Mercurial > touhou
annotate src/th06/std.rs @ 709:6d4802abe134
Make interpolators use u32 instead of u16.
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sun, 08 Sep 2019 17:53:13 +0200 |
parents | ef2dbd676a91 |
children | 377c241be559 |
rev | line source |
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671
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1 //! STD background format support. |
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2 |
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3 use nom::{ |
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4 IResult, |
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5 bytes::complete::{tag, take_while_m_n}, |
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6 number::complete::{le_u8, le_u16, le_u32, le_i32, le_f32}, |
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7 sequence::tuple, |
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8 combinator::map, |
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9 }; |
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10 use encoding_rs::SHIFT_JIS; |
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11 use std::collections::HashMap; |
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12 |
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13 /// A float position in the 3D space. |
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14 #[derive(Debug, Clone)] |
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15 pub struct Position { |
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16 /// X component. |
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17 pub x: f32, |
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18 |
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19 /// Y component. |
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20 pub y: f32, |
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21 |
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22 /// Z component. |
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23 pub z: f32, |
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24 } |
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25 |
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26 /// A 3D box around something. |
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27 #[derive(Debug, Clone)] |
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28 struct Box3D { |
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29 width: f32, |
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30 height: f32, |
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31 depth: f32, |
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32 } |
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33 |
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34 /// A 2D box around something. |
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35 #[derive(Debug, Clone)] |
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36 pub struct Box2D { |
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37 /// Width. |
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38 pub width: f32, |
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39 |
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40 /// Height. |
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41 pub height: f32, |
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42 } |
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43 |
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44 /// A quad in the 3D space. |
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45 #[derive(Debug, Clone)] |
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46 pub struct Quad { |
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47 /// The anm script to run for this quad. |
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48 pub anm_script: u16, |
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49 |
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50 /// The position of this quad in the 3D space. |
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51 pub pos: Position, |
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52 |
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53 /// The size of this quad. |
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54 pub size_override: Box2D, |
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55 } |
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56 |
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57 /// A model formed of multiple quads in space. |
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58 #[derive(Debug, Clone)] |
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59 pub struct Model { |
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60 /// TODO: find what that is. |
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61 pub unknown: u16, |
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62 |
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63 /// The bounding box around this model. |
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64 pub bounding_box: [f32; 6], |
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65 |
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66 /// The quads composing this model. |
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67 pub quads: Vec<Quad>, |
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68 } |
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69 |
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70 /// An instance of a model. |
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71 #[derive(Debug, Clone)] |
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72 pub struct Instance { |
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73 /// The instance identifier. |
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74 pub id: u16, |
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75 |
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76 /// Where to position the instance of this model. |
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77 pub pos: Position, |
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78 } |
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79 |
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80 /// A single instruction, part of a `Script`. |
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81 #[derive(Debug, Clone)] |
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82 pub struct Call { |
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83 /// Time at which this instruction will be called. |
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84 pub time: u32, |
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85 |
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86 /// The instruction to call. |
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87 pub instr: Instruction, |
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88 } |
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89 |
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90 /// Parse a SHIFT_JIS byte string of length 128 into a String. |
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91 pub fn le_String(i: &[u8]) -> IResult<&[u8], String> { |
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92 let data = i.splitn(2, |c| *c == b'\0').nth(0).unwrap(); |
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93 let (string, encoding, replaced) = SHIFT_JIS.decode(data); |
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94 Ok((&i[128..], string.into_owned())) |
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95 } |
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96 |
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97 /// Main struct of the STD stage format. |
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98 #[derive(Debug, Clone)] |
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99 pub struct Stage { |
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100 /// The name of the stage. |
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101 pub name: String, |
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102 |
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103 /// A list of (name, path) of background music. |
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104 // TODO: there are maximum four of them, and in practice never more than 2. |
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105 pub musics: Vec<Option<(String, String)>>, |
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106 |
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107 /// List of models. |
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108 pub models: Vec<Model>, |
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109 |
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110 /// List of instances. |
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111 pub instances: Vec<Instance>, |
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112 |
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113 /// List of instructions in the script. |
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114 pub script: Vec<Call>, |
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115 } |
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116 |
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117 impl Stage { |
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118 /// Parse a slice of bytes into an `Stage` struct. |
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119 pub fn from_slice(data: &[u8]) -> IResult<&[u8], Stage> { |
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120 parse_stage(data) |
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121 } |
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122 } |
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123 |
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124 macro_rules! declare_stage_instructions { |
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125 ($($opcode:tt => fn $name:ident($($arg:ident: $arg_type:ident),*)),*,) => { |
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126 /// Available instructions in an `Stage`. |
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127 #[allow(missing_docs)] |
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128 #[derive(Debug, Clone, Copy)] |
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129 pub enum Instruction { |
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130 $( |
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131 $name($($arg_type),*) |
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132 ),* |
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133 } |
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134 |
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135 fn parse_instruction_args(input: &[u8], opcode: u16) -> IResult<&[u8], Instruction> { |
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136 let mut i = &input[..]; |
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137 let instr = match opcode { |
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138 $( |
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139 $opcode => { |
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140 $( |
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141 let (i2, $arg) = concat_idents!(le_, $arg_type)(i)?; |
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142 i = i2; |
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143 )* |
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144 Instruction::$name($($arg),*) |
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145 } |
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146 )* |
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147 _ => unreachable!() |
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148 }; |
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149 Ok((i, instr)) |
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150 } |
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151 }; |
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152 } |
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153 |
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154 declare_stage_instructions!{ |
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155 0 => fn SetViewpos(x: f32, y: f32, z: f32), |
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156 1 => fn SetFog(r: u8, g: u8, b: u8, a: u8, near: f32, far: f32), |
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157 2 => fn SetViewpos2(x: f32, y: f32, z: f32), |
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158 3 => fn StartInterpolatingViewpos2(frame: i32, _unused: i32, _unused: i32), |
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159 4 => fn StartInterpolatingFog(frame: i32, _unused: i32, _unused: i32), |
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160 5 => fn Unknown(_unused: i32, _unused: i32, _unused: i32), |
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161 } |
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162 |
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163 fn parse_stage(input: &[u8]) -> IResult<&[u8], Stage> { |
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164 let start_offset = 0; |
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165 let i = &input[start_offset..]; |
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166 let (i, (num_models, num_faces, object_instances_offset, script_offset, _)) = tuple((le_u16, le_u16, le_u32, le_u32, tag(b"\0\0\0\0")))(i)?; |
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167 let object_instances_offset = object_instances_offset as usize; |
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168 let script_offset = script_offset as usize; |
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169 |
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170 let (i, name) = le_String(i)?; |
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171 let (i, music_names) = map(tuple((le_String, le_String, le_String, le_String)), |(a, b, c, d)| [a, b, c, d])(i)?; |
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172 let (mut i, music_paths) = map(tuple((le_String, le_String, le_String, le_String)), |(a, b, c, d)| [a, b, c, d])(i)?; |
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173 let musics = music_names.iter().zip(&music_paths).map(|(name, path)| if name == " " { None } else { Some((name.clone(), path.clone())) }).collect(); |
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174 |
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175 let mut offsets = vec![]; |
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176 for _ in 0..num_models { |
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177 let (i2, offset) = le_u32(i)?; |
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178 offsets.push(offset as usize); |
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179 i = i2; |
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180 } |
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181 |
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182 // Read model definitions. |
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183 let mut models = vec![]; |
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184 for offset in offsets { |
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185 let i = &input[offset..]; |
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186 let (mut i, (id, unknown, x, y, z, width, height, depth)) = tuple((le_u16, le_u16, le_f32, le_f32, le_f32, le_f32, le_f32, le_f32))(i)?; |
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187 let bounding_box = [x, y, z, width, height, depth]; |
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188 let mut quads = vec![]; |
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189 loop { |
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190 let (i2, (unk1, size)) = tuple((le_u16, le_u16))(i)?; |
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191 if unk1 == 0xffff { |
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192 break; |
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193 } |
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194 assert_eq!(size, 0x1c); |
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195 let (i2, (anm_script, _, x, y, z, width, height)) = tuple((le_u16, tag(b"\0\0"), le_f32, le_f32, le_f32, le_f32, le_f32))(i2)?; |
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196 let quad = Quad { |
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197 anm_script, |
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198 pos: Position { x, y, z }, |
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199 size_override: Box2D { width, height }, |
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200 }; |
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201 quads.push(quad); |
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202 i = i2; |
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203 } |
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204 let model = Model { |
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205 unknown, |
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206 bounding_box, |
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207 quads, |
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208 }; |
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209 models.push(model); |
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210 } |
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211 |
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212 // Read object usage. |
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213 let mut instances = vec![]; |
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214 let mut i = &input[object_instances_offset..]; |
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215 loop { |
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216 let (i2, (id, unknown, x, y, z)) = tuple((le_u16, le_u16, le_f32, le_f32, le_f32))(i)?; |
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217 if id == 0xffff && unknown == 0xffff { |
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218 break; |
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219 } |
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220 assert_eq!(unknown, 0x100); |
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221 let instance = Instance { |
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222 id, |
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223 pos: Position { x, y, z }, |
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224 }; |
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225 instances.push(instance); |
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226 i = i2; |
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227 } |
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228 |
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229 // Read the script. |
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230 let mut script = vec![]; |
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231 let mut i = &input[script_offset..]; |
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232 loop { |
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233 let (i2, (time, opcode, size)) = tuple((le_u32, le_u16, le_u16))(i)?; |
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234 if time == 0xffffffff && opcode == 0xffff && size == 0xffff { |
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235 break; |
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236 } |
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237 assert_eq!(size, 12); |
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238 let data = &i2[..12]; |
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239 let (data, instr) = parse_instruction_args(data, opcode)?; |
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240 assert_eq!(data.len(), 0); |
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241 println!("{} {:?}", time, instr); |
671
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242 script.push(Call { time, instr }); |
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243 i = &i2[12..]; |
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244 } |
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245 |
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246 let stage = Stage { |
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247 name, |
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248 musics, |
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249 models, |
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250 instances, |
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251 script, |
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252 }; |
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253 Ok((b"", stage)) |
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254 } |
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255 |
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256 #[cfg(test)] |
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257 mod tests { |
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258 use super::*; |
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259 use std::io::{self, Read}; |
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260 use std::fs::File; |
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261 |
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262 #[test] |
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263 fn std() { |
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264 let file = File::open("EoSD/ST/stage1.std").unwrap(); |
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265 let mut file = io::BufReader::new(file); |
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266 let mut buf = vec![]; |
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267 file.read_to_end(&mut buf).unwrap(); |
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268 let (_, stage) = Stage::from_slice(&buf).unwrap(); |
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269 assert_eq!(stage.name, "夢幻夜行絵巻 ~ Mystic Flier"); |
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270 assert_eq!(stage.musics.len(), 4); |
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271 assert_eq!(stage.models.len(), 13); |
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272 assert_eq!(stage.instances.len(), 90); |
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273 assert_eq!(stage.script.len(), 21); |
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274 } |
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275 } |