@babylonjs/core/FlowGraph/flowGraphMath.js

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import { Clamp } from "../Maths/math.scalar.functions.js";
import { Quaternion, Vector3 } from "../Maths/math.vector.js";
import { Vector3Dot, Vector4Dot } from "../Maths/math.vector.functions.js";
// *** NOTE ***
// These functions should ideally go in math.vector.functions.ts, but they require math.vector.ts to
// be imported which is big. To avoid the larger bundle size, they are kept inside flow graph for now.
/**
 * Returns the angle in radians between two quaternions
 * @param q1 defines the first quaternion
 * @param q2 defines the second quaternion
 * @returns the angle in radians between the two quaternions
 */
export function GetAngleBetweenQuaternions(q1, q2) {
    return Math.acos(Clamp(Vector4Dot(q1, q2), -1, 1)) * 2;
}
/**
 * Creates a quaternion from two direction vectors
 * @param a defines the first direction vector
 * @param b defines the second direction vector
 * @returns the target quaternion
 */
export function GetQuaternionFromDirections(a, b) {
    const result = new Quaternion();
    GetQuaternionFromDirectionsToRef(a, b, result);
    return result;
}
/**
 * Creates a quaternion from two direction vectors
 * @param a defines the first direction vector
 * @param b defines the second direction vector
 * @param result defines the target quaternion
 * @returns the target quaternion
 */
export function GetQuaternionFromDirectionsToRef(a, b, result) {
    const axis = Vector3.Cross(a, b);
    const angle = Math.acos(Clamp(Vector3Dot(a, b), -1, 1));
    Quaternion.RotationAxisToRef(axis, angle, result);
    return result;
}
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