| xBase | First index of heightmap samples to retrieve along the Terrain's x axis. |
| yBase | First index of heightmap samples to retrieve along the Terrain's z axis. |
| width | Number of samples to retrieve along the Terrain's x axis. |
| height | Number of samples to retrieve along the Terrain's z axis. |
Gets 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].