围绕中心旋转3D对象

Question

I have object moving from A to B on x-axis and there is no translation of object apart from it. Now, while moving, i want to rotate it around y-axis and the motion should change accordingly, i mean if i rotate it right when moving from -x to +x axis, it should move towards near plane that is in z-direction. I am using perspective projection. I have variable in gltranslatef which is modified in the loop after that i have glscalef to scale whole object which is made of hierarchical structure. Now i tried following code to achieve the expected result but its not working properly.

 glTranslatef(move, 0, 0);

// If I comment these 3 lines, it does not affect the output
     glTranslatef(-move, 0, 0);
glRotatef(rotate,0,1,0);
glTranslatef(move, 0, 0);

glScalef(0.2, 0.2, 1.0);

Answer 1

Your description is not accurate enough. On one hand you mention to rotate it around the y-axis. On the other hand it should move towards the near plane.

The important question is: How have you setup your projection matrix? In general, what you try to achieve in your code doesn't look too bad. However, you maybe have setup an orthogonal projection matrix.