Distorted Android

Up version to 1.6.5

We have new, Polygon method of rendering Object faces, and a new object - the Skewb.
Time for 1.4.2 !

We have the new Object - the Dino - so up the version to 1.4.0.

Move to AndroidX, target API level 29.

We need to add app version to build.gradle - otherwise the resulting dex file cannot be opened by Fire Stick!

Overhaul of the Effects3D generic test app.

Still not perfect (the 'postprocess' tab does not work; things crash when we rotate)

Reengineer DistortedScreen

Order Independent Transparency: some progress

Minor.

Minor

Remove buildToolsVersion

1. Move to Gradle 25.0.0
2. Bugfix in DistortedNode

Fix the 'Save' app on Android API >=23 (we need to explicitly ask for write permission)

Shades of the WAVE effect (almost!) working.

Correct an important bug in the vertex shader.

b = 1/a if a!=0, 1 otherwise was incorrectly computed as b = 1.0 / (a+1.0-sign(a)). This, when 0<a<2^-24, suffers from 'round-off error': then a+1.0 = 1.0 (sic!) thus b = 1/0 !.

Correct way: b = 1.0 / ( a - (sign(a)-1.0) )

New app: PlainMonaLisa (Mona Lisa rendered on plain SurfaceView)

Initial commit

Initial commit