| 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.
返回一个二维的高度贴图样本数组。样本使用范围从 0 到 1 的浮点值表示。该数组具有维度 [height,width]，其索引为 [y,x]。