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|
mod camera;
mod pipeline;
use camera::Camera;
use pipeline::Pipeline;
use crate::wgpu;
use pipeline::cube::{self, Cube};
use iced::mouse;
use iced::time::Duration;
use iced::widget::shader;
use iced::{Color, Rectangle, Size};
use glam::Vec3;
use rand::Rng;
use std::cmp::Ordering;
use std::iter;
pub const MAX: u32 = 500;
#[derive(Clone)]
pub struct Scene {
pub size: f32,
pub cubes: Vec<Cube>,
pub camera: Camera,
pub show_depth_buffer: bool,
pub light_color: Color,
}
impl Scene {
pub fn new() -> Self {
let mut scene = Self {
size: 0.2,
cubes: vec![],
camera: Camera::default(),
show_depth_buffer: false,
light_color: Color::WHITE,
};
scene.change_amount(MAX);
scene
}
pub fn update(&mut self, time: Duration) {
for cube in self.cubes.iter_mut() {
cube.update(self.size, time.as_secs_f32());
}
}
pub fn change_amount(&mut self, amount: u32) {
let curr_cubes = self.cubes.len() as u32;
match amount.cmp(&curr_cubes) {
Ordering::Greater => {
// spawn
let cubes_2_spawn = (amount - curr_cubes) as usize;
let mut cubes = 0;
self.cubes.extend(iter::from_fn(|| {
if cubes < cubes_2_spawn {
cubes += 1;
Some(Cube::new(self.size, rnd_origin()))
} else {
None
}
}));
}
Ordering::Less => {
// chop
let cubes_2_cut = curr_cubes - amount;
let new_len = self.cubes.len() - cubes_2_cut as usize;
self.cubes.truncate(new_len);
}
Ordering::Equal => {}
}
}
}
impl<Message> shader::Program<Message> for Scene {
type State = ();
type Primitive = Primitive;
fn draw(
&self,
_state: &Self::State,
_cursor: mouse::Cursor,
bounds: Rectangle,
) -> Self::Primitive {
Primitive::new(
&self.cubes,
&self.camera,
bounds,
self.show_depth_buffer,
self.light_color,
)
}
}
/// A collection of `Cube`s that can be rendered.
#[derive(Debug)]
pub struct Primitive {
cubes: Vec<cube::Raw>,
uniforms: pipeline::Uniforms,
show_depth_buffer: bool,
}
impl Primitive {
pub fn new(
cubes: &[Cube],
camera: &Camera,
bounds: Rectangle,
show_depth_buffer: bool,
light_color: Color,
) -> Self {
let uniforms = pipeline::Uniforms::new(camera, bounds, light_color);
Self {
cubes: cubes
.iter()
.map(cube::Raw::from_cube)
.collect::<Vec<cube::Raw>>(),
uniforms,
show_depth_buffer,
}
}
}
impl shader::Primitive for Primitive {
fn prepare(
&self,
format: wgpu::TextureFormat,
device: &wgpu::Device,
queue: &wgpu::Queue,
_bounds: Rectangle,
target_size: Size<u32>,
_scale_factor: f32,
storage: &mut shader::Storage,
) {
if !storage.has::<Pipeline>() {
storage.store(Pipeline::new(device, queue, format, target_size));
}
let pipeline = storage.get_mut::<Pipeline>().unwrap();
//upload data to GPU
pipeline.update(
device,
queue,
target_size,
&self.uniforms,
self.cubes.len(),
&self.cubes,
);
}
fn render(
&self,
storage: &shader::Storage,
target: &wgpu::TextureView,
_target_size: Size<u32>,
viewport: Rectangle<u32>,
encoder: &mut wgpu::CommandEncoder,
) {
//at this point our pipeline should always be initialized
let pipeline = storage.get::<Pipeline>().unwrap();
//render primitive
pipeline.render(
target,
encoder,
viewport,
self.cubes.len() as u32,
self.show_depth_buffer,
);
}
}
fn rnd_origin() -> Vec3 {
Vec3::new(
rand::thread_rng().gen_range(-4.0..4.0),
rand::thread_rng().gen_range(-4.0..4.0),
rand::thread_rng().gen_range(-4.0..2.0),
)
}
|
