Some changes, I need to find a better cube model tho...

Cargo.toml

@@ -11,3 +11,4 @@ env_logger = "0.10"
 strum = { version = "0.24", features = ["derive"] }
 glam = { version = "0.22", features = ["debug-glam-assert", "mint", "fast-math"] }
 hashbrown = "0.13"
+simdnoise = "3.1"

src/game/controller.rs

@@ -109,7 +109,7 @@ impl Default for Controls {
   fn default() -> Self {
     Self {
       inputs: Default::default(),
-      speed: 10.,
+      speed: 40.,
       sensitivity: 2.,
     }
   }

src/game/options.rs

@@ -5,7 +5,7 @@ pub struct GameOptions {
 impl Default for GameOptions {
   fn default() -> Self {
     Self {
-      render_distance: 8,
+      render_distance: 16,
     }
   }
 }

src/game/shaders/chunk.rs

@@ -23,7 +23,8 @@ pub const VERTEX_SHADER: &str = r#"
 
   void main() {
     mat4 modelview = view * model;
-    v_normal = transpose(inverse(mat3(modelview))) * normal;
+    //v_normal = transpose(inverse(mat3(modelview))) * normal;
+    v_normal = normal;
     v_uv = uv;
     gl_Position = perspective * modelview * vec4(position, 1.0);
   }
@@ -32,10 +33,12 @@ pub const FRAGMENT_SHADER: &str = r#"
   #version 150 core
 
   in vec2 v_uv;
+  in vec3 v_normal;
   out vec4 color;
   uniform sampler2D tex;
 
   void main() {
     color = texture(tex, v_uv);
+    color *= vec4(vec3(abs(v_normal.x) + .8 * abs(v_normal.y) + .6 * abs(v_normal.z)), 1.);
   }
 "#;

src/game/world.rs

@@ -26,7 +26,7 @@ const NEGATIVE_X_NEIGHBOR: usize = 1;
 const POSITIVE_Z_NEIGHBOR: usize = 2;
 const NEGATIVE_Z_NEIGHBOR: usize = 3;
 
-const MAX_TASKS: usize = 8;
+const MAX_TASKS: usize = 4;
 
 pub struct World {
   pub chunks: HashMap<IVec2, Chunk>,
@@ -68,7 +68,7 @@ impl World {
         write: true,
         ..Default::default()
       },
-      //backface_culling: glium::draw_parameters::BackfaceCullingMode::CullClockwise,
+      backface_culling: glium::draw_parameters::BackfaceCullingMode::CullCounterClockwise,
       ..Default::default()
     };
     for (&position, chunk) in &self.chunks {

src/game/world/chunk.rs

@@ -5,7 +5,7 @@ use crate::game::{
   shaders::chunk::Vertex as ChunkVertex
 };
 
-pub const CHUNK_SIZE: usize = 16;
+pub const CHUNK_SIZE: usize = 32;
 pub const CHUNK_HEIGHT: usize = 255;
 
 pub enum ChunkState {

src/game/world/thread.rs

@@ -28,8 +28,8 @@ impl WorldThreading {
     self.load_tasks.len() + self.mesh_tasks.len()
   }
   pub fn queue_load(&mut self, position: IVec2) {
-    let handle = thread::spawn(|| {
-      world_gen::generate_chunk()
+    let handle = thread::spawn(move || {
+      world_gen::generate_chunk(position, 0xdead_cafe)
     });
     if self.load_tasks.insert(position, Some(handle)).is_some() {
       log::warn!("load: discarded {}, reason: new task started", position);

src/game/world/thread/mesh_gen.rs

@@ -28,14 +28,14 @@ const CUBE_FACE_VERTICES: [[Vec3A; 4]; 6] = [
   [vec3a(0., 0., 1.), vec3a(0., 1., 1.), vec3a(0., 0., 0.), vec3a(0., 1., 0.)],
   [vec3a(1., 0., 0.), vec3a(1., 1., 0.), vec3a(1., 0., 1.), vec3a(1., 1., 1.)],
   [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.)]
+  [vec3a(0., 0., 1.), vec3a(0., 0., 0.), vec3a(1., 0., 1.), vec3a(1., 0., 0.)],
 ];
 pub const CUBE_FACE_NORMALS: [[f32; 3]; 6] = [
-  [0., 1., 0.],
-  [0., 0., -1.],
+  [0.,  1., 0.],
+  [0.,  0., -1.],
   [-1., 0., 0.],
-  [1., 0., 0.],
-  [0., 0., 1.],
+  [1.,  0., 0.],
+  [0.,  0., 1.],
   [0., -1., 0.]
 ];
 pub const CUBE_FACE_INDICES: [u32; 6] = [0, 1, 2, 2, 1, 3];
@@ -98,7 +98,8 @@ pub fn generate_mesh(position: IVec2, chunk_data: ChunkData, neighbors: [ChunkDa
     for y in 0..CHUNK_HEIGHT {
       for z in 0..CHUNK_SIZE {
         let coord = ivec3(x as i32, y as i32, z as i32);
-        if get_block(coord).descriptor().render.is_none() {
+        let descriptor = get_block(coord).descriptor();
+        if descriptor.render.is_none() {
           continue
         }
         for face in CubeFace::iter() {
@@ -110,11 +111,29 @@ pub fn generate_mesh(position: IVec2, chunk_data: ChunkData, neighbors: [ChunkDa
             get_block(facing_coord).descriptor().render.is_none()
           };
           if show {
+            let texures = descriptor.render.unwrap().1;
+            let texture_id = match face {
+              CubeFace::Top    => texures.top,
+              CubeFace::Front  => texures.front,
+              CubeFace::Left   => texures.left,
+              CubeFace::Right  => texures.right,
+              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(0., 0.),
-              vec2(0., 1.),
-              vec2(1., 0.),
-              vec2(1., 1.),
+              vec2(x1, y1),
+              vec2(x1, y2),
+              vec2(x2, y1),
+              vec2(x2, y2),
             ]);
           }
         }

src/game/world/thread/world_gen.rs

@@ -1,8 +1,35 @@
+use glam::IVec2;
+use simdnoise::NoiseBuilder;
 use crate::game::{
   world::chunk::{ChunkData, CHUNK_SIZE, CHUNK_HEIGHT}, 
   blocks::Block
 };
 
-pub fn generate_chunk() -> ChunkData {
-  Box::new([[[Block::Stone; CHUNK_SIZE]; CHUNK_HEIGHT]; CHUNK_SIZE])
+const TERRAIN_HEIGHT_MIN: f32 = 64.;
+const TERRAIN_HEIGHT_MAX: f32 = 80.;
+
+pub fn generate_chunk(position: IVec2, seed: u32) -> ChunkData {
+  let world_xz = position.as_vec2() * CHUNK_SIZE as f32;
+  let mut chunk = Box::new([[[Block::Air; CHUNK_SIZE]; CHUNK_HEIGHT]; CHUNK_SIZE]);
+
+  //generate noises
+  let height_noise = NoiseBuilder::ridge_2d_offset(world_xz.x, CHUNK_SIZE, world_xz.y, CHUNK_SIZE)
+    .with_freq(0.01)
+    .with_octaves(4)
+    .with_seed(seed as i32)
+    .generate_scaled(TERRAIN_HEIGHT_MIN, TERRAIN_HEIGHT_MAX);
+
+  //put everything together
+  for x in 0..CHUNK_SIZE {
+    for z in 0..CHUNK_SIZE {
+      let heightmap = height_noise[x + z * CHUNK_SIZE] as usize;
+      for y in 0..heightmap {
+        chunk[x][y][z] = Block::Dirt;
+      }
+      chunk[x][heightmap][z] = Block::Grass;
+    }
+  }
+
+  //return generated world
+  chunk
 }