Yrot calculation - Printable Version

Yrot calculation - Printable Version

+- SA-MP Forums Archive (https://sampforum.blast.hk)
+-- Forum: SA-MP Scripting and Plugins (https://sampforum.blast.hk/forumdisplay.php?fid=8)
+--- Forum: Scripting Help (https://sampforum.blast.hk/forumdisplay.php?fid=12)
+--- Thread: Yrot calculation (/showthread.php?tid=291191)

Yrot calculation - wups - 18.10.2011

I've spent the whole evening trying to figure it out, but just can't come up with a formula. Could anyone help me, when Coordinates of two objects are known, X1rot and Z1rot are also known.

NEED: Y1Rot(to face object2)

Re: Yrot calculation - Drebin - 18.10.2011

So what do you want ? Y Rotation of an object ?
GetObjectRot();

Re: Yrot calculation - wups - 18.10.2011

Quote:

Originally Posted by Drebin

So what do you want ? Y Rotation of an object ?
GetObjectRot();

I want to calculate the Yrotation for an object facing another object.

Re: Yrot calculation - Drebin - 18.10.2011

Not possible I believe
Because the Y rotation can have ANY value independent from the X and Z rotation or the coordinated of the other object (Z axis needed here anyway)

Re: Yrot calculation - wups - 18.10.2011

If you want it FACING another object, than it can't have any value, it does depend from x and z axis.

Re: Yrot calculation - Kyle - 19.10.2011

It's the Z angle which needs working out, you need to work it out with some special formular which gets tangent, sin thing shit. Didn't really understand it, after hours of indentating + coding + testing. ********* and Me got there in the end.

Re: Yrot calculation - wups - 19.10.2011

Quote:

Originally Posted by KyleSmith

It's the Z angle which needs working out, you need to work it out with some special formular which gets tangent, sin thing shit. Didn't really understand it, after hours of indentating + coding + testing. ********* and Me got there in the end.

Same story here, but Z finding was MUCH easier.

I've changed the Y axis to Z, so that it makes things clear.
Yes, I can't find any info about calculating.
This worked out for Z:

pawn Код:

Angle[0] = clampex(270.0 - atan2( Coo[3]-Coo[0],Coo[4]-Coo[1]));

i guess you understand what clampex does.
And i tried the same for Y:

pawn Код:

Angle[4]=clampex(90.0 - atan2( Coo[3]-Coo[0],Coo[5]-Coo[2]));

Well that didn't work out the same as Z.
Coo[0] and Coo[3] is X,
Coo[1] and Coo[4] is Y,
Coo[2] and Coo[5] is Z.

If you're wondering why im i substracting atan from 90, it's because its the zero rotation value.

Re: Yrot calculation - RyDeR` - 19.10.2011

Search for Euler Angles. It should give you enough information to create this "function".

Re: Yrot calculation - wups - 19.10.2011

Quote:

Originally Posted by RyDeR`

Search for Euler Angles. It should give you enough information to create this "function".

I did and to be honest, i didn't find anything usefull for this. And I don't want to read everything :S

EDIT:
Thanks for the help guys, this did the trick:

pawn Код:

Angle[4]=(92.5-(atan2( Coo[3]/Coo[0],Coo[5]-Coo[2])-120.0)/2);

Re: Yrot calculation - Kyle - 19.10.2011

Quote:

Originally Posted by wups

I did and to be honest, i didn't find anything usefull for this. And I don't want to read everything :S

EDIT:
Thanks for the help guys, this did the trick:

pawn Код:

Angle[4]=(92.5-(atan2( Coo[3]/Coo[0],Coo[5]-Coo[2])-120.0)/2);

Can you show us a picture of your final thing please? Unsure what it was suppose to look like.

#Kyle