Move gridconfig to plugin, hide grass using out of viewport

.vscode/launch.json

@@ -42,4 +42,4 @@
             "cwd": "${workspaceFolder}"
         }
     ]
-}
+}

assets/shaders/grass.wgsl

@@ -188,9 +188,14 @@ fn vertex(vertex: Vertex,
     out.world_position.z = out.world_position.z*growth;
 
     // "Hide" grass under map (This can be done better, probably by sampling 5x times and adjusting nr_instances based on texture sum over chunk)
+    // Randomaly hide some in order to get a smooth transition from grass to ground
     if growth<0.5 && growth/0.5<rand(vec2<f32>(f32(vertex.instance_index), 18.956724*cos(f32(vertex.instance_index)*2.9515))){
-        out.world_position.z = out.world_position.z+(-10.0);
-        out.clip_position = mesh_position_world_to_clip(out.world_position);
+        // Hide under map:
+        // out.world_position.z = out.world_position.z+(-10.0);
+        // out.clip_position = mesh_position_world_to_clip(out.world_position);
+
+        // Remove from view: (no perforamance gain compared to hiding under map)
+        out.clip_position = vec4<f32>(-2.0,-2.0,-2.0,-2.0);
         return out;
     } 
 

examples/forest.rs

@@ -90,14 +90,6 @@ fn main() {
         .add_plugin(OrbitCameraPlugin)
         .add_plugin(LogDiagnosticsPlugin::default())
         .add_plugin(FrameTimeDiagnosticsPlugin::default())
-        .insert_resource(GrowthTextures::default())
-        .insert_resource(GridConfig {
-            grid_center_xy: [0.0, 0.0],
-            grid_half_extents: [
-                NR_SIDE_CHUNKS as f32 * CHUNK_SIZE / 2.0,
-                NR_SIDE_CHUNKS as f32 * CHUNK_SIZE / 2.0,
-            ],
-        })
         .add_plugin(ChunkInstancingPlugin)
         .add_plugin(ChunkGrassPlugin)
         .add_enter_system(GameState::InGame, setup)
@@ -113,9 +105,18 @@ fn setup(
     mut materials: ResMut<Assets<StandardMaterial>>,
     mut images: ResMut<Assets<Image>>,
     mut meshes: ResMut<Assets<Mesh>>,
-    grid_config: Res<GridConfig>,
+    mut grid_config: ResMut<GridConfig>,
     mut growth_texture: ResMut<GrowthTextures>,
 ) {
+    //Set map size
+    *grid_config = GridConfig {
+        grid_center_xy: [0.0, 0.0],
+        grid_half_extents: [
+            NR_SIDE_CHUNKS as f32 * CHUNK_SIZE / 2.0,
+            NR_SIDE_CHUNKS as f32 * CHUNK_SIZE / 2.0,
+        ],
+    };
+
     //Growth Textures
     *growth_texture = GrowthTextures::new(&mut images);
 

src/rendering/chunk_grass.rs

@@ -31,8 +31,6 @@ use bytemuck::{Pod, Zeroable};
 
 use noise::{NoiseFn, Perlin, Seedable};
 
-use crate::camera::orbit::OrbitCamera;
-
 use super::{Chunk, DistanceCulling};
 
 //Bundle
@@ -114,6 +112,8 @@ impl Plugin for ChunkGrassPlugin {
         app.add_plugin(ExtractComponentPlugin::<ChunkGrass>::extract_visible());
         app.add_plugin(ExtractResourcePlugin::<GrowthTextures>::default());
         app.add_plugin(ExtractResourcePlugin::<GridConfig>::default());
+        app.insert_resource(GridConfig::default());
+        app.insert_resource(GrowthTextures::default());
         app.add_system(update_time_for_custom_material);
         app.add_system(grass_chunk_distance_culling);
 
@@ -150,6 +150,7 @@ impl GrowthTextures {
                     let noise =
                         perlin.get([x as f64 * pattern_scale, y as f64 * pattern_scale]) as f32;
                     let value = (noise + 1.0) / 2.0 * scale;
+                    // value = (value - 100.0).max(0.0); //Truncate short grass to 0.0
                     data.push(value as u8)
                 }
             }
@@ -172,7 +173,7 @@ impl GrowthTextures {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub struct GridConfig {
     pub grid_center_xy: [f32; 2], //Assume axis aligned grid otherwise need to calc homogenous coordinate matrix
     pub grid_half_extents: [f32; 2],
@@ -397,7 +398,7 @@ fn prepare_grid_config_bind_group(
     grid_config: Res<GridConfig>,
     custom_pipeline: Res<CustomPipeline>,
 ) {
-    if !grid_config_bind_group_res.grid_config_bind_group.is_some() {
+    if grid_config.is_changed() {
         let grid_config_buffer = render_device.create_buffer_with_data(&BufferInitDescriptor {
             label: Some("grid_config_buffer"),
             contents: bytemuck::cast_slice(&[grid_config.to_raw()]),

src/rendering/chunk_instancing.rs

@@ -20,8 +20,6 @@ use bevy::{
 
 use rand::Rng;
 
-use crate::camera::orbit::OrbitCamera;
-
 use super::{Chunk, DistanceCulling};
 
 //Bundle