40 lines
1.0 KiB
TypeScript
40 lines
1.0 KiB
TypeScript
import {quat} from '../tsm/quat';
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export class Quaternion extends quat
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{
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static getIdentity(): Quaternion
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{
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const q = new Quaternion();
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q.setIdentity();
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return q;
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}
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constructor(buf?: Buffer | number[], pos?: number)
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{
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if (buf !== undefined && pos !== undefined && buf instanceof Buffer)
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{
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const x = buf.readFloatLE(pos);
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const y = buf.readFloatLE(pos + 4);
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const z = buf.readFloatLE(pos + 8);
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const xyzsum = 1.0 - x * x - y * y - z * z;
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const w = (xyzsum > 0.0) ? Math.sqrt(xyzsum) : 0;
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super([x, y, z, w]);
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}
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else if (buf !== undefined && Array.isArray(buf))
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{
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super(buf);
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}
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else
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{
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super();
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}
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}
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writeToBuffer(buf: Buffer, pos: number)
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{
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const q: quat = this.normalize();
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buf.writeFloatLE(q.x, pos);
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buf.writeFloatLE(q.y, pos + 4);
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buf.writeFloatLE(q.z, pos + 8);
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}
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}
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