glLoadIdentity();
glRotatef(-camera.pitch, 1, 0, 0);
glRotatef(-camera.heading, 0, 1, 0);
glTranslatef(-camera.position.x, 
             -camera.position.y,
             -camera.position.z);

glPushMatrix();
glTranslatef(model1.position.x,
             model1.position.y,
             model1.position.z);
glRotatef(model1.heading, 0, 1, 0);
drawModel(&model1);
glPopMatrix();

glPushMatrix();
glTranslatef(model2.position.x,
             model2.position.y,
             model2.position.z);
glRotatef(model2.heading, 0, 1, 0);
drawModel(&model2);
glPopMatrix();