Simplify projet structure

src/state.rs

@@ -0,0 +1,507 @@
+use super::render::{
+    Vertex, Camera, CameraUniform, CameraController, Texture, Instance, InstanceRaw
+};
+use cgmath::prelude::*;
+use wgpu::util::DeviceExt;
+use winit::{
+    event::{ElementState, KeyboardInput, VirtualKeyCode, WindowEvent},
+    window::Window,
+};
+
+const VERTICES: &[Vertex] = &[
+    Vertex {
+        position: [-0.0868241, 0.49240386, 0.0],
+        tex_coords: [0.4131759, 0.00759614],
+    }, // A
+    Vertex {
+        position: [-0.49513406, 0.06958647, 0.0],
+        tex_coords: [0.0048659444, 0.43041354],
+    }, // B
+    Vertex {
+        position: [-0.21918549, -0.44939706, 0.0],
+        tex_coords: [0.28081453, 0.949397],
+    }, // C
+    Vertex {
+        position: [0.35966998, -0.3473291, 0.0],
+        tex_coords: [0.85967, 0.84732914],
+    }, // D
+    Vertex {
+        position: [0.44147372, 0.2347359, 0.0],
+        tex_coords: [0.9414737, 0.2652641],
+    }, // E
+];
+
+const INDICES: &[u16] = &[0, 1, 4, 1, 2, 4, 2, 3, 4];
+
+const NUM_INSTANCES_PER_ROW: u32 = 10;
+const INSTANCE_DISPLACEMENT: cgmath::Vector3<f32> = cgmath::Vector3::new(
+    NUM_INSTANCES_PER_ROW as f32 * 0.5,
+    0.0,
+    NUM_INSTANCES_PER_ROW as f32 * 0.5,
+);
+
+const FRAME_TIME: f32 = 1.0 / 60.0;
+const ROTATION_SPEED: f32 = std::f32::consts::PI * FRAME_TIME * 0.5;
+
+pub struct State {
+    pub surface: wgpu::Surface,
+    pub device: wgpu::Device,
+    pub queue: wgpu::Queue,
+    pub config: wgpu::SurfaceConfiguration,
+    pub size: winit::dpi::PhysicalSize<u32>,
+    render_pipeline: wgpu::RenderPipeline,
+    vertex_buffer: wgpu::Buffer,
+    camera: Camera,
+    camera_uniform: CameraUniform,
+    camera_buffer: wgpu::Buffer,
+    camera_bind_group: wgpu::BindGroup,
+    camera_controller: CameraController,
+    instances: Vec<Instance>,
+    instance_buffer: wgpu::Buffer,
+    // num_vertices: u32,
+    index_buffer: wgpu::Buffer,
+    num_indices: u32,
+    diffuse_bind_group_pikachu: wgpu::BindGroup,
+    #[allow(dead_code)]
+    diffuse_texture_pikachu: Texture,
+    diffuse_bind_group: wgpu::BindGroup,
+    #[allow(dead_code)]
+    diffuse_texture: Texture,
+    depth_texture: Texture,
+    toggle: bool,
+}
+
+impl State {
+    // Creating some of the wgpu types requires async code
+    pub async fn new(window: &Window) -> Self {
+        let size = window.inner_size();
+
+        // The instance is a handle to our GPU
+        // Backends::all => Vulkan + Metal + DX12 + Browser WebGPU
+        let instance = wgpu::Instance::new(wgpu::Backends::all());
+        let surface = unsafe { instance.create_surface(window) };
+        let adapter = instance
+            .request_adapter(&wgpu::RequestAdapterOptions {
+                power_preference: wgpu::PowerPreference::default(),
+                compatible_surface: Some(&surface),
+                force_fallback_adapter: false,
+            })
+            .await
+            .unwrap();
+
+        // let adapter = instance
+        //     .enumerate_adapters(wgpu::Backends::all())
+        //     .filter(|adapter| {
+        //         // Check if this adapter supports our surface
+        //         surface.get_preferred_format(&adapter).is_some()
+        //     })
+        //     .next()
+        //     .unwrap();
+
+        let (device, queue) = adapter
+            .request_device(
+                &wgpu::DeviceDescriptor {
+                    features: wgpu::Features::empty(),
+                    // WebGL doesn't support all of wgpu's features, so if
+                    // we're building for the web we'll have to disable some.
+                    limits: if cfg!(target_arch = "wasm32") {
+                        wgpu::Limits::downlevel_webgl2_defaults()
+                    } else {
+                        wgpu::Limits::default()
+                    },
+                    label: None,
+                },
+                None, // Trace path
+            )
+            .await
+            .unwrap();
+
+        let config = wgpu::SurfaceConfiguration {
+            usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
+            format: surface.get_preferred_format(&adapter).unwrap(),
+            width: size.width,
+            height: size.height,
+            present_mode: wgpu::PresentMode::Fifo,
+        };
+        surface.configure(&device, &config);
+
+        // Binding des textures
+        let texture_bind_group_layout =
+            device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
+                entries: &[
+                    wgpu::BindGroupLayoutEntry {
+                        binding: 0,
+                        visibility: wgpu::ShaderStages::FRAGMENT,
+                        ty: wgpu::BindingType::Texture {
+                            multisampled: false,
+                            view_dimension: wgpu::TextureViewDimension::D2,
+                            sample_type: wgpu::TextureSampleType::Float { filterable: true },
+                        },
+                        count: None,
+                    },
+                    wgpu::BindGroupLayoutEntry {
+                        binding: 1,
+                        visibility: wgpu::ShaderStages::FRAGMENT,
+                        ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
+                        count: None,
+                    },
+                ],
+                label: Some("texture_bind_group_layout"),
+            });
+
+        let diffuse_bytes = include_bytes!("happy-tree.png");
+        let diffuse_texture =
+            Texture::from_bytes(&device, &queue, diffuse_bytes, "happy-tree.png")
+                .unwrap();
+
+        let diffuse_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
+            layout: &texture_bind_group_layout,
+            entries: &[
+                wgpu::BindGroupEntry {
+                    binding: 0,
+                    resource: wgpu::BindingResource::TextureView(&diffuse_texture.view),
+                },
+                wgpu::BindGroupEntry {
+                    binding: 1,
+                    resource: wgpu::BindingResource::Sampler(&diffuse_texture.sampler),
+                },
+            ],
+            label: Some("diffuse_bind_group"),
+        });
+
+        let diffuse_bytes_pikachu = include_bytes!("pikachu.png");
+        let diffuse_texture_pikachu = Texture::from_bytes(
+            &device,
+            &queue,
+            diffuse_bytes_pikachu,
+            "pikachu.png",
+        )
+        .unwrap();
+
+        let diffuse_bind_group_pikachu = device.create_bind_group(&wgpu::BindGroupDescriptor {
+            layout: &texture_bind_group_layout,
+            entries: &[
+                wgpu::BindGroupEntry {
+                    binding: 0,
+                    resource: wgpu::BindingResource::TextureView(&diffuse_texture_pikachu.view),
+                },
+                wgpu::BindGroupEntry {
+                    binding: 1,
+                    resource: wgpu::BindingResource::Sampler(&diffuse_texture_pikachu.sampler),
+                },
+            ],
+            label: Some("diffuse_bind_group"),
+        });
+        // FIN Binding des textures
+
+        let shader = device.create_shader_module(&wgpu::ShaderModuleDescriptor {
+            label: Some("Shader"),
+            source: wgpu::ShaderSource::Wgsl(include_str!("shader.wgsl").into()),
+        });
+
+        let camera = Camera {
+            // position the camera one unit up and 2 units back
+            // +z is out of the screen
+            eye: (0.0, 1.0, 2.0).into(),
+            // have it look at the origin
+            target: (0.0, 0.0, 0.0).into(),
+            // which way is "up"
+            up: cgmath::Vector3::unit_y(),
+            aspect: config.width as f32 / config.height as f32,
+            fovy: 45.0,
+            znear: 0.1,
+            zfar: 100.0,
+        };
+
+        let mut camera_uniform = CameraUniform::new();
+        camera_uniform.update_view_proj(&camera);
+
+        let camera_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Camera Buffer"),
+            contents: bytemuck::cast_slice(&[camera_uniform]),
+            usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
+        });
+
+        let camera_bind_group_layout =
+            device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
+                entries: &[wgpu::BindGroupLayoutEntry {
+                    binding: 0,
+                    visibility: wgpu::ShaderStages::VERTEX,
+                    ty: wgpu::BindingType::Buffer {
+                        ty: wgpu::BufferBindingType::Uniform,
+                        has_dynamic_offset: false,
+                        min_binding_size: None,
+                    },
+                    count: None,
+                }],
+                label: Some("camera_bind_group_layout"),
+            });
+
+        let camera_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
+            layout: &camera_bind_group_layout,
+            entries: &[wgpu::BindGroupEntry {
+                binding: 0,
+                resource: camera_buffer.as_entire_binding(),
+            }],
+            label: Some("camera_bind_group"),
+        });
+
+        let camera_controller = CameraController::new(0.2);
+
+        let instances = (0..NUM_INSTANCES_PER_ROW)
+            .flat_map(|z| {
+                (0..NUM_INSTANCES_PER_ROW).map(move |x| {
+                    let position = cgmath::Vector3 {
+                        x: x as f32,
+                        y: 0.0,
+                        z: z as f32,
+                    } - INSTANCE_DISPLACEMENT;
+
+                    let rotation = if position.is_zero() {
+                        // this is needed so an object at (0, 0, 0) won't get scaled to zero
+                        // as Quaternions can effect scale if they're not created correctly
+                        cgmath::Quaternion::from_axis_angle(
+                            cgmath::Vector3::unit_z(),
+                            cgmath::Deg(0.0),
+                        )
+                    } else {
+                        cgmath::Quaternion::from_axis_angle(position.normalize(), cgmath::Deg(45.0))
+                    };
+
+                    Instance { position, rotation }
+                })
+            })
+            .collect::<Vec<_>>();
+
+        let instance_data = instances
+            .iter()
+            .map(Instance::to_raw)
+            .collect::<Vec<_>>();
+        let instance_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Instance Buffer"),
+            contents: bytemuck::cast_slice(&instance_data),
+            usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
+        });
+
+        let depth_texture =
+            Texture::create_depth_texture(&device, &config, "depth_texture");
+
+        let render_pipeline_layout =
+            device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+                label: Some("Render Pipeline Layout"),
+                bind_group_layouts: &[&texture_bind_group_layout, &camera_bind_group_layout],
+                push_constant_ranges: &[],
+            });
+
+        let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+            label: Some("Render Pipeline"),
+            layout: Some(&render_pipeline_layout),
+            vertex: wgpu::VertexState {
+                module: &shader,
+                entry_point: "vs_main",
+                buffers: &[Vertex::desc(), InstanceRaw::desc()],
+            },
+            fragment: Some(wgpu::FragmentState {
+                module: &shader,
+                entry_point: "fs_main",
+                targets: &[wgpu::ColorTargetState {
+                    format: config.format,
+                    blend: Some(wgpu::BlendState::REPLACE),
+                    write_mask: wgpu::ColorWrites::ALL,
+                }],
+            }),
+            primitive: wgpu::PrimitiveState {
+                topology: wgpu::PrimitiveTopology::TriangleList,
+                strip_index_format: None,
+                front_face: wgpu::FrontFace::Ccw,
+                cull_mode: Some(wgpu::Face::Back),
+                // Setting this to anything other than Fill requires Features::NON_FILL_POLYGON_MODE
+                polygon_mode: wgpu::PolygonMode::Fill,
+                // Requires Features::DEPTH_CLIP_CONTROL
+                unclipped_depth: false,
+                // Requires Features::CONSERVATIVE_RASTERIZATION
+                conservative: false,
+            },
+            depth_stencil: Some(wgpu::DepthStencilState {
+                format: Texture::DEPTH_FORMAT,
+                depth_write_enabled: true,
+                depth_compare: wgpu::CompareFunction::Less,
+                stencil: wgpu::StencilState::default(),
+                bias: wgpu::DepthBiasState::default(),
+            }),
+            multisample: wgpu::MultisampleState {
+                count: 1,
+                mask: !0,
+                alpha_to_coverage_enabled: false,
+            },
+            multiview: None,
+        });
+
+        let vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Vertex Buffer"),
+            contents: bytemuck::cast_slice(VERTICES),
+            usage: wgpu::BufferUsages::VERTEX,
+        });
+
+        // let num_vertices = VERTICES.len() as u32;
+
+        let index_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Index Buffer"),
+            contents: bytemuck::cast_slice(INDICES),
+            usage: wgpu::BufferUsages::INDEX,
+        });
+        let num_indices = INDICES.len() as u32;
+
+        Self {
+            surface,
+            device,
+            queue,
+            config,
+            size,
+            render_pipeline,
+            vertex_buffer,
+            camera,
+            camera_uniform,
+            camera_buffer,
+            camera_bind_group,
+            camera_controller,
+            // num_vertices,
+            index_buffer,
+            num_indices,
+            diffuse_bind_group,
+            diffuse_texture,
+            diffuse_bind_group_pikachu,
+            diffuse_texture_pikachu,
+            instances,
+            instance_buffer,
+            toggle: false,
+            depth_texture,
+        }
+    }
+
+    pub fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
+        if new_size.width > 0 && new_size.height > 0 {
+            self.size = new_size;
+            self.config.width = new_size.width;
+            self.config.height = new_size.height;
+            self.surface.configure(&self.device, &self.config);
+        }
+        self.depth_texture = Texture::create_depth_texture(
+            &self.device,
+            &self.config,
+            "depth_texture",
+        );
+    }
+
+    pub fn input(&mut self, event: &WindowEvent) -> bool {
+        match event {
+            WindowEvent::KeyboardInput {
+                input:
+                    KeyboardInput {
+                        state,
+                        virtual_keycode: Some(keycode),
+                        ..
+                    },
+                ..
+            } => {
+                let is_pressed = *state == ElementState::Pressed;
+                match keycode {
+                    VirtualKeyCode::Space => {
+                        self.toggle = is_pressed;
+                        true
+                    }
+                    _ => self.camera_controller.process_events(event),
+                }
+            }
+            _ => self.camera_controller.process_events(event),
+        }
+    }
+
+    pub fn update(&mut self) {
+        self.camera_controller.update_camera(&mut self.camera);
+        self.camera_uniform.update_view_proj(&self.camera);
+        self.queue.write_buffer(
+            &self.camera_buffer,
+            0,
+            bytemuck::cast_slice(&[self.camera_uniform]),
+        );
+
+        for instance in &mut self.instances {
+            let amount = cgmath::Quaternion::from_angle_y(cgmath::Rad(ROTATION_SPEED));
+            let current = instance.rotation;
+            instance.rotation = amount * current;
+        }
+        let instance_data = self
+            .instances
+            .iter()
+            .map(Instance::to_raw)
+            .collect::<Vec<_>>();
+        self.queue.write_buffer(
+            &self.instance_buffer,
+            0,
+            bytemuck::cast_slice(&instance_data),
+        );
+    }
+
+    pub fn render(&mut self) -> Result<(), wgpu::SurfaceError> {
+        let output = self.surface.get_current_texture()?;
+        let view = output
+            .texture
+            .create_view(&wgpu::TextureViewDescriptor::default());
+        let mut encoder = self
+            .device
+            .create_command_encoder(&wgpu::CommandEncoderDescriptor {
+                label: Some("Render Encoder"),
+            });
+
+        {
+            let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+                label: Some("Render Pass"),
+                color_attachments: &[
+                    // This is what [[location(0)]] in the fragment shader targets
+                    wgpu::RenderPassColorAttachment {
+                        view: &view,
+                        resolve_target: None,
+                        ops: wgpu::Operations {
+                            load: wgpu::LoadOp::Clear(wgpu::Color {
+                                r: 0.1,
+                                g: 0.2,
+                                b: 0.3,
+                                a: 1.0,
+                            }),
+                            store: true,
+                        },
+                    },
+                ],
+                depth_stencil_attachment: Some(wgpu::RenderPassDepthStencilAttachment {
+                    view: &self.depth_texture.view,
+                    depth_ops: Some(wgpu::Operations {
+                        load: wgpu::LoadOp::Clear(1.0),
+                        store: true,
+                    }),
+                    stencil_ops: None,
+                }),
+            });
+
+            render_pass.set_pipeline(&self.render_pipeline);
+
+            if self.toggle {
+                render_pass.set_bind_group(0, &self.diffuse_bind_group_pikachu, &[]);
+            } else {
+                render_pass.set_bind_group(0, &self.diffuse_bind_group, &[]);
+            }
+            render_pass.set_bind_group(1, &self.camera_bind_group, &[]);
+            render_pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
+            render_pass.set_vertex_buffer(1, self.instance_buffer.slice(..));
+            render_pass.set_index_buffer(self.index_buffer.slice(..), wgpu::IndexFormat::Uint16);
+            // render_pass.draw(0..self.num_vertices, 0..1);
+            render_pass.draw_indexed(0..self.num_indices, 0, 0..self.instances.len() as _);
+        }
+
+        // submit will accept anything that implements IntoIter
+        self.queue.submit(std::iter::once(encoder.finish()));
+        output.present();
+
+        Ok(())
+    }
+}