loader

crabs.txt

@@ -0,0 +1 @@
+sorry no crabs here

shaders/world.frag

@@ -0,0 +1,15 @@
+#version 150 core
+
+in vec3 v_normal;
+in vec2 v_uv;
+flat in uint v_tex_index;
+out vec4 color;
+uniform sampler2DArray tex;
+
+void main() {
+  // base color from texture
+  color = texture(tex, vec3(v_uv, v_tex_index));
+  //basic "lighting"
+  float light = abs(v_normal.x) + .8 * abs(v_normal.y) + .6 * abs(v_normal.z);
+  color *= vec4(vec3(light), 1.);
+}

shaders/world.vert

@@ -0,0 +1,25 @@
+#version 150 core
+
+//TODO pack this data:
+// uint position_normal_uv
+// XXYYZZNU
+// wehere Normal and Uv are enums
+// maybe somehow pack in tex index too
+
+in vec3 position;
+in vec3 normal;
+in vec2 uv;
+in uint tex_index;
+out vec2 v_uv;
+out vec3 v_normal;
+flat out uint v_tex_index;
+uniform vec2 position_offset;
+uniform mat4 perspective;
+uniform mat4 view;
+
+void main() {
+  v_normal = normal;
+  v_tex_index = tex_index;
+  v_uv = uv;
+  gl_Position = perspective * view * (vec4(position, 1.0) + vec4(position_offset.x, 0., position_offset.y, 0.));
+}

src/main.rs

@@ -62,6 +62,9 @@ fn main() {
     *control_flow = ControlFlow::Poll;
     match event {
       Event::WindowEvent { event, .. } => match event {
+        WindowEvent::Resized(size) => {
+          // todo ...
+        }
         WindowEvent::CloseRequested => {
           log::info!("exit requested");
           *control_flow = ControlFlow::Exit;

src/prefabs.rs

@@ -1,11 +1,15 @@
 use shipyard::{World, NonSendSync, UniqueView, Unique};
 use strum::{EnumIter, IntoEnumIterator};
-use rayon::prelude::*;
-use glium::{texture::{SrgbTexture2dArray, RawImage2d}, backend::Facade};
-use std::{fs::File, path::PathBuf, io::BufReader};
+use glium::{texture::{SrgbTexture2dArray, RawImage2d}, backend::Facade, Program};
 use crate::rendering::Rederer;
 
-trait AssetPaths {
+mod texture;
+mod shaders;
+
+use texture::load_texture2darray_prefab;
+use shaders::include_shader_prefab;
+
+pub trait AssetPaths {
   fn file_name(self) -> &'static str;
 }
 
@@ -46,43 +50,27 @@ impl AssetPaths for BlockTextures {
   }
 }
 
-fn load_texture2darray_prefab<T: AssetPaths + IntoEnumIterator, E: Facade>(directory: PathBuf, facade: &E) -> SrgbTexture2dArray {
-  //Load raw images
-  let tex_files: Vec<&'static str> = T::iter().map(|x| x.file_name()).collect();
-  let raw_images: Vec<RawImage2d<u8>> = tex_files.par_iter().map(|&file_name| {
-    log::info!("loading texture {}", file_name);
-    //Get path to the image and open the file
-    let reader = {
-      let path = directory.join(file_name);
-      BufReader::new(File::open(path).expect("Failed to open texture file"))
-    };
-    //Parse image data
-    let (image_data, dimensions) = {
-      let image =image::load(
-        reader,
-        image::ImageFormat::Png
-      ).unwrap().to_rgba8();
-      let dimensions = image.dimensions();
-      (image.into_raw(), dimensions)
-    };
-    //Create a glium RawImage
-    RawImage2d::from_raw_rgba_reversed(
-      &image_data, 
-      dimensions
-    )
-  }).collect();
-  log::info!("done loading texture files, uploading to the gpu");
-  //Upload images to the GPU
-  SrgbTexture2dArray::new(facade, raw_images)
-    .expect("Failed to upload texture array to GPU")
-}
+
 
 #[derive(Unique)]
 pub struct BlockTexturesPrefab(SrgbTexture2dArray);
 
+#[derive(Unique)]
+pub struct ChunkShaderPrefab(Program);
+
 pub fn load_prefabs(world: &World) {
   let renderer = world.borrow::<NonSendSync<UniqueView<Rederer>>>().unwrap();
   world.add_unique_non_send_sync(BlockTexturesPrefab(
-    load_texture2darray_prefab::<BlockTextures, _>("./assets/blocks/".into(), &renderer.display)
+    load_texture2darray_prefab::<BlockTextures, _>(
+      "./assets/blocks/".into(), 
+      &renderer.display
+    )
+  ));
+  world.add_unique_non_send_sync(ChunkShaderPrefab(
+    include_shader_prefab!(
+      "../shaders/world.vert",
+      "../shaders/world.frag",
+      &renderer.display
+    )
   ));
 }

src/prefabs/shaders.rs

@@ -0,0 +1,29 @@
+use glium::{Program, backend::Facade};
+
+macro_rules! include_shader_prefab {
+  ($vert: literal, $frag: literal, $geom: literal, $facade: expr) => {
+    { 
+      log::info!("↓↓↓ compiling shader prefab ↓↓↓");
+      log::info!("{} {} {}", $vert, $frag, $geom);
+      Program::from_source(
+        &*$facade,
+        include_str!($vert),
+        include_str!($frag),
+        Some(include_str!($geom)),
+      ).expect("Failed to compile gpu program")
+    }
+  };
+  ($vert: literal, $frag: literal, $facade: expr) => {
+    {
+      log::info!("↓↓↓ compiling shader prefab ↓↓↓");
+      log::info!("{} {}", $vert, $frag);
+      Program::from_source(
+        &*$facade,
+        include_str!($vert),
+        include_str!($frag),
+        None,
+      ).expect("Failed to compile gpu program")
+    }
+  };
+}
+pub(crate) use include_shader_prefab;

src/prefabs/texture.rs

@@ -0,0 +1,40 @@
+use strum::IntoEnumIterator;
+use rayon::prelude::*;
+use std::{fs::File, path::PathBuf, io::BufReader};
+use glium::{texture::{SrgbTexture2dArray, RawImage2d}, backend::Facade};
+use super::AssetPaths;
+
+pub fn load_texture2darray_prefab<T: AssetPaths + IntoEnumIterator, E: Facade>(
+  directory: PathBuf, 
+  facade: &E
+) -> SrgbTexture2dArray {
+  log::info!("↓↓↓ loading textures {} ↓↓↓", directory.as_os_str().to_str().unwrap());
+  //Load raw images
+  let tex_files: Vec<&'static str> = T::iter().map(|x| x.file_name()).collect();
+  let raw_images: Vec<RawImage2d<u8>> = tex_files.par_iter().map(|&file_name| {
+    log::info!("loading texture {}", file_name);
+    //Get path to the image and open the file
+    let reader = {
+      let path = directory.join(file_name);
+      BufReader::new(File::open(path).expect("Failed to open texture file"))
+    };
+    //Parse image data
+    let (image_data, dimensions) = {
+      let image =image::load(
+        reader,
+        image::ImageFormat::Png
+      ).unwrap().to_rgba8();
+      let dimensions = image.dimensions();
+      (image.into_raw(), dimensions)
+    };
+    //Create a glium RawImage
+    RawImage2d::from_raw_rgba_reversed(
+      &image_data, 
+      dimensions
+    )
+  }).collect();
+  log::info!("done loading texture files, uploading to the gpu");
+  //Upload images to the GPU
+  SrgbTexture2dArray::new(facade, raw_images)
+    .expect("Failed to upload texture array to GPU")
+}

src/world.rs

@@ -3,6 +3,7 @@ use hashbrown::HashMap;
 
 pub mod chunk;
 pub mod block;
+pub mod render;
 
 use chunk::Chunk;
 

src/world/chunk.rs

@@ -1,6 +1,6 @@
 use glam::IVec3;
 use glium::{VertexBuffer, IndexBuffer};
-use super::block::Block;
+use super::{block::Block, render::ChunkVertex};
 
 pub const CHUNK_SIZE: usize = 32;
 

src/world/render.rs

@@ -0,0 +1,10 @@
+use glium::implement_vertex;
+
+#[derive(Clone, Copy)]
+pub struct ChunkVertex {
+  pub position: [f32; 3],
+  pub normal: [f32; 3],
+  pub uv: [f32; 2],
+  pub tex_index: u8,
+}
+implement_vertex!(ChunkVertex, position, normal, uv, tex_index);