Question

c++ opengl怎么画圆

c++ opengl怎么画圆?

Answer 1

先定义#define GL——PI 3.1415

GLfloat x,y,z,angle;
glPushMatrix();
glTranslatef(300,200,0);
glColor3f(0.0f,0.5f,0.5f);
glBegin(GL_POINTS);
for(angle=0.0f;angle<2*GL_PI;angle+=0.01f)
{
x=150.0f*sin(angle);
y=150.0f*cos(angle);
glVertex2f(x,y);
}

glEnd();
glPopMatrix();