69 lines
1.6 KiB
JavaScript
69 lines
1.6 KiB
JavaScript
///////////////////
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// LODASH IMPORT //
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///////////////////
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// import all lodash functions to the main namespace, but isNaN not to cause conflicts
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_.each(_.keys(_), k => window[k === 'isNaN' ? '_isNaN' : k] = _[k]);
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const
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WORLD_WIDTH = 100,
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WORLD_HEIGHT = 100,
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PIXEL_SIZE = 4,
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DIRTY_COLOR = '#000',
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VIRGIN_COLOR = '#fff',
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RUNS = 10000,
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SPEED = 50,
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// up right down left
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DIRECTIONS = [0, 1, 2, 3],
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displayWorld = (world) => each(world, (row, rowidx) => {
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each(row, (cell, cellidx) => {
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canvas.fillStyle = cell === 1 ? DIRTY_COLOR : VIRGIN_COLOR;
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canvas.fillRect(rowidx * PIXEL_SIZE, cellidx * PIXEL_SIZE, PIXEL_SIZE, PIXEL_SIZE);
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});
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}),
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moveAnt = (world, ant) => {
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world[ant.x][ant.y] = world[ant.x][ant.y] === 1 ? 0 : 1;
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ant.dir = DIRECTIONS[(4 + ant.dir + (world[ant.x][ant.y] === 0 ? 1 : -1)) % 4];
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switch (ant.dir) {
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case DIRECTIONS[0]:
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ant.y -= 1;
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break;
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case DIRECTIONS[1]:
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ant.x -= 1;
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break;
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case DIRECTIONS[2]:
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ant.y += 1;
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break;
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case DIRECTIONS[3]:
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ant.x += 1;
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break;
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}
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return [world, ant];
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},
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updateWorld = (world, ant, runs) => {
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[world, ant] = moveAnt(world, ant);
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displayWorld(world);
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if (runs > 0) setTimeout(partial(updateWorld, world, ant, --runs), SPEED);
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},
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canvas = document.getElementById('c').getContext('2d');
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let
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world = map(range(WORLD_HEIGHT), i => map(range(WORLD_WIDTH), partial(identity, 0))),
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ant = {
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x: WORLD_WIDTH / 2,
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y: WORLD_HEIGHT / 2,
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dir: DIRECTIONS[0]
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};
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canvas.canvas.width = WORLD_WIDTH * PIXEL_SIZE;
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canvas.canvas.height = WORLD_HEIGHT * PIXEL_SIZE;
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updateWorld(world, ant, RUNS);
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