Mercurial > touhou

annotate interpreters/src/th06/std.rs @ 791:a29122662cde

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utils: Simplify translate_2d and align Mat4 to 16 bytes This lowers the amount of instructions from 61 to 32 on PowerPC with AltiVec, and from 25 to 14 on amd64 with AVX2.
author Link Mauve <linkmauve@linkmauve.fr>
date Sat, 17 Jan 2026 14:19:58 +0100
parents 7f9b3f5001c2
children
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1 //! Interpreter of STD files.
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2
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3 use touhou_formats::th06::std::{Stage, Call, Instruction};
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4 use crate::th06::interpolator::{Interpolator, Formula};
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5 use touhou_utils::math::{Mat4, setup_camera};
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6 use std::cell::RefCell;
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7 use std::rc::Rc;
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8
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9 /// Interpreter for Stage.
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10 pub struct StageRunner {
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11 /// XXX: no pub.
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12 pub stage: Rc<RefCell<Stage>>,
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13 frame: u32,
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14
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15 position: Interpolator<f32, 3>,
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16 direction: Interpolator<f32, 3>,
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17
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18 /// XXX: no pub.
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19 pub fog_color: [f32; 4],
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20 /// XXX: no pub.
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21 pub fog_near: f32,
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22 /// XXX: no pub.
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23 pub fog_far: f32,
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24 }
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25
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26 impl StageRunner {
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27 /// Create a new StageRunner attached to a Stage.
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28 pub fn new(stage: Rc<RefCell<Stage>>) -> StageRunner {
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29 StageRunner {
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30 stage,
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31 frame: 0,
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32 position: Interpolator::new([0., 0., 0.], 0, [0., 0., 0.], 0, Formula::Linear),
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33 direction: Interpolator::new([0., 0., 0.], 0, [0., 0., 0.], 0, Formula::Linear),
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34 fog_color: [1.; 4],
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35 fog_near: 0.,
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36 fog_far: 1000.,
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37 }
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38 }
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39
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40 /// Advance the simulation one frame.
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41 pub fn run_frame(&mut self) {
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42 let stage = self.stage.borrow();
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43
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44 for Call { time, instr } in stage.script.iter() {
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45 let time = *time;
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46 if time != self.frame {
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47 continue;
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48 }
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49
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50 println!("{} {:?}", time, instr);
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51
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52 match *instr {
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53 Instruction::SetViewpos(x, y, z) => {
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54 self.position.set_start(time, [x, y, z]);
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55 for Call { time, instr } in stage.script.iter().cloned() {
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56 if time <= self.frame {
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57 continue;
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58 }
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59 if let Instruction::SetViewpos(x, y, z) = instr {
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60 self.position.set_end(time, [x, y, z]);
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61 break;
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62 }
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63 }
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64 }
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65 Instruction::SetFog(b, g, r, a, near, far) => {
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66 self.fog_color = [r as f32 / 255., g as f32 / 255., b as f32 / 255., a as f32 / 255.];
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67 self.fog_near = near;
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68 self.fog_far = far;
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69 }
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70 Instruction::SetViewpos2(dx, dy, dz) => {
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71 let direction = [dx, dy, dz];
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72 self.direction.set_start(time, if time == 0 { direction } else { self.direction.values(time) });
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73 self.direction.set_end_values(direction);
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74 }
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75 Instruction::StartInterpolatingViewpos2(frame, _, _) => {
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76 self.direction.set_end_frame(time + frame);
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77 }
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78 Instruction::StartInterpolatingFog(frame, _, _) => {
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79 }
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80 Instruction::Unknown(_, _, _) => {
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81 }
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82 }
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83 }
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84
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85 self.frame += 1;
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86 }
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87
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88 /// Generate the model-view matrix for the current frame.
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89 pub fn get_model_view(&self) -> Mat4 {
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90 let [x, y, z] = self.position.values(self.frame);
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91
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92 let [dx, dy, dz] = self.direction.values(self.frame);
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93
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94 let view = setup_camera(dx, dy, dz);
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95
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96 let model = Mat4::new([[1., 0., 0., 0.],
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97 [0., 1., 0., 0.],
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98 [0., 0., 1., 0.],
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99 [-x, -y, -z, 1.]]);
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100 model * view
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101 }
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102 }