clampZoomPercent?

[davidfig]

clampZoomPercent?

[Shatterbrain]

I think that would have worked, but I ended up settling on something that I thought was better for user experience. I'll share it here for anyone else interested in locking the user to certain scales:

const snapZoomDefault = () => {
    const snapPoints = [0.5, 1, 2, 3];
    const currentScale = this.viewport.scale.x;
    const snapScale = snapPoints.reduce((prev, curr) => 
        Math.abs(curr - currentScale) < Math.abs(prev - currentScale) ? curr : prev
    );
    this.viewport.snapZoom({
        width: this.viewport.screenWidth / snapScale,
        time: 500,
    });
};
this.viewport.on("pinch-end", () => {
    snapZoomDefault();
});

This lets the user resize freely, then snaps them to a nice-looking scale afterward. Has the secondary effect of a 'soft clamp', letting them temporarily zoom things in/out to get a look before it goes back to a more playable scale.

Thanks for your work on this excellent library.

[davidfig]

Can't you just call it like this:

var worldWidth = 100;
var worldHeight = 100;
new Viewport({ worldWidth, worldHeight })
   .clampZoom({ minWidth: worldWidth / 2, minHeight: worldHeight / 2, maxWidth: worldWidth * 2, maxHeight: worldHeight * 2 });

Or is your world size changing often that you prefer this is automated?