208 lines
7.6 KiB
Rust
208 lines
7.6 KiB
Rust
// SPDX-License-Identifier: AGPL-3.0-only
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use renderer::mesh::Vertex;
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use shared::world::{BlockId, CHUNK_SIZE, Chunk};
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#[expect(
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clippy::cast_precision_loss,
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clippy::cast_possible_truncation,
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clippy::too_many_lines
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)]
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pub fn generate_mesh(chunk: &Chunk) -> (Vec<Vertex>, Vec<u32>) {
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let mut vertices = Vec::new();
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let mut indices = Vec::new();
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for x in 0..CHUNK_SIZE {
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for y in 0..CHUNK_SIZE {
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for z in 0..CHUNK_SIZE {
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let block = chunk.get(x, y, z);
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if block == BlockId::AIR {
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continue;
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}
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let fx = x as f32;
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let fy = y as f32;
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let fz = z as f32;
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if y == CHUNK_SIZE - 1 || chunk.get(x, y + 1, z) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz + 0.5],
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color: [0.2, 0.8, 0.2],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz + 0.5],
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color: [0.2, 0.8, 0.2],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz - 0.5],
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color: [0.2, 0.8, 0.2],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz - 0.5],
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color: [0.2, 0.8, 0.2],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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if y == 0 || chunk.get(x, y - 1, z) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz - 0.5],
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color: [0.1, 0.4, 0.1],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz - 0.5],
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color: [0.1, 0.4, 0.1],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz + 0.5],
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color: [0.1, 0.4, 0.1],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz + 0.5],
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color: [0.1, 0.4, 0.1],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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if x == CHUNK_SIZE - 1 || chunk.get(x + 1, y, z) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz + 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz - 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz - 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz + 0.5],
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color: [0.15, 0.6, 0.15],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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if x == 0 || chunk.get(x - 1, y, z) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz - 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz + 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz + 0.5],
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color: [0.15, 0.6, 0.15],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz - 0.5],
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color: [0.15, 0.6, 0.15],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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if z == CHUNK_SIZE - 1 || chunk.get(x, y, z + 1) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz + 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz + 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz + 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz + 0.5],
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color: [0.18, 0.7, 0.18],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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if z == 0 || chunk.get(x, y, z - 1) == BlockId::AIR {
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let base_idx = vertices.len() as u32;
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vertices.push(Vertex {
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position: [fx + 0.5, fy - 0.5, fz - 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy - 0.5, fz - 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx - 0.5, fy + 0.5, fz - 0.5],
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color: [0.18, 0.7, 0.18],
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});
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vertices.push(Vertex {
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position: [fx + 0.5, fy + 0.5, fz - 0.5],
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color: [0.18, 0.7, 0.18],
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});
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indices.extend_from_slice(&[
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base_idx,
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base_idx + 1,
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base_idx + 2,
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base_idx + 2,
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base_idx + 3,
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base_idx,
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]);
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}
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}
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}
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}
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(vertices, indices)
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}
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