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Adopted PR from dmlary, all credit to them! https://github.com/bevyengine/bevy/pull/9915 Original description: # Objective The default value for `near` in `OrthographicProjection` should be different for 2d & 3d. For 2d using `near = -1000` allows bevy users to build up scenes using background `z = 0`, and foreground elements `z > 0` similar to css. However in 3d `near = -1000` results in objects behind the camera being rendered. Using `near = 0` works for 3d, but forces 2d users to assign `z <= 0` for rendered elements, putting the background at some arbitrary negative value. There is no common value for `near` that doesn't result in a footgun or usability issue for either 2d or 3d, so they should have separate values. There was discussion about other options in the discord [0](https://discord.com/channels/691052431525675048/1154114310042292325), but splitting `default()` into `default_2d()` and `default_3d()` seemed like the lowest cost approach. Related/past work https://github.com/bevyengine/bevy/issues/9138, https://github.com/bevyengine/bevy/pull/9214, https://github.com/bevyengine/bevy/pull/9310, https://github.com/bevyengine/bevy/pull/9537 (thanks to @Selene-Amanita for the list) ## Solution This commit splits `OrthographicProjection::default` into `default_2d` and `default_3d`. ## Migration Guide - In initialization of `OrthographicProjection`, change `..default()` to `..OrthographicProjection::default_2d()` or `..OrthographicProjection::default_3d()` Example: ```diff --- a/examples/3d/orthographic.rs +++ b/examples/3d/orthographic.rs @@ -20,7 +20,7 @@ fn setup( projection: OrthographicProjection { scale: 3.0, scaling_mode: ScalingMode::FixedVertical(2.0), - ..default() + ..OrthographicProjection::default_3d() } .into(), transform: Transform::from_xyz(5.0, 5.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y), ``` --------- Co-authored-by: David M. Lary <dmlary@gmail.com> Co-authored-by: Jan Hohenheim <jan@hohenheim.ch>
66 lines
2 KiB
Rust
66 lines
2 KiB
Rust
//! Shows how to create a 3D orthographic view (for isometric-look games or CAD applications).
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use bevy::{prelude::*, render::camera::ScalingMode};
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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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/// set up a simple 3D scene
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fn setup(
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mut commands: Commands,
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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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// camera
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commands.spawn(Camera3dBundle {
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projection: OrthographicProjection {
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// 6 world units per window height.
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scaling_mode: ScalingMode::FixedVertical(6.0),
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..OrthographicProjection::default_3d()
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}
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.into(),
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transform: Transform::from_xyz(5.0, 5.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
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..default()
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});
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// plane
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commands.spawn(PbrBundle {
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mesh: meshes.add(Plane3d::default().mesh().size(5.0, 5.0)),
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material: materials.add(Color::srgb(0.3, 0.5, 0.3)),
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..default()
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});
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// cubes
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commands.spawn(PbrBundle {
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mesh: meshes.add(Cuboid::default()),
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material: materials.add(Color::srgb(0.8, 0.7, 0.6)),
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transform: Transform::from_xyz(1.5, 0.5, 1.5),
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..default()
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});
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commands.spawn(PbrBundle {
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mesh: meshes.add(Cuboid::default()),
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material: materials.add(Color::srgb(0.8, 0.7, 0.6)),
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transform: Transform::from_xyz(1.5, 0.5, -1.5),
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..default()
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});
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commands.spawn(PbrBundle {
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mesh: meshes.add(Cuboid::default()),
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material: materials.add(Color::srgb(0.8, 0.7, 0.6)),
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transform: Transform::from_xyz(-1.5, 0.5, 1.5),
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..default()
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});
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commands.spawn(PbrBundle {
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mesh: meshes.add(Cuboid::default()),
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material: materials.add(Color::srgb(0.8, 0.7, 0.6)),
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transform: Transform::from_xyz(-1.5, 0.5, -1.5),
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..default()
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});
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// light
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commands.spawn(PointLightBundle {
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transform: Transform::from_xyz(3.0, 8.0, 5.0),
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..default()
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});
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}
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