54 lines
1.0 KiB
JavaScript
54 lines
1.0 KiB
JavaScript
class LayoutGroup {
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constructor(nodes) {
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this.nodes = new Set(nodes);
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this.tension = 0;
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}
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setTension() {
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// Groups don't track tension, since we always want to sort last for total
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// tension
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this.vec = [0, 0];
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for (let node of this.nodes.values()) {
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node.setTension();
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for (let i of [0, 1]) {
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this.vec[i] += node.vec[i];
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};
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}
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}
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offsetCollides(offset) {
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for (let node of this.nodes.values()) {
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let other = node.offsetCollides(offset);
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if (other && !this.nodes.has(other)) {
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return other;
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}
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}
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return null;
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}
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savePos() {
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for (let node of this.nodes.values()) {
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node.savePos();
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}
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}
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restorePos() {
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for (let node of this.nodes.values()) {
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node.restorePos();
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}
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}
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moveBy(offset) {
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let nodes = new Set(this.nodes.values());
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while (nodes.size) {
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for (let node of nodes) {
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if (node.offsetCollides(offset)) {
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continue;
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}
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node.moveBy(offset);
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nodes.delete(node);
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}
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}
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}
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}
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