Fixed cursor tracking, fixed hovering system and more

[axelbm]

Updated getCursorPos

• More accurate
• It does not detect any more from the back side
• Added a range restriction

Updated pointInsidePanel

• Now ignore not visible panels

Updated checkHover

• Improve the the hovering

Added vgui.MaxRange3D2D(range)

• To set the max interactive range of a panel

Example:

vgui.Start3D2D(pos, ang, scale)
	vgui.MaxRange3D2D(75)
	panel:Paint3D2D()
vgui.End3D2D()

Added vgui.IsPointingPanel(panel)

• Return true if the player aim the panel
• Do not use in vgui.Start3D2D

Uniformized the code style

• It just my personal preference and I found that more clean with the same style.

That's it!

[handsomematt]

Very nice

[MattJeanes]

This is awesome man, thanks! 😄

[handsomematt]

Anyone know if this fixes any of the open issues?

[MattJeanes]

@axelbm's comment on #9 suggests this is fixed now

[handsomematt]

Oops, seems he fixed that a while ago in a different PR. If someone could test if #3 is still an issue with these changes would be great.

[MattJeanes]

I'll give it a bash in a minute

[MattJeanes]

Doesn't look like that's fixed. Panel doesn't appear to move at all on the latest version when holding E and dragging the title bar. Tested using your 3d2dsample2.lua