add trans rendering and crosshair

kubi-shared/src/block.rs

@@ -22,6 +22,7 @@ pub enum BlockTexture {
   Cobblestone,
   Planks,
   WaterSolid,
+  Water,
 }
 
 #[derive(Serialize, Deserialize, Clone, Copy, Debug, PartialEq, Eq, EnumIter, TryFromPrimitive)]
@@ -136,7 +137,7 @@ impl Block {
       },
       Self::Water => BlockDescriptor {
         name: "water",
-        render: RenderType::BinaryTransparency(CubeTexture::all(BlockTexture::WaterSolid)),
+        render: RenderType::TransBlock(CubeTexture::all(BlockTexture::Water)),
         collision: CollisionType::None,
         raycast_collision: true,
         drops: None,
@@ -217,6 +218,7 @@ pub enum CollisionType {
 pub enum RenderType {
   None,
   SolidBlock(CubeTexture),
+  TransBlock(CubeTexture),
   BinaryTransparency(CubeTexture),
   CrossShape(CrossTexture),
 }

kubi/shaders/world.frag

@@ -8,6 +8,7 @@ in vec2 v_uv;
 flat in uint v_tex_index;
 out vec4 color;
 uniform sampler2DArray tex;
+uniform bool discard_alpha;
 
 // vec4 alpha_drop(vec4 b, vec4 a) {
 //   if ((a.w < 1.) || (b.w < 1.)) {
@@ -20,10 +21,10 @@ void main() {
   // base color from texture
   color = texture(tex, vec3(v_uv, v_tex_index));
   // discard transparent pixels
-  if (color.w < 0.5) discard;
+  if (color.w < (discard_alpha ? 0.01 : 0.5)) discard;
   //basic "lighting"
   float light = abs(v_normal.x) + .8 * abs(v_normal.y) + .6 * abs(v_normal.z);
   color *= vec4(vec3(light), 1.);
   //discard alpha
-  color.w = 1.;
+  if (discard_alpha) color.w = 1.;
 }

kubi/src/lib.rs

@@ -15,12 +15,13 @@ use std::time::Instant;
 
 pub(crate) use kubi_shared::transform;
 
-mod ui {
-  pub(crate) mod loading_screen;
-  pub(crate) mod connecting_screen;
-  pub(crate) mod chat_ui;
-}
-pub(crate) use ui::{loading_screen, connecting_screen, chat_ui};
+mod ui;
+pub(crate) use ui::{
+  loading_screen,
+  connecting_screen,
+  chat_ui,
+  crosshair_ui,
+};
 
 pub(crate) mod rendering;
 pub(crate) mod world;
@@ -91,6 +92,7 @@ use filesystem::AssetManager;
 use client_physics::{init_client_physics, update_client_physics_late};
 use chat_ui::render_chat;
 use chat::init_chat_manager;
+use crosshair_ui::{init_crosshair_image, draw_crosshair};
 
 /// stuff required to init the renderer and other basic systems
 fn pre_startup() -> Workload {
@@ -116,6 +118,7 @@ fn startup() -> Workload {
     init_delta_time,
     init_client_physics,
     init_chat_manager,
+    init_crosshair_image,
   ).into_sequential_workload()
 }
 
@@ -151,6 +154,7 @@ fn update() -> Workload {
       update_block_placement,
       apply_queued_blocks,
       render_chat,
+      draw_crosshair,
     ).into_sequential_workload().run_if(is_ingame),
     update_networking_late.run_if(is_multiplayer),
     compute_cameras,

kubi/src/prefabs.rs

@@ -34,6 +34,7 @@ impl AssetPaths for BlockTexture {
       Self::Cobblestone   => "cobblestone.png",
       Self::Planks        => "planks.png",
       Self::WaterSolid    => "solid_water.png",
+      Self::Water         => "water.png",
     }
   }
 }

kubi/src/rendering/world.rs

@@ -54,7 +54,7 @@ pub fn draw_world(
   settings: UniqueView<GameSettings>
 ) {
   let camera = camera.iter().next().expect("No cameras in the scene");
-  let draw_parameters = DrawParameters {
+  let mut draw_parameters = DrawParameters {
     depth: Depth {
       test: DepthTest::IfLess,
       write: true,
@@ -75,6 +75,8 @@ pub fn draw_world(
   let view = camera.view_matrix.to_cols_array_2d();
   let perspective = camera.perspective_matrix.to_cols_array_2d();
 
+  let mut enqueue_trans = Vec::new();
+
   for (&position, chunk) in &chunks.chunks {
     if let Some(key) = chunk.mesh_index {
       let mesh = meshes.get(key).expect("Mesh index pointing to nothing");
@@ -107,8 +109,31 @@ pub fn draw_world(
         },
         &draw_parameters
       ).unwrap();
+
+      if mesh.trans_index_buffer.len() > 0 {
+        enqueue_trans.push((chunk, mesh));
       }
     }
+  }
+
+  draw_parameters.blend = Blend::alpha_blending();
+  draw_parameters.backface_culling = BackfaceCullingMode::CullingDisabled;
+
+  for (chunk, mesh) in enqueue_trans {
+    let world_position = chunk.position.as_vec3() * CHUNK_SIZE as f32;
+    target.0.draw(
+      &mesh.trans_vertex_buffer,
+      &mesh.trans_index_buffer,
+      &program.0,
+      &uniform! {
+        position_offset: world_position.to_array(),
+        view: view,
+        perspective: perspective,
+        tex: texture_sampler,
+      },
+      &draw_parameters
+    ).unwrap();
+  }
 }
 
 pub fn draw_current_chunk_border(

kubi/src/ui.rs

@@ -0,0 +1,4 @@
+pub(crate) mod loading_screen;
+pub(crate) mod connecting_screen;
+pub(crate) mod chat_ui;
+pub(crate) mod crosshair_ui;

kubi/src/ui/crosshair_ui.rs

@@ -0,0 +1,60 @@
+use std::f32::consts::PI;
+
+use glam::uvec2;
+use hui::{
+  draw::{ImageHandle, TextureFormat},
+  element::{container::Container, image::Image, transformer::ElementTransformExt, UiElementExt},
+  layout::Alignment,
+  size
+};
+use shipyard::{AllStoragesViewMut, IntoIter, NonSendSync, Unique, UniqueView, UniqueViewMut, View};
+use crate::{hui_integration::UiState, player::MainPlayer, rendering::WindowSize, world::raycast::LookingAtBlock};
+
+const CROSSHAIR_SIZE: usize = 9;
+const CROSSHAIR: &[u8] = &[
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00,
+];
+
+#[derive(Unique)]
+pub struct CrosshairImage(ImageHandle);
+
+pub fn init_crosshair_image(storages: AllStoragesViewMut) {
+  let mut ui = storages.borrow::<NonSendSync<UniqueViewMut<UiState>>>().unwrap();
+  let image = ui.hui.add_image(TextureFormat::Grayscale, CROSSHAIR, CROSSHAIR_SIZE);
+  storages.add_unique(CrosshairImage(image));
+}
+
+pub fn draw_crosshair(
+  mut ui: NonSendSync<UniqueViewMut<UiState>>,
+  crosshair: UniqueView<CrosshairImage>,
+  size: UniqueView<WindowSize>,
+  player: View<MainPlayer>,
+  raycast: View<LookingAtBlock>,
+) {
+  let mut cursor_active = false;
+  if let Some((_, raycast)) = (&player, &raycast).iter().next() {
+    cursor_active = raycast.0.is_some();
+  }
+
+  Container::default()
+    .with_size(size!(100%))
+    .with_align(Alignment::Center)
+    .with_children(|ui| {
+      Image::new(crosshair.0)
+        .with_color((1., 1., 1., 0.5))
+        .with_size(size!(18, 18))
+        .transform()
+        .scale(glam::Vec2::splat(if cursor_active { 1. } else { 0.66 }))
+        .rotate(if cursor_active { 0. } else { PI / 4. })
+        .add_child(ui);
+    })
+    .add_root(&mut ui.hui, uvec2(size.0.x & !1, size.0.y & !1).as_vec2());
+}

kubi/src/world/chunk.rs

@@ -17,6 +17,8 @@ impl ChunkData {
 pub struct ChunkMesh {
   pub vertex_buffer: VertexBuffer<ChunkVertex>,
   pub index_buffer: IndexBuffer<u32>,
+  pub trans_vertex_buffer: VertexBuffer<ChunkVertex>,
+  pub trans_index_buffer: IndexBuffer<u32>,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Default)]

kubi/src/world/loading.rs

@@ -220,7 +220,11 @@ fn process_completed_tasks(
         //increase ops counter
         ops += 1;
       },
-      ChunkTaskResponse::GeneratedMesh { position, vertices, indexes } => {
+      ChunkTaskResponse::GeneratedMesh {
+        position,
+        vertices, indices,
+        trans_vertices, trans_indices,
+      } => {
         //check if chunk exists
         let Some(chunk) = world.chunks.get_mut(&position) else {
           log::warn!("mesh discarded: chunk doesn't exist");
@@ -234,11 +238,12 @@ fn process_completed_tasks(
         }
 
         //apply the mesh
-        let vertex_buffer = VertexBuffer::immutable(&renderer.display, &vertices).unwrap();
-        let index_buffer = IndexBuffer::immutable(&renderer.display, PrimitiveType::TrianglesList, &indexes).unwrap();
+        //TODO: Skip if mesh is empty? (i.e. set to None)
         let mesh = ChunkMesh {
-          vertex_buffer,
-          index_buffer,
+          vertex_buffer: VertexBuffer::immutable(&renderer.display, &vertices).unwrap(),
+          index_buffer: IndexBuffer::immutable(&renderer.display, PrimitiveType::TrianglesList, &indices).unwrap(),
+          trans_vertex_buffer: VertexBuffer::immutable(&renderer.display, &trans_vertices).unwrap(),
+          trans_index_buffer: IndexBuffer::immutable(&renderer.display, PrimitiveType::TrianglesList, &trans_indices).unwrap(),
         };
         if let Some(index) = chunk.mesh_index {
           meshes.update(index, mesh).expect("Mesh update failed");

kubi/src/world/mesh.rs

@@ -1,6 +1,6 @@
 use glam::{IVec3, ivec3};
 use strum::IntoEnumIterator;
-use kubi_shared::block::{Block, RenderType};
+use kubi_shared::block::{Block, BlockTexture, RenderType};
 use crate::world::chunk::CHUNK_SIZE;
 use crate::rendering::world::ChunkVertex;
 
@@ -10,7 +10,10 @@ mod builder;
 use data::MeshGenData;
 use builder::{MeshBuilder, CubeFace, DiagonalFace};
 
-pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
+pub fn generate_mesh(data: MeshGenData) -> (
+  (Vec<ChunkVertex>, Vec<u32>),
+  (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]
@@ -30,6 +33,7 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
   };
 
   let mut builder = MeshBuilder::new();
+  let mut trans_builder = MeshBuilder::new();
 
   for x in 0..CHUNK_SIZE as i32 {
     for y in 0..CHUNK_SIZE as i32 {
@@ -39,7 +43,9 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
         let descriptor = block.descriptor();
         match descriptor.render {
           RenderType::None => continue,
-          RenderType::SolidBlock(textures) | RenderType::BinaryTransparency(textures) => {
+          RenderType::SolidBlock(textures) |
+          RenderType::BinaryTransparency(textures) |
+          RenderType::TransBlock(textures) => {
             for face in CubeFace::iter() {
               let facing_direction = face.normal();
               let facing_coord = coord + facing_direction;
@@ -47,10 +53,12 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
               let facing_descriptor = facing_block.descriptor();
               let face_obstructed = match descriptor.render {
                 RenderType::SolidBlock(_) => matches!(facing_descriptor.render, RenderType::SolidBlock(_)),
-                RenderType::BinaryTransparency(_) => {
+                RenderType::BinaryTransparency(_) |
+                RenderType::TransBlock(_) => {
                   match facing_descriptor.render {
                     RenderType::SolidBlock(_) => true,
-                    RenderType::BinaryTransparency(_) => block == facing_block,
+                    RenderType::BinaryTransparency(_) |
+                    RenderType::TransBlock(_) => block == facing_block,
                     _ => false,
                   }
                 },
@@ -65,7 +73,11 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
                   CubeFace::Back   => textures.back,
                   CubeFace::Bottom => textures.bottom,
                 };
-                builder.add_face(face, coord, face_texture as u8);
+                let cur_builder = match descriptor.render {
+                  RenderType::TransBlock(_) => &mut trans_builder,
+                  _ => &mut builder,
+                };
+                cur_builder.add_face(face, coord, face_texture as u8);
               }
             }
           },
@@ -88,5 +100,5 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
     }
   }
 
-  builder.finish()
+  (builder.finish(), trans_builder.finish())
 }

kubi/src/world/tasks.rs

@@ -29,7 +29,9 @@ pub enum ChunkTaskResponse {
   GeneratedMesh {
     position: IVec3,
     vertices: Vec<ChunkVertex>,
-    indexes: Vec<u32>
+    indices: Vec<u32>,
+    trans_vertices: Vec<ChunkVertex>,
+    trans_indices: Vec<u32>,
   },
 }
 
@@ -55,8 +57,15 @@ impl ChunkTaskManager {
     self.pool.spawn(move || {
       let _ = sender.send(match task {
         ChunkTask::GenerateMesh { position, data } => {
-          let (vertices, indexes) = generate_mesh(data);
-          ChunkTaskResponse::GeneratedMesh { position, vertices, indexes }
+          let (
+            (vertices, indices),
+            (trans_vertices, trans_indices),
+          ) = generate_mesh(data);
+          ChunkTaskResponse::GeneratedMesh {
+            position,
+            vertices, indices,
+            trans_vertices, trans_indices,
+          }
         },
         ChunkTask::LoadChunk { position, seed } => {
           let (chunk_data, queued) = generate_world(position, seed);