This project creates cities with random roads layout and random, procedurally generated buildings with use of Perlin Noise.
City layout is generated by firstable using crawler which is randomly choosing to go straight or to turn in one of the directions and placing suitable piece of road in this position. After that, overlapping road pieces are swapped with a correct crossroad. Then generator is searching between the roads for a place to build structure which are being created with use of Perlin Noise as a grid of vertical buildings with different heights made from modular elements.
To optimize large amount of objects in the scene I used meshes combining.
As a result, the number of draw calls decreased drastically.
The most significant change however, was adding a custom dynamic occlusion culling,
which enables mesh renderers for only visible objects
(not occluded by other objects and within the camera's field of view).
It has been implemented by shooting fixed number of raycasts from current
camera position, enabling hitted objects and hiding them again after
fixed amount of time without being hitted. In order to increase the optimisation even further,
it is advised to not create additional building parts within the structures.
