getting closer to a cube

meshes/cube.rs

@@ -1,53 +0,0 @@
-mod meshes {
-    use std::mem::size_of;
-
-    const CUBE_VERTEX_SIZE: usize = size_of::<f32>() * 10;
-    const CUBE_VERTEX_COUNT: usize = 36;
-    const CUBE_VERTEX_POS_OFFSET: usize = 0;
-    const CUBE_VERTEX_COLOR_OFFSET: usize = size_of::<f32>() * 4;
-    const CUBE_VERTEX_UV_OFFSET: usize = size_of::<f32>() * 8;
-    const CUBE_VERTICES: [f32; 24] = [
-        // float4 position, float4 color, float2 uv
-        1, -1, 1, 1,   1, 0, 1, 1,  0, 1,
-        -1, -1, 1, 1,  0, 0, 1, 1,  1, 1,
-        -1, -1, -1, 1, 0, 0, 0, 1,  1, 0,
-        1, -1, -1, 1,  1, 0, 0, 1,  0, 0,
-        1, -1, 1, 1,   1, 0, 1, 1,  0, 1,
-        -1, -1, -1, 1, 0, 0, 0, 1,  1, 0,
-
-        1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
-        1, -1, 1, 1,   1, 0, 1, 1,  1, 1,
-        1, -1, -1, 1,  1, 0, 0, 1,  1, 0,
-        1, 1, -1, 1,   1, 1, 0, 1,  0, 0,
-        1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
-        1, -1, -1, 1,  1, 0, 0, 1,  1, 0,
-
-        -1, 1, 1, 1,   0, 1, 1, 1,  0, 1,
-        1, 1, 1, 1,    1, 1, 1, 1,  1, 1,
-        1, 1, -1, 1,   1, 1, 0, 1,  1, 0,
-        -1, 1, -1, 1,  0, 1, 0, 1,  0, 0,
-        -1, 1, 1, 1,   0, 1, 1, 1,  0, 1,
-        1, 1, -1, 1,   1, 1, 0, 1,  1, 0,
-
-        -1, -1, 1, 1,  0, 0, 1, 1,  0, 1,
-        -1, 1, 1, 1,   0, 1, 1, 1,  1, 1,
-        -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
-        -1, -1, -1, 1, 0, 0, 0, 1,  0, 0,
-        -1, -1, 1, 1,  0, 0, 1, 1,  0, 1,
-        -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
-
-        1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
-        -1, 1, 1, 1,   0, 1, 1, 1,  1, 1,
-        -1, -1, 1, 1,  0, 0, 1, 1,  1, 0,
-        -1, -1, 1, 1,  0, 0, 1, 1,  1, 0,
-        1, -1, 1, 1,   1, 0, 1, 1,  0, 0,
-        1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
-
-        1, -1, -1, 1,  1, 0, 0, 1,  0, 1,
-        -1, -1, -1, 1, 0, 0, 0, 1,  1, 1,
-        -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
-        1, 1, -1, 1,   1, 1, 0, 1,  0, 0,
-        1, -1, -1, 1,  1, 0, 0, 1,  0, 1,
-        -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
-    ];
-}

shaders/cube.wgsl

@@ -0,0 +1,27 @@
+struct VertexOutput {
+    @location(0) color: vec3<f32>,
+    @builtin(position) position: vec4<f32>
+};
+
+struct Locals {
+    transform: mat4x4<f32>
+};
+
+@group(0) @binding(0)
+var r_locals: Locals;
+
+@vertex
+fn vs_main(
+    @location(0) position: vec4<f32>,
+    @location(1) color: vec3<f32>,
+) -> VertexOutput {
+    var out: VertexOutput;
+    out.color = color;
+    out.position = r_locals.transform * position;
+    return out;
+}
+
+@fragment
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    return vec4<f32>(in.color.r, in.color.g, in.color.b, 1.0);
+}

shaders/shader.wgsl

@@ -1,11 +0,0 @@
-@vertex
-fn vs_main(@builtin(vertex_index) in_vertex_index: u32) -> @builtin(position) vec4<f32> {
-    let x = f32(i32(in_vertex_index) - 1);
-    let y = f32(i32(in_vertex_index & 1u) * 2 - 1);
-    return vec4<f32>(x, y, 0.0, 1.0);
-}
-
-@fragment
-fn fs_main() -> @location(0) vec4<f32> {
-    return vec4<f32>(1.0, 0.0, 0.0, 1.0);
-}

src/cube.rs

@@ -0,0 +1,114 @@
+#[derive(Copy, Clone)]
+pub struct Vertex {
+    position: [f32; 4],
+    color: [f32; 3]
+}
+
+fn vertex(pos: [i8; 3], color: [i8; 3]) -> Vertex {
+    Vertex {
+        position: [pos[0] as f32, pos[1] as f32, pos[2] as f32, 1.0],
+        color: [color[0] as f32, color[1] as f32, color[2] as f32]
+    }
+}
+
+pub fn create_vertices() -> (Vec<Vertex>, Vec<u16>) {
+    let vertex_data = [
+        // top (0, 0, 1)
+        vertex([-1, -1, 1], [1, 0, 0]),
+        vertex([1, -1, 1],  [1, 0, 0]),
+        vertex([1, 1, 1],   [1, 0, 0]),
+        vertex([-1, 1, 1],  [1, 0, 0]),
+        // bottom (0, 0, -1)
+        vertex([-1, 1, -1], [0, 1, 0]),
+        vertex([1, 1, -1],  [0, 1, 0]),
+        vertex([1, -1, -1], [0, 1, 0]),
+        vertex([-1, -1, -1],[0, 1, 0]),
+        // right (1, 0, 0)
+        vertex([1, -1, -1], [0, 0, 1]),
+        vertex([1, 1, -1],  [0, 0, 1]),
+        vertex([1, 1, 1],   [0, 0, 1]),
+        vertex([1, -1, 1],  [0, 0, 1]),
+        // left (-1, 0, 0)
+        vertex([-1, -1, 1],  [1, 1, 1]),
+        vertex([-1, 1, 1],   [1, 1, 1]),
+        vertex([-1, 1, -1],  [1, 1, 1]),
+        vertex([-1, -1, -1], [1, 1, 1]),
+        // front (0, 1, 0)
+        vertex([1, 1, -1],  [1, 1, 0]),
+        vertex([-1, 1, -1], [1, 1, 0]),
+        vertex([-1, 1, 1],  [1, 1, 0]),
+        vertex([1, 1, 1],   [1, 1, 0]),
+        // back (0, -1, 0)
+        vertex([1, -1, 1],   [0, 0, 0]),
+        vertex([-1, -1, 1],  [0, 0, 0]),
+        vertex([-1, -1, -1], [0, 0, 0]),
+        vertex([1, -1, -1],  [0, 0, 0]),
+    ];
+
+    let index_data: &[u16] = &[
+        0, 1, 2, 2, 3, 0, // top
+        4, 5, 6, 6, 7, 4, // bottom
+        8, 9, 10, 10, 11, 8, // right
+        12, 13, 14, 14, 15, 12, // left
+        16, 17, 18, 18, 19, 16, // front
+        20, 21, 22, 22, 23, 20, // back
+    ];
+
+    (vertex_data.to_vec(), index_data.to_vec())
+}
+
+
+// OLD
+/*
+use std::mem::size_of;
+
+const CUBE_VERTEX_SIZE: usize = size_of::<f32>() * 10;
+const CUBE_VERTEX_COUNT: usize = 36;
+const CUBE_VERTEX_POS_OFFSET: usize = 0;
+const CUBE_VERTEX_COLOR_OFFSET: usize = size_of::<f32>() * 4;
+const CUBE_VERTEX_UV_OFFSET: usize = size_of::<f32>() * 8;
+const CUBE_VERTICES: [f32; 24] = [
+    // float4 position, float4 color, float2 uv
+    1, -1, 1, 1,   1, 0, 1, 1,  0, 1,
+    -1, -1, 1, 1,  0, 0, 1, 1,  1, 1,
+    -1, -1, -1, 1, 0, 0, 0, 1,  1, 0,
+    1, -1, -1, 1,  1, 0, 0, 1,  0, 0,
+    1, -1, 1, 1,   1, 0, 1, 1,  0, 1,
+    -1, -1, -1, 1, 0, 0, 0, 1,  1, 0,
+
+    1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
+    1, -1, 1, 1,   1, 0, 1, 1,  1, 1,
+    1, -1, -1, 1,  1, 0, 0, 1,  1, 0,
+    1, 1, -1, 1,   1, 1, 0, 1,  0, 0,
+    1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
+    1, -1, -1, 1,  1, 0, 0, 1,  1, 0,
+
+    -1, 1, 1, 1,   0, 1, 1, 1,  0, 1,
+    1, 1, 1, 1,    1, 1, 1, 1,  1, 1,
+    1, 1, -1, 1,   1, 1, 0, 1,  1, 0,
+    -1, 1, -1, 1,  0, 1, 0, 1,  0, 0,
+    -1, 1, 1, 1,   0, 1, 1, 1,  0, 1,
+    1, 1, -1, 1,   1, 1, 0, 1,  1, 0,
+
+    -1, -1, 1, 1,  0, 0, 1, 1,  0, 1,
+    -1, 1, 1, 1,   0, 1, 1, 1,  1, 1,
+    -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
+    -1, -1, -1, 1, 0, 0, 0, 1,  0, 0,
+    -1, -1, 1, 1,  0, 0, 1, 1,  0, 1,
+    -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
+
+    1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
+    -1, 1, 1, 1,   0, 1, 1, 1,  1, 1,
+    -1, -1, 1, 1,  0, 0, 1, 1,  1, 0,
+    -1, -1, 1, 1,  0, 0, 1, 1,  1, 0,
+    1, -1, 1, 1,   1, 0, 1, 1,  0, 0,
+    1, 1, 1, 1,    1, 1, 1, 1,  0, 1,
+
+    1, -1, -1, 1,  1, 0, 0, 1,  0, 1,
+    -1, -1, -1, 1, 0, 0, 0, 1,  1, 1,
+    -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
+    1, 1, -1, 1,   1, 1, 0, 1,  0, 0,
+    1, -1, -1, 1,  1, 0, 0, 1,  0, 1,
+    -1, 1, -1, 1,  0, 1, 0, 1,  1, 0,
+];
+*/

src/main.rs

@@ -1,11 +1,14 @@
 mod voxel;
+mod cube;
 
 use std::borrow::Cow;
+use wgpu::util::DeviceExt;
 use winit::{
     event::{Event, WindowEvent},
     event_loop::{ControlFlow, EventLoop},
     window::Window,
 };
+use std::mem;
 
 async fn run(event_loop: EventLoop<()>, window: Window) {
     let size = window.inner_size();
@@ -38,18 +41,78 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
         .await
         .expect("Failed to create device");
 
-    // Load the shaders from disk
+    let (vertex_data, index_data) = cube::create_vertices();
-    let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
+
+    let vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+        label: Some("Vertex Buffer"),
+        contents:  bytemuck::cast_slice(&vertex_data),
+        usage: wgpu::BufferUsages::VERTEX,
+    });
+
+    let index_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+        label: Some("Index Buffer"),
+        contents: bytemuck::cast_slice(&index_data),
+        usage: wgpu::BufferUsages::INDEX,
+    });
+
+    let vertex_size = mem::size_of::<cube::Vertex>();
+    let vertex_buffer = wgpu::VertexBufferLayout {
+        array_stride: vertex_size as wgpu::BufferAddress,
+        step_mode: wgpu::VertexStepMode::Vertex,
+        attributes: &[
+            wgpu::VertexAttribute {
+                format: wgpu::VertexFormat::Float32x4,
+                offset: 0,
+                shader_location: 0,
+            },
+            wgpu::VertexAttribute {
+                format: wgpu::VertexFormat::Float32x3,
+                offset: mem::size_of::<f32>() as u64 * 4,
+                shader_location: 1,
+            },
+        ],
+    };
+
+    let bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
         label: None,
-        source: wgpu::ShaderSource::Wgsl(Cow::Borrowed(include_str!("../shaders/shader.wgsl"))),
+        entries: &[
+            wgpu::BindGroupLayoutEntry {
+                binding: 0,
+                visibility: wgpu::ShaderStages::VERTEX,
+                ty: wgpu::BindingType::Buffer {
+                    ty: wgpu::BufferBindingType::Uniform,
+                    has_dynamic_offset: false,
+                    min_binding_size: wgpu::BufferSize::new(64),
+                },
+                count: None,
+            }
+        ],
     });
 
     let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
         label: None,
-        bind_group_layouts: &[],
+        bind_group_layouts: &[&bind_group_layout],
         push_constant_ranges: &[],
     });
 
+    // Create bind group
+    let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
+        layout: &bind_group_layout,
+        entries: &[
+            wgpu::BindGroupEntry {
+                binding: 0,
+                resource: uniform_buffer.as_entire_binding(),
+            }
+        ],
+        label: None,
+    });
+
+    // Load the shaders from disk
+    let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
+        label: None,
+        source: wgpu::ShaderSource::Wgsl(Cow::Borrowed(include_str!("../shaders/cube.wgsl"))),
+    });
+
     let swapchain_capabilities = surface.get_capabilities(&adapter);
     let swapchain_format = swapchain_capabilities.formats[0];
 
@@ -59,14 +122,17 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
         vertex: wgpu::VertexState {
             module: &shader,
             entry_point: "vs_main",
-            buffers: &[],
+            buffers: &[vertex_buffer],
         },
         fragment: Some(wgpu::FragmentState {
             module: &shader,
             entry_point: "fs_main",
             targets: &[Some(swapchain_format.into())],
         }),
-        primitive: wgpu::PrimitiveState::default(),
+        primitive: wgpu::PrimitiveState {
+            cull_mode: Some(wgpu::Face::Back),
+            ..Default::default()
+        },
         depth_stencil: None,
         multisample: wgpu::MultisampleState::default(),
         multiview: None,
@@ -126,7 +192,10 @@ async fn run(event_loop: EventLoop<()>, window: Window) {
                         depth_stencil_attachment: None,
                     });
                     rpass.set_pipeline(&render_pipeline);
-                    rpass.draw(0..3, 0..1);
+                    rpass.set_bind_group(0, &bind_group, &[]);
+                    rpass.set_index_buffer(index_buffer.slice(..), wgpu::IndexFormat::Uint16);
+                    rpass.set_vertex_buffer(0, vertex_buffer.slice(..));
+                    rpass.draw_indexed(0..index_data.len() as u32, 0, 0..1);
                 }
 
                 queue.submit(Some(encoder.finish()));

src/voxel.rs

@@ -3,7 +3,7 @@ struct Voxel {
     r: u8, g: u8, b: u8
 }
 
-const AIR_VOXEL: Voxel = Voxel { r: 0, g: 0, b: 0 };
+const AIR_VOXEL: Voxel = Voxel  { r: 0, g: 0, b: 0};
 
 struct VoxelMap {
     data: Vec<Voxel>,