void display(void)
{
// set new model view and projection matrix
glClearColor(0.3, 0.3, 0.3, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
GLfloat m[16];
trackball.getMatrix().getValue(m);
glPushMatrix();
glMultMatrixf(m);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_TEXTURE_2D);
// CMSC: rendering your geometry here...
myVectorField->Render();
drawAxis(0., 0., 0., 1.);
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
glPopMatrix();
glFlush();
glutSwapBuffers();
}
