bevy/examples/3d/orthographic.rs

//! Shows how to create a 3D orthographic view (for isometric-look games or CAD applications).

use bevy::{prelude::*, render::camera::ScalingMode};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Startup, setup)
        .run();
}

/// set up a simple 3D scene
fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
) {
    // camera
    commands.spawn(Camera3dBundle {
        projection: OrthographicProjection {
            // 6 world units per window height.
            scaling_mode: ScalingMode::FixedVertical(6.0),
            ..default()
        }
        .into(),
        transform: Transform::from_xyz(5.0, 5.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
        ..default()
    });

    // plane
    commands.spawn(PbrBundle {
        mesh: meshes.add(shape::Plane::from_size(5.0).into()),
        material: materials.add(Color::rgb(0.3, 0.5, 0.3).into()),
        ..default()
    });
    // cubes
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
        material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
        transform: Transform::from_xyz(1.5, 0.5, 1.5),
        ..default()
    });
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
        material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
        transform: Transform::from_xyz(1.5, 0.5, -1.5),
        ..default()
    });
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
        material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
        transform: Transform::from_xyz(-1.5, 0.5, 1.5),
        ..default()
    });
    commands.spawn(PbrBundle {
        mesh: meshes.add(Mesh::from(shape::Cube { size: 1.0 })),
        material: materials.add(Color::rgb(0.8, 0.7, 0.6).into()),
        transform: Transform::from_xyz(-1.5, 0.5, -1.5),
        ..default()
    });
    // light
    commands.spawn(PointLightBundle {
        transform: Transform::from_xyz(3.0, 8.0, 5.0),
        ..default()
    });
}