翻译一下%% EXAMPLE 1.- How to cut a sphere and close the base to get a semisphere % load an ascii STL sample file (STLGETFORMAT and STLREADASCII) [vertices,faces,normals,name] = stlRead('sphere_ascii.stl'); stlPlot(vertices,faces,name); % the sphere is centered in the origin % now we get a list of vertices to be deleted if (x,y,z<0) minZ = 0; [rows, ~] = find(vertices(:,3) < minZ); list = vertices(rows,:); % if we delete the list of vertices with z<0, we get an opened semisphere % (as the base is not closed) [newv,newf] = stlDelVerts(vertices,faces,list); stlPlot(newv,newf,name); % the next step is to identify a new list with the faces that are opened % (that means all the sides that belong only to a unique triangle) list = stlGetVerts(newv,newf,'opened'); % finally we generate all the new faces that are needed just to close the % base of the semisphere [vsemi,fsemi] = stlAddVerts(newv,newf,list); stlPlot(vsemi,fsemi,'closed semisphere');
时间: 2023-06-24 13:09:02 浏览: 44
示例1:如何切割一个球体并关闭底部以获得半球体
%加载一个ASCII格式的STL样本文件(STLGETFORMAT和STLREADASCII)
[vertices,faces,normals,name] = stlRead('sphere_ascii.stl');
stlPlot(vertices,faces,name);%将球体居中于原点
%现在我们获取一个顶点列表,以便删除它们
if (x,y,z<0)
minZ = 0;
[rows, ~] = find(vertices(:,3) < minZ);
list = vertices(rows,:);
end
%如果我们删除具有z<0的顶点列表,我们将得到一个打开的半球体
%(因为底部没有关闭)
[newv,newf] = stlDelVerts(vertices,faces,list);
stlPlot(newv,newf,name);
%下一步是识别一个新的面列表,这些面是打开的
%(即属于唯一三角形的所有侧面)
list = stlGetVerts(newv,newf,'opened');
%最后,我们生成所有必要的新面来关闭半球体的底部
[vsemi,fsemi] = stlAddVerts(newv,newf,list);
stlPlot(vsemi,fsemi,'closed semisphere');
相关问题
Output argument "sphere" (and possibly others) not assigned a value in the execution with "runica" function.
This error message typically indicates that the output argument "sphere" in the "runica" function has not been assigned a value. The "runica" function is a built-in function in MATLAB for computing the independent components of a multivariate signal.
To resolve this error, you should check that you have provided all the necessary input arguments for the "runica" function, including the input data matrix, the number of independent components to extract, and any optional parameters. Additionally, you should make sure that the output argument "sphere" is properly defined and initialized before calling the "runica" function.
If you continue to experience this error, you may want to consult the MATLAB documentation for more information on using the "runica" function, or seek assistance from the MATLAB community or a qualified MATLAB expert.
1. Construct a class named sphere that has a double-precision data member named radius. The class should have the following class functions: i. A constructor with the default values of 1 for radius data member. ii. An accessor function named showData() that displays a sphere’s radius. iii. A mutator function named setData() to set a sphere’s radius. iv. A class function named surfaceArea() that calculates and displays a sphere’s surface area. v. A class function named volume() that calculates and displays a sphere’s vol
ume.
Here's an example implementation of the sphere class in C++:
```c++
#include <iostream>
#include <cmath>
class sphere {
private:
double radius;
public:
sphere() {
radius = 1.0;
}
void showData() {
std::cout << "Sphere radius: " << radius << std::endl;
}
void setData(double r) {
radius = r;
}
double surfaceArea() {
return 4 * M_PI * radius * radius;
}
double volume() {
return 4.0 / 3.0 * M_PI * pow(radius, 3);
}
};
int main() {
sphere mySphere;
mySphere.showData();
mySphere.setData(2.0);
std::cout << "Sphere surface area: " << mySphere.surfaceArea() << std::endl;
std::cout << "Sphere volume: " << mySphere.volume() << std::endl;
return 0;
}
```
In this implementation, the sphere class has a private data member `radius` and five public member functions:
- A default constructor that initializes the `radius` to 1.0.
- An accessor function `showData()` that displays the current value of `radius`.
- A mutator function `setData()` that sets the value of `radius`.
- A class function `surfaceArea()` that calculates and returns the surface area of the sphere.
- A class function `volume()` that calculates and returns the volume of the sphere.
In the `main()` function, we create a `sphere` object `mySphere`, display its initial radius using the `showData()` function, set its radius to 2.0 using the `setData()` function, and then display its surface area and volume using the `surfaceArea()` and `volume()` functions, respectively.
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