87 lines
2.7 KiB
Rust
87 lines
2.7 KiB
Rust
//! This example shows various ways to configure texture materials in 3D.
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use std::f32::consts::PI;
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use bevy::prelude::*;
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_systems(Startup, setup)
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.run();
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}
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/// sets up a scene with textured entities
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fn setup(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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mut meshes: ResMut<Assets<Mesh>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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) {
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// load a texture and retrieve its aspect ratio
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let texture_handle = asset_server.load("branding/bevy_logo_dark_big.png");
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let aspect = 0.25;
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// create a new quad mesh. this is what we will apply the texture to
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let quad_width = 8.0;
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let quad_handle = meshes.add(Mesh::from(shape::Quad::new(Vec2::new(
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quad_width,
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quad_width * aspect,
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))));
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// this material renders the texture normally
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let material_handle = materials.add(StandardMaterial {
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base_color_texture: Some(texture_handle.clone()),
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alpha_mode: AlphaMode::Blend,
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unlit: true,
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..default()
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});
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// this material modulates the texture to make it red (and slightly transparent)
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let red_material_handle = materials.add(StandardMaterial {
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base_color: Color::rgba(1.0, 0.0, 0.0, 0.5),
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base_color_texture: Some(texture_handle.clone()),
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alpha_mode: AlphaMode::Blend,
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unlit: true,
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..default()
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});
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// and lets make this one blue! (and also slightly transparent)
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let blue_material_handle = materials.add(StandardMaterial {
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base_color: Color::rgba(0.0, 0.0, 1.0, 0.5),
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base_color_texture: Some(texture_handle),
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alpha_mode: AlphaMode::Blend,
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unlit: true,
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..default()
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});
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// textured quad - normal
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commands.spawn(PbrBundle {
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mesh: quad_handle.clone(),
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material: material_handle,
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transform: Transform::from_xyz(0.0, 0.0, 1.5)
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.with_rotation(Quat::from_rotation_x(-PI / 5.0)),
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..default()
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});
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// textured quad - modulated
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commands.spawn(PbrBundle {
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mesh: quad_handle.clone(),
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material: red_material_handle,
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transform: Transform::from_rotation(Quat::from_rotation_x(-PI / 5.0)),
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..default()
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});
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// textured quad - modulated
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commands.spawn(PbrBundle {
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mesh: quad_handle,
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material: blue_material_handle,
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transform: Transform::from_xyz(0.0, 0.0, -1.5)
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.with_rotation(Quat::from_rotation_x(-PI / 5.0)),
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..default()
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});
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// camera
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commands.spawn(Camera3dBundle {
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transform: Transform::from_xyz(3.0, 5.0, 8.0).looking_at(Vec3::ZERO, Vec3::Y),
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..default()
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});
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}
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