Hi, i have a Problem with rotating my Camera. I try to make a 3D Space Shooter with free 3D Movement, i use a Skybox for Environment. I can rotate my Camera around the Y- Axis, but when i make a rotation around the X-Axis, the Skybox rotate foreward and backward (difficult of explanation). here my code to rotate the camera: GLvoid CCamera::Rotate(float x, float y, float z) { CVector viewVector = View-Position; if (x) // if x>0 { View.z = (float)(Position.z + sin(x)*viewVector.y + cos(x)*viewVector.z); View.y = (float)(Position.y + cos(x)*viewVector.y - sin(x)*viewVector.z); } if(y) { View.z = (float)(Position.z + sin(y)*viewVector.x + cos(y)*viewVector.z); View.x = (float)(Position.x + cos(y)*viewVector.x - sin(y)*viewVector.z); } if(z) { View.x = (float)(Position.x + sin(z)*viewVector.y + cos(z)*viewVector.x); View.y = (float)(Position.y + cos(z)*viewVector.y - sin(z)*viewVector.x); } } . . . . Update Camera . . . and here the call: Input.Update(); int dx, dy; Input.GetMouseMovement(dx, dy); // keep the cursor within the window g_mouseX += dx; if (g_mouseX+CURSOR_SIZE >= 1024) { g_mouseX = 1024-CURSOR_SIZE ; Camera->TurnRight();//OK } if (g_mouseX <= 0) { g_mouseX = 0; Camera->TurnLeft();//OK } g_mouseY += dy; if (g_mouseY >= 768) { g_mouseY = 768; Camera->Rotate(-rot,0,0);//dosen''t work } if (g_mouseY-CURSOR_SIZE <= 0) { g_mouseY = 0+CURSOR_SIZE; Camera->Rotate(rot,0,0);//dosen''t work } Here is the Demo http://theflashback.de/test.zip Can anyone tells me whats wrong ???

You can not easily define free rotation using Euler angles. Search Google and the forums for quaternions.

thanks for reply.

has anyone the (Gametutorial Number 7 free 3D Movement) ?????
i think this was the Tutorial with quaternions