From e71add5ae10121f7a821456e7f6960ea96210131 Mon Sep 17 00:00:00 2001
From: jacopograndi <jacopo.grandi@outlook.it>
Date: Sun, 14 May 2023 00:02:58 +0200
Subject: wgsl shader testing

---
 src/main.rs | 46 ++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 40 insertions(+), 6 deletions(-)

(limited to 'src/main.rs')

diff --git a/src/main.rs b/src/main.rs
index 24b706f..9e43468 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,11 @@ use std::collections::HashMap;
 
 use itertools::Itertools;
 
-use bevy::prelude::*;
+use bevy::{
+    prelude::*,
+    reflect::TypeUuid,
+    render::render_resource::{AsBindGroup, ShaderRef},
+};
 use polyhedron_ops as p_ops;
 use smooth_bevy_cameras::{
     controllers::orbit::{OrbitCameraBundle, OrbitCameraController, OrbitCameraPlugin},
@@ -17,6 +21,7 @@ fn main() {
         .add_plugin(OrbitCameraPlugin::default())
         .add_startup_system(setup)
         .add_system(bevy::window::close_on_esc)
+        .add_plugin(MaterialPlugin::<EnemyMaterial>::default())
         .run();
 }
 
@@ -30,7 +35,6 @@ impl ShapeMap {
         let mut sm = ShapeMap {
             shapes: HashMap::new(),
         };
-
         for var in (1..=depth as usize).flat_map(|n| {
             std::iter::repeat(ops.chars())
                 .take(n)
@@ -50,18 +54,22 @@ impl ShapeMap {
 fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
-    mut materials: ResMut<Assets<StandardMaterial>>,
+    mut base_materials: ResMut<Assets<StandardMaterial>>,
+    mut enemy_materials: ResMut<Assets<EnemyMaterial>>,
 ) {
     let depth = 1;
-    let sm = ShapeMap::new("T", "asdk", depth);
+    let sm = ShapeMap::new("T", "skad", depth);
 
     let mut x = 0;
     let mut y = 0;
     for (_, s) in sm.shapes.iter() {
         let pos = Vec3::new(0.0, x as f32 * 2.0, y as f32 * 2.0);
-        commands.spawn(PbrBundle {
+        commands.spawn(MaterialMeshBundle {
             mesh: meshes.add(Mesh::from(s.clone())),
-            material: materials.add(Color::rgb(0.4, 0.35, 0.3).into()),
+            material: enemy_materials.add(EnemyMaterial {
+                color: Color::rgba(1.0, 1.0, 1.0, 1.0),
+                alpha_mode: AlphaMode::Opaque,
+            }),
             transform: Transform::from_translation(pos),
             ..default()
         });
@@ -72,6 +80,14 @@ fn setup(
         }
     }
 
+    // reference cube
+    commands.spawn(MaterialMeshBundle {
+        mesh: meshes.add(Mesh::from(shape::Cube::default())),
+        material: base_materials.add(Color::BLUE.into()),
+        transform: Transform::from_translation(Vec3::new(-2.0, 0.0, 0.0)),
+        ..default()
+    });
+
     commands
         // light
         .spawn(DirectionalLightBundle {
@@ -93,3 +109,21 @@ fn setup(
             Vec3::new(0., -1., 0.),
         ));
 }
+
+impl Material for EnemyMaterial {
+    fn fragment_shader() -> ShaderRef {
+        "shaders/enemy_material.wgsl".into()
+    }
+
+    fn alpha_mode(&self) -> AlphaMode {
+        self.alpha_mode
+    }
+}
+
+#[derive(AsBindGroup, TypeUuid, Debug, Clone)]
+#[uuid = "f690fdae-d598-45ab-8225-97e2a3f056e0"]
+pub struct EnemyMaterial {
+    #[uniform(0)]
+    color: Color,
+    alpha_mode: AlphaMode,
+}
-- 
cgit v1.2.3-54-g00ecf