Change units to virtual pixels

[drobilc]

Instead of using percentage units, we should use virtual pixels to draw our rooms and items, allowing players to create rooms that are not square.

We should also add multiple scaling options, for example Scaling.REAL, which would mean that each virtual pixel is exactly one real pixel, Scaling.FILL_PARENT to stretch the room to it's parent canvas size, etc.

[hostops]

I think that it would make framework much more complex to use and to maintain. It could be useful pro feature - for those who want more. But this framework is meant for kids. When you want more than it offers, you can simply write your own functions in JavaScript . We can give them convert functions that helps them do that:
game.addAngryRobot(pixelsToPercents(224));
Not squared rooms could exists but best would be in way with percents.
new Room(0.5, 0.5);
Or with direct pixels:
new Room(pixelsToPercents(250), pixelsToPercents(250));
But maintaining project where you will have to support multiple options, scaling and virtual pixels would be painful.