Add ability to set scaleX and scaleY separately for viewport in flower

[Vavius]

Maybe, viewport handling should be redone in flower.
Now it forces to use coordinate system where y = 0 at top.

While that setting is OK for GUI-intensive apps, it's not very suitable for physics games, platformers, and such.

Maybe we could find a solution? Problem seems pretty hard, since all widgets and probably other extensions are coordinate system dependent. Also, all texture coordinates should be flipped as well.

[makotok]

Viewport can be set up individually.
A GUI layer sets up standard viewport.
A physical layer sets up viewport with an arbitrary mounting person.

All standard MOAI functions can be used.
Flower should be made as it is.

[makotok]

Is a texture possibly reversed?

Only coordinates can be made into a standard at the center.
In that case, a texture should not be reversed.

[Vavius]

Setting viewports for different layers can be acceptable workaround.

But texture is flipped vertically. It is a UV coordinates issue. Default uv
rect is (0, 1, 1, 0), flower uv rect is (0, 0, 1, 1)

[makotok]

When the center coordinates.

local viewport = MOAIViewport.new()
viewport:setSize(flower.screenWidth, flower.screenHeight)
viewport:setScale(flower.viewWidth, -flower.viewHeight)

[Vavius]

So, I cannot invert Y axis direction, i.e. 0 at bottom 480 at top?

local viewport = MOAIViewport.new()
viewport:setSize(flower.screenWidth, flower.screenHeight)
viewport:setScale(320, 480)

If I understand it correctly, UV coordinates should be flipped too.

[makotok]

Understood.
It may be so indeed.

For 2D games, towards the standard would be easy to use top left Viewport.
Starling, even CoronaSDK, Viewport is a standard top left.

However, we will should be able to select the Viewport different.
Should I use the Viewport another might say the physical.

This problem can be solved DisplayObject If you can reverse?
For example, I implement the flip function.

[makotok]

The default viewport options have been added.