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July 30, 2022 07:03
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Primatives taking a slice would be cool.
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| /** | |
| * # Motion Packet | |
| * The motion packet gives physics data for all the cars being driven. There is additional data for the car being driven with the goal of being able to drive a motion platform setup. | |
| * N.B. For the normalised vectors below, to convert to float values divide by 32767.0f – 16-bit signed values are used to pack the data and on the assumption that direction values are always between -1.0f and 1.0f. | |
| * Frequency: Rate as specified in menus | |
| * Size: 1464 bytes | |
| * Version: 1 | |
| */ | |
| #[derive(Debug, Clone, Copy)] | |
| pub struct CarMotion | |
| { | |
| pub worldPositionX: f32, // World space X position | |
| pub worldPositionY: f32, // World space Y position | |
| pub worldPositionZ: f32, // World space Z position | |
| pub worldVelocityX: f32, // Velocity in world space X | |
| pub worldVelocityY: f32, // Velocity in world space Y | |
| pub worldVelocityZ: f32, // Velocity in world space Z | |
| pub worldForwardDirX: i16, // World space forward X direction (normalised) | |
| pub worldForwardDirY: i16, // World space forward Y direction (normalised) | |
| pub worldForwardDirZ: i16, // World space forward Z direction (normalised) | |
| pub worldRightDirX: i16, // World space right X direction (normalised) | |
| pub worldRightDirY: i16, // World space right Y direction (normalised) | |
| pub worldRightDirZ: i16, // World space right Z direction (normalised) | |
| pub gForceLateral: f32, // Lateral G-Force component | |
| pub gForceLongitudinal: f32, // Longitudinal G-Force component | |
| pub gForceVertical: f32, // Vertical G-Force component | |
| pub yaw: f32, // Yaw angle in radians | |
| pub pitch: f32, // Pitch angle in radians | |
| pub roll: f32, // Roll angle in radians | |
| } | |
| impl CarMotion | |
| { | |
| pub fn unpack(bytes: &[u8]) -> Self | |
| { | |
| Self { | |
| worldPositionX : f32::from_le_bytes([bytes[0..3]]), | |
| worldPositionY : f32::from_le_bytes([bytes[4..7]]), | |
| worldPositionZ : f32::from_le_bytes([bytes[8..11]]), | |
| worldVelocityX : f32::from_le_bytes([bytes[12..15]]), | |
| worldVelocityY : f32::from_le_bytes([bytes[16..19]]), | |
| worldVelocityZ : f32::from_le_bytes([bytes[20..23]]), | |
| worldForwardDirX : i16::from_le_bytes([bytes[24..25]]), | |
| worldForwardDirY : i16::from_le_bytes([bytes[26..27]]), | |
| worldForwardDirZ : i16::from_le_bytes([bytes[28..29]]), | |
| worldRightDirX : i16::from_le_bytes([bytes[30..31]]), | |
| worldRightDirY : i16::from_le_bytes([bytes[32..33]]), | |
| worldRightDirZ : i16::from_le_bytes([bytes[34..35]]), | |
| gForceLateral : f32::from_le_bytes([bytes[36..39]]), | |
| gForceLongitudinal: f32::from_le_bytes([bytes[40..43]]), | |
| gForceVertical : f32::from_le_bytes([bytes[44..47]]), | |
| yaw : f32::from_le_bytes([bytes[48..51]]), | |
| pitch : f32::from_le_bytes([bytes[52..55]]), | |
| roll : f32::from_le_bytes([bytes[56..59]]), | |
| } | |
| } | |
| } |
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Ideally you wouldn't even need the wrapping [] in the function call.