Eco Panel

Overview of your economy.

TODO

• scrolling
• show build queue
• make icons interactive (so we can select/deselect factories via panel)
• update panel when stuff changes trough other means (mainly the original UI, but also e.g. due to enemy action)
• show and control assisting engies
• show ressource consumption

Pie Chart Renderer

The UI layer of Supreme Commander does not support anything other than textured rectangles. Therefore, drawing pie-slices with diagonal and round edges can only be accomplished through some workarounds.

The way it is implemented here, is by stretching and overlaying triangle textures in such a way that it results in triangles with the correct angles. A simple masking texture (black with a transparent circle in the middle) on top of it all provides the circular shape.

Limitations:

• The "background", i.e. the area outside the chart that is still inside its bounding box is not transparent. And if you want it to be a different color there you need another texture.
• Dynamically coloring a texture isn't supported, so there must be a texture for every color you want to have in your chart. So far, there are 9 different ones that will be repeated if necessary.
• It's not pixel-perfect. Not sure if something is wrong with the math or if this is just due to way this works and how textures are strechted and overlaid.
• The current implementation is limited to a bit less than 50 segments due to a small hack. This could easily be fixed if required.

TODO:

• Draw diagonal lines out from segments to some textboxes. Probably in a second class.
• Implement interactivity (hover, select), both via mouse and via API (so that for example you can highlight something in the chart based on your currently selected unit). Add callbacks.