add tall grass

Cargo.lock

@@ -948,6 +948,8 @@ dependencies = [
  "bincode",
  "bracket-noise",
  "glam",
+ "rand",
+ "rand_xoshiro",
  "shipyard",
  "strum",
 ]
@@ -986,6 +988,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "libm"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fc7aa29613bd6a620df431842069224d8bc9011086b1db4c0e0cd47fa03ec9a"
+
 [[package]]
 name = "libudev-sys"
 version = "0.1.4"
@@ -1310,6 +1318,16 @@ dependencies = [
  "shared_library",
 ]
 
+[[package]]
+name = "packed_simd_2"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1914cd452d8fccd6f9db48147b29fd4ae05bea9dc5d9ad578509f72415de282"
+dependencies = [
+ "cfg-if",
+ "libm",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
@@ -1377,6 +1395,12 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
 [[package]]
 name = "proc-macro-crate"
 version = "1.3.0"
@@ -1411,6 +1435,19 @@ version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
+ "libc",
+ "packed_simd_2",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
  "rand_core",
 ]
 
@@ -1419,6 +1456,9 @@ name = "rand_core"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
 
 [[package]]
 name = "rand_xorshift"
@@ -1429,6 +1469,15 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "rand_xoshiro"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f97cdb2a36ed4183de61b2f824cc45c9f1037f28afe0a322e9fff4c108b5aaa"
+dependencies = [
+ "rand_core",
+]
+
 [[package]]
 name = "raw-window-handle"
 version = "0.4.3"

kubi-shared/Cargo.toml

@@ -13,3 +13,9 @@ strum = { version = "0.24", features = ["derive"] }
 bincode = "2.0.0-rc"
 anyhow = "1.0"
 bracket-noise = "0.8"
+rand = { version = "0.8", default_features = false, features = ["std", "min_const_gen"] }
+rand_xoshiro = "0.6"
+
+[features]
+default = []
+nightly = ["rand/nightly", "rand/simd_support"]

kubi-shared/src/block.rs

@@ -128,23 +128,27 @@ impl CubeTexture {
 }
 
 #[derive(Clone, Copy, Debug)]
-pub struct CrossTexture {
-  pub a_front: BlockTexture,
-  pub a_back: BlockTexture,
-  pub b_front: BlockTexture,
-  pub b_back: BlockTexture,
+pub struct CrossTextureSides {
+  pub front: BlockTexture,
+  pub back: BlockTexture
 }
-impl CrossTexture {
-  pub const fn same_front_back(a: BlockTexture, b: BlockTexture) -> Self {
+impl CrossTextureSides {
+  pub const fn all(texture: BlockTexture) -> Self {
     Self {
-      a_front: a,
-      a_back: a,
-      b_front: b,
-      b_back: b,
+      front: texture,
+      back: texture
     }
   }
+}
+
+#[derive(Clone, Copy, Debug)]
+pub struct CrossTexture(pub CrossTextureSides, pub CrossTextureSides);
+impl CrossTexture {
   pub const fn all(texture: BlockTexture) -> Self {
-    Self::same_front_back(texture, texture)
+    Self(
+      CrossTextureSides::all(texture), 
+      CrossTextureSides::all(texture)
+    )
   }
 }
 

kubi-shared/src/worldgen.rs

@@ -1,5 +1,7 @@
-use glam::{IVec3, ivec3};
 use bracket_noise::prelude::*;
+use rand::prelude::*;
+use glam::{IVec3, ivec3};
+use rand_xoshiro::Xoshiro256StarStar;
 use crate::{
   chunk::{BlockData, CHUNK_SIZE},
   block::Block
@@ -41,6 +43,14 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> BlockData {
   elevation_noise.set_fractal_octaves(1);
   elevation_noise.set_frequency(0.001);
 
+  let mut rng = Xoshiro256StarStar::seed_from_u64(
+    seed
+    ^ ((chunk_position.x as u32 as u64) << 0)
+    ^ ((chunk_position.y as u32 as u64) << 16)
+    ^ ((chunk_position.z as u32 as u64) << 32)
+  );
+  let tall_grass_map: [[u8; CHUNK_SIZE]; CHUNK_SIZE] = rng.gen();
+
   // let mut cave_noise = FastNoise::seeded(seed.rotate_left(1));
   // cave_noise.set_fractal_type(FractalType::FBM);
   // cave_noise.set_fractal_octaves(2);
@@ -75,6 +85,12 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> BlockData {
       if let Some(y) = local_y_position(height, chunk_position) {
         blocks[x][y][z] = Block::Grass;
       }
+      //place tall grass
+      if tall_grass_map[x][z] < 10 {
+        if let Some(y) = local_y_position(height + 1, chunk_position) {
+          blocks[x][y][z] = Block::TallGrass;
+        }
+      }
     }
   }
   

kubi/Cargo.toml

@@ -26,4 +26,4 @@ winapi = { version = "0.3" }
 
 [features]
 default = []
-unstable = ["glam/core-simd"]
+nightly = ["glam/core-simd", "kubi-shared/nightly"]

kubi/src/world/mesh.rs

@@ -8,7 +8,7 @@ pub mod data;
 mod builder;
 
 use data::MeshGenData;
-use builder::{CubeFace, MeshBuilder};
+use builder::{MeshBuilder, CubeFace, DiagonalFace};
 
 pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
   let get_block = |pos: IVec3| -> Block {
@@ -58,9 +58,20 @@ pub fn generate_mesh(data: MeshGenData) -> (Vec<ChunkVertex>, Vec<u32>) {
               }
             }
           },
-          RenderType::CrossShape(_) => {
-            todo!()
-          }
+          RenderType::CrossShape(textures) => {
+            builder.add_diagonal_face(
+              coord, 
+              DiagonalFace::LeftZ, 
+              textures.0.front as u8, 
+              textures.0.back as u8
+            );
+            builder.add_diagonal_face(
+              coord, 
+              DiagonalFace::RigthZ, 
+              textures.1.front as u8, 
+              textures.1.back as u8
+            );
+          },
         }
       }
     }

kubi/src/world/mesh/builder.rs

@@ -2,14 +2,16 @@ use strum::EnumIter;
 use glam::{Vec3, vec3, IVec3, ivec3};
 use crate::rendering::world::ChunkVertex;
 
+const INV_SQRT_2: f32 = 0.70710678118655; // 1 / 2.sqrt()
+
 #[repr(usize)]
 #[derive(Clone, Copy, Debug, EnumIter)]
 pub enum CubeFace {
   Top    = 0,
-  Front  = 1,
+  Front  = 4,
   Left   = 2,
   Right  = 3,
-  Back   = 4,
+  Back   = 1,
   Bottom = 5,
 }
 impl CubeFace {
@@ -43,6 +45,40 @@ const CUBE_FACE_NORMALS: [Vec3; 6] = [
   vec3(0., -1.,0.)
 ];
 const CUBE_FACE_INDICES: [u32; 6] = [0, 1, 2, 2, 1, 3];
+
+#[repr(usize)]
+pub enum DiagonalFace {
+  RigthZ = 0,
+  LeftZ  = 1,
+}
+const CROSS_FACES: [[Vec3; 4]; 2] = [
+  [
+    vec3(0., 0., 0.), 
+    vec3(0., 1., 0.), 
+    vec3(1., 0., 1.), 
+    vec3(1., 1., 1.),
+  ],
+  [
+    vec3(0., 0., 1.), 
+    vec3(0., 1., 1.), 
+    vec3(1., 0., 0.), 
+    vec3(1., 1., 0.),
+  ]
+];
+const CROSS_FACE_NORMALS: [Vec3; 2] = [
+  vec3(-INV_SQRT_2, 0., INV_SQRT_2),
+  vec3(INV_SQRT_2, 0., INV_SQRT_2),
+];
+const CROSS_FACE_NORMALS_BACK: [Vec3; 2] = [
+  vec3(INV_SQRT_2, 0., -INV_SQRT_2),
+  vec3(-INV_SQRT_2, 0., -INV_SQRT_2),
+];
+const CROSS_FACE_INDICES: [u32; 12] = [
+  0, 1, 2, 2, 1, 3, //Front side
+  6, 5, 4, 7, 5, 6, //Back side
+];
+
+
 const UV_COORDS: [[f32; 2]; 4] = [
   [0., 0.],
   [0., 1.],
@@ -80,9 +116,61 @@ impl MeshBuilder {
 
     //Push indices
     self.index_buffer.extend_from_slice(&CUBE_FACE_INDICES.map(|x| x + self.idx_counter));
+
+    //Increment idx counter
     self.idx_counter += 4;
   }
 
+  pub fn add_diagonal_face(&mut self, coord: IVec3, face_type: DiagonalFace, front_texture: u8, back_texture: u8) {
+    //Push vertices
+    let face_type = face_type as usize;
+    let vertices = CROSS_FACES[face_type];
+    let normal_front = CROSS_FACE_NORMALS[face_type].to_array();
+    let normal_back = CROSS_FACE_NORMALS[face_type].to_array();
+    self.vertex_buffer.reserve(8);
+    for i in 0..4 { //push front vertices
+      self.vertex_buffer.push(ChunkVertex {
+        position: (coord.as_vec3() + vertices[i]).to_array(),
+        normal: normal_front,
+        uv: UV_COORDS[i],
+        tex_index: front_texture
+      })
+    }
+    for i in 0..4 { //push back vertices
+      self.vertex_buffer.push(ChunkVertex {
+        position: (coord.as_vec3() + vertices[i]).to_array(),
+        normal: normal_back,
+        uv: UV_COORDS[i],
+        tex_index: back_texture
+      })
+    }
+
+    //Push indices
+    self.index_buffer.extend_from_slice(&CROSS_FACE_INDICES.map(|x| x + self.idx_counter));
+
+    //Increment idx counter
+    self.idx_counter += 8; 
+  }
+
+  pub fn add_model(&mut self, position: Vec3, vertices: &[ChunkVertex], indices: Option<&[u32]>) {
+    //push vertices
+    self.vertex_buffer.extend(vertices.iter().map(|vertex| {
+      let mut vertex = *vertex;
+      vertex.position[0] += position.x;
+      vertex.position[0] += position.y;
+      vertex.position[0] += position.z;
+      vertex
+    }));
+    //push indices
+    if let Some(indices) = indices {
+      self.index_buffer.extend(indices.iter().map(|x| x + self.idx_counter));
+    } else {
+      self.index_buffer.extend(0..(self.vertex_buffer.len() as u32));
+    }
+    //increment idx counter
+    self.idx_counter += vertices.len() as u32;
+  }
+
   pub fn finish(self) -> (Vec<ChunkVertex>, Vec<u32>) {
     (self.vertex_buffer, self.index_buffer)
   }