got something to render...

shaders/world.vert

@@ -13,7 +13,7 @@ in uint tex_index;
 out vec2 v_uv;
 out vec3 v_normal;
 flat out uint v_tex_index;
-uniform vec2 position_offset;
+uniform vec3 position_offset;
 uniform mat4 perspective;
 uniform mat4 view;
 
@@ -21,5 +21,5 @@ 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.));
+  gl_Position = perspective * view * vec4(position + position_offset, 1.);
 }

src/camera.rs

@@ -49,7 +49,7 @@ fn update_perspective_matrix(
   mut vm_camera: ViewMut<Camera>
 ) {
   //todo compute this on win resize!
-  const ASPECT_RATIO: f32 = 9. / 16.;
+  const ASPECT_RATIO: f32 = 16. / 9.;
   for camera in (&mut vm_camera).iter() {
     camera.perspective_matrix = Mat4::perspective_rh_gl(
       camera.fov, 

src/settings.rs

@@ -8,7 +8,7 @@ pub struct GameSettings {
 impl Default for GameSettings {
   fn default() -> Self {
     Self {
-      render_distance: 5
+      render_distance: 2
     }
   }
 }

src/world/block.rs

@@ -1,6 +1,6 @@
 use strum::EnumIter;
 
-#[derive(Clone, Copy, Debug, EnumIter)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, EnumIter)]
 #[repr(u8)]
 pub enum Block {
   Air,

src/world/loading.rs

@@ -153,8 +153,8 @@ fn process_completed_tasks(
         };
 
         //check if chunk still wants it
-        if matches!(chunk.desired_state, DesiredChunkState::Loaded | DesiredChunkState::Rendered) {
-          log::warn!("block data discarded: state undesirable");
+        if !matches!(chunk.desired_state, DesiredChunkState::Loaded | DesiredChunkState::Rendered) {
+          log::warn!("block data discarded: state undesirable: {:?}", chunk.desired_state);
           return
         }
 
@@ -175,7 +175,7 @@ fn process_completed_tasks(
 
         //check if chunk still wants it
         if chunk.desired_state != DesiredChunkState::Rendered {
-          log::warn!("mesh discarded: state undesirable");
+          log::warn!("mesh discarded: state undesirable: {:?}", chunk.desired_state);
           return
         }
 

src/world/mesh.rs

@@ -1,5 +1,6 @@
 use strum::{EnumIter, IntoEnumIterator};
-use glam::{Vec3A, vec3a};
+use glam::{Vec3A, vec3a, IVec3, ivec3};
+use super::{render::ChunkVertex, chunk::CHUNK_SIZE, block::Block};
 
 pub mod data;
 use data::MeshGenData;
@@ -38,6 +39,95 @@ const UV_COORDS: [[f32; 2]; 4] = [
   [1., 1.],
 ];
 
-pub fn generate_mesh(data: MeshGenData) {
-  
+#[derive(Default)]
+struct MeshBuilder {
+  vertex_buffer: Vec<ChunkVertex>,
+  index_buffer: Vec<u32>,
+  idx_counter: u32,
+}
+impl MeshBuilder {
+  pub fn new() -> Self {
+    Self::default()
+  }
+
+  pub fn add_face(&mut self, face: CubeFace, coord: IVec3, texture: u8) {
+    let coord = coord.as_vec3a();
+    let face_index = face as usize;
+    
+    //Push vertexes
+    let norm = CUBE_FACE_NORMALS[face_index];
+    let vert = CUBE_FACE_VERTICES[face_index];
+    self.vertex_buffer.reserve(4);
+    for i in 0..4 {
+      self.vertex_buffer.push(ChunkVertex {
+        position: (coord + vert[i]).to_array(),
+        normal: norm.to_array(),
+        uv: UV_COORDS[i], 
+        tex_index: texture
+      });
+    }
+
+    //Push indices
+    self.index_buffer.extend_from_slice(&CUBE_FACE_INDICES.map(|x| x + self.idx_counter));
+    self.idx_counter += 4;
+  }
+
+  pub fn finish(self) -> (Vec<ChunkVertex>, Vec<u32>) {
+    (self.vertex_buffer, self.index_buffer)
+  }
+}
+
+pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
+  let get_block = |pos: IVec3| -> Block {
+    if pos.x < 0 {
+      data.block_data_neg_x[(CHUNK_SIZE as i32 + pos.x) as usize][pos.y as usize][pos.z as usize]
+    } else if pos.x >= CHUNK_SIZE as i32 {
+      data.block_data_pos_x[pos.x as usize - CHUNK_SIZE][pos.y as usize][pos.z as usize]
+    } else if pos.y < 0 {
+      data.block_data_neg_y[pos.x as usize][(CHUNK_SIZE as i32 + pos.y) as usize][pos.z as usize]
+    } else if pos.y >= CHUNK_SIZE as i32 {
+      data.block_data_pos_y[pos.x as usize][pos.y as usize - CHUNK_SIZE][pos.z as usize]
+    } else if pos.z < 0 {
+      data.block_data_neg_z[pos.x as usize][pos.y as usize][(CHUNK_SIZE as i32 + pos.z) as usize]
+    } else if pos.z >= CHUNK_SIZE as i32 {
+      data.block_data_pos_z[pos.x as usize][pos.y as usize][pos.z as usize - CHUNK_SIZE]
+    } else {
+      data.block_data[pos.x as usize][pos.y as usize][pos.z as usize]
+    }
+  };
+
+  let mut builder = MeshBuilder::new();
+
+  for x in 0..CHUNK_SIZE {
+    for y in 0..CHUNK_SIZE {
+      for z in 0..CHUNK_SIZE {
+        let coord = ivec3(x as i32, y as i32, z as i32);
+        let block = get_block(coord);
+        if block == Block::Air {
+          continue
+        }
+        for face in CubeFace::iter() {
+          let facing = CUBE_FACE_NORMALS[face as usize].as_ivec3();
+          let facing_coord = coord + facing;
+          let show = {
+            get_block(facing_coord) == Block::Air
+          };
+          if show {
+            // let texures = descriptor.render.unwrap().1;
+            // let block_texture = 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,
+            // };
+            builder.add_face(face, coord, 0);
+          }
+        }
+      }
+    }
+  }
+
+  builder.finish()
 }

src/world/tasks.rs

@@ -4,7 +4,7 @@ use shipyard::Unique;
 use super::{
   chunk::BlockData,
   render::ChunkVertex, 
-  mesh::data::MeshGenData,
+  mesh::{generate_mesh, data::MeshGenData},
   worldgen::generate_world,
 };
 
@@ -45,7 +45,8 @@ impl ChunkTaskManager {
     rayon::spawn(move || {
       let _ = sender.send(match task {
         ChunkTask::GenerateMesh { position, data } => {
-          todo!()
+          let (vertices, indexes) = generate_mesh(data);
+          ChunkTaskResponse::GeneratedMesh { position, vertices, indexes }
         },
         ChunkTask::LoadChunk { position, seed } => {
           let chunk_data = generate_world(position, seed);