Enabled texture rotation

* Pending: rotation not in sync with axes
* Pending: spin and magnetic axes not in sync (need decoupling)

src/pulsaranimationwidget.cpp

@@ -133,9 +133,9 @@ void PulsarAnimationWidget::initializeGL()
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
 
-    // enable 2D sphere mapping (s/t coordinates)
-    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
-    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
+    // enable 2D mapping (s/t coordinates, sphere map won't rotate texture!)
+    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
+    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
 }
 
 void PulsarAnimationWidget::resizeGL(int w, int h)
@@ -203,7 +203,6 @@ void PulsarAnimationWidget::paintGL()
 				glPopMatrix();
 			}
 
-	        // FIXME: how to rotate texture?
 			glRotatef(m_pulsarRotationAngle, 0.0f, 1.0f, 0.0f);
 			glRotatef(m_pulsarSpinAxisInclination, 1.0f, 0.0f, 0.0f);