| xBase | First x index of heightmap samples to retrieve. |
| yBase | First y index of heightmap samples to retrieve. |
| width | Number of samples to retrieve along the heightmap's x axis. |
| height | Number of samples to retrieve along the heightmap's y axis. |
Get an array of heightmap samples.
Returns a two dimensional array of heightmap samples. The samples are represented as float values ranging from 0 to 1. The array has the dimensions [height,width] and is indexed as [y,x].