Public Transformation Matrices / Transforms

[ua-kxie]

Currently, the canvas::Frame support transformations through methods such as translate, rotate, and scale. These methods simply call the relevant matrix transformation on the underlying Transform2D. For example:

pub fn translate(&mut self, translation: Vector) {
    self.transforms.current.raw = self
        .transforms
        .current
        .raw
        .pre_translate(lyon::math::Vector::new(
            translation.x,
            translation.y,
        ));
    self.transforms.current.is_identity = false;
}

I think it would be valuable to have the ability to work with matrices directly. The advantages of doing this being:

• easier to work with, provided users have working knowledge
• automatically adds the shear transformation
• Inverse transforms to undo/reverse projections
• allow users to save and set transforms with custom logic. (the with_save() method may become unnecessary)

I'm experimenting with this on a fork but I'm not sure what the best implementation strategy is. Re-export lyon's Transform2D? create a Transform for iced implementing from against Transform2D?

[ua-kxie]

Just want to update that I'm no longer experimenting with anything. Atm I am transforming points before drawing them onto frame.