c++根据上表面的点，使用delaunay 三角剖分算法计算圆柱的体积，不适用cgal库

为了使用Delaunay三角剖分算法来计算圆柱的体积，我们首先需要确定表面的点，然后将这些点进行Delaunay三角剖分，最后计算Delaunay三角形的体积之和。 下面是一个简单的C++程序，用于计算圆柱的体积： ```cpp #include <iostream> #include <vector> #include <cmath> // Point structure to represent a point in 3D space struct Point { double x, y, z; }; // Function to calculate the volume of a tetrahedron using its vertices double tetrahedron_volume(Point p0, Point p1, Point p2, Point p3) { double volume = fabs((1.0 / 6.0) * ( p1.x * (p2.y * p3.z - p3.y * p2.z) + p2.x * (p3.y * p0.z - p0.y * p3.z) + p3.x * (p0.y * p2.z - p2.y * p0.z) - p0.x * (p2.y * p3.z - p3.y * p2.z) - p1.y * (p2.x * p3.z - p3.x * p2.z) - p2.y * (p3.x * p0.z - p0.x * p3.z) - p3.y * (p0.x * p2.z - p2.x * p0.z) + p0.y * (p2.x * p3.z - p3.x * p2.z) + p1.z * (p2.x * p3.y - p3.x * p2.y) + p2.z * (p3.x * p0.y - p0.x * p3.y) + p3.z * (p0.x * p2.y - p2.x * p0.y) - p0.z * (p2.x * p3.y - p3.x * p2.y) - p1.z * (p2.x * p3.y - p3.x * p2.y) - p2.z * (p3.x * p0.y - p0.x * p3.y) - p3.z * (p0.x * p2.y - p2.x * p0.y) + p0.z * (p2.x * p3.y - p3.x * p2.y) )); return volume; } // Function to calculate the volume of a cylinder using its surface points double cylinder_volume(std::vector<Point> points) { double total_volume = 0.0; for (int i = 0; i < points.size(); i += 3) { Point p0 = points[i]; Point p1 = points[i + 1]; Point p2 = points[i + 2]; Point p3 = {p0.x, p0.y, -p0.z}; // Bottom point double height = p1.z - p0.z; total_volume += tetrahedron_volume(p0, p1, p2, p3) * height; } return total_volume; } int main() { // Define the surface points of the cylinder std::vector<Point> points = { {0, 0, 0}, // Top center {1, 1, 1}, // Top point {1, -1, 1}, // Bottom point // Add more surface points as needed }; // Calculate the volume of the cylinder double volume = cylinder_volume(points); std::cout << "Volume of the cylinder: " << volume << std::endl; return 0; } ``` 此程序仅适用于圆柱体；如果需要计算其他形状（如圆锥体或其他不规则形状）的体积，需要相应地修改计算体积的函数。 [2024-10-29 16:35:54 | AI写代码神器 | 1604点数解答]