73 lines
No EOL
2 KiB
JavaScript
73 lines
No EOL
2 KiB
JavaScript
/*
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Code for cohesion.
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Allows water to stick to itself.
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radius: How far out of blocks will contribute to sticking
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isAll:
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If this is false or undefined, cohesion occurs (sticks to self)
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If this is true, adhesion and cohesion ocucrs (sticks to non-air)
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*/
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function cohesion(event, radius, isAll = 0) {
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if (event.type != 'tick') return;
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let cx = event.data[0];
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let cy = event.data[1];
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let chunks = event.canvas;
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let dir = [0, 0];
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let force = [0,0];
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let currBlock = chunks.getBlock(cx, cy);
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for (let x = -radius; x <= radius; x ++) {
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for (let y = -radius; y <= radius; y++) {
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let blok = chunks.getBlock(cx + x, cy + y);
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let factor = ((blok == currBlock) * (1-isAll)) + ((blok != air) * isAll);
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if (factor == 0) continue;
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let dist = 0.1 + (1/8 * (-x * -x - y * y + 8) * (x * x + y * y));
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force[0] += x / dist * factor;
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force[1] += y / dist * factor;
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}
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}
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if (force[0] == 0 && force[1] == 0) return;
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dir[0] = (Math.abs(force[0]) < radius*0.1) ? 0 : Math.sign(force[0]);
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dir[1] = (Math.abs(force[1]) < radius*0.1) ? 0 : Math.sign(force[1]);
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if (Math.abs(force[0]) < Math.abs(force[1])) {
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force[0] = 0
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} else {
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force[1] = 0
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}
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let offBlock = chunks.getBlock(cx + dir[0], cy + dir[1]);
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if (currBlock == -1 || offBlock == -1 || offBlock != air || currBlock == offBlock || chunks.noTick[(cx+dir[0])*chunks.height + (cy+dir[1])]) return;
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chunks.setBlock(cx, cy, offBlock);
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chunks.setBlock(cx + dir[0], cy + dir[1], currBlock);
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let t = chunks.getBlock(cx, cy,true);
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let t2 = chunks.getBlock(cx + dir[0], cy + dir[1],true);
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if (t != undefined && t2 != undefined) {
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chunks.setBlock(cx, cy,t2, true);
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chunks.setBlock(cx + dir[0], cy + dir[1], t, true);
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}
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return true;
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}
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Tile.prototype.cohesion = function (radius, isAll) {
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this.interactions.push(function (event) {
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cohesion(event, radius, isAll)
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});
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return this;
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} |