annotate examples/eclrenderer.rs @ 696:7ae576a418ff

ecl_vm: implement Call, Return, and the call stack thingy.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 23 Aug 2019 02:31:08 +0200
parents ac092b70c39a
children ccb739c5b66c
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1 use image::GenericImageView;
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2 use luminance::context::GraphicsContext;
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3 use luminance::framebuffer::Framebuffer;
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4 use luminance::pipeline::BoundTexture;
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5 use luminance::pixel::{NormRGB8UI, Floating};
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6 use luminance::render_state::RenderState;
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7 use luminance::shader::program::{Program, Uniform};
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8 use luminance::tess::{Mode, TessBuilder};
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9 use luminance::texture::{Dim2, Flat, Sampler, Texture, GenMipmaps};
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10 use luminance_derive::{Semantics, Vertex, UniformInterface};
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11 use luminance_glfw::event::{Action, Key, WindowEvent};
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12 use luminance_glfw::surface::{GlfwSurface, Surface, WindowDim, WindowOpt};
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13 use touhou::th06::anm0::Anm0;
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14 use touhou::th06::anm0_vm::{Sprite, Vertex as FakeVertex};
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15 use touhou::th06::ecl::{Ecl, Rank};
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16 use touhou::th06::ecl_vm::EclRunner;
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17 use touhou::th06::enemy::{Enemy, Game, Position};
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18 use touhou::util::math::{perspective, setup_camera};
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19 use touhou::util::prng::Prng;
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20 use std::cell::RefCell;
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21 use std::fs::File;
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22 use std::io::{BufReader, Read};
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23 use std::rc::Rc;
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24 use std::env;
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25 use std::path::Path;
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26
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27 const VS: &str = r#"
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28 in ivec3 in_position;
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29 in vec2 in_texcoord;
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30 in uvec4 in_color;
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31
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32 uniform mat4 mvp;
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33
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34 out vec2 texcoord;
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35 out vec4 color;
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36
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37 void main()
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38 {
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39 gl_Position = mvp * vec4(vec3(in_position), 1.0);
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40 texcoord = vec2(in_texcoord);
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41
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42 // Normalized from the u8 being passed.
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43 color = vec4(in_color) / 255.;
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44 }
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45 "#;
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46
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47 const FS: &str = r#"
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48 in vec2 texcoord;
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49 in vec4 color;
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50
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51 uniform sampler2D color_map;
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52
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53 out vec4 frag_color;
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54
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55 void main()
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56 {
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57 frag_color = texture(color_map, texcoord) * color;
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58 }
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59 "#;
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60
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61 #[derive(Clone, Copy, Debug, Eq, PartialEq, Semantics)]
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62 pub enum Semantics {
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63 #[sem(name = "in_position", repr = "[i16; 3]", wrapper = "VertexPosition")]
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64 Position,
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65
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66 #[sem(name = "in_texcoord", repr = "[f32; 2]", wrapper = "VertexTexcoord")]
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67 Texcoord,
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68
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69 #[sem(name = "in_color", repr = "[u8; 4]", wrapper = "VertexColor")]
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70 Color,
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71 }
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72
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73 #[repr(C)]
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74 #[derive(Clone, Copy, Debug, PartialEq, Vertex)]
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75 #[vertex(sem = "Semantics")]
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76 struct Vertex {
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77 pos: VertexPosition,
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78 uv: VertexTexcoord,
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79 rgba: VertexColor,
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80 }
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81
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82 #[derive(UniformInterface)]
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83 struct ShaderInterface {
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84 // the 'static lifetime acts as “anything” here
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85 color_map: Uniform<&'static BoundTexture<'static, Flat, Dim2, Floating>>,
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86
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87 #[uniform(name = "mvp")]
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88 mvp: Uniform<[[f32; 4]; 4]>,
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89 }
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90
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91 fn main() {
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92 // Parse arguments.
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93 let args: Vec<_> = env::args().collect();
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94 if args.len() != 6 {
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95 eprintln!("Usage: {} <ECL file> <ANM file> <PNG file> <easy|normal|hard|lunatic> <sub number>", args[0]);
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96 return;
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97 }
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98 let ecl_filename = &args[1];
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99 let anm_filename = &args[2];
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100 let png_filename = &args[3];
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101 let rank: Rank = args[4].parse().expect("rank");
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102 let sub: u16 = args[5].parse().expect("number");
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103
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104 // Open the ECL file.
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105 let file = File::open(ecl_filename).unwrap();
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106 let mut file = BufReader::new(file);
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107 let mut buf = vec![];
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108 file.read_to_end(&mut buf).unwrap();
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109 let (_, ecl) = Ecl::from_slice(&buf).unwrap();
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110
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111 // Open the ANM file.
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112 let file = File::open(anm_filename).unwrap();
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113 let mut file = BufReader::new(file);
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114 let mut buf = vec![];
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115 file.read_to_end(&mut buf).unwrap();
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116 let anm0 = Anm0::from_slice(&buf).unwrap();
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117 let anm0 = Rc::new(RefCell::new(anm0));
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118
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119 if ecl.subs.len() < sub as usize {
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120 eprintln!("This ecl doesn’t contain a sub named {}.", sub);
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121 return;
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122 }
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123
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124 // Get the time since January 1970 as a seed for the PRNG.
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125 let time = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap();
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126 let prng = Rc::new(RefCell::new(Prng::new(time.subsec_micros() as u16)));
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127
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128 // Create the Game god object.
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129 let game = Game::new(prng, rank);
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130 let game = Rc::new(RefCell::new(game));
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131
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132 // And the enemy object.
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133 let enemy = Enemy::new(Position::new(0., 0.), 500, 0, 640, Rc::downgrade(&anm0), Rc::downgrade(&game));
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134 let mut ecl_runner = EclRunner::new(&ecl, enemy.clone(), sub);
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135
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136 assert_eq!(std::mem::size_of::<Vertex>(), std::mem::size_of::<FakeVertex>());
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137 let vertices: [Vertex; 4] = unsafe { std::mem::uninitialized() };
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138
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139 let mut surface = GlfwSurface::new(WindowDim::Windowed(384, 448), "Touhou", WindowOpt::default()).unwrap();
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140
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141 // Open the image atlas matching this ANM.
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142 let tex = load_from_disk(&mut surface, Path::new(png_filename)).expect("texture loading");
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143
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144 // set the uniform interface to our type so that we can read textures from the shader
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145 let (program, _) =
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146 Program::<Semantics, (), ShaderInterface>::from_strings(None, VS, None, FS).expect("program creation");
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147
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148 let mut tess = TessBuilder::new(&mut surface)
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149 .add_vertices(vertices)
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150 .set_mode(Mode::TriangleFan)
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151 .build()
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152 .unwrap();
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153
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154 let mut back_buffer = Framebuffer::back_buffer(surface.size());
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155
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156 'app: loop {
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157 for event in surface.poll_events() {
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158 match event {
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159 WindowEvent::Close | WindowEvent::Key(Key::Escape, _, Action::Release, _) => break 'app,
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160
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161 WindowEvent::FramebufferSize(width, height) => {
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162 back_buffer = Framebuffer::back_buffer([width as u32, height as u32]);
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163 }
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164
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165 _ => (),
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166 }
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167 }
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168
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169 if ecl_runner.running == false {
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170 break;
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171 }
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172
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173 {
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174 let mut slice = tess
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175 .as_slice_mut()
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176 .unwrap();
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177
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178 ecl_runner.run_frame();
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179 {
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180 let mut enemy = enemy.borrow_mut();
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181 enemy.update();
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182 }
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183 let mut game = game.borrow_mut();
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184 game.run_frame();
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185 let sprites = game.get_sprites();
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186 fill_vertices_ptr(sprites, slice.as_mut_ptr());
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187 }
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188
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189 // here, we need to bind the pipeline variable; it will enable us to bind the texture to the GPU
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190 // and use it in the shader
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191 surface
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192 .pipeline_builder()
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193 .pipeline(&back_buffer, [0., 0., 0., 0.], |pipeline, shd_gate| {
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194 // bind our fancy texture to the GPU: it gives us a bound texture we can use with the shader
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195 let bound_tex = pipeline.bind_texture(&tex);
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196
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197 shd_gate.shade(&program, |rdr_gate, iface| {
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198 // update the texture; strictly speaking, this update doesn’t do much: it just tells the GPU
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199 // to use the texture passed as argument (no allocation or copy is performed)
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200 iface.color_map.update(&bound_tex);
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201 //let mvp = ortho_2d(0., 384., 448., 0.);
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202 let proj = perspective(0.5235987755982988, 384. / 448., 101010101./2010101., 101010101./10101.);
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203 let view = setup_camera(0., 0., 1.);
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204 let mvp = view * proj;
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205 //println!("{:#?}", mvp);
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206 // TODO: check how to pass by reference.
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207 iface.mvp.update(*mvp.borrow_inner());
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208
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209 rdr_gate.render(RenderState::default(), |tess_gate| {
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210 // render the tessellation to the surface the regular way and let the vertex shader’s
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211 // magic do the rest!
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212 tess_gate.render(&mut surface, (&tess).into());
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213 });
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214 });
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215 });
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216
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217 surface.swap_buffers();
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218 }
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219 }
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220
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221 fn fill_vertices_ptr(sprites: Vec<(f32, f32, f32, Rc<RefCell<Sprite>>)>, vertices: *mut Vertex) {
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222 let mut fake_vertices = unsafe { std::mem::transmute::<*mut Vertex, &mut [FakeVertex; 4]>(vertices) };
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223 for (x, y, z, sprite) in sprites {
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224 let sprite = sprite.borrow();
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225 sprite.fill_vertices(&mut fake_vertices, x, y, z);
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226 }
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227 }
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228
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229 fn load_from_disk(surface: &mut GlfwSurface, path: &Path) -> Option<Texture<Flat, Dim2, NormRGB8UI>> {
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230 // load the texture into memory as a whole bloc (i.e. no streaming)
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231 match image::open(&path) {
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232 Ok(img) => {
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233 let (width, height) = img.dimensions();
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234 let texels = img
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235 .pixels()
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236 .map(|(x, y, rgb)| (rgb[0], rgb[1], rgb[2]))
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237 .collect::<Vec<_>>();
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238
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239 // create the luminance texture; the third argument is the number of mipmaps we want (leave it
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240 // to 0 for now) and the latest is a the sampler to use when sampling the texels in the
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241 // shader (we’ll just use the default one)
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242 let tex =
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243 Texture::new(surface, [width, height], 0, &Sampler::default()).expect("luminance texture creation");
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244
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245 // the first argument disables mipmap generation (we don’t care so far)
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246 tex.upload(GenMipmaps::No, &texels);
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247
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248 Some(tex)
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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249 }
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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250
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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251 Err(e) => {
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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252 eprintln!("cannot open image {}: {}", path.display(), e);
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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253 None
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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254 }
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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255 }
3a9d82a02c88 Add a contructor for enemy, and a new example.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
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256 }