Procedural Moonbase

Having reached the end of UCSD’s Intro to Computer Graphics course, I have been tasked with creating a real-time demo that implements a subset of features covered in the class. Today is the first of three posts about the progress of this project.

For this project myself (Chris Tetreault) and my partner Andrew Buss will be implementing 4 features:

  • Procedurally modelled city
  • Procedurally modelled buildings
  • Procedurally generated terrain
  • Procedurally generated “plants” with L-systems

With all of these, we’ll be creating a procedurally generated moon base. First, we will generate a landscape, and carve out a flat spot for the base. Next, we will generate a city, which consists of a procedurally generated layout populated by procedurally generated buildings. Finally, we will procedurally generate doodads to be placed on the landscape throughout the undeveloped portion of the terrain.

All of this will be implemented in modern C++ with modern OpenGL.

Terrain and “Plants”

This portion of the project is coming along nicely. We are currently generating the landscape, with the exception of textures. We currently have the surface normals set as the pixel color in the fragment shader.

Procedurally Generated landscape

At some elevation lower than the city, I plan to add lava. Additionally, I plan to have two land based-textures that I will select between based on the elevation gain. Likely, this will be a smooth rock texture for steep hills, and gravel for flatter areas.

After completing this, I will use L-systems to generate stuff to put on the landscape. This will likely take the form of geological formations, such as rocks or lava flows as one isn’t likely to find trees on a blasted lunar wasteland.

Cities and Buildings

For the city portion, we’ll be procedurally generating moon base buildings. We decided to go with the moon base, as opposed to a traditional city because we felt this could give us more creative freedom to do what we want. After all; if the task is to procedurally generate a “City”, how many urban downtown areas are you likely to see?

This portion of the project is still in the planning phase, so expect to see more on this next week.

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