult = Math.sqrt(1 - vz * vz);
|
|
const vx = mult * Math.cos(angle);
|
|
const vy = mult * Math.sin(angle);
|
|
if (v === undefined || v === null) {
|
|
v = new Vector(vx, vy, vz);
|
|
} else {
|
|
v.set(vx, vy, vz);
|
|
}
|
|
return v;
|
|
}
|
|
static dist(v1, v2) {
|
|
return v1.dist(v2);
|
|
}
|
|
static dot(v1, v2) {
|
|
return v1.dot(v2);
|
|
}
|
|
static cross(v1, v2) {
|
|
return v1.cross(v2);
|
|
}
|
|
static add(v1, v2) {
|
|
return new Vector(v1.x + v2.x, v1.y + v2.y, v1.z + v2.z);
|
|
}
|
|
static sub(v1, v2) {
|
|
return new Vector(v1.x - v2.x, v1.y - v2.y, v1.z - v2.z);
|
|
}
|
|
static angleBetween(v1, v2) {
|
|
return Math.acos(v1.dot(v2) / Math.sqrt(v1.magSq() * v2.magSq()));
|
|
}
|
|
static lerp(v1, v2, amt) {
|
|
const retval = new Vector(v1.x, v1.y, v1.z);
|
|
retval.lerp(v2, amt);
|
|
return retval;
|
|
}
|
|
static vectorProjection(v1, v2) {
|
|
v2 = v2.copy();
|
|
v2.normalize();
|
|
const sp = v1.dot(v2);
|
|
v2.mult(sp);
|
|
return v2;
|
|
}
|
|
static hypot2(a, b) {
|
|
return Vector.dot(Vector.sub(a, b), Vector.sub(a, b));
|
|
}
|
|
}
|
|
class OriginVector extends Vector {
|
|
origin;
|
|
get halfwayPoint() {
|
|
return {
|
|
x: this.mag() / 2 * Math.sin(this.heading()) + this.origin.x,
|
|
y: this.mag() / 2 * Math.cos(this.heading()) + this.origin.y
|
|
};
|
|
}
|
|
constructor(origin, p){
|
|
super(p.x, p.y, p.z);
|
|
this.origin = origin;
|
|
}
|
|
static from(origin, p) {
|
|
const v = {
|
|
x: p.x - origin.x,
|
|
y: p.y - origin.y
|
|
};
|
|
return new OriginVector(origin, v);
|
|
}
|
|
}
|
|
const easeInOut = (x)=>x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
|
|
const map = (value, x1, y1, x2, y2)=>(value - x1) * (y2 - x2) / (y1 - x1) + x2;
|
|
class Doodler {
|
|
ctx;
|
|
_canvas;
|
|
layers = [];
|
|
bg;
|
|
framerate;
|
|
get width() {
|
|
return this.ctx.canvas.width;
|
|
}
|
|
get height() {
|
|
return this.ctx.canvas.height;
|
|
}
|
|
draggables = [];
|
|
clickables = [];
|
|
dragTarget;
|
|
constructor({ width , height , canvas , bg , framerate }){
|
|
if (!canvas) {
|
|
canvas = document.createElement('canvas');
|
|
document.body.append(canvas);
|
|
}
|
|
this.bg = bg || 'white';
|
|
this.framerate = framerate || 60;
|
|
canvas.width = width;
|
|
canvas.height = height;
|
|
this._canvas = canvas;
|
|
const ctx = canvas.getContext('2d');
|
|
if (!ctx) throw 'Unable to initialize Doodler: Canvas context not found';
|
|
this.ctx = ctx;
|
|
}
|
|
init() {
|
|
this._canvas.addEventListener('mousedown', (e)=>this.onClick(e));
|
|
this._canvas.addEventListener('mouseup', (e)=>this.offClick(e));
|
|
this._canvas.addEventListener('mousemove', (e)=>this.onDrag(e));
|
|
this.startDrawLoop();
|
|
}
|
|
timer;
|
|
startDrawLoop() {
|
|
this.timer = setInterval(()=>this.draw(), 1000 / this.framerate);
|
|
}
|
|
draw() {
|
|
this.ctx.fillStyle = this.bg;
|
|
this.ctx.fillRect(0, 0, this.width, this.height);
|
|
for (const [i, l] of (this.layers || []).entries()){
|
|
l(this.ctx, i);
|
|
}
|
|
this.drawUI();
|
|
}
|
|
createLayer(layer) {
|
|
this.layers.push(layer);
|
|
}
|
|
deleteLayer(layer) {
|
|
this.layers = this.layers.filter((l)=>l !== layer);
|
|
}
|
|
moveLayer(layer, index) {
|
|
let temp = this.layers.filter((l)=>l !== layer);
|
|
temp = [
|
|
...temp.slice(0, index),
|
|
layer,
|
|
...temp.slice(index)
|
|
];
|
|
this.layers = temp;
|
|
}
|
|
line(start, end, style) {
|
|
this.setStyle(style);
|
|
this.ctx.beginPath();
|
|
this.ctx.moveTo(start.x, start.y);
|
|
this.ctx.lineTo(end.x, end.y);
|
|
this.ctx.stroke();
|
|
}
|
|
dot(at, style) {
|
|
this.setStyle({
|
|
...style,
|
|
weight: 1
|
|
});
|
|
this.ctx.beginPath();
|
|
this.ctx.arc(at.x, at.y, style?.weight || 1, 0, Constants.TWO_PI);
|
|
this.ctx.fill();
|
|
}
|
|
drawCircle(at, radius, style) {
|
|
this.setStyle(style);
|
|
this.ctx.beginPath();
|
|
this.ctx.arc(at.x, at.y, radius, 0, Constants.TWO_PI);
|
|
this.ctx.stroke();
|
|
}
|
|
fillCircle(at, radius, style) {
|
|
this.setStyle(style);
|
|
this.ctx.beginPath();
|
|
this.ctx.arc(at.x, at.y, radius, 0, Constants.TWO_PI);
|
|
this.ctx.fill();
|
|
}
|
|
drawRect(at, width, height, style) {
|
|
this.setStyle(style);
|
|
this.ctx.strokeRect(at.x, at.y, width, height);
|
|
}
|
|
fillRect(at, width, height, style) {
|
|
this.setStyle(style);
|
|
this.ctx.fillRect(at.x, at.y, width, height);
|
|
}
|
|
drawSquare(at, size, style) {
|
|
this.drawRect(at, size, size, style);
|
|
}
|
|
fillSquare(at, size, style) {
|
|
this.fillRect(at, size, size, style);
|
|
}
|
|
drawCenteredRect(at, width, height, style) {
|
|
this.ctx.save();
|
|
this.ctx.translate(-width / 2, -height / 2);
|
|
this.drawRect(at, width, height, style);
|
|
this.ctx.restore();
|
|
}
|
|
fillCenteredRect(at, width, height, style) {
|
|
this.ctx.save();
|
|
this.ctx.translate(-width / 2, -height / 2);
|
|
this.fillRect(at, width, height, style);
|
|
this.ctx.restore();
|
|
}
|
|
drawCenteredSquare(at, size, style) {
|
|
this.drawCenteredRect(at, size, size, style);
|
|
}
|
|
fillCenteredSquare(at, size, style) {
|
|
this.fillCenteredRect(at, size, size, style);
|
|
}
|
|
drawBezier(a, b, c, d, style) {
|
|
this.setStyle(style);
|
|
this.ctx.beginPath();
|
|
this.ctx.moveTo(a.x, a.y);
|
|
this.ctx.bezierCurveTo(b.x, b.y, c.x, c.y, d.x, d.y);
|
|
this.ctx.stroke();
|
|
}
|
|
drawRotated(origin, angle, cb) {
|
|
this.ctx.save();
|
|
this.ctx.translate(origin.x, origin.y);
|
|
this.ctx.rotate(angle);
|
|
this.ctx.translate(-origin.x, -origin.y);
|
|
cb();
|
|
this.ctx.restore();
|
|
}
|
|
drawImage(img, at, w, h) {
|
|
w && h ? this.ctx.drawImage(img, at.x, at.y, w, h) : this.ctx.drawImage(img, at.x, at.y);
|
|
}
|
|
drawSprite(img, spritePos, sWidth, sHeight, at, width, height) {
|
|
this.ctx.drawImage(img, spritePos.x, spritePos.y, sWidth, sHeight, at.x, at.y, width, height);
|
|
}
|
|
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;
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
const maxZoomScale = 4;
|
|
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
|
|
};
|
|
constructor(options){
|
|
super(options);
|
|
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 t11 = e.touches.item(0);
|
|
if (t11) {
|
|
const prev = this.mouse;
|
|
this.mouse = this.getTouchOffset({
|
|
x: t11.clientX,
|
|
y: t11.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, maxZoomScale, 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 === 4 && 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), maxZoomScale);
|
|
this.origin.x = p.x - (p.x - this.origin.x) * scaleBy;
|
|
this.origin.y = p.y - (p.y - this.origin.y) * scaleBy;
|
|
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, maxZoomScale);
|
|
}
|
|
break;
|
|
case -1:
|
|
{
|
|
this.scale = map(frame, 0, 1, maxZoomScale, 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)=>{
|
|
if (window.doodler) throw 'Doodler has already been initialized in this window';
|
|
window.doodler = zoomable ? new ZoomableDoodler(opt) : new Doodler(opt);
|
|
window.doodler.init();
|
|
};
|
|
init({
|
|
width: 400,
|
|
height: 400
|
|
}, true);
|
|
new Vector(100, 300);
|
|
const v = new Vector(30, 30);
|
|
doodler.registerDraggable(v, 20);
|
|
const img = new Image();
|
|
img.src = './EngineSprites.png';
|
|
img.hidden;
|
|
document.body.append(img);
|
|
const p = new Vector(200, 200);
|
|
doodler.createLayer(()=>{
|
|
doodler.line(p.copy().add(-8, 10), p.copy().add(8, 10), {
|
|
color: 'grey',
|
|
weight: 2
|
|
});
|
|
doodler.line(p.copy().add(-8, -10), p.copy().add(8, -10), {
|
|
color: 'grey',
|
|
weight: 2
|
|
});
|
|
doodler.line(p, p.copy().add(0, 12), {
|
|
color: 'brown',
|
|
weight: 4
|
|
});
|
|
doodler.line(p, p.copy().add(0, -12), {
|
|
color: 'brown',
|
|
weight: 4
|
|
});
|
|
});
|
|
document.addEventListener('keyup', (e)=>{
|
|
e.preventDefault();
|
|
if (e.key === ' ') {
|
|
doodler.unregisterDraggable(v);
|
|
}
|
|
});
|