我有以下头文件:
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <GL/glew.h>
#include <GL/glfw.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <stdlib.h>
#include <vector>
class Sphere
{
public:
Sphere();
int count_sphere_vertices(int ,int, int);
Vertex* create_sphere(int ,int , int);
};
现在,当我编译我的代码时,我得到了这个:
Sphere.h:18:3: error: ‘Vertex’ does not name a type
Sphere.cpp:48:1: error: ‘Vertex’ does not name a type
和
test_1.cpp: In function ‘int main()’:
test_1.cpp:318:38: error: ‘class Sphere’ has no member named ‘create_sphere’
什么是
‘Vertex’ does not name a type
是什么意思?为什么我得到 p>
‘class Sphere’ has no member named ‘create_sphere’
因为我的 Sphere.cpp 中有这个:
//Calculating points for the sphere (the algorithm is implemented here)
Vertex* Sphere::create_sphere(int dtheta,int dphi, int no_vertices)
{
GLdouble x,y,z,x2,y2,z2;
GLdouble magnitude=0;
int n=-1;
int theta,phi;
const double PI = 3.1415926535897;
GLdouble DTOR = (PI/180);//degrees to radians
Vertex* sphere_vertices = new Vertex[no_vertices];
for (theta=-90;theta<=90-dtheta;theta+=dtheta) {
for (phi=0;phi<=360-dphi;phi+=dphi) {
//calculating Vertex 1
x = cos(theta*DTOR) * cos(phi*DTOR);
y = cos(theta*DTOR) * sin(phi*DTOR);
z = sin(theta*DTOR);
n+=1;
sphere_vertices[n].position[0] = x;
sphere_vertices[n].position[1] = y;
sphere_vertices[n].position[2] = z;
//calculating Vertex 2
x = cos((theta+dtheta)*DTOR) * cos(phi*DTOR);
y = cos((theta+dtheta)*DTOR) * sin(phi*DTOR);
z = sin((theta+dtheta)*DTOR);
n+=1;
sphere_vertices[n].position[0] = x;
sphere_vertices[n].position[1] = y;
sphere_vertices[n].position[2] = z;
//calculating Vertex 3
x = cos((theta+dtheta)*DTOR) * cos((phi+dphi)*DTOR);
y = cos((theta+dtheta)*DTOR) * sin((phi+dphi)*DTOR);
z = sin((theta+dtheta)*DTOR);
n+=1;
sphere_vertices[n].position[0] = x;
sphere_vertices[n].position[1] = y;
sphere_vertices[n].position[2] = z;
//adding Vertex_1 again to divide the Quad into 2 triangles so it can be later filled with triangles!!!
//adding Vertex 1 again!
x = cos(theta*DTOR) * cos(phi*DTOR);
y = cos(theta*DTOR) * sin(phi*DTOR);
z = sin(theta*DTOR);
n+=1;
sphere_vertices[n].position[0] = x;
sphere_vertices[n].position[1] = y;
sphere_vertices[n].position[2] = z;
if (theta > -90 && theta < 90) {
//calculating Vertex 4
x = cos(theta*DTOR) * cos((phi+dphi)*DTOR);
y = cos(theta*DTOR) * sin((phi+dphi)*DTOR);
z = sin(theta*DTOR);
n+=1;
sphere_vertices[n].position[0] = x;
sphere_vertices[n].position[1] = y;
sphere_vertices[n].position[2] = z;
}
}
}
//Setting the color
for(int i=0; i<no_vertices; i+=1)
{
sphere_vertices[i].color[0] = 1;
sphere_vertices[i].color[1] = 0;
sphere_vertices[i].color[2] = 0;
}
printf("%d >> \n", n);
return sphere_vertices;
}
谢谢
编辑: 这包含在我的“主要”方法所在的 test_1.cpp 中。
#include "Sphere.h"
#include "Terrain.h"
using namespace std;
//Vertex Structure
struct Vertex {
GLdouble position[3];
GLfloat color[3];
GLfloat texture[2];
};
然后我像这样创建一个球体
sphere_vertices_final = planet_1->create_sphere(5,5,no_sphere_vertices);
我应该如何在 Sphere.h 文件中包含 Vertex?
最佳答案
这意味着编译器不知道什么是Vertex
。它未在您包含的任何头文件中定义(或未正确定义)。因此,试图返回一个指针的函数也不能被编译。
因为您只在头文件中处理指向 Vertex
的指针,所以您可以转发声明该类:
class Vertex;
class Sphere
{
public:
// ...
...但是,在访问类的任何方法或其他成员之前,您必须在 cpp 文件中包含正确的定义。
关于c++ - C++ 中的“未命名类型”错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8802682/