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我想在OpenGL中編程。Fedora 15上的OpenGL
所以寫了一個測試程序調用t_gl1.cpp
我
$ G ++ t_gl1.cpp -lglut -lGL -lGLU -o t_gl1
沒有任何錯誤建的成功。
但是，如果我嘗試運行它，我得到了
freeglut（./t_gl1）：錯誤：在功能fgOpenWindow內部錯誤，無法請求 X錯誤：BadWindow（無效的窗口參數） 的主要操作碼失敗的請求：4（X_DestroyWindow）失敗請求 資源ID：爲0x0失敗請求的 序號：在輸出流26 當前的序列號：29
是否有任何人知道這是怎麼回事？
這是在Windows和Mac上測試的代碼，沒有問題。但不能讓它在Fedora上也不Ubuntu的
#include <iostream>
#include <stdlib.h>
#ifdef __APPLE__
#include <OpenGL/OpenGL.h>
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
using namespace std;
//Called when a key is pressed
void handleKeypress(unsigned char key, //The key that was pressed
int x, int y) { //The current mouse coordinates
switch (key) {
case 27: //Escape key
exit(0); //Exit the program
}
}
//Initializes 3D rendering
void initRendering() {
//Makes 3D drawing work when something is in front of something else
glEnable(GL_DEPTH_TEST);
glEnable(GL_COLOR_MATERIAL); //NEW OF THIS
glClearColor(0.7f,0.9f,1.0f,1.0f); //background, last number to be 1.0f
}
//Called when the window is resized
void handleResize(int w, int h) {
//Tell OpenGL how to convert from coordinates to pixel values
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION); //Switch to setting the camera perspective
//Set the camera perspective
glLoadIdentity(); //Reset the camera
gluPerspective(45.0, //The camera angle
(double)w/(double)h, //The width-to-height ratio
1.0, //The near z clipping coordinate
200.0); //The far z clipping coordinate
}
float _angle=30.0f; //kinda global variable
//Draws the 3D scene
void drawScene() {
//Clear information from last draw
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW); //Switch to the drawing perspective
glLoadIdentity(); //Reset the drawing perspective
glTranslatef(0.0f,0.0f,-5.0f);
glPushMatrix();
glRotatef(_angle, 0.0f, 1.0f , 0.0f);
glColor3f(0.5f,0.0f,0.8f);
glBegin(GL_QUADS); //Begin quadrilateral coordinates
//Trapezoid
glVertex3f(-0.7f, -1.5f, 0.0f);
glVertex3f(0.7f, -1.5f, 0.0f);
glVertex3f(0.4f, -0.5f, 0.0f);
glVertex3f(-0.4f, -0.5f, 0.0f);
glEnd(); //End quadrilateral coordinates
glPopMatrix();
glPushMatrix(); //push
glRotatef(_angle, 1.0f, 0.0f, 0.0f);
glBegin(GL_TRIANGLES); //Begin triangle coordinates Begin Pentagon
glColor3f(1.0f,0.0f,0.0f);
//Pentagon
glVertex3f(0.5f, 0.5f, -0.0f);
glVertex3f(1.5f, 0.5f, -0.0f);
glVertex3f(0.5f, 1.0f, -0.0f);
glVertex3f(0.5f, 1.0f, -0.0f);
glVertex3f(1.5f, 0.5f, -0.0f);
glVertex3f(1.5f, 1.0f, -0.0f);
glVertex3f(0.5f, 1.0f, -0.0f);
glVertex3f(1.5f, 1.0f, -0.0f);
glVertex3f(1.0f, 1.5f, -0.0f);
glEnd(); //end Pentagon
glPopMatrix(); //pop
glPushMatrix();
glRotatef(_angle, -1.0f, 1.0f, 0.0f);
glBegin(GL_TRIANGLES);
//Triangle
glVertex3f(-0.5f, 0.5f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(-1.0f, 1.5f, -0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(-1.5f, 0.5f, -0.0f);
glEnd(); //End triangle coordinates
glPopMatrix();
glutSwapBuffers(); //Send the 3D scene to the screen
}
void update(int value)
{
_angle+=2.0f;
if(_angle>360)
_angle-=360;
glutPostRedisplay();
glutTimerFunc(25,update,0);
}
int main(int argc, char** argv) {
//Initialize GLUT
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(400, 400); //Set the window size
//Create the window
glutCreateWindow("window");
initRendering(); //Initialize rendering
//Set handler functions for drawing, keypresses, and window resizes
glutDisplayFunc(drawScene); //display the "drwwScene" most important part, others are settings
glutKeyboardFunc(handleKeypress);
glutReshapeFunc(handleResize);
glutTimerFunc(25,update,0); //add the timer function to make animation
glutMainLoop(); //Start the main loop. glutMainLoop doesn't return.
return 0; //This line is never reached
}
你真正應該使用'過剩*（）'函數;他們更便攜。這可能是你的問題。 – Bojangles
我做到了。我從來沒有稱這個「fgOpenWindow」，它必須被過度稱爲（freeglut） –
哦。我的錯。你可以發佈這個問題的代碼（或其中的一部分，如果它很長）？ – Bojangles