C 在Linux中使用glut调整窗口大小时显示错误
我试图编写一个简单的glut程序,但在调整窗口大小时发现显示错误(如图所示)。我在kde中使用ArchLinux。 我怎样才能修好它 调整大小之前: 调整大小后:C 在Linux中使用glut调整窗口大小时显示错误,c,opengl,glut,C,Opengl,Glut,我试图编写一个简单的glut程序,但在调整窗口大小时发现显示错误(如图所示)。我在kde中使用ArchLinux。 我怎样才能修好它 调整大小之前: 调整大小后: #包括 #包括 #包括 void myinit(void) { glClearColor(1.0,1.0,1.0,1.0); GL3F(1.0,0.0,0.0); glMatrixMode(GL_投影); glLoadIdentity(); gluOrtho2D(0.0500.0,0.0500.0); glMatrixMode(G
#包括
#包括
#包括
void myinit(void)
{
glClearColor(1.0,1.0,1.0,1.0);
GL3F(1.0,0.0,0.0);
glMatrixMode(GL_投影);
glLoadIdentity();
gluOrtho2D(0.0500.0,0.0500.0);
glMatrixMode(GLU模型视图);
}
作废显示(作废)
{
typedef GLfloat point2[2];
点2顶点[3]={0.0,0.0},{250.0500.0},{500.0,0.0};
int i,j,k;
int rand();
点2 p={75.0,50.0};
glClear(GLU颜色缓冲位);
对于(k=0;k您需要捕获调整大小事件。在glut中,您必须使用函数注册回调。在此函数中,您可以更改投影参数和视口
以下是您的程序中的一个小改动,显示了如何做到这一点:
(...)
void reshape(int width, int height)
{
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, width, 0.0, height);
glMatrixMode(GL_MODELVIEW);
}
(...)
int main(int argc, char** argv)
{
(...)
glutDisplayFunc(display);
glutReshapeFunc(reshape); /* <--- */
myinit();
(...)
}
(…)
空洞重塑(整型宽度、整型高度)
{
glViewport(0,0,宽度,高度);
glMatrixMode(GL_投影);
glLoadIdentity();
gluOrtho2D(0.0,宽度,0.0,高度);
glMatrixMode(GLU模型视图);
}
(...)
int main(int argc,字符**argv)
{
(...)
glutDisplayFunc(显示器);
GLUTRESUPEFUNC(重塑);/*切换到双缓冲(GLUT\u double
&glutSwapBuffers()
)将其修复在我的系统上:
#include <GL/glut.h>
#include <stdio.h>
#include <stdlib.h>
void display( void )
{
typedef GLfloat point2[2];
point2 vertices[3]={{0.0,0.0},{250.0,500.0},{500.0,0.0}};
int i, j, k;
int rand();
point2 p ={75.0,50.0};
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, 500.0, 0.0, 500.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_POINTS);
glColor3f(1.0, 0.0, 0.0);
for( k=0; k<5000; k++)
{
j=rand()%3;
p[0] = (p[0]+vertices[j][0])/2.0;
p[1] = (p[1]+vertices[j][1])/2.0;
glVertex2fv(p);
}
glEnd();
glutSwapBuffers();
}
int main(int argc, char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(500,500);
glutInitWindowPosition(0,0);
glutCreateWindow("Sierpinski Gasket");
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
#包括
#包括
#包括
作废显示(作废)
{
typedef GLfloat point2[2];
点2顶点[3]={0.0,0.0},{250.0500.0},{500.0,0.0};
int i,j,k;
int rand();
点2 p={75.0,50.0};
glClearColor(1.0,1.0,1.0,1.0);
glClear(GLU颜色缓冲位);
glMatrixMode(GL_投影);
glLoadIdentity();
gluOrtho2D(0.0500.0,0.0500.0);
glMatrixMode(GLU模型视图);
glLoadIdentity();
glBegin(总分);
GL3F(1.0,0.0,0.0);
对于(k=0;ktry调用glViewport()(我能够在我的Linux机器运行伙伴上重现时髦的不调整大小行为,无论是否启用桌面合成。我明白了。非常感谢!抱歉,它不起作用。无法正确显示的区域仍然无法显示。但是,由于您展开了屏幕坐标,因此在调整窗口大小时,点不会改变位置。仍然谢谢。
#include <GL/glut.h>
#include <stdio.h>
#include <stdlib.h>
void display( void )
{
typedef GLfloat point2[2];
point2 vertices[3]={{0.0,0.0},{250.0,500.0},{500.0,0.0}};
int i, j, k;
int rand();
point2 p ={75.0,50.0};
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, 500.0, 0.0, 500.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_POINTS);
glColor3f(1.0, 0.0, 0.0);
for( k=0; k<5000; k++)
{
j=rand()%3;
p[0] = (p[0]+vertices[j][0])/2.0;
p[1] = (p[1]+vertices[j][1])/2.0;
glVertex2fv(p);
}
glEnd();
glutSwapBuffers();
}
int main(int argc, char** argv)
{
glutInit(&argc,argv);
glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(500,500);
glutInitWindowPosition(0,0);
glutCreateWindow("Sierpinski Gasket");
glutDisplayFunc(display);
glutMainLoop();
return 0;
}