organization and buidings db

engine/world_generation/src/generators/chunk_colliders.rs

@@ -0,0 +1,63 @@
+use crate::{hex_utils::*, prelude::*};
+#[cfg(feature = "tracing")]
+use bevy::log::*;
+use bevy::prelude::*;
+
+const CHUNK_TOTAL: usize = Chunk::SIZE * Chunk::SIZE;
+
+pub fn generate_chunk_collider(chunk: &MeshChunkData) -> (Vec<Vec3>, Vec<[u32; 3]>) {
+	#[cfg(feature = "tracing")]
+	let span = info_span!("generate_chunk_collider").entered();
+	let vertex_count: usize = CHUNK_TOTAL * 6;
+	let mut verts = Vec::with_capacity(vertex_count);
+	let mut indices = Vec::with_capacity(vertex_count);
+	for z in 0..Chunk::SIZE {
+		for x in 0..Chunk::SIZE {
+			let height = chunk.heights[x + z * Chunk::SIZE];
+			let coord = HexCoord::from_grid_pos(x, z);
+			let neighbors = chunk.get_neighbors(&coord);
+			let off_pos = Vec3::new(x as f32, height, z as f32);
+			let tile_pos = offset3d_to_world(off_pos);
+			create_tile_collider(tile_pos, &mut verts, &mut indices, &neighbors);
+		}
+	}
+	return (verts, indices);
+}
+
+fn create_tile_collider(pos: Vec3, verts: &mut Vec<Vec3>, indices: &mut Vec<[u32; 3]>, neighbors: &[f32; 6]) {
+	let idx = verts.len() as u32;
+	for i in 0..6 {
+		let p = pos + HEX_CORNERS[i];
+		verts.push(p);
+	}
+
+	//Top Surfave
+	indices.push([idx, idx + 1, idx + 5]);
+	indices.push([idx + 1, idx + 2, idx + 5]);
+	indices.push([idx + 2, idx + 4, idx + 5]);
+	indices.push([idx + 2, idx + 3, idx + 4]);
+
+	for i in 0..neighbors.len() {
+		let n_height = neighbors[i];
+		if n_height < pos.y {
+			create_tile_wall_collider(
+				idx,
+				Vec3::new(pos.x, n_height.min(pos.y - OUTER_RADIUS / 2.), pos.z),
+				i,
+				verts,
+				indices,
+			);
+		}
+	}
+}
+
+fn create_tile_wall_collider(idx: u32, pos: Vec3, dir: usize, verts: &mut Vec<Vec3>, indices: &mut Vec<[u32; 3]>) {
+	let idx2 = verts.len() as u32;
+
+	verts.push(pos + HEX_CORNERS[dir]);
+	verts.push(pos + HEX_CORNERS[(dir + 1) % 6]);
+
+	let off = dir as u32;
+	indices.push([idx + off, idx + ((off + 1) % 6), idx2 + 1]);
+	indices.push([idx + off, idx2 + 1, idx2]);
+}

engine/world_generation/src/generators/mesh_generator.rs

@@ -0,0 +1,137 @@
+use crate::hex_utils::HexCoord;
+use crate::{hex_utils::offset3d_to_world, prelude::*};
+#[cfg(feature = "tracing")]
+use bevy::log::*;
+use bevy::{
+	prelude::*,
+	render::{
+		mesh::{Indices, PrimitiveTopology},
+		render_asset::RenderAssetUsages,
+	},
+};
+
+pub fn generate_chunk_mesh(chunk: &MeshChunkData) -> Mesh {
+	#[cfg(feature = "tracing")]
+	let span = info_span!("generate_chunk_mesh").entered();
+
+	let vertex_count: usize = Chunk::SIZE * Chunk::SIZE * 6;
+	let mut verts = Vec::with_capacity(vertex_count);
+	let mut uvs = Vec::with_capacity(vertex_count);
+	let mut indices = Vec::with_capacity(vertex_count);
+	let mut normals = Vec::with_capacity(vertex_count);
+
+	for z in 0..Chunk::SIZE {
+		for x in 0..Chunk::SIZE {
+			let idx = x + z * Chunk::SIZE;
+			let height = chunk.heights[idx];
+			let off_pos = Vec3::new(x as f32, height, z as f32);
+			let tile_pos = offset3d_to_world(off_pos);
+			let coord = HexCoord::from_grid_pos(x, z);
+			let n = chunk.get_neighbors(&coord);
+
+			create_tile(
+				tile_pos,
+				&n,
+				&mut verts,
+				&mut uvs,
+				&mut indices,
+				&mut normals,
+				// &mut tex,
+				chunk.textures[idx][0],
+				chunk.textures[idx][1],
+			);
+		}
+	}
+
+	let mesh = Mesh::new(
+		PrimitiveTopology::TriangleList,
+		RenderAssetUsages::MAIN_WORLD | RenderAssetUsages::RENDER_WORLD,
+	)
+	.with_inserted_attribute(Mesh::ATTRIBUTE_POSITION, verts)
+	.with_inserted_attribute(Mesh::ATTRIBUTE_UV_0, uvs)
+	.with_inserted_attribute(Mesh::ATTRIBUTE_NORMAL, normals)
+	.with_inserted_indices(Indices::U32(indices));
+	return mesh;
+}
+
+fn create_tile(
+	pos: Vec3,
+	neighbors: &[f32; 6],
+	verts: &mut Vec<Vec3>,
+	uvs: &mut Vec<Vec2>,
+	indices: &mut Vec<u32>,
+	normals: &mut Vec<Vec3>,
+	texture_index: u32,
+	side_texture_index: u32,
+) {
+	let uv_offset = Vec2::splat(0.5);
+	let tex_off = Vec2::new(texture_index as f32, 0.);
+	let side_tex_off = Vec2::new(side_texture_index as f32, 0.);
+
+	let idx = verts.len() as u32;
+	for i in 0..6 {
+		let p = pos + HEX_CORNERS[i];
+		verts.push(p);
+		let uv = (HEX_CORNERS[i].xz() / 2.) + uv_offset;
+		uvs.push((uv / TEX_MULTI) + tex_off);
+		normals.push(Vec3::Y);
+	}
+	for i in 0..3 {
+		let off = i * 2;
+		indices.push(off + idx);
+		indices.push(((off + 1) % 6) + idx);
+		indices.push(((off + 2) % 6) + idx);
+	}
+	indices.push(idx);
+	indices.push(idx + 2);
+	indices.push(idx + 4);
+
+	for i in 0..neighbors.len() {
+		let n_height = neighbors[i];
+		if n_height < pos.y {
+			create_tile_wall(pos, i, n_height, verts, uvs, indices, normals, side_tex_off);
+		}
+	}
+}
+
+fn create_tile_wall(
+	pos: Vec3,
+	dir: usize,
+	height: f32,
+	verts: &mut Vec<Vec3>,
+	uvs: &mut Vec<Vec2>,
+	indices: &mut Vec<u32>,
+	normals: &mut Vec<Vec3>,
+	tex_off: Vec2,
+) {
+	let p1 = HEX_CORNERS[(dir) % 6] + pos;
+	let p2 = HEX_CORNERS[(dir + 1) % 6] + pos;
+	let p3 = Vec3::new(p1.x, height, p1.z);
+	let p4 = Vec3::new(p2.x, height, p2.z);
+
+	let idx = verts.len() as u32;
+
+	verts.push(p1);
+	verts.push(p2);
+	verts.push(p3);
+	verts.push(p4);
+
+	let n = HEX_NORMALS[dir];
+	normals.push(n);
+	normals.push(n);
+	normals.push(n);
+	normals.push(n);
+
+	indices.push(idx);
+	indices.push(idx + 2);
+	indices.push(idx + 1);
+
+	indices.push(idx + 1);
+	indices.push(idx + 2);
+	indices.push(idx + 3);
+
+	uvs.push(Vec2::ZERO + tex_off);
+	uvs.push((Vec2::new(1., 0.) / TEX_MULTI) + tex_off);
+	uvs.push((Vec2::new(0., pos.y - height) / TEX_MULTI) + tex_off);
+	uvs.push((Vec2::new(1., pos.y - height) / TEX_MULTI) + tex_off);
+}

engine/world_generation/src/generators/mod.rs

@@ -0,0 +1,3 @@
+pub mod chunk_colliders;
+pub mod mesh_generator;
+pub mod packed_mesh_generator;

engine/world_generation/src/generators/packed_mesh_generator.rs

@@ -0,0 +1,147 @@
+use crate::biome_painter::BiomePainterAsset;
+use crate::hex_utils::HexCoord;
+use crate::prelude::*;
+use crate::tile_manager::TileAsset;
+use crate::tile_mapper::TileMapperAsset;
+use bevy::{
+	prelude::*,
+	render::{
+		mesh::{Indices, PrimitiveTopology},
+		render_asset::RenderAssetUsages,
+	},
+};
+
+pub fn generate_packed_chunk_mesh(
+	chunk: &Chunk,
+	map: &Map,
+	painter: &BiomePainterAsset,
+	tiles: &Res<Assets<TileAsset>>,
+	mappers: &Res<Assets<TileMapperAsset>>,
+) -> Mesh {
+	let vertex_count: usize = Chunk::SIZE * Chunk::SIZE * 6;
+	let mut packed_data = Vec::with_capacity(vertex_count);
+	let mut indices = Vec::with_capacity(vertex_count);
+	let mut heights = Vec::with_capacity(vertex_count);
+
+	for z in 0..Chunk::SIZE {
+		for x in 0..Chunk::SIZE {
+			let height = chunk.heights[x + z * Chunk::SIZE];
+			let moisture = chunk.moisture[x + z * Chunk::SIZE];
+			let temperature = chunk.temperature[x + z * Chunk::SIZE];
+			let coord =
+				HexCoord::from_offset(IVec2::new(x as i32, z as i32) + (chunk.chunk_offset * Chunk::SIZE as i32));
+			let n = map.get_neighbors(&coord);
+			let biome = mappers.get(painter.sample_biome(moisture, temperature));
+			let tile_handle = biome.unwrap().sample_tile(height);
+			let tile = tiles.get(tile_handle).unwrap();
+
+			create_packed_tile(
+				UVec2::new(x as u32, z as u32),
+				height,
+				&n,
+				&mut packed_data,
+				&mut indices,
+				&mut heights,
+				tile.texture_id,
+				tile.side_texture_id,
+			);
+		}
+	}
+
+	let mesh = Mesh::new(
+		PrimitiveTopology::TriangleList,
+		RenderAssetUsages::MAIN_WORLD | RenderAssetUsages::RENDER_WORLD,
+	)
+	.with_inserted_attribute(ATTRIBUTE_PACKED_VERTEX_DATA, packed_data)
+	.with_inserted_attribute(ATTRIBUTE_VERTEX_HEIGHT, heights)
+	.with_inserted_indices(Indices::U32(indices));
+	return mesh;
+}
+
+fn create_packed_tile(
+	offset: UVec2,
+	height: f32,
+	neighbors: &[Option<f32>; 6],
+	packed_data: &mut Vec<u32>,
+	indices: &mut Vec<u32>,
+	heights: &mut Vec<f32>,
+	texture_index: u32,
+	side_texture_index: u32,
+) {
+	let idx = packed_data.len() as u32;
+
+	packed_data.push(pack_vertex_data(offset, 0, texture_index));
+	heights.push(height);
+	for i in 0..6 {
+		packed_data.push(pack_vertex_data(offset, i + 1, texture_index));
+		indices.push(idx);
+		indices.push(idx + 1 + i as u32);
+		indices.push(idx + 1 + ((i as u32 + 1) % 6));
+		heights.push(height);
+	}
+
+	for i in 0..neighbors.len() {
+		let cur_n = neighbors[i];
+		match cur_n {
+			Some(n_height) => {
+				if n_height < height {
+					create_packed_tile_wall(
+						offset,
+						height,
+						n_height,
+						i,
+						packed_data,
+						indices,
+						heights,
+						side_texture_index,
+					);
+				}
+			}
+			_ => {}
+		}
+	}
+}
+
+fn create_packed_tile_wall(
+	offset: UVec2,
+	height_top: f32,
+	height_bottom: f32,
+	side: usize,
+	packed_data: &mut Vec<u32>,
+	indices: &mut Vec<u32>,
+	heights: &mut Vec<f32>,
+	side_texture_index: u32,
+) {
+	let idx = packed_data.len() as u32;
+
+	let side_2 = ((side + 1) % 6) + 1;
+	packed_data.push(pack_vertex_data(offset, side + 1, side_texture_index));
+	packed_data.push(pack_vertex_data(offset, side_2, side_texture_index));
+	packed_data.push(pack_vertex_data(offset, side + 1, side_texture_index));
+	packed_data.push(pack_vertex_data(offset, side_2, side_texture_index));
+
+	heights.push(height_top);
+	heights.push(height_top);
+	heights.push(height_bottom);
+	heights.push(height_bottom);
+
+	indices.push(idx);
+	indices.push(idx + 2);
+	indices.push(idx + 1);
+
+	indices.push(idx + 1);
+	indices.push(idx + 2);
+	indices.push(idx + 3);
+}
+
+fn pack_vertex_data(offset: UVec2, vert: usize, tex: u32) -> u32 {
+	//6 + 6 bits offset
+	//4 bits vert
+	//12 bits texture
+	let mut data = offset.x;
+	data += (offset.y) << 6;
+	data += (vert as u32) << (6 + 6);
+	data += tex << (6 + 6 + 4);
+
+	return data;
+}