Property:Average Offspring Per Birth

The number of offspring that non-egg-laying animals have is determined by a probability density function that is defined by straight lines connecting a series of points from the animal's defs file.

For example, the capybara has a litter size curve with points:

• (0.5, 0)
• (1, 1)
• (1.5, 1)
• (2, 0)

This works out to a 25% chance of the number of offspring being in the range 0.5-1, 50% chance of the range 1-1.5, and 25% chance of the range (1.5-2). After rounding, this results in a 75% chance of 1 offspring and a 25% chance of 2 offspring, for an average of 1.25 offspring.