~starkingdoms/starkingdoms

ref: aa2aadee626d8d90bc9fb67699cda2a588a6a992 starkingdoms/starkingdoms-client/src/ecs.rs -rw-r--r-- 1.4 KiB
aa2aadee — core switch to matricies for sprite positioning 11 months ago 
                                                                                
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use bevy_ecs::bundle::Bundle;
use bevy_ecs::component::Component;
use bevy_ecs::system::Resource;
use nalgebra::Matrix3;

#[derive(Component, Debug, Clone, Copy)]
pub struct Translation {
    pub x: f32,
    pub y: f32,
}
impl Translation {
    pub fn as_matrix(&self) -> Matrix3<f32> {
        Matrix3::from_iterator([
            1.0, 0.0, 0.0,
            0.0, 1.0, 0.0,
            self.x, self.y, 1.0,
        ])
    }
}

#[derive(Component, Debug, Clone, Copy)]
pub struct Scale {
    pub width: f32,
    pub height: f32,
}
impl Scale {
    pub fn as_matrix(&self) -> Matrix3<f32> {
        Matrix3::from_iterator([
            self.width, 0.0, 0.0,
            0.0, self.height, 0.0,
            0.0, 0.0, 1.0
        ])
    }
}
#[derive(Component, Debug, Clone, Copy)]
pub struct Rotation {
    pub radians: f32
}
impl Rotation {
    pub fn as_matrix(&self) -> Matrix3<f32> {
        let x = self.radians.cos();
        let y = self.radians.sin();
        Matrix3::from_iterator([
            x, y, 0.0,
            -y, x, 0.0,
            0.0, 0.0, 1.0
        ])
    }
}

#[derive(Component, Debug, Clone)]
pub struct SpriteTexture {
    pub texture: String,
}

#[derive(Bundle)]
pub struct SpriteBundle {
    pub position: Translation,
    pub scale: Scale,
    pub texture: SpriteTexture,
    pub rotation: Rotation
}

#[derive(Resource, Debug)]
pub struct Camera {
    pub x: f32,
    pub y: f32,
    pub zoom: f32,
}