[Home](./index.md) > [@cearth/tools](./tools.md) > [Xyz\_Hpr](./tools.xyz_hpr.md) > [toHeadingPitchRoll](./tools.xyz_hpr.toheadingpitchroll.md) ## Xyz\_Hpr.toHeadingPitchRoll() function Signature: ```typescript function toHeadingPitchRoll(xyz: { x: number; y: number; z: number; }): HeadingPitchRoll; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | xyz | { x: number; y: number; z: number; } | | Returns: HeadingPitchRoll