chunk rendering

src/camera.rs

@@ -1,5 +1,6 @@
-use glam::{Mat4, Vec3, Vec3A};
+use glam::{Mat4, Vec3};
 use shipyard::{Component, ViewMut, View, IntoIter, Workload, IntoWorkload};
+use std::f32::consts::PI;
 use crate::transform::Transform;
 
 #[derive(Component)]
@@ -11,6 +12,20 @@ pub struct Camera {
   pub z_near: f32,
   pub z_far: f32,
 }
+impl Camera {
+  pub fn new(fov: f32, z_near: f32, z_far: f32, up: Vec3) -> Self {
+    Self {
+      fov, z_near, z_far, up,
+      perspective_matrix: Mat4::default(),
+      view_matrix: Mat4::default(),
+    }
+  }
+}
+impl Default for Camera {
+  fn default() -> Self {
+    Self::new(PI / 3., 0.1, 1024., Vec3::Y)
+  }
+}
 
 pub fn compute_cameras() -> Workload {
   (
@@ -31,12 +46,11 @@ fn update_view_matrix(
 }
 
 fn update_perspective_matrix(
-  mut vm_camera: ViewMut<Camera>,
-  v_transform: View<Transform>
+  mut vm_camera: ViewMut<Camera>
 ) {
   //todo compute this on win resize!
   const ASPECT_RATIO: f32 = 9. / 16.;
-  for (camera, transform) in (&mut vm_camera, &v_transform).iter() {
+  for camera in (&mut vm_camera).iter() {
     camera.perspective_matrix = Mat4::perspective_rh_gl(
       camera.fov, 
       ASPECT_RATIO, 

src/main.rs

@@ -23,7 +23,7 @@ pub(crate) mod settings;
 pub(crate) mod state;
 pub(crate) mod camera;
 
-use rendering::{Renderer, RenderTarget, BackgroundColor, clear_background};
+use rendering::{Renderer, RenderTarget, BackgroundColor, clear_background, draw_world};
 use world::{ChunkStorage, ChunkMeshStorage, loading::update_loaded_world_around_player};
 use player::spawn_player;
 use prefabs::load_prefabs;
@@ -47,6 +47,7 @@ fn update() -> Workload {
 fn render() -> Workload {
   (
     clear_background,
+    draw_world,
   ).into_sequential_workload()
 }
 

src/player.rs

@@ -1,7 +1,9 @@
 use glam::Mat4;
 use shipyard::{Component, EntitiesViewMut, ViewMut};
-
-use crate::transform::Transform;
+use crate::{
+  transform::Transform,
+  camera::Camera,
+};
 
 #[derive(Component)]
 pub struct LocalPlayer;
@@ -13,19 +15,22 @@ pub fn spawn_player (
   mut entities: EntitiesViewMut,
   mut vm_player: ViewMut<Player>,
   mut vm_local_player: ViewMut<LocalPlayer>,
-  mut vm_transform: ViewMut<Transform>
+  mut vm_transform: ViewMut<Transform>,
+  mut vm_camera: ViewMut<Camera>,
 ) {
   log::info!("spawning player");
   entities.add_entity(
     (
       &mut vm_player,
       &mut vm_local_player,
-      &mut vm_transform
+      &mut vm_transform,
+      &mut vm_camera,
     ),
     (
       Player,
       LocalPlayer,
-      Transform(Mat4::default())
+      Transform(Mat4::default()),
+      Camera::default()
     )
   );
 }

src/prefabs.rs

@@ -51,10 +51,10 @@ impl AssetPaths for BlockTextures {
 }
 
 #[derive(Unique)]
-pub struct BlockTexturesPrefab(SrgbTexture2dArray);
+pub struct BlockTexturesPrefab(pub SrgbTexture2dArray);
 
 #[derive(Unique)]
-pub struct ChunkShaderPrefab(Program);
+pub struct ChunkShaderPrefab(pub Program);
 
 pub fn load_prefabs(world: &World) {
   let renderer = world.borrow::<NonSendSync<UniqueView<Renderer>>>().unwrap();

src/rendering.rs

@@ -1,13 +1,38 @@
-use shipyard::{Unique, NonSendSync, UniqueView, UniqueViewMut};
+use shipyard::{Unique, NonSendSync, UniqueView, UniqueViewMut, View, IntoIter};
 use glium::{
+  Display, Surface, uniform,
+  DrawParameters, 
+  uniforms::{
+    Sampler, 
+    SamplerBehavior, 
+    MinifySamplerFilter, 
+    MagnifySamplerFilter
+  },
+  draw_parameters::{
+    Depth,
+    DepthTest,
+    PolygonMode,
+    BackfaceCullingMode,
+  },
   glutin::{
     event_loop::EventLoop, 
     window::WindowBuilder, 
     ContextBuilder, GlProfile
-  },
-  Display, Surface,
+  }, 
 };
 use glam::Vec3;
+use crate::{
+  camera::Camera, 
+  prefabs::{
+    ChunkShaderPrefab,
+    BlockTexturesPrefab,
+  },
+  world::{
+    ChunkStorage, 
+    ChunkMeshStorage, 
+    chunk::CHUNK_SIZE,
+  },
+};
 
 #[derive(Unique)]
 pub struct RenderTarget(pub glium::Frame);
@@ -34,6 +59,55 @@ impl Renderer {
   }
 }
 
-pub fn clear_background(mut target: NonSendSync<UniqueViewMut<RenderTarget>>, color: UniqueView<BackgroundColor>) {
+pub fn clear_background(
+  mut target: NonSendSync<UniqueViewMut<RenderTarget>>, 
+  color: UniqueView<BackgroundColor>,
+) {
   target.0.clear_color_srgb_and_depth((color.0.x, color.0.y, color.0.z, 1.), 1.);
 }
+
+pub fn draw_world(
+  mut target: NonSendSync<UniqueViewMut<RenderTarget>>, 
+  chunks: UniqueView<ChunkStorage>,
+  meshes: NonSendSync<UniqueView<ChunkMeshStorage>>,
+  program: NonSendSync<UniqueView<ChunkShaderPrefab>>,
+  texture: NonSendSync<UniqueView<BlockTexturesPrefab>>,
+  camera: View<Camera>,
+) {
+  let camera = camera.iter().next().expect("No cameras in the scene");
+  let draw_parameters = DrawParameters {
+    depth: Depth {
+      test: DepthTest::IfLess,
+      write: true,
+      ..Default::default()
+    },
+    ..Default::default()
+  };
+  let texture_sampler = Sampler(&texture.0, SamplerBehavior {
+    minify_filter: MinifySamplerFilter::Linear,
+    magnify_filter: MagnifySamplerFilter::Nearest,
+    max_anisotropy: 8,
+    ..Default::default()
+  });
+  let view = camera.view_matrix.to_cols_array_2d();
+  let perspective = camera.perspective_matrix.to_cols_array_2d();
+
+  for (&position, chunk) in &chunks.chunks {
+    if let Some(key) = chunk.mesh_index {
+      let mesh = meshes.get(key).expect("Mesh index pointing to nothing");
+      let world_position = (position.as_vec3() * CHUNK_SIZE as f32).to_array();
+      target.0.draw(
+        &mesh.vertex_buffer,
+        &mesh.index_buffer,
+        &program.0,
+        &uniform! {
+          position_offset: world_position,
+          view: view,
+          perspective: perspective,
+          tex: texture_sampler
+        },
+        &draw_parameters
+      ).unwrap();
+    }
+  }
+}

src/world.rs

@@ -129,4 +129,7 @@ impl ChunkMeshStorage {
     self.meshes.remove(&key).context("Chunk doesn't exist")?;
     Ok(())
   }
+  pub fn get(&self, key: usize) -> Option<&ChunkMesh> {
+    self.meshes.get(&key)
+  }
 }