Issue with 3D Spinning Cube sample in MapTriangle doc

[mdijkens]

I am playing with the samples of _MAPTRIANGLE to get a better understanding of the 3D rotation workings...

As a basis I am using 'Example 2: A 3D Spinning Cube demo using a software image and _MAPTRIANGLE' on the wiki page 

If I put

Code: (Select All)

PIT(OB&) = 90
  YAW(OB&) = 0
ROL(OB&) = 10

With Pitch of 90 degrees, Roll becomes Yaw so the above values would result in the cube rotated to P=90,Y=10,R=0

It must have to do with the formulas here:

Code: (Select All)

RX& = (TZ& * CP - TY& * SP) * SY - ((TZ& * SP + TY& * CP) * SR + TX& * CR) * CY
RY& = (TZ& * SP + TY& * CP) * CR - TX& * SR
RZ& = (TZ& * CP - TY& * SP) * CY + ((TZ& * SP + TY& * CP) * SR + TX& * CR) * SY

But I can't get my head around it.

Can someone give this a try and see what's the error is in these formulas?