TerrainGeneration

From OpenCity

State of Art

• Heightmaps
• Hill Algorithm
• Subdivide and Displace
• Fault Formation
• Perlin Noise

Implementation

An abstract base class for TerrainGenerator, and at lest inherited by

• a generator
• an heightmap file loader

Plus tools like

• nomalizator(min, mix): shift, and re-range the map height, able to set probabilistic percent of water.

minL, maxL = getMinMax(map);
a = (max-min) / (maxL-minL);
b = -minL*a+min;
place = a*(place-minL)+min

• flattenizator(coef): flattern the plains, and raise contrast with hills

min, max = getMinMax(map);
coef = max-min;
place = (((place-min)/coef)^power)*coef+min

• gaussian blur: smoth and lowlevel filter
• flooding
• rivers/lakes calculator
• and maybe some singularity generators (crater, caldera, ...).