vertix 0.4.10

A cross-platform performant ECS game engine
Documentation 
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use crate::model::{Material, Model};
#[cfg(target_arch = "wasm32")]
use wasm_bindgen::prelude::*;
use winit::{
    dpi::PhysicalPosition,
    event::{ElementState, MouseScrollDelta, VirtualKeyCode},
};
pub enum MeshType {
    Model(Model),
    SingleMesh(SingleMesh),
}
pub struct SingleMesh {
    pub vertex_buffer: wgpu::Buffer,
    pub index_buffer: wgpu::Buffer,
    pub num_elements: u32,
    pub material: Material,
}
#[repr(C)]
#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
pub struct Vertex {
    pub position: [f32; 3],
    pub tex_coords: [f32; 2],
}

impl Vertex {
    pub fn new(position: [f32; 3], tex_coords: [f32; 2]) -> Self {
        Self {
            position,
            tex_coords,
        }
    }
    pub fn desc() -> wgpu::VertexBufferLayout<'static> {
        use std::mem;
        wgpu::VertexBufferLayout {
            array_stride: mem::size_of::<Vertex>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Vertex,
            attributes: &[
                wgpu::VertexAttribute {
                    offset: 0,
                    shader_location: 0,
                    format: wgpu::VertexFormat::Float32x3,
                },
                wgpu::VertexAttribute {
                    offset: mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
                    shader_location: 1,
                    format: wgpu::VertexFormat::Float32x2,
                },
            ],
        }
    }
}

#[derive(Debug)]
pub struct CameraController {
    pub amount_left: f32,
    pub amount_right: f32,
    pub amount_forward: f32,
    pub amount_backward: f32,
    pub amount_up: f32,
    pub amount_down: f32,
    pub rotate_horizontal: f32,
    pub rotate_vertical: f32,
    pub scroll: f32,
    pub speed: f32,
    pub sensitivity: f32,
}

impl CameraController {
    pub fn new(speed: f32, sensitivity: f32) -> Self {
        Self {
            amount_left: 0.0,
            amount_right: 0.0,
            amount_forward: 0.0,
            amount_backward: 0.0,
            amount_up: 0.0,
            amount_down: 0.0,
            rotate_horizontal: 0.0,
            rotate_vertical: 0.0,
            scroll: 0.0,
            speed,
            sensitivity,
        }
    }

    pub fn process_keyboard(&mut self, key: VirtualKeyCode, state: ElementState) -> bool {
        let amount = if state == ElementState::Pressed {
            1.0
        } else {
            0.0
        };
        match key {
            VirtualKeyCode::W | VirtualKeyCode::Up => {
                self.amount_forward = amount;
                true
            }
            VirtualKeyCode::S | VirtualKeyCode::Down => {
                self.amount_backward = amount;
                true
            }
            VirtualKeyCode::A | VirtualKeyCode::Left => {
                self.amount_left = amount;
                true
            }
            VirtualKeyCode::D | VirtualKeyCode::Right => {
                self.amount_right = amount;
                true
            }
            VirtualKeyCode::Space => {
                self.amount_up = amount;
                true
            }
            VirtualKeyCode::LShift => {
                self.amount_down = amount;
                true
            }
            _ => false,
        }
    }

    pub fn process_mouse(&mut self, mouse_dx: f64, mouse_dy: f64) {
        self.rotate_horizontal = mouse_dx as f32;
        self.rotate_vertical = mouse_dy as f32;
    }

    pub fn process_scroll(&mut self, delta: &MouseScrollDelta) {
        self.scroll = match delta {
            // I'm assuming a line is about 100 pixels
            MouseScrollDelta::LineDelta(_, scroll) => scroll * 3.0,
            MouseScrollDelta::PixelDelta(PhysicalPosition { y: scroll, .. }) => *scroll as f32,
        };
    }
}