Distorted Android

Make Distort truly 3D.

Fixes for some stuff discovered while making the Distort effect fully 3D:

- make MeshSphere's normal lengths be 1 (used to be 0.5)
- make the Effect3D app display precise values of the Center and Region vars.

Relax requirements on when we can call DistortedEffects.setMax().

Before this change one had to call it before creation of shaders and before any of the DistortedEffects classes got created.
This commit removes the second requirement so now with setMax it's just like with enabling effects: it's best done in onSurfaceCreated.

Massive: make the coordinate system agree with that of OpenGL (i.e. invert the Y axis).

Make the Sink effect fully 3D.

Correct the z-axis of the center of fragment effects (it was inverted)

Progress with the Earth app.

Progress with the Earth app.

Make the Fragment effects truly 3D: change their 4D 'region' into a 3D 'center' (a point in 3D) and 3D 'region' (which is now a set of 3 radii defining an ellipsoid around the center)

Also corresponding changes to the applications.

Further fixes for the new fully 3D vertex region.

Redefine the Vertex Region from (x,y,r,unused) to (x,y,z,r). This takes into account the 'Z', which makes it possible to warp only one side of a 3D Mesh like Sphere.

Also corresponding changes in applications.

Simplify MeshSphere by deriving it not from a regular icosahedron (which has a problem of a wiggly seam line at the 'change of date' in the back of the sphere) but something that at the back has a straight vertical border between triangles: a diamond-like 16-faced solid.

Make Matrix effects Rotate and Quaternion actually correct when it comes to the Z-axis. Also corresponding adjustments in apps.

Sphere: map the texture a bit better around the seam and the poles.

Fix (hopefully the last!) probelm with texturing the Sphere: the seam in the back.

One more improvement with texturing the Sphere.

Still one problem with texturing remains.

Further fix for the Sphere. Now hopefully only the texture mapping is wrong.

Some fixes for Sphere; still not completely ok though.

Add support for MeshSphere (add ability to display it in the 'Effects3D' and 'Inflate' apps).
Still a bit buggy!

Minor.

New MeshQuad class.

- new icon for the GLOW app
- rename the BitmapTree app to ObjectTree

Fix the bug where the postprocessed GLOW halo of a Cube would be of different colors depending on the order of rendring of the cube sides. (one needed to switch off BLENDing while preprocessing )

Fix the bug where the postprocessed halo would not work for the first few frames of each quality level (before this commit the bug was visible in the 'GLOW' app).

Minor.