Cesium JS API
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TridiagonalSystemSolver

TridiagonalSystemSolver是一个用于解决三对角线性方程组的Cesium插件。它可以帮助您在Cesium场景中计算复杂的三维模型和图形,并且在其中使用三对角线性方程组。

安装

您可以通过以下方式将TridiagonalSystemSolver添加到您的Cesium项目中:

  1. 通过CDN:

    <script src="https://unpkg.com/cesium-tridiagonal-system-solver@x.x.x/CesiumTridiagonalSystemSolver.js"></script>
    

    x.x.x替换为插件的版本号。

  2. 下载插件:

    您也可以从GitHub存储库下载插件,并将CesiumTridiagonalSystemSolver.js文件添加到您的项目中。

使用

创建solver

要使用TridiagonalSystemSolver,您需要创建一个solver对象:

const solver = new Cesium.TridiagonalSystemSolver();

设置方程组

接下来,您需要将三对角矩阵和右侧向量添加到solver中:

solver.setMatrix(matrix);
solver.setRightVector(vector);

其中,matrix是一个二维数组,代表三对角矩阵。例如:

const matrix = [
  [1, 2, 0, 0],
  [3, 4, 5, 0],
  [0, 6, 7, 8],
  [0, 0, 9, 10]
];

vector是一个一维数组,代表右侧向量。例如:

const vector = [10, 32, 23, 18];

解决方程组

现在,您可以使用solve方法来解决三对角线性方程组:

const solution = solver.solve();

solution是一个一维数组,代表三对角线性方程组的解。

完整示例

以下是一个使用TridiagonalSystemSolver计算三维空间中两点之间的距离的示例:

const startPoint = Cesium.Cartesian3.fromDegrees(-73.985664, 40.748817, 0);
const endPoint = Cesium.Cartesian3.fromDegrees(-73.977680, 40.756081, 0);

const distance = Cesium.Cartesian3.distance(startPoint, endPoint);

const matrix = [
  [2, -1, 0],
  [-1, 2, -1],
  [0, -1, 2]
];

const vector = [
  startPoint.x - (distance ** 2) / 2,
  endPoint.x - (distance ** 2) / 2,
  0
];

const solver = new Cesium.TridiagonalSystemSolver();
solver.setMatrix(matrix);
solver.setRightVector(vector);

const solution = solver.solve();

const height = (distance ** 2) / 2 - solution[0] * (solution[1] - solution[0]) / 2;

console.log(height);

API文档

TridiagonalSystemSolver()

构造函数,返回一个新的solver对象。

setMatrix(matrix)

设置三对角矩阵,matrix是一个二维数组。

setRightVector(vector)

设置右侧向量,vector是一个一维数组。

solve()

解决三对角方程组,返回解,它是一个一维数组。

常见问题解答

如何解决非三对角线性方程组?

TridiagonalSystemSolver仅限于解决三对角线性方程组。如果您需要解决非三对角线性方程组,请考虑使用其他插件或算法。

setMatrixsetRightVector是否可以在solve方法之后调用?

不可以。这两个方法必须在调用solve方法之前调用,否则solve方法将引发异常。

该插件是否适用于浏览器环境和Node.js环境?

是的。TridiagonalSystemSolver既适用于浏览器环境,也适用于Node.js环境。

结论

TridiagonalSystemSolver是一个优秀的Cesium插件,可以帮助您解决三对角线性方程组。它是一个灵活和易于使用的工具,适用于广泛的应用程序。我们希望您能在Cesium项目中发挥它的所有潜力。