Theme was announced, but had no idea what to make. I remembered to have read something about sweep algorithm to generate shadows.

Investigating.

Here some links:

Day 2

Starting to implement some infrastructure like scene management.

Found some resource about how the shadows can be generated. Made an implementation that worked fine with single segments.

Day 3

Found out that the implementation I had to generate the shadows had a n**2 runtime complexity and could not handle segment points on the same coordinates (which one typically has if describing a polygon by single segments). So back to field one.

Day 4

Struggling all day to implement the the sweep algorithm.

Day 5

Finally found out that I could sweep twice to setup the initial conditions. After that I had to capture all the special cases that could occur too. Took me all the time I had this day. But finally I had an implementation that was fast and could handle double points correctly.

Day 6

Implement the light effect, player steering. Also a view bounding box for the sweep algorithm. To remove visual glitches I had to split all segments that intersect the view bounding box and the box edges as well.

Day 7

Struggling to design the cove and with collision detection once again. Its not perfect but works most of the time. At the end I implemented a simple point and click capturing to generate the segments data. Polishing a bit.

Summary

Its not quite a game because there is no win nor a loose condition. So at the end its more like tech demo about lighting/shadows. After all I had fun and learned about all the details of the sweep algorithm.