Hi, I am trying to create a prototype program that allows for a spotlight to be moved (and rotated) around a scene depending on user mouse input. Unfortunately I am a complete noob at OpenGL and don't seem to be able to make it move as intended. It is behaving as a directional light and not positional. No matter what I do I cannot seem to make the light rotate and move around the scene. Rather, it has always the same origin and *doesn't* rotate. All I /can/ do is move what seems to be the "spotlight direction" - from the origin to some end point, which gives the impression that the light is spreading. You can see a couple of screenshots at this link: http://picasaweb.google.co.uk/0v3rloader/UntitledAlbum The leftmost picture shows the light at its initial position - no translations/rotations performed. The rightmost one shows the light *after* having been translated along the (negative) z-axis. There is also a green vector showing what *should be* the light's current direction and position. As you can see it is not working as it should. Below you can find some code snippets that should help you understand what I am doing wrong :) - Initializations are done like so:

void CScene::Init()
{
	GLfloat afAmbientLight[] = {0.4f, 0.4f, 0.4f, 1.0f};
	GLfloat no_mat[] = {0.0f, 0.0f, 0.0f, 1.0f};

	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
	glClearDepth(1.0f);
	glDepthFunc(GL_LEQUAL);
	glEnable(GL_DEPTH_TEST);
	glShadeModel(GL_SMOOTH);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
	glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
	glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
	glHint(GL_FOG_HINT, GL_NICEST);
	glEnable(GL_LIGHTING);

	glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, no_mat);
}

- The method that sets up the light and draws the vector:

void CLight::Draw()
{
	glPushMatrix();

	GLfloat glfPosition[4];
	GLfloat samplelight[]={1.,1.,1.,1.};

	// the position of the light
	glfPosition[0] = 0;
	glfPosition[1] = 0;
	glfPosition[2] = 0;
	glfPosition[3] = 1.0f;

	// transform light position/rotation accordingly
	glTranslatef(m_fX, m_fY, m_fZ);
	glRotatef(m_fAX, 1.0f, 0.0f, 0.0f);
	glRotatef(m_fAY, 0.0f, 1.0f, 0.0f);
	glRotatef(m_fAZ, 0.0f, 0.0f, 1.0f);

	glEnable(GL_LIGHT0);
	glLightfv(GL_LIGHT0, GL_DIFFUSE, samplelight);
	glLightfv(GL_LIGHT0, GL_SPECULAR, samplelight);
	glLightfv(GL_LIGHT0, GL_POSITION, glfPosition);

	// draw the vector
	glMaterialfv(GL_FRONT, GL_EMISSION, mat_diffuse);

	glDisable(GL_LIGHTING);
	glBegin(GL_LINES);
	{
		glColor3f(0,1,0);
		glVertex3f(0, 10, 0);
		glVertex3f(0, 0, 0);

		glVertex3f(0, 0, 0);
		glVertex3f(-0.4f, 0.6f, 0);

		glVertex3f(0, 0, 0);
		glVertex3f(0.4f, 0.6f, 0);
	}
	glEnd();
	glEnable(GL_LIGHTING);

	glPopMatrix();
}

- Method that handles drawing of the scene:

void CMainScene::Draw(DWORD dwMsElapsed)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();

	// this is here temporarily until I get this sorted out
	static GLfloat fX = 0, fY = -15, fZ = -55;
	static GLfloat fRX = 20, fRY = 0, fRZ = 0;

	// transform camera or light
	if(::GetGLMainWnd()->IsKeyDown(VK_CONTROL))
	{
		fX -= m_pMiceInfo[0].pos.x;
		fY += m_pMiceInfo[0].pos.y;
		fZ -= m_pMiceInfo[1].pos.y;
		fRX += m_pMiceInfo[2].pos.y * m_fRotScalingFactor;
		fRY += m_pMiceInfo[1].pos.x * m_fRotScalingFactor;
		fRZ += m_pMiceInfo[2].pos.x * m_fRotScalingFactor;
	}
	else
	{
		m_Light.AddXBy(m_pMiceInfo[0].pos.x * m_fXYScalingFactor);
		m_Light.AddYBy((-m_pMiceInfo[0].pos.y) * m_fXYScalingFactor);
		m_Light.AddZBy(m_pMiceInfo[1].pos.y * m_fRotScalingFactor);
		m_Light.AddYAngleBy((-m_pMiceInfo[1].pos.x) * m_fRotScalingFactor);
		m_Light.AddZAngleBy((-m_pMiceInfo[2].pos.x) * m_fRotScalingFactor);
		m_Light.AddXAngleBy(m_pMiceInfo[2].pos.y * m_fRotScalingFactor);
	}

	// similar to gluLookAt, only not
	glTranslatef(fX, fY, fZ);
	glRotatef(fRX, 1,0,0);
	glRotatef(fRY, 0,1,0);
	glRotatef(fRZ, 0,0,1);

	// let's start drawing
	m_Light.Draw();
	glCallList(O3D_FLOOR);
	glCallList(O3D_WALLS);

	// flush, swap and all done!
	glFlush();
	::SwapBuffers(m_poWndParent->GetDC());
}

I really am in need of some expert help. I welcome any comments/suggestions you may have. [EDIT]Added link to pics.[/EDIT

This page shows how to set up lights. Specifiying spotlight properties. Hope it helps