hotspot distortion - get correct rx, ry, and rz values

hi there,

i'm surprised cant find any infos about finding the rx, ry, and rz values for a correct hotspot distortion.

what i have is a hotspot with an arrow (just png with frontal view of the arrow pointing upwards)
now i want to project the arrow to the floor (xz plane) ... basically like a sticker on the floor.

to do this you must set distorted="true" and set the rx, ry, and rz values depending on your ath and atv values.

this is still relatively easy when you want the hotspot image oriented to/away from the center/your camera:
then you can just set ry=0 and rx=atv-90

but when you want to rotate the sticker on the floor now... setting rz=angle will totally mess up the rotation!
does anybody understand what i mean and how to do this?

index

ps. and maybe to shorten that down:
if you want to place a hotspot as a sticker on a horizontal surface (ground, table)
how do you set the correct rx, ry, and rz values depending on the ath and atv values?
specially if you want to rotate the sticker on the surface to specific angles!
(example some magazine aligned on a table which is rotated by 30 degrees)

bump

O:-)

Quote from Tuur

to do this use the editor plugin.

no, i want to just set the ath/atv
and then dynamically calculate and set the correct perspective
(rx, ry, rz values)

this already fades out of the 2nd page...
humbly allowing myself to bump it
(angel)

thanks for your answer klaus, but i don't really get it...

Quote from klaus.krpano

the rotation results are also depending on the 'order' of the axis-rotations!
By default rx/ry/rz are using the order 'Y-X-Z'

i saw that in the documentation before i asked, but what does that mean?

do i have to set the rx/ry/rz in the correct order?
set ry before rx, before xz?
i don't believe that, and these two lines have the same same result...

set(ry,30); set(rx,45); set(rz,60);
set(rx,45); set(ry,30); set(rz,60);

.....

i also tried (no risk no fun) ...

<action name="calc_ry_ry_rz_from_yaw_pitch_roll">
		div(yaw,%1,-57.295779);
		div(pitch,%2,57.295779);
		div(roll,%3,-57.295779);
		Math.cos(ch,yaw);Math.sin(sh,yaw);
		Math.cos(ca,pitch);Math.sin(sa,pitch);
		Math.cos(cb,roll);Math.sin(sb,roll);
		mul(m0,ca,ch);
		mul(tmp,cb,sa);mul(tmp,ch);mul(tmp2,sb,sh);add(m3,tmp,tmp2);
		mul(m4,cb,ca);
		mul(tmp,cb,sa);mul(tmp,sh);mul(tmp2,sb,ch);sub(m5n,tmp,tmp2);mul(m5n,-1);
		mul(tmp,sb,sa);mul(tmp,ch);mul(tmp2,cb,sh);sub(m6n,tmp,tmp2);mul(m6n,-1);
		Math.atan2(yaw,m6n,m0);
		Math.atan2(roll,m5n,m4);
		Math.asin(pitch,m3);
		mul(rx,yaw,57.295779);
		mul(ry,pitch,57.295779);
		mul(rz,roll,57.295779);
	</action>


calc_ry_ry_rz_from_yaw_pitch_roll(calc(atv-90),0,0);     <!-- works fine, but same as just set(rx,calc(atv-90)); -->
calc_ry_ry_rz_from_yaw_pitch_roll(calc(atv-90),0,30);   <!-- uncorrect rotation -->
calc_ry_ry_rz_from_yaw_pitch_roll(calc(atv-90),30,0);   <!-- uncorrect rotation -->

i m in a very dark tunnel here...
:/ index

i m attaching an illustration of what i want to do:
1) hotspot image flat, pointing directly at the camera/center
2) hotspot rx=atv-90 ... works to "stick" it to the ground
3) rotating the spot, pointing a bit more to the left and not directly to/away from the cam... is a mistery.

http://imgur.com/a/g6VFk

bumping this...
its one of the unsolved misteries
maybe to be solved in 2017
.)

Quote from Tuur

did you try rotate?

thanks tuur, but sadly that doesn't work...
i need klaus