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/*
wearechat - generic multiplayer game with voip
Copyright (C) 2025 metamuffin
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, version 3 of the License only.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use glam::{Affine3A, EulerRot, Mat3, Mat4, Vec2, Vec3, vec3};
pub struct Camera {
pos: Vec3,
rot: Vec3,
fov: f32,
pub aspect: f32,
}
impl Default for Camera {
fn default() -> Self {
Self::new()
}
}
impl Camera {
pub fn new() -> Self {
Self {
aspect: 1.,
fov: 1.,
pos: Vec3::Z * 3.,
rot: Vec3::ZERO,
}
}
pub fn update(&mut self, input_move: Vec3, input_rot: Vec2, dt: f32) {
self.pos += self.rotation_mat() * (vec3(input_move.z, input_move.y, -input_move.x) * dt);
self.rot.x += input_rot.x * -0.002;
self.rot.y += input_rot.y * -0.002;
}
pub fn position(&self) -> Vec3 {
self.pos
}
pub fn rotation(&self) -> Vec3 {
self.rot
}
pub fn rotation_mat(&self) -> Mat3 {
Mat3::from_euler(EulerRot::YXZ, self.rot.x, self.rot.y, self.rot.z)
}
pub fn view_matrix(&self) -> Mat4 {
Mat4::from_mat3(self.rotation_mat().inverse()) * Mat4::from_translation(-self.pos)
}
pub fn project_matrix(&self) -> Mat4 {
Mat4::perspective_rh(self.fov, self.aspect, 0.01, 300.)
}
pub fn new_ui_affine(&self) -> Affine3A {
Affine3A::from_mat3_translation(
self.rotation_mat(),
self.pos + self.rotation_mat() * vec3(0., 0., -3.),
)
}
}
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