From daf0eb3897a747ebfed031603f8ab2a1dfdf31e6 Mon Sep 17 00:00:00 2001
From: Paris DOUADY <paris.douady@hotmail.fr>
Date: Sun, 10 Dec 2023 23:26:02 +0100
Subject: [PATCH] rename LevelData to ChunkData

---
 assets/shaders/terrain.frag.wgsl |  4 ++--
 assets/shaders/terrain.vert.wgsl | 18 +++++++++---------
 engine/src/drawables/terrain.rs  |  8 ++++----
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/assets/shaders/terrain.frag.wgsl b/assets/shaders/terrain.frag.wgsl
index 5e54ecb4..21d2db3e 100644
--- a/assets/shaders/terrain.frag.wgsl
+++ b/assets/shaders/terrain.frag.wgsl
@@ -6,7 +6,7 @@ struct FragmentOutput {
     @location(0) out_color: vec4<f32>,
 }
 
-struct LevelData {
+struct ChunkData {
     lod: u32,
     resolution: u32,
 }
@@ -17,7 +17,7 @@ struct LevelData {
 @group(2) @binding(1) var s_terraindata: sampler;
 @group(2) @binding(2) var t_grass: texture_2d<f32>;
 @group(2) @binding(3) var s_grass: sampler;
-@group(2) @binding(4) var<uniform> ldata: LevelData;
+@group(2) @binding(4) var<uniform> cdata: ChunkData;
 
 @group(3) @binding(0)  var t_ssao: texture_2d<f32>;
 @group(3) @binding(1)  var s_ssao: sampler;
diff --git a/assets/shaders/terrain.vert.wgsl b/assets/shaders/terrain.vert.wgsl
index 3dd102ab..e35e710d 100644
--- a/assets/shaders/terrain.vert.wgsl
+++ b/assets/shaders/terrain.vert.wgsl
@@ -13,7 +13,7 @@ struct VertexOutput {
     @builtin(position) member: vec4<f32>,
 }
 
-struct LevelData {
+struct ChunkData {
     lod: u32,
     resolution: u32,
     distance_lod_cutoff: f32, // max distance at which to switch to the next lod to have smooth transitions
@@ -27,7 +27,7 @@ struct LevelData {
 
 @group(2) @binding(0) var t_terraindata: texture_2d<u32>;
 @group(2) @binding(1) var s_terraindata: sampler;
-@group(2) @binding(4) var<uniform> ldata: LevelData;
+@group(2) @binding(4) var<uniform> cdata: ChunkData;
 
 /*
 normal: vec3(self.cell_size * scale as f32, 0.0, hx - height)
@@ -51,29 +51,29 @@ fn unpack_diffs(v: u32) -> vec2<f32> {
 
 @vertex
 fn vert(@builtin(vertex_index) vid: u32, @location(0) in_position: vec2<f32>, @location(1) in_off: vec2<f32>) -> VertexOutput {
-    let tpos: vec2<i32> =  vec2<i32>((in_position + in_off) * ldata.inv_cell_size);
+    let tpos: vec2<i32> =  vec2<i32>((in_position + in_off) * cdata.inv_cell_size);
 
     let texLoad: vec2<u32> = textureLoad(t_terraindata, tpos, 0).rg;
 
     let height: f32 = unpack_height(texLoad.r);
     let diffs: vec2<f32> = unpack_diffs(texLoad.g);
 
-    let step: i32 = i32(pow(2.0, f32(ldata.lod)));
+    let step: i32 = i32(pow(2.0, f32(cdata.lod)));
 
-    let zf_off: vec2<i32> =  vec2( step * (i32(vid % ldata.resolution) % 2),
-                                   step * (i32(vid / ldata.resolution) % 2));
+    let zf_off: vec2<i32> =  vec2( step * (i32(vid % cdata.resolution) % 2),
+                                   step * (i32(vid / cdata.resolution) % 2));
 
     let world_pos: vec3<f32> = vec3(in_position + in_off, height);
 
     //let dist_to_cam: f32 = length(params.cam_pos.xyz - vec3(pos.xy, 0.0));
-    //let transition_alpha: f32 = smoothstep(ldata.distance_lod_cutoff * 0.8, ldata.distance_lod_cutoff, dist_to_cam);
+    //let transition_alpha: f32 = smoothstep(cdata.distance_lod_cutoff * 0.8, cdata.distance_lod_cutoff, dist_to_cam);
 
-    var out_normal: vec3<f32> = normalize(vec3(diffs.x, diffs.y, ldata.cell_size * 2.0)); // https://stackoverflow.com/questions/49640250/calculate-normals-from-heightmap
+    var out_normal: vec3<f32> = normalize(vec3(diffs.x, diffs.y, cdata.cell_size * 2.0)); // https://stackoverflow.com/questions/49640250/calculate-normals-from-heightmap
 
     let position: vec4<f32> = global.u_view_proj * vec4(world_pos, 1.0);
 
 #ifdef DEBUG
-    var debug = f32(ldata.lod);
+    var debug = f32(cdata.lod);
 
     if(height >= MAX_HEIGHT) {
         debug = diffs.x;
diff --git a/engine/src/drawables/terrain.rs b/engine/src/drawables/terrain.rs
index 24cd44b1..35b7de54 100644
--- a/engine/src/drawables/terrain.rs
+++ b/engine/src/drawables/terrain.rs
@@ -61,7 +61,7 @@ impl<const CSIZE: usize, const CRESOLUTION: usize> TerrainRender<CSIZE, CRESOLUT
         let mut bgs = vec![];
         for lod in 0..LOD {
             let uni = Uniform::new(
-                LevelData {
+                TerrainChunkData {
                     lod: lod as u32,
                     resolution: 1 + CRESOLUTION as u32 / (1 << lod as u32),
                     distance_lod_cutoff: 2.0f32.powf(1.0 + LOD_MIN_DIST_LOG2 + lod as f32)
@@ -317,14 +317,14 @@ u8slice_impl!(TerrainInstance);
 
 #[derive(Copy, Clone)]
 #[repr(C)]
-pub(crate) struct LevelData {
+pub struct TerrainChunkData {
     lod: u32,                 // 0 = highest resolution, 1 = half resolution, etc.
     resolution: u32,          // width of the vertex grid
     distance_lod_cutoff: f32, // max distance at which to switch to the next lod to have smooth transitions
     cell_size: f32,
     inv_cell_size: f32,
 }
-u8slice_impl!(LevelData);
+u8slice_impl!(TerrainChunkData);
 
 const ATTRS: &[VertexAttribute] = &wgpu::vertex_attr_array![1 => Float32x2];
 
@@ -369,7 +369,7 @@ impl PipelineBuilder for TerrainPipeline {
             .create_bind_group_layout(&BindGroupLayoutDescriptor {
                 entries: &Texture::bindgroup_layout_entries(0, [TL::UInt, TL::Float].into_iter())
                     .chain(std::iter::once(
-                        Uniform::<LevelData>::bindgroup_layout_entry(4),
+                        Uniform::<TerrainChunkData>::bindgroup_layout_entry(4),
                     ))
                     .collect::<Vec<_>>(),
                 label: Some("terrain bindgroup layout"),