Dairy-Drift/src/scene/objects.rs

//! an Object Module for defining Objects
const SCR_WIDTH: u32 = 1600;
const SCR_HEIGHT: u32 = 900;

use cgmath::{Vector3, Quaternion, Rotation3};
use cgmath::prelude::*;
use crate::model::Model;
use crate::camera::Camera;

pub struct Input {
    pub Accel: bool,
    pub Decel: bool,
    pub Left: bool,
    pub Right: bool
}

impl Default for Input {
    fn default() -> Input {
        Input {
            Accel: false,
            Decel: false,
            Left: false,
            Right: false
        }
    }
}
pub struct Transform {
    pub Position: Vector3<f32>,
    pub Rotation: Quaternion<f32>,
    pub Velocity: Vector3<f32>,
    pub Scale: f32,
}

impl Default for Transform {
    fn default() -> Transform
        {
            Transform {
                Position: Vector3::<f32>::new(0.0, 0.0, 0.0),
                Rotation: Quaternion::from_angle_y(cgmath::Deg(0.0)),
                Velocity: Vector3::<f32>::new(0.0, 0.0, 0.0),
                Scale: 0.2,
            }

        }

}

impl Transform {
    pub fn setPos(&mut self, input: Vector3<f32>)
        {
            self.Position = input;
        }
}

pub struct Player {
    pub Transform: Transform,
    pub Model: Model
}

impl Player {
    pub fn new(gl: std::sync::Arc<glow::Context>) -> Self {
        Player {
            Transform: Transform::default(),
            Model: Model::new("resources/models/TestCarModel/CarW4.obj", gl),
        }
    }

    pub fn update(&mut self, input: &Input)
        {
            if input.Accel {
                self.forward(0.01);
            }
            if input.Decel {
                self.forward(-0.01)
            }

            if input.Left {
                self.turn(1.5)
            }
            if input.Right {
                self.turn(-1.5)
            }

            self.Transform.Position += self.Transform.Velocity;
            self.Transform.Rotation = self.Transform.Rotation.normalize();
        }
    pub fn forward(&mut self, amount: f32)
        {
            let forward = self.Transform.Rotation.rotate_vector(cgmath::Vector3::unit_z());
            let distance = forward * amount;
            self.Transform.Position += distance;

        }

    pub fn turn(&mut self, amount: f32)
        {
            let up = Vector3::<f32>::unit_y();
            let delta_rotation = Quaternion::from_axis_angle(up, cgmath::Deg(amount));
            self.Transform.Rotation = self.Transform.Rotation * delta_rotation;
        }
    pub fn Draw(&self, shader: &crate::shader::shader, camera: &Camera)
        {
            shader.Use();

            let translation = cgmath::Matrix4::from_translation(self.Transform.Position);
            let rotation = cgmath::Matrix4::from(self.Transform.Rotation);
            let scale = cgmath::Matrix4::from_scale(self.Transform.Scale);
            let model = translation * rotation * scale;

            let projection = cgmath::perspective(cgmath::Deg(camera.Zoom), SCR_WIDTH as f32 /SCR_HEIGHT as f32, 0.1, 100.0 );
            let view = camera.GetViewMatrix();
            shader.setMat4("projection", &projection);
            shader.setMat4("view", &view);

            shader.setMat4("model", &model);

            self.Model.Draw(shader);
        }
}