iframe-proxy | Sunbelt Computer Software

History

163 lines (141 loc) · 3.97 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

use bytemuck::{Pod, Zeroable};

use serde::{Deserialize, Serialize};

use thiserror::Error;

use libcraft_core::{BlockPosition, ChunkPosition, Position};

use std::convert::TryFrom;

/// Validated position of a block.

///

/// This structure is immutable.

/// All operations that change a [`ValidBlockPosition`] must be done by

/// turning it into a [`BlockPosition`], performing said operations,

/// then using [`ValidBlockPosition`]'s [`TryFrom`] impl to get a [`ValidBlockPosition`].

///

/// The definition of a valid block position is defined by [`BlockPosition::valid`].

///

/// # Examples

///

/// Converting a [`BlockPosition`] to a [`ValidBlockPosition`], unwrapping any errors that

/// occur.

/// ```

/// # use feather_base::BlockPosition;

/// # use feather_base::ValidBlockPosition;

/// # use std::convert::TryInto;

/// // Create an unvalidated block position

/// let block_position = BlockPosition::new(727, 32, 727);

///

/// // Validate the block position and unwrap any errors

/// let valid_block_position: ValidBlockPosition = block_position.try_into().unwrap();

/// ```

///

/// Performing operations on a [`ValidBlockPosition`], then re-validating it.

/// ```

/// # use feather_base::BlockPosition;

/// # use feather_base::ValidBlockPosition;

/// # use std::convert::TryInto;

/// # let mut valid_block_position: ValidBlockPosition = BlockPosition::new(727, 32, 727).try_into().unwrap();

/// // Convert the ValidBlockPosition into an unvalidated one to perform math

/// let mut block_position: BlockPosition = valid_block_position.into();

///

/// block_position.x = 821;

/// block_position.z += 32;

///

/// assert!(block_position.valid());

///

/// valid_block_position = block_position.try_into().unwrap();

/// ```

#[derive(

Clone,

Copy,

Debug,

PartialEq,

Eq,

Hash,

PartialOrd,

Ord,

Default,

Serialize,

Deserialize,

Zeroable,

Pod,

)]

#[repr(C)]

pub struct ValidBlockPosition {

x: i32,

y: i32,

z: i32,

}

impl ValidBlockPosition {

pub fn x(&self) -> i32 {

self.x

}

pub fn y(&self) -> i32 {

self.y

}

pub fn z(&self) -> i32 {

self.z

}

pub fn chunk(self) -> ChunkPosition {

self.into()

}

pub fn position(self) -> Position {

self.into()

}

impl TryFrom<BlockPosition> for ValidBlockPosition {

type Error = BlockPositionValidationError;

fn try_from(value: BlockPosition) -> Result<Self, Self::Error> {

if value.valid() {

Ok(ValidBlockPosition {

x: value.x,

y: value.y,

z: value.z,

})

} else {

Err(BlockPositionValidationError::OutOfRange(value))

}

impl From<ValidBlockPosition> for BlockPosition {

fn from(position: ValidBlockPosition) -> Self {

BlockPosition {

x: position.x,

y: position.y,

z: position.z,

}

impl From<ValidBlockPosition> for ChunkPosition {

fn from(position: ValidBlockPosition) -> Self {

let position: BlockPosition = position.into();

position.into()

}

impl From<ValidBlockPosition> for Position {

fn from(position: ValidBlockPosition) -> Self {

let position: BlockPosition = position.into();

position.into()

}

#[derive(Error, Debug)]

pub enum BlockPositionValidationError {

#[error("coordinate {0:?} out of range")]

OutOfRange(BlockPosition),

}

#[cfg(test)]

mod tests {

use std::convert::TryInto;

use libcraft_core::BlockPosition;

use crate::ValidBlockPosition;

#[test]

#[should_panic]

fn check_out_of_bounds_up() {

let block_position = BlockPosition::new(0, 39483298, 0);

<BlockPosition as TryInto<ValidBlockPosition>>::try_into(block_position).unwrap();

}

#[test]

#[should_panic]

fn check_out_of_bounds_down() {

let block_position = BlockPosition::new(0, -39483298, 0);

<BlockPosition as TryInto<ValidBlockPosition>>::try_into(block_position).unwrap();

}

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Uh oh!

Sunbelt Computer Software

PL/B Language Development and Support

Uh oh!

FilesExpand file tree

block.rs

Latest commit

History

block.rs

File metadata and controls