在 FLTK 中使用 GLUT [重复]

Posted 2023-02-21

【中文标题】在 FLTK 中使用 GLUT [重复]

【英文标题】：Using GLUT in FLTK [duplicate]

【发布时间】：2014-11-27 14:09:10

【问题描述】：

我的应用程序由常规的 FLTK 小部件（按钮等）和一个 OpenGL 窗口组成。我的意图是使用 GLUT 在这个 OpenGL 窗口中绘制。按照说明here：

您应该能够编译现有的 GLUT 源代码，包括 代替 。这可以通过编辑 源，通过将 -I 开关更改为编译器，或提供 从 GL/glut.h 到 FL/glut.H 的符号链接。

我也做了同样的事情，但出现以下链接错误：

1>Main.obj : error LNK2001: unresolved external symbol __imp__glClear@4
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glClear@4
1>Main.obj : error LNK2001: unresolved external symbol __imp__glClearColor@16
1>Main.obj : error LNK2001: unresolved external symbol __imp__glFlush@0
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glFlush@0
1>Main.obj : error LNK2001: unresolved external symbol __imp__glLoadIdentity@0
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glLoadIdentity@0
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glReadBuffer@4
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glDrawBuffer@4
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glOrtho@48
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glViewport@16
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glGetIntegerv@8
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__wglSwapLayerBuffers@8
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glCopyPixels@20
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glRasterPos2i@8
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glRasterPos2i@8
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__glDisable@4
1>fltkgl.lib(Fl_Gl_Window.obj) : error LNK2001: unresolved external symbol __imp__wglRealizeLayerPalette@12
1>fltkgl.lib(Fl_Gl_Choice.obj) : error LNK2001: unresolved external symbol __imp__wglShareLists@8
1>fltkgl.lib(Fl_Gl_Choice.obj) : error LNK2001: unresolved external symbol __imp__wglCreateContext@4
1>fltkgl.lib(Fl_Gl_Choice.obj) : error LNK2001: unresolved external symbol __imp__wglCreateLayerContext@8
1>fltkgl.lib(Fl_Gl_Choice.obj) : error LNK2001: unresolved external symbol __imp__wglMakeCurrent@8
1>fltkgl.lib(Fl_Gl_Choice.obj) : error LNK2001: unresolved external symbol __imp__wglDeleteContext@4
1>fltkgl.lib(Fl_Gl_Device_Plugin.obj) : error LNK2001: unresolved external symbol __imp__glPopClientAttrib@0
1>fltkgl.lib(Fl_Gl_Device_Plugin.obj) : error LNK2001: unresolved external symbol __imp__glReadPixels@28
1>fltkgl.lib(Fl_Gl_Device_Plugin.obj) : error LNK2001: unresolved external symbol __imp__glPixelStorei@8
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glPixelStorei@8
1>fltkgl.lib(Fl_Gl_Device_Plugin.obj) : error LNK2001: unresolved external symbol __imp__glPushClientAttrib@4
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glListBase@4
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glGenLists@4
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glDeleteLists@8
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glCallLists@12
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__wglUseFontBitmapsW@16
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glRasterPos2f@8
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glEnd@0
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glVertex2i@8
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glBegin@4
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glColor3ub@12
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glIndexi@4
1>fltkgl.lib(gl_draw.obj) : error LNK2001: unresolved external symbol __imp__glDrawPixels@20
1>D:\Skunkworks\Snake3D\Snake3D\Release\Snake3D.exe : fatal error LNK1120: 35 unresolved externals

当我使用 FreeGLUT 时，程序正在正确编译。在更改标题以使用 FLTK 的 GLUT 版本后，我遇到了这些问题。我正在使用 Microsoft Visual Studio 10，并将以下静态库添加为“附加依赖项”：

freeglut.lib glew32.lib fltk.lib fltkgl.lib

我做错了什么？另外，如何使用 GLUT 在我的 Fl_Gl_Window 中绘制？

这是我的程序：

// Make the GUI here
#define WIN32
#include <GL/glew.h>
#include <FL/glut.H>
#include <FL/glu.h>
#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Color_Chooser.H>
#include <FL/Fl_Gl_Window.H>
#include <FL/Fl_Menu_Bar.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Button.H>

class Block

public:
    Block(int x, int y, int z)
    
        xyz[0] = x;
        xyz[1] = y;
        xyz[2] = z;
    

    int getX() return xyz[0];
    int getY() return xyz[1];
    int getZ() return xyz[2];

    void setX(int x) xyz[0]=x;
    void setY(int y) xyz[1]=y;
    void setZ(int z) xyz[2]=z;

private:
    int xyz[3];
;

// Snake is an array blocks.
Block* snake;
// Mouse is a single block
Block* mouse;

class GlWindow : public Fl_Gl_Window

public:
    // Call back for draw
    void draw()
    
        // Get the current state of the universe and draw it
        glClearColor(1.0f, 1.0f, 1.0f, 1.0f); // Clear the background of our window to red  
        glClear(GL_COLOR_BUFFER_BIT); //Clear the colour buffer (more buffers later on)  
        glLoadIdentity(); // Load the Identity Matrix to reset our drawing locations  

        //glutSolidCube(5);
        glFlush(); // Flush the OpenGL buffers to the window  
    

    // To handle key-events
    void handle()
    
    

    // Constructor
    GlWindow(int X, int Y, int W, int H, const char* L=0): Fl_Gl_Window(X,Y,W,H,L)
    
    

;

void buildGUI(int argc, char** argv)

    // Main Window  
    Fl_Double_Window *window = new Fl_Double_Window(800,500);
    window->label("Snake3D");
    window->color(FL_LIGHT3);
    window->begin();

    // Menu Bar
    Fl_Menu_Bar* menubar = new Fl_Menu_Bar(0,0,800,30);
    menubar->color(FL_LIGHT3);
    menubar->down_color(fl_rgb_color(0,145,255));
    menubar->box(FL_THIN_UP_BOX);
    menubar->add("File/Exit");
    menubar->add("Help/About");

    // OpenGL Window
    GlWindow* gameWindow = new GlWindow(200,30,600,470);

    // Start Button
    Fl_Button* startButton = new Fl_Button(50,200,100,30,"Start");
    Fl_Button* pauseButton = new Fl_Button(50,300,100,30,"Pause");
    window->show();
    window->end();
    Fl::run();


int main(int argc, char ** argv)
   
    // Build GUI
    buildGUI(argc,argv);

【参考方案1】：

这与 GLUT 无关。

所有这些函数都是 OpenGL 1.1 和特定于 Windows 的窗口系统 API (WGL) 的一部分。

要解决此问题，只需将 opengl32.lib 添加到您的库中即可。

但是，几乎所有这些功能都已被弃用，如果担心可移植性，您可能会考虑寻找 FLTKGL 的现代替代品。