generated from tipragot/rust
Add a camera system #69
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@ -1,13 +1,24 @@
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//! TODO
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use bevy::input::mouse::MouseScrollUnit;
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use bevy::prelude::*;
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use bevy::input::mouse::MouseWheel;
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/// TODO
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const CAMERRA_SPEED: f32 = 10.;
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const CAMERRA_SPEED_ZOOM: f32 = 0.1;
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const SMOOTHING: f32 = 0.5;
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const MIN_ZOOM: f32 = 0.5;
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const MAX_ZOOM: f32 = 5.;
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/// TODO
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pub struct CameraPlugin;
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impl Plugin for CameraPlugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Startup, init_camera);
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app.add_systems(Startup, init_camera)
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tipragot
commented
No abreviations No abreviations
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.add_systems(Update, handle_movement)
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.add_systems(Update, zoom_system);
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}
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}
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@ -16,6 +27,41 @@ fn init_camera(mut commands: Commands) {
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commands.spawn(Camera2dBundle::default());
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}
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fn movement_system(){}
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fn zoom_system(){}
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fn handle_movement(mut query: Query<&mut Transform, With<Camera>>, keys: Res<Input<KeyCode>>,){
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for mut camera_transform in query.iter_mut() {
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let mut target = camera_transform.translation.clone();
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if keys.pressed(KeyCode::Z) {
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target.y += CAMERRA_SPEED;
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}
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else if keys.pressed(KeyCode::S) {
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target.y -= CAMERRA_SPEED;
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}
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if keys.pressed(KeyCode::D) {
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target.x += CAMERRA_SPEED;
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}
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else if keys.pressed(KeyCode::Q) {
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target.x -= CAMERRA_SPEED;
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}
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camera_transform.translation = camera_transform
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.translation
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.lerp(target, SMOOTHING);
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}
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}
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fn zoom_system(mut scroll_evr: EventReader<MouseWheel>, mut query: Query<&mut OrthographicProjection, With<Camera>>){
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for ev in scroll_evr.read() {
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for mut camera_projection in query.iter_mut() {
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if ev.unit == MouseScrollUnit::Pixel {
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return;
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}
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tipragot
commented
Not only... Not only...
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if camera_projection.scale + ev.y * CAMERRA_SPEED_ZOOM > MIN_ZOOM && camera_projection.scale + ev.y * CAMERRA_SPEED_ZOOM < MAX_ZOOM {
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camera_projection.scale += ev.y * CAMERRA_SPEED_ZOOM;
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}
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}
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}
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}
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