Work-in-progress refactor

Cargo.toml

@@ -12,6 +12,7 @@ strum = { version = "0.24", features = ["derive"] }
 glam = { version = "0.22", features = ["debug-glam-assert", "mint", "fast-math"] }
 hashbrown = "0.13"
 simdnoise = "3.1"
+rayon = "1.6"
 
 [features]
 default = []

src/game/assets/textures.rs

@@ -1,5 +1,8 @@
-use std::{fs, io};
-use glium::texture::{RawImage2d, SrgbTexture2d};
+use std::{fs, io, path::PathBuf, sync::atomic::AtomicU16};
+use rayon::prelude::*;
+use glium::texture::{RawImage2d, SrgbTexture2d, SrgbTexture2dArray};
+
+//This code is terrible and has a alot of duplication
 
 fn load_png(file_path: &str, display: &glium::Display) -> SrgbTexture2d {
   log::info!("loading texture {}", file_path);
@@ -25,14 +28,53 @@ fn load_png(file_path: &str, display: &glium::Display) -> SrgbTexture2d {
   SrgbTexture2d::new(display, raw_image).unwrap()
 }
 
+fn load_png_array(file_paths: &[PathBuf], display: &glium::Display) -> SrgbTexture2dArray {
+  let counter = AtomicU16::new(0);
+  let raw_images: Vec<RawImage2d<u8>> = file_paths.par_iter().enumerate().map(|(_, file_path)| {
+    let counter = counter.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
+    log::info!("loading texture {}/{}: {}", counter, file_paths.len(), file_path.to_str().unwrap());
+
+    //Load file
+    let data = fs::read(file_path).expect("Failed to load texture");
+
+    //decode image data
+    let image_data = image::load(
+      io::Cursor::new(&data),
+      image::ImageFormat::Png
+    ).unwrap().to_rgba8();
+
+    //Create raw glium image
+    let image_dimensions = image_data.dimensions();
+    let raw_image = RawImage2d::from_raw_rgba_reversed(
+      &image_data.into_raw(), 
+      image_dimensions
+    );
+
+    raw_image
+  }).collect();
+  SrgbTexture2dArray::new(display, raw_images).unwrap()
+}
+
 pub struct Textures {
-  pub block_atlas: SrgbTexture2d
+  pub blocks: SrgbTexture2dArray
 }
 impl Textures {
   /// Load textures synchronously, one by one and upload them to the GPU
   pub fn load_sync(display: &glium::Display) -> Self {
     Self {
-      block_atlas: load_png("assets/spritesheet.png", display)
+      blocks: load_png_array(&[
+        "./assets/blocks/stone.png".into(),
+        "./assets/blocks/dirt.png".into(),
+        "./assets/blocks/grass.png".into(),
+        "./assets/blocks/grass_side.png".into(),
+        "./assets/blocks/sand.png".into(),
+        "./assets/blocks/bedrock.png".into(),
+        "./assets/blocks/tree.png".into(),
+        "./assets/blocks/tree_top.png".into(),
+        "./assets/blocks/leaf.png".into(),
+        "./assets/blocks/torch.png".into(),
+        "./assets/blocks/tall_grass.png".into(),
+      ], display)
     }
   }
 }

src/game/shaders/chunk.rs

@@ -5,43 +5,30 @@ pub struct Vertex {
   pub position: [f32; 3],
   pub normal: [f32; 3],
   pub uv: [f32; 2],
+  pub tex_index: u8,
 }
-implement_vertex!(Vertex, position, normal, uv);
+implement_vertex!(Vertex, position, normal, uv, tex_index);
 
-//TODO store vertex data in a more compact way
-pub const VERTEX_SHADER: &str = r#"
-  #version 150 core
+pub const VERTEX_SHADER: &str = include_str!("./glsl/chunk.vert");
+pub const FRAGMENT_SHADER: &str = include_str!("./glsl/chunk.frag");
 
-  in vec3 position;
-  in vec3 normal;
-  in vec2 uv;
-  out vec3 v_normal;
-  out vec2 v_uv;
-  uniform mat4 perspective;
-  uniform mat4 view;
-  uniform mat4 model;
+// pub const VERTEX_SHADER: &str = r#"
+//   #version 150 core
 
-  void main() {
-    mat4 modelview = view * model;
-    //v_normal = transpose(inverse(mat3(modelview))) * normal;
-    v_normal = normal;
-    v_uv = uv;
-    gl_Position = perspective * modelview * vec4(position, 1.0);
-  }
-"#;
-pub const FRAGMENT_SHADER: &str = r#"
-  #version 150 core
+//   in vec3 position;
+//   in vec3 normal;
+//   in vec2 uv;
+//   out vec3 v_normal;
+//   out vec2 v_uv;
+//   uniform mat4 perspective;
+//   uniform mat4 view;
+//   uniform mat4 model;
 
-  in vec2 v_uv;
-  in vec3 v_normal;
-  out vec4 color;
-  uniform sampler2D tex;
-
-  void main() {
-    // base color from texture
-    color = texture(tex, v_uv);
-
-    //basic lighting
-    color *= vec4(vec3(abs(v_normal.x) + .8 * abs(v_normal.y) + .6 * abs(v_normal.z)), 1.);
-  }
-"#;
+//   void main() {
+//     mat4 modelview = view * model;
+//     //v_normal = transpose(inverse(mat3(modelview))) * normal;
+//     v_normal = normal;
+//     v_uv = uv;
+//     gl_Position = perspective * modelview * vec4(position, 1.0);
+//   }
+// "#;

src/game/shaders/colored2d.rs

@@ -6,22 +6,5 @@ pub struct Vertex {
 }
 implement_vertex!(Vertex, position);
 
-pub const VERTEX_SHADER: &str = r#"
-  #version 150 core
-
-  in vec2 position;
-
-  void main() {
-    gl_Position = vec4(position, 0., 1.);
-  }
-"#;
-pub const FRAGMENT_SHADER: &str = r#"
-  #version 150 core
-
-  out vec4 color;
-  uniform vec4 u_color;
-
-  void main() {
-    color = u_color;
-  }
-"#;
+pub const VERTEX_SHADER: &str = include_str!("./glsl/colored2d.vert");
+pub const FRAGMENT_SHADER: &str = include_str!("./glsl/colored2d.frag");

src/game/shaders/glsl/chunk.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.);
+}

src/game/shaders/glsl/chunk.vert

@@ -0,0 +1,18 @@
+#version 150 core
+
+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 vec3 position_offset;
+uniform mat4 perspective;
+uniform mat4 view;
+
+void main() {
+  v_normal = normal;
+  v_tex_index = tex_index;
+  gl_Position = perspective * view * vec4(position, 1.0) * vec4(position_offset, 1.0);
+}

src/game/shaders/glsl/colored2d.frag

@@ -0,0 +1,8 @@
+#version 150 core
+
+out vec4 color;
+uniform vec4 u_color;
+
+void main() {
+  color = u_color;
+}

src/game/shaders/glsl/colored2d.vert

@@ -0,0 +1,7 @@
+#version 150 core
+
+in vec2 position;
+
+void main() {
+  gl_Position = vec4(position, 0., 1.);
+}

src/game/world.rs

@@ -95,7 +95,7 @@ impl World {
             ],
             view: view,
             perspective: perspective,
-            tex: Sampler(&assets.textures.block_atlas, sampler)
+            tex: Sampler(&assets.textures.blocks, sampler)
           }, 
           &draw_parameters
         ).unwrap();

src/game/world/thread/mesh_gen.rs

@@ -30,7 +30,7 @@ const CUBE_FACE_VERTICES: [[Vec3A; 4]; 6] = [
   [vec3a(1., 0., 1.), vec3a(1., 1., 1.), vec3a(0., 0., 1.), vec3a(0., 1., 1.)],
   [vec3a(0., 0., 1.), vec3a(0., 0., 0.), vec3a(1., 0., 1.), vec3a(1., 0., 0.)],
 ];
-pub const CUBE_FACE_NORMALS: [[f32; 3]; 6] = [
+const CUBE_FACE_NORMALS: [[f32; 3]; 6] = [
   [0.,  1., 0.],
   [0.,  0., -1.],
   [-1., 0., 0.],
@@ -38,7 +38,14 @@ pub const CUBE_FACE_NORMALS: [[f32; 3]; 6] = [
   [0.,  0., 1.],
   [0., -1., 0.]
 ];
-pub const CUBE_FACE_INDICES: [u32; 6] = [0, 1, 2, 2, 1, 3];
+const CUBE_FACE_INDICES: [u32; 6] = [0, 1, 2, 2, 1, 3];
+const UV_COORDS: [[f32; 2]; 4] = [
+  [0., 0.],
+  [0., 1.],
+  [1., 0.],
+  [1., 1.],
+];
+
 
 #[derive(Default)]
 struct MeshBuilder {
@@ -51,7 +58,7 @@ impl MeshBuilder {
     Self::default()
   }
 
-  pub fn add_face(&mut self, face: CubeFace, coord: IVec3, uvs: [Vec2; 4]) {
+  pub fn add_face(&mut self, face: CubeFace, coord: IVec3, texture: u8) {
     let coord = coord.as_vec3a();
     let face_index = face as usize;
     
@@ -63,7 +70,8 @@ impl MeshBuilder {
       self.vertex_buffer.push(Vertex {
         position: (coord + vert[i]).to_array(),
         normal: norm,
-        uv: uvs[i].to_array()
+        uv: UV_COORDS[i], 
+        tex_index: texture
       });
     }
 
@@ -112,7 +120,7 @@ pub fn generate_mesh(position: IVec2, chunk_data: ChunkData, neighbors: [ChunkDa
           };
           if show {
             let texures = descriptor.render.unwrap().1;
-            let texture_id = match face {
+            let texture_index = match face {
               CubeFace::Top    => texures.top,
               CubeFace::Front  => texures.front,
               CubeFace::Left   => texures.left,
@@ -120,22 +128,7 @@ pub fn generate_mesh(position: IVec2, chunk_data: ChunkData, neighbors: [ChunkDa
               CubeFace::Back   => texures.back,
               CubeFace::Bottom => texures.bottom,
             };
-            //TODO replace with a proper texture resolver (or calculate uvs in a shader!)
-            //this is temporary!
-            //also this can only resolve textures on the first row.
-
-            const TEX_WIDTH: f32 = 16. / 640.;
-            const TEX_HEIGHT: f32 = 16. / 404.;
-            let x1 = TEX_WIDTH * texture_id as f32;
-            let x2 = x1 + TEX_WIDTH as f32;
-            let y1 = 1. - TEX_HEIGHT;
-            let y2 = 1.;
-            builer.add_face(face, coord, [
-              vec2(x1, y1),
-              vec2(x1, y2),
-              vec2(x2, y1),
-              vec2(x2, y2),
-            ]);
+            builer.add_face(face, coord, texture_index);
           }
         }
       }