我没有在程序中使用glutMainLoop(),但在一个简单的while循环中使用了glutMainLoopEvent()。这很好,但从未调用过重塑回调。我在main()中注册了我的重塑事件。下面是我的源代码:
#include <iostream>
#include "GL/freeglut.h"
float angle = 0.0f;
void ResizeEvent(int w, int h)
{
std::cout << "Resizing... << w << " " << h << std::Endl;
if(h == 0)
h = 1;
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, (GLdouble)w / h, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void InitializeGL()
{
glClearColor(0.0, 0.0, 0.0, 1.0f);
glViewport(0, 0, 640, 480);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, 640.0 / 480.0, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void Update()
{
angle += 0.05f;
}
void Display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -3.0f);
glRotatef(angle, 0.5f, 1.0f, 0.75f);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glEnd();
glutSwapBuffers();
}
int main(int argc, char* argv[])
{
glutInit(&argc, argv);
glutInitWindowSize(640, 480);
glutCreateWindow("Learning freeglut");
InitializeGL();
glutReshapeFunc(ResizeEvent);
while(true)
{
Update();
Display();
glutMainLoopEvent();
}
return 0;
}提前感谢!
编辑:有人吗?
发布于 2014-11-09 02:54:37
glutReshapeFunc需要将glutDisplayFunc设置为某个值。这甚至可以是一个空函数,只要你在调整大小时不需要窗口更新。
可能的解决方案
...
glutReshapeFunc(ResizeEvent);
glutDisplayFunc(Display);
while(true)
{
Update();
Display();
glutMainLoopEvent();
}
...https://stackoverflow.com/questions/26224884
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