opengl不带输出文字api，可以用glut来实现
void myDisplay(void)
{
int a = clock();
glClear(GL_COLOR_BUFFER_BIT);
char *str = "FPS:60";
int n = strlen(str);
glRasterPos3f(-1, 0.95, 0.0);
for (int i = 0; i < n; i++)
glutBitmapCharacter(GLUT_BITMAP_9_BY_15, *(str + i));
glFlush();
cout << "FPS:" << 1000.0 / (clock() - a) << endl;
}- void myDisplay(void)
- {
- int a = clock();
- glClear(GL_COLOR_BUFFER_BIT);
- char *str = "FPS:60";
- int n = strlen(str);
- glRasterPos3f(-1, 0.95, 0.0);
- for (int i = 0; i < n; i++)
- glutBitmapCharacter(GLUT_BITMAP_9_BY_15, *(str + i));
- glFlush();
- cout << "FPS:" << 1000.0 / (clock() - a) << endl;
- }
void myDisplay(void)
{
int a = clock();
glClear(GL_COLOR_BUFFER_BIT);
char *str = "FPS:60";
int n = strlen(str);
glRasterPos3f(-1, 0.95, 0.0);
for (int i = 0; i < n; i++)
glutBitmapCharacter(GLUT_BITMAP_9_BY_15, *(str + i));
glFlush();
cout << "FPS:" << 1000.0 / (clock() - a) << endl;
}