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/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
use std::f32::consts::PI;
use stockton_input::{Axis, InputManager, Mouse};
use stockton_types::components::Transform;
use stockton_types::Vector3;
use crate::delta_time::Timing;
pub trait FlycamInput {
fn get_x_axis(&self) -> &Axis;
fn get_y_axis(&self) -> &Axis;
fn get_z_axis(&self) -> &Axis;
}
pub struct FlycamControlled {
pub speed: f32,
pub sensitivity: f32,
}
impl FlycamControlled {
pub fn new(speed: f32, pixels_per_360: f32) -> Self {
FlycamControlled {
speed,
sensitivity: (2.0 * PI) / pixels_per_360,
}
}
}
#[system(for_each)]
pub fn flycam_move<T>(
#[resource] manager: &T,
#[resource] timing: &Timing,
#[resource] mouse: &Mouse,
transform: &mut Transform,
flycam: &FlycamControlled,
) where
T: 'static + InputManager,
T::Inputs: FlycamInput,
{
let inputs = manager.get_inputs();
let delta = Vector3::new(
**inputs.get_x_axis() as f32 * flycam.speed * timing.delta_time,
**inputs.get_y_axis() as f32 * flycam.speed * timing.delta_time,
**inputs.get_z_axis() as f32 * flycam.speed * timing.delta_time,
);
transform.translate(delta);
let rotation = mouse.delta * flycam.sensitivity;
transform.rotate(Vector3::new(-rotation.y, rotation.x, 0.0));
}
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