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servo / euclid

Geometry primitives (basic linear algebra) for Rust
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Add a Points iterator for Rect and Box #389

Closed pbor closed 2 years ago

pbor commented 4 years ago

It would be cool to be able iterate on points of a rectangle.

nical commented 4 years ago

I'd welcome both having a way to iterate over the corners and over points (or sub-rectangles) inside the rectangle.

Something like:

    /// Iterates over the corners in top-left (min), top-right, bottom-right (max), bottom-left order (matching CSS).
    fn corners(&self) -> Corners2D<T, U> {
       ...
    }

    /// Iterates over sub-rects contained in this one, from left to right and top to bottom.
    fn tiles(&self, origin: Point2D<T, U>, size: Size2D<T, U>) -> Tiles2D<T, U> {
        ...
    }

Where Corners2D<T, U> would implement Iterator<Item=Point<T, U>> and and Tiles2D<T, U> would implement Iterator<Item=Box2D<T, U>>. The latter would be useful in WebRender, we can more or less move WebRender's implementation here.