参考二维数组 [英] Reference to a Two-Dimesional Array

问题描述

我想使用OpenGL实现一个函数来渲染C ++中的圆柱。我的函数的签名如下：

I want to implement a function with OpenGL to render a cylinder in C++. The signature of my function is as follows:

#define POINTS_NUM  15
#define DEMESION    3

void drawCylinder( int slices, int segments, GLfloat (&vertices)[ POINTS_NUM ][ DEMESION ] );

我想使用一个二维数组的引用来限制用户输入，正在发生。当我实现上面声明的函数时，发生链接器错误：

I want to use a reference to a two-dimensional array to limit user input, but some strange behavior is happening. When I implement the function declared as above, an linker error occurs:

错误1错误LNK2005：float

Error 1 error LNK2005: "float (* vase)[3]" (?vase@@3PAY02MA) already defined in shapes.obj vase.obj VaseAndAnimation

在花瓶定义为：

GLfloat vase[ POINTS_NUM ][ DEMESION ];

首先，我认为最后一个维度有问题。所以我在我的第二次试验中省略了。这个时间声明我的函数是这样的：

At first, I thought there was something wrong with the last dimension. So I omitted it in my second trial. This time declaration of my function is like this:

void drawCylinder( int slices, int segments, GLfloat (&vertices)[ POINTS_NUM ][] );

现在，当调用（ vase 定义不变）：

Now a compile-time error occurs when invoked as (vase definition isn't changed):

drawCylinder( 10, 10, vase );

编译错误：

错误1错误C2087：'vertices'：缺少下标d：\visual studio 2008\projects\project1\computer graphics\vaseandanimation\shapes.h 25 VaseAndAnimation

Error 1 error C2087: 'vertices' : missing subscript d:\visual studio 2008\projects\project1\computer graphics\vaseandanimation\shapes.h 25 VaseAndAnimation

错误2错误C2664：'drawCylinder'：无法将参数3从'GLfloat [14] [3]'转换为'GLfloat（&）[14] [1]'d：\Visual Studio 2008 \Projects\Project1\Computer Graphics\VaseAndAnimation\vase.cpp 64 VaseAndAnimation

Error 2 error C2664: 'drawCylinder' : cannot convert parameter 3 from 'GLfloat [14][3]' to 'GLfloat (&)[14][1]' d:\Visual Studio 2008\Projects\Project1\Computer Graphics\VaseAndAnimation\vase.cpp 64 VaseAndAnimation

错误3错误C2087：'vertices'：缺少下标d： \\visual studio 2008\projects\project1\computer graphics \vaseandanimation\shapes.h 25 VaseAndAnimation

Error 3 error C2087: 'vertices' : missing subscript d:\visual studio 2008\projects\project1\computer graphics\vaseandanimation\shapes.h 25 VaseAndAnimation

错误4错误C2087：'vertices'：missing subscript d：\Visual Studio 2008 \Projects\Project1\Computer Graphics \VaseAndAnimation\shapes.cpp 12 VaseAndAnimation

Error 4 error C2087: 'vertices' : missing subscript d:\Visual Studio 2008\Projects\Project1\Computer Graphics\VaseAndAnimation\shapes.cpp 12 VaseAndAnimation

从这个错误，我可以看到参数 vertices 实际上是对二维数组的引用，但为什么 vase 在我的第一个版本中解析为 float（* vase）[3] ？

From this error, I can see that parameter vertices is really treated a reference to a two-dimensional array, but why is vase parsed as float (* vase)[3] in my first version?

我没有尝试过GCC;是行为编译器依赖？

My IDE is Visual Studio 2008. I haven't tried it with GCC; is that behavior compiler-dependent?

希望有人能给我一只手来摆脱陷阱。

Hope someone can give me a hand to get rid of the trap.

推荐答案

您的第一个声明很好。似乎是您已在头文件中定义 vase 。

Your first declaration is fine. Seems to be you have defined vase in a header file.

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