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use super::{gpu::Gpu, util::MatrixUniform};
use cgmath::{prelude::*, Deg, Euler, Matrix3, Matrix4, Point3, Rad, Vector3};
use collision::Frustum;
use std::time::Duration;
#[derive(Default)]
pub struct CameraInput {
pub forward: bool,
pub left: bool,
pub backward: bool,
pub right: bool,
pub jump: bool,
pub sneak: bool,
pub mouse_x: f32,
pub mouse_y: f32,
}
pub struct Camera {
pub pos: Point3<f32>,
pub rot: Euler<Deg<f32>>,
pub speed: f32,
pub fov: Rad<f32>,
pub view: Matrix4<f32>,
pub proj: Matrix4<f32>,
pub frustum: Frustum<f32>,
pub uniform: MatrixUniform,
pub layout: wgpu::BindGroupLayout,
pub input: CameraInput,
}
pub trait ToNative {
fn to_native(self) -> Self;
}
impl<T> ToNative for Euler<T>
where
T: From<Deg<f32>> + std::ops::Add<T, Output = T> + std::ops::Neg<Output = T>,
{
fn to_native(mut self) -> Self {
self.y = -self.y + Deg(270.0).into();
self.z = -self.z;
self
}
}
impl Camera {
pub fn new(gpu: &Gpu) -> Self {
let layout = MatrixUniform::layout(&gpu.device, "camera");
let uniform = MatrixUniform::new(&gpu.device, &layout, Matrix4::identity(), "camera", true);
Self {
pos: Point3::new(0.0, 0.0, 0.0),
rot: Euler {
x: Deg(0.0),
y: Deg(0.0),
z: Deg(0.0),
},
speed: 0.0,
fov: Deg(90.0).into(),
proj: Matrix4::identity(),
view: Matrix4::identity(),
frustum: Frustum::from_matrix4(Matrix4::identity()).unwrap(),
uniform,
layout,
input: Default::default(),
}
}
pub fn update(&mut self, gpu: &Gpu, dt: Duration) {
let dt = dt.as_secs_f32();
let sensitivity = dt * 2.0;
self.rot.y += Deg(sensitivity * self.input.mouse_x);
self.rot.z += Deg(sensitivity * self.input.mouse_y);
self.rot.z.0 = self.rot.z.0.min(89.9).max(-89.9);
self.input.mouse_x = 0.0;
self.input.mouse_y = 0.0;
let rot = Matrix3::from(self.rot.to_native());
let forward = rot * Vector3::unit_x();
let up = rot * Vector3::unit_y();
{
let mut forward = forward;
let mut up = up;
let mut right = forward.cross(up);
let pitch_move = false;
if !pitch_move {
forward.y = 0.0;
right.y = 0.0;
up = Vector3::unit_y();
}
let mut hdir = Vector3::zero();
let mut vdir = Vector3::zero();
if self.input.forward {
hdir += forward;
}
if self.input.backward {
hdir -= forward;
}
if self.input.right {
hdir += right;
}
if self.input.left {
hdir -= right;
}
if self.input.jump {
vdir += up;
}
if self.input.sneak {
vdir -= up;
}
self.pos += self.speed
* dt
* (vdir
+ if hdir.is_zero() {
hdir
} else {
hdir.normalize()
});
}
self.view = Matrix4::look_at_dir(self.pos, forward, up);
self.uniform.set(&gpu.queue, self.proj * self.view);
}
pub fn resize(&mut self, size: winit::dpi::PhysicalSize<u32>) {
self.proj = cgmath::perspective(
self.fov,
size.width as f32 / size.height as f32,
0.1,
100000.0,
);
self.frustum = Frustum::from_matrix4(self.proj).unwrap();
}
}
|
