Working euler golf with controls
This commit is contained in:
parent
f0c0b9853e
commit
74cc58b611
GPG Key ID:
52B3774857EB24B1
@ -4,16 +4,24 @@ body {
|
||||
overflow: scroll;
|
||||
font-family: Lucida Console, Lucida Sans Typewriter, monaco,
|
||||
Bitstream Vera Sans Mono, monospace;
|
||||
width: 100vw;
|
||||
height: 100vh;
|
||||
background: rgb(238, 174, 202);
|
||||
background: radial-gradient(
|
||||
circle,
|
||||
rgba(238, 174, 202, 1) 0%,
|
||||
rgba(148, 187, 233, 1) 100%
|
||||
);
|
||||
}
|
||||
|
||||
.canvas-holder canvas {
|
||||
.canvas {
|
||||
padding: 0;
|
||||
margin: auto;
|
||||
display: block;
|
||||
height: 70vh;
|
||||
width: auto;
|
||||
max-width: 100%;
|
||||
border: 1px solid black;
|
||||
|
||||
width: 100vw;
|
||||
height: 100vw;
|
||||
}
|
||||
|
||||
.button {
|
||||
@ -22,3 +30,15 @@ body {
|
||||
padding: 5px;
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
.controls {
|
||||
padding: 12px;
|
||||
position: fixed;
|
||||
bottom: 0;
|
||||
right: 0;
|
||||
background-color: rgba(255, 255, 255, 0.5);
|
||||
border: 1px solid white;
|
||||
border-radius: 8px;
|
||||
margin-right: 6px;
|
||||
margin-bottom: 6px;
|
||||
}
|
||||
|
||||
@ -5,8 +5,10 @@
|
||||
<link rel="stylesheet" type="text/css" href="css/styles.css" />
|
||||
</head>
|
||||
<body>
|
||||
<div class="canvas-holder">
|
||||
<canvas id="canvas" width="1000" height="1000"></canvas>
|
||||
<canvas id="canvas"></canvas>
|
||||
|
||||
<div class="controls">
|
||||
<span id="iteration-count"></span>
|
||||
</div>
|
||||
|
||||
<script src="js/cx.js"></script>
|
||||
|
||||
@ -1,31 +1,23 @@
|
||||
const CANVAS_ID = "myCanvas";
|
||||
const DEFAULTS = {
|
||||
rows: 15,
|
||||
cols: 15,
|
||||
grid_padding: 10,
|
||||
max_rows: 80,
|
||||
max_cols: 80,
|
||||
min_gap: 40,
|
||||
angle_multiplier: 0.0005,
|
||||
};
|
||||
const CANVAS = document.getElementById("canvas");
|
||||
|
||||
let state = {
|
||||
...DEFAULTS,
|
||||
canvas: document.getElementById("canvas"),
|
||||
ctx: document.getElementById("canvas").getContext("2d"),
|
||||
grid_padding: 10,
|
||||
canvas: CANVAS,
|
||||
ctx: CANVAS.getContext("2d"),
|
||||
last_render: 0,
|
||||
changes: {
|
||||
width: document.body.clientWidth,
|
||||
height: document.body.clientHeight,
|
||||
},
|
||||
};
|
||||
|
||||
const rand_between = (min, max) =>
|
||||
Math.floor(Math.random() * (max - min + 1)) + min;
|
||||
|
||||
const rand_target = (cols, rows) => {
|
||||
const res = new cx(rand_between(0, cols), rand_between(0, rows));
|
||||
if (res.re % 2 || res.im % 2) return rand_target(cols, rows);
|
||||
|
||||
return res;
|
||||
path: [new cx(0, 0), new cx(1, 0)],
|
||||
angle: new cx(0, 0),
|
||||
keys: {},
|
||||
changes: {},
|
||||
};
|
||||
|
||||
// Rendering
|
||||
CanvasRenderingContext2D.prototype.circle = function (x, y, r, color) {
|
||||
this.beginPath();
|
||||
this.arc(x, y, r, 0, Math.PI * 2);
|
||||
@ -35,22 +27,35 @@ CanvasRenderingContext2D.prototype.circle = function (x, y, r, color) {
|
||||
};
|
||||
|
||||
CanvasRenderingContext2D.prototype.line = function (
|
||||
{ x: x1, y: y1 },
|
||||
{ x: x2, y: y2 },
|
||||
{ x_pos: x1, y_pos: y1 },
|
||||
{ x_pos: x2, y_pos: y2 },
|
||||
width,
|
||||
color,
|
||||
cap = "round"
|
||||
) {
|
||||
this.beginPath();
|
||||
this.moveTo(x1, y1);
|
||||
this.lineTo(x2, y2);
|
||||
this.lineWidth = width;
|
||||
this.strokeStyle = color;
|
||||
this.lineCap = cap;
|
||||
|
||||
this.beginPath();
|
||||
this.moveTo(x1, y1);
|
||||
this.lineTo(x2, y2);
|
||||
this.stroke();
|
||||
this.closePath();
|
||||
};
|
||||
|
||||
CanvasRenderingContext2D.prototype.draw_cartesian_path = function (
|
||||
grid_spec,
|
||||
cartesian_path,
|
||||
width = 2,
|
||||
color = "#000"
|
||||
) {
|
||||
const path = cartesian_path.map((coord) => grid_to_canvas(coord, grid_spec));
|
||||
path.slice(1).forEach((coord, i) => {
|
||||
this.line(path[i], coord, width, color);
|
||||
});
|
||||
};
|
||||
|
||||
CanvasRenderingContext2D.prototype.do_grid = function (
|
||||
rows,
|
||||
cols,
|
||||
@ -66,33 +71,92 @@ CanvasRenderingContext2D.prototype.do_grid = function (
|
||||
CanvasRenderingContext2D.prototype.cartesian_grid = function (
|
||||
rows,
|
||||
cols,
|
||||
width,
|
||||
height,
|
||||
grid_padding,
|
||||
circle_spec_at_coords = (x, y) => ({ radius: 5, color: "#000" })
|
||||
grid_spec,
|
||||
circle_spec_at_coords = (_x, _y) => ({ radius: 5, color: "#000" })
|
||||
) {
|
||||
const center = { x: Math.floor(cols / 2), y: Math.floor(rows / 2) };
|
||||
|
||||
const dx = (width - 2 * grid_padding) / cols;
|
||||
const dy = (height - 2 * grid_padding) / rows;
|
||||
|
||||
const start_x = grid_padding + dx / 2;
|
||||
const start_y = grid_padding + dy / 2;
|
||||
|
||||
this.do_grid(rows, cols, (ctx, x, y) => {
|
||||
const x_pos = x * dx + start_x;
|
||||
const y_pos = y * dy + start_y;
|
||||
const { x_pos, y_pos } = grid_to_canvas({ x, y }, grid_spec);
|
||||
const { radius, color } = circle_spec_at_coords(x, y);
|
||||
|
||||
ctx.circle(x_pos, y_pos, radius, color);
|
||||
});
|
||||
};
|
||||
|
||||
const render = ({ canvas, ctx, rows, cols, grid_padding }) => {
|
||||
const { width, height } = canvas;
|
||||
// Utilities
|
||||
const move = (prev, curr, c) => cx.add(prev, cx.mult(c, cx.sub(curr, prev)));
|
||||
|
||||
const rand_between = (min, max) =>
|
||||
Math.floor(Math.random() * (max - min + 1)) + min;
|
||||
|
||||
const rand_target = (cols, rows) => {
|
||||
const res = new cx(rand_between(0, cols), rand_between(0, rows));
|
||||
if (res.re % 2 || res.im % 2) return rand_target(cols, rows);
|
||||
|
||||
return res;
|
||||
};
|
||||
|
||||
const calculate_grid_spec = ({ rows, cols, width, height, grid_padding }) => {
|
||||
const dx = (width - 2 * grid_padding) / cols;
|
||||
const dy = (height - 2 * grid_padding) / rows;
|
||||
|
||||
return {
|
||||
dx,
|
||||
dy,
|
||||
start_x: grid_padding + dx / 2,
|
||||
start_y: grid_padding + dy / 2,
|
||||
};
|
||||
};
|
||||
|
||||
const grid_to_canvas = ({ x, y }, { dx, dy, start_x, start_y }) => ({
|
||||
x_pos: x * dx + start_x,
|
||||
y_pos: y * dy + start_y,
|
||||
});
|
||||
|
||||
const complex_to_grid = (c, rows, cols) => {
|
||||
const { re, im } = c;
|
||||
return {
|
||||
x: re + Math.floor(cols / 2),
|
||||
y: Math.floor(rows / 2) - im,
|
||||
};
|
||||
};
|
||||
|
||||
// Game loop
|
||||
const handle_input = (state, dt) => {
|
||||
if (state.keys.ArrowLeft) {
|
||||
state.angle.im += DEFAULTS.angle_multiplier * dt;
|
||||
} else if (state.keys.ArrowRight) {
|
||||
state.angle.im -= DEFAULTS.angle_multiplier * dt;
|
||||
}
|
||||
|
||||
if (state.angle.im <= -1 || state.angle.im >= 1) {
|
||||
state.angle.im = state.angle.im <= -1 ? -1 : 1;
|
||||
state.path.push(move(state.path.at(-2), state.path.at(-1), state.angle));
|
||||
state.angle = new cx(0, 0);
|
||||
}
|
||||
};
|
||||
|
||||
const render = ({ width, height, ctx, rows, cols } = state) => {
|
||||
ctx.clearRect(0, 0, width, height);
|
||||
ctx.cartesian_grid(rows, cols, width, height, grid_padding, (x, y) => {
|
||||
ctx.fillStyle = "rgba(255, 255, 255, 0)";
|
||||
ctx.fillRect(0, 0, width, height);
|
||||
|
||||
const grid_spec = calculate_grid_spec(state);
|
||||
|
||||
const curr = state.path.at(-1);
|
||||
const prev = state.path.at(-2);
|
||||
|
||||
const v_diff = cx.sub(curr, prev);
|
||||
const theta = (state.angle.im * Math.PI) / 2;
|
||||
|
||||
const angle_re = Math.cos(theta) * v_diff.re - Math.sin(theta) * v_diff.im;
|
||||
const angle_im = Math.sin(theta) * v_diff.re + Math.cos(theta) * v_diff.im;
|
||||
|
||||
ctx.draw_cartesian_path(grid_spec, [
|
||||
...state.path.map((c) => complex_to_grid(c, rows, cols)),
|
||||
complex_to_grid(cx.add(new cx(angle_re, angle_im), prev), rows, cols),
|
||||
]);
|
||||
|
||||
ctx.cartesian_grid(rows, cols, grid_spec, (x, y) => {
|
||||
if (x == Math.floor(cols / 2) && y == Math.floor(rows / 2)) {
|
||||
return {
|
||||
radius: 7,
|
||||
@ -101,7 +165,7 @@ const render = ({ canvas, ctx, rows, cols, grid_padding }) => {
|
||||
} else {
|
||||
return {
|
||||
radius: 3,
|
||||
color: "#000",
|
||||
color: `rgb(${255 * (x / cols)}, 100, 100)`, // todo: animate with last_render
|
||||
};
|
||||
}
|
||||
});
|
||||
@ -110,14 +174,48 @@ const render = ({ canvas, ctx, rows, cols, grid_padding }) => {
|
||||
const loop = (now) => {
|
||||
const dt = now - state.last_render;
|
||||
state.changes.last_render = now;
|
||||
if (Object.keys(state.changes).length > 0) {
|
||||
state = { ...state, ...state.changes };
|
||||
state.changes = {};
|
||||
|
||||
render(state);
|
||||
if (Object.keys(state.changes).length > 0) {
|
||||
if (state.changes.width || state.changes.height) {
|
||||
state.changes.rows = Math.min(
|
||||
DEFAULTS.max_rows,
|
||||
state.changes.height / DEFAULTS.min_gap
|
||||
);
|
||||
state.changes.cols = Math.min(
|
||||
DEFAULTS.max_cols,
|
||||
state.changes.width / DEFAULTS.min_gap
|
||||
);
|
||||
}
|
||||
|
||||
state = { ...state, ...state.changes };
|
||||
state.changes = {};
|
||||
}
|
||||
|
||||
handle_input(state, dt);
|
||||
render(state);
|
||||
requestAnimationFrame(loop);
|
||||
};
|
||||
|
||||
// DOM
|
||||
const on_resize = () => {
|
||||
CANVAS.width = document.body.clientWidth;
|
||||
CANVAS.height = document.body.clientHeight;
|
||||
state.changes.width = CANVAS.width;
|
||||
state.changes.height = CANVAS.height;
|
||||
};
|
||||
|
||||
const on_keyup = (e) => {
|
||||
delete state.keys[e.key];
|
||||
};
|
||||
|
||||
const on_keydown = (e) => {
|
||||
state.keys[e.key] = true;
|
||||
};
|
||||
|
||||
window.addEventListener("resize", on_resize);
|
||||
window.addEventListener("keydown", on_keydown);
|
||||
window.addEventListener("keyup", on_keyup);
|
||||
|
||||
// main
|
||||
on_resize();
|
||||
requestAnimationFrame(loop);
|
||||
|
||||
@ -5,8 +5,6 @@ const DIRECTION = {
|
||||
1: new cx(0, -1),
|
||||
};
|
||||
|
||||
const move = (prev, curr, c) => cx.add(prev, cx.mult(c, cx.sub(curr, prev)));
|
||||
|
||||
const construct_moves = (curr, prev) =>
|
||||
Object.keys(DIRECTION).map((x) => move(curr, prev, DIRECTION[x]));
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user