Import Soul Wouldn’t it be nice if things just worked

21Feb/111

Weeks Unknown – Scaling Troubles

After many disruptions, holidays and general laziness i finally got around to doing some more work on Saga of Sol. To start off the term i had begun setting up the framework and basics of the local planet view. This is the view that when you are playing the game you are going to spend the most time in, building your armies and crushing your foes, and so on and so forth.

However not long into the programming i hit the barrier of software surface transformations. The simple effect being that when zoomed out a long way or scrolling quickly. Looking around at getting pygame to correctly take advantage of hardware surfaces, i quickly found that the general consensus is, dont bother and i got redirected to pyglet.

Pyglet is another python graphics library based around opengl and makes good use of hardware surfaces by default. In learning pylet i stumbled upon some basic guides on game desgin and another guide that provides a basic camera class for me to base my scrolling and zooming upon.

After lots of modification i have got to a point where one is able to zoom in and out towards a point on a map and scroll around in general RTS style. More difficult was trying to convert between screen and opengl (world) coordinates so you are able to identify whereabouts in game space your cursor is.

A screen-cap of the running trial, the scribble is made by moving the mouse to show correct conversion between screen and opengl coordinates

I will hopefully have some code up soon for those that are interested, as soon as it is tidied up and commented

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  1. Looking good! Can’t wait to see what you add to it next!


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