Cesium 按区域生成高度图

  const cmd = new CustomDrawCommand({vertexArray,shaderProgram,commandType: 'Compute',outputTexture: bufferColor,uniformMap,postExecute: () => {const url = getImageByTexture(bufferAColor, gl);viewer.scene.primitives.remove(cmd);resolve(url);}});viewer.scene.primitives.add(cmd);