64 lines
2 KiB
Rust
64 lines
2 KiB
Rust
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use bevy::prelude::*;
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use crate::{geometry::CyberBike, input::InputState, physics::MovementSettings};
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pub(crate) const CAM_DIST: f32 = 50.0;
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#[derive(Component, Debug)]
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pub struct CyberCam;
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fn setup_cybercam(mut commands: Commands) {
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use crate::geometry::PLAYER_DIST;
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commands
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.spawn_bundle(PerspectiveCameraBundle {
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transform: Transform::from_xyz(PLAYER_DIST + CAM_DIST, 0.0, 0.0)
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.looking_at(Vec3::ZERO, Vec3::Y),
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..Default::default()
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})
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.insert(CyberCam);
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}
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fn follow_player(
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bike_query: Query<(&Transform, &CyberBike), Without<CyberCam>>,
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mut cam_query: Query<(&mut Transform, &CyberCam), Without<CyberBike>>,
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) {
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let (bike_xform, _) = bike_query.single();
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let up = bike_xform.translation.normalize();
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let look_at = bike_xform.translation;
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let cam_pos = bike_xform.translation + (bike_xform.back() * CAM_DIST * 1.3) + (up * CAM_DIST);
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let (mut cam_xform, _) = cam_query.single_mut();
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cam_xform.translation = cam_pos;
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cam_xform.look_at(look_at, up);
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}
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fn player_look(
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settings: Res<MovementSettings>,
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windows: Res<Windows>,
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time: Res<Time>,
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istate: Res<InputState>,
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mut query: Query<(&mut Transform, &CyberBike)>,
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) {
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let window = windows.get_primary().unwrap();
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let window_scale = window.height().min(window.width());
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let dt = time.delta_seconds();
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let (mut transform, _) = query.single_mut();
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let d_alt = (settings.sensitivity * dt * window_scale * istate.pitch).to_radians();
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let d_az = (settings.sensitivity * dt * window_scale * istate.yaw).to_radians();
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let rotation = Quat::from_axis_angle(transform.local_y(), d_az)
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* Quat::from_axis_angle(transform.local_x(), d_alt);
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transform.rotate(rotation);
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}
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pub struct CyberCamPlugin;
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impl Plugin for CyberCamPlugin {
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fn build(&self, app: &mut bevy::prelude::App) {
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app.add_startup_system(setup_cybercam)
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.add_system(follow_player)
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.add_system(player_look);
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}
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}
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