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use std::error::Error;
use std::fs::read_to_string;
use std::path::Path;
use engine::camera::fly::{Extension as FlyCameraExtension, Options as FlyCameraOptions};
use engine::camera::Camera;
use engine::color::Color;
use engine::data_types::dimens::Dimens;
use engine::ecs::sole::Single;
use engine::event::Start as StartEvent;
use engine::file_format::wavefront::mtl::parse as parse_mtl;
use engine::file_format::wavefront::obj::parse as parse_obj;
use engine::input::Extension as InputExtension;
use engine::lighting::{AttenuationParams, GlobalLight, PointLight};
use engine::material::{Builder as MaterialBuilder, Flags as MaterialFlags};
use engine::renderer::Extension as RendererExtension;
use engine::shader::Program as ShaderProgram;
use engine::transform::Transform;
use engine::vector::Vec3;
use engine::window::{CursorMode, Extension as WindowExtension, Window};
use engine::Engine;
use tracing::Level;
use tracing_subscriber::FmtSubscriber;
const WINDOW_SIZE: Dimens<u32> = Dimens { width: 1920, height: 1080 };
const YELLOW: Color<f32> = Color {
red: 0.988235294118,
green: 0.941176470588,
blue: 0.0274509803922,
};
const RESOURCE_DIR: &str = "res";
fn main() -> Result<(), Box<dyn Error>>
{
let subscriber = FmtSubscriber::builder()
.with_max_level(Level::TRACE)
.finish();
tracing::subscriber::set_global_default(subscriber)?;
let mut engine = Engine::new();
let transform = Transform {
position: Vec3 { x: 1.6, y: 0.0, z: 0.0 },
..Default::default()
};
let teapot_obj =
parse_obj(&read_to_string(Path::new(RESOURCE_DIR).join("teapot.obj"))?)?;
let teapot_mat_name = teapot_obj
.faces
.first()
.and_then(|face| face.material_name.as_ref());
let teapot_mats = teapot_obj.read_and_parse_material_libs(parse_mtl)?;
let teapot_mat = teapot_mats
.into_iter()
.find(|mat| Some(&mat.name) == teapot_mat_name)
.ok_or("Teapot material was not found")?;
engine.spawn((
teapot_obj.to_mesh()?,
teapot_mat.material,
transform,
ShaderProgram::new()?,
));
engine.spawn((
PointLight::builder()
.diffuse(YELLOW)
.attenuation_params(AttenuationParams {
linear: 0.045,
quadratic: 0.0075,
..Default::default()
})
.build(),
Transform {
position: Vec3 { x: -6.0, y: 3.0, z: 3.0 },
..Default::default()
},
parse_obj(&read_to_string(Path::new(RESOURCE_DIR).join("cube.obj"))?)?
.to_mesh()?,
MaterialBuilder::new().ambient(YELLOW * 5.0).build(),
ShaderProgram::new()?,
MaterialFlags::builder().use_ambient_color(true).build(),
));
engine.spawn((Camera { current: true, ..Default::default() },));
engine.add_sole(GlobalLight::default())?;
engine.register_system(StartEvent, prepare_window);
engine.add_extension(RendererExtension::default());
engine.add_extension(
WindowExtension::default()
.window_title("Game")
.window_size(WINDOW_SIZE),
);
engine.add_extension(FlyCameraExtension(FlyCameraOptions {
camera_speed: 3.0,
mouse_sensitivity: 0.2,
}));
engine.add_extension(InputExtension::default());
engine.start();
Ok(())
}
fn prepare_window(window: Single<Window>)
{
window.set_cursor_mode(CursorMode::Disabled).unwrap();
}
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