Second Life Forums Archive - help with rotation

Rebekka Revnik

Registered User

Join date: 26 Mar 2008

Posts: 18

09-02-2009 01:38

Hi, I have an object which tilts to the side by touching. However it wont work correctly if I rotate the object to another direction. Rotations are far beyond my knowledge, so any idea is gladly appreciated.

CODE

vector Pos1 = <28.68877, 29.15979, 21.37600>;
rotation Rot1 = <0.00000, 0.00000, 0.00000, 1.00000>;
vector Pos2 = <28.68877, 29.15979, 21.37600>;
rotation Rot2 = <-0.08716, 0.00000, 0.00000, 0.99619>;
vector DiffPos;
rotation DiffRot;

integer State = FALSE;

SetRot1()
{
	rotation rot;
	vector pos;
	pos = llGetPos() + DiffPos * llGetRot();
	rot = llGetRot() * DiffRot;
	llSetPos(pos);
	llSetRot(rot);
}

SetRot2()
{
	rotation rot;
	vector pos;
	pos = llGetPos() - DiffPos * llGetRot();
	rot = llGetRot() / DiffRot;
	llSetPos(pos);
	llSetRot(rot);
}

default
{
	state_entry()
	{
		DiffPos = Pos2 - Pos1;
		DiffRot = Rot2 / Rot1;
	}
	touch_start(integer total_number)
	{
		if(!State) SetRot1();
		else SetRot2();
		State = !State;
	}
}

Dora Gustafson

Registered User

Join date: 13 Mar 2007

Posts: 779

09-02-2009 02:12

From: Rebekka Revnik

Hi, I have an object which tilts to the side by touching. However it wont work correctly if I rotate the object to another direction. Rotations are far beyond my knowledge, so any idea is gladly appreciated.

CODE

vector Pos1 = <28.68877, 29.15979, 21.37600>;
rotation Rot1 = <0.00000, 0.00000, 0.00000, 1.00000>;
vector Pos2 = <28.68877, 29.15979, 21.37600>;
rotation Rot2 = <-0.08716, 0.00000, 0.00000, 0.99619>;
vector DiffPos;
rotation DiffRot;

integer State = FALSE;

SetRot1()
{
	rotation rot;
	vector pos;
	pos = llGetPos() + DiffPos * llGetRot();
	rot = llGetRot() * DiffRot;
	llSetPos(pos);
	llSetRot(rot);
}

SetRot2()
{
	rotation rot;
	vector pos;
	pos = llGetPos() - DiffPos * llGetRot();
	rot = llGetRot() / DiffRot;
	llSetPos(pos);
	llSetRot(rot);
}

default
{
	state_entry()
	{
		DiffPos = Pos2 - Pos1;
		DiffRot = Rot2 / Rot1;
	}
	touch_start(integer total_number)
	{
		if(!State) SetRot1();
		else SetRot2();
		State = !State;
	}
}

Nice typo

I like that, it is easy to read.
I will suggest you include the new rotation in the new position, something like this:

CODE


SetRot1()
{
	rotation rot;
	vector pos;
	rot = llGetRot() * DiffRot;
	pos = llGetPos() + DiffPos * rot;
	llSetPos(pos);
	llSetRot(rot);
}

Furthermore I would concentrate on the order of rotation arguments. You know: rotationA*rotationB != rotationB*rotationA
Happy scripting

_____________________

From Studio Dora

Cyrielle Thespian

Registered User

Join date: 21 Nov 2008

Posts: 0

09-02-2009 08:49

Thanks Dora, you were right with the order. Changed my code as follows:

CODE

SetRot1()
{
	rotation rot;
	vector pos;
	pos = llGetPos() + DiffPos * llGetRot();
	rot = DiffRot * llGetRot();
	llSetPos(pos);
	llSetRot(rot);
}

SetRot2()
{
	rotation rot;
	vector pos;
	pos = llGetPos() - DiffPos * llGetRot();
	rot = DiffRot / llGetRot();
	llSetPos(pos);
	llSetRot(rot);
}

SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please?

Rebekka Revnik

Registered User

Join date: 26 Mar 2008

Posts: 18

09-02-2009 08:54

Thanks Dora, you were right with the order. Changed my code as follows:

CODE

SetRot1()
{
	rotation rot;
	vector pos;
	pos = llGetPos() + DiffPos * llGetRot();
	rot = DiffRot * llGetRot();
	llSetPos(pos);
	llSetRot(rot);
}

SetRot2()
{
	rotation rot;
	vector pos;
	pos = llGetPos() - DiffPos * llGetRot();
	rot = DiffRot / llGetRot();
	llSetPos(pos);
	llSetRot(rot);
}

SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please?

Dora Gustafson

Registered User

Join date: 13 Mar 2007

Posts: 779

09-02-2009 12:44

From: Rebekka Revnik

SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please?

In that case I will suggest you try:

CODE


SetRot2()
{
    rotation rot;
    vector pos;
    pos = llGetPos() - DiffPos * llGetRot();
    rot = ZERO_ROTATION / DiffRot * llGetRot();
    llSetPos(pos);
    llSetRot(rot);
}

_____________________

From Studio Dora

Abraxes Binder

Registered User

Join date: 23 May 2008

Posts: 205

09-03-2009 06:26

DiffPos = Pos2 - Pos1;
that would be 0
You have
vector Pos1 = <28.68877, 29.15979, 21.37600>;
vector Pos2 = <28.68877, 29.15979, 21.37600>;

and subtract them and allocate val to a var 'DiffPos' -why?

br

_____________________

BR ab

Rebekka Revnik

Registered User

Join date: 26 Mar 2008

Posts: 18

09-03-2009 10:02

Thank you very much again Dora, now it's works fine

@Abraxes: It's for future use, I was concentrating on rotations first.

help with rotation
Rebekka Revnik Registered User Join date: 26 Mar 2008 Posts: 18	09-02-2009 01:38 Hi, I have an object which tilts to the side by touching. However it wont work correctly if I rotate the object to another direction. Rotations are far beyond my knowledge, so any idea is gladly appreciated. CODE vector Pos1 = <28.68877, 29.15979, 21.37600>; rotation Rot1 = <0.00000, 0.00000, 0.00000, 1.00000>; vector Pos2 = <28.68877, 29.15979, 21.37600>; rotation Rot2 = <-0.08716, 0.00000, 0.00000, 0.99619>; vector DiffPos; rotation DiffRot; integer State = FALSE; SetRot1() { rotation rot; vector pos; pos = llGetPos() + DiffPos * llGetRot(); rot = llGetRot() * DiffRot; llSetPos(pos); llSetRot(rot); } SetRot2() { rotation rot; vector pos; pos = llGetPos() - DiffPos * llGetRot(); rot = llGetRot() / DiffRot; llSetPos(pos); llSetRot(rot); } default { state_entry() { DiffPos = Pos2 - Pos1; DiffRot = Rot2 / Rot1; } touch_start(integer total_number) { if(!State) SetRot1(); else SetRot2(); State = !State; } }
Dora Gustafson Registered User Join date: 13 Mar 2007 Posts: 779	09-02-2009 02:12 From: Rebekka Revnik Hi, I have an object which tilts to the side by touching. However it wont work correctly if I rotate the object to another direction. Rotations are far beyond my knowledge, so any idea is gladly appreciated. CODE vector Pos1 = <28.68877, 29.15979, 21.37600>; rotation Rot1 = <0.00000, 0.00000, 0.00000, 1.00000>; vector Pos2 = <28.68877, 29.15979, 21.37600>; rotation Rot2 = <-0.08716, 0.00000, 0.00000, 0.99619>; vector DiffPos; rotation DiffRot; integer State = FALSE; SetRot1() { rotation rot; vector pos; pos = llGetPos() + DiffPos * llGetRot(); rot = llGetRot() * DiffRot; llSetPos(pos); llSetRot(rot); } SetRot2() { rotation rot; vector pos; pos = llGetPos() - DiffPos * llGetRot(); rot = llGetRot() / DiffRot; llSetPos(pos); llSetRot(rot); } default { state_entry() { DiffPos = Pos2 - Pos1; DiffRot = Rot2 / Rot1; } touch_start(integer total_number) { if(!State) SetRot1(); else SetRot2(); State = !State; } } Nice typo I like that, it is easy to read. I will suggest you include the new rotation in the new position, something like this: CODE SetRot1() { rotation rot; vector pos; rot = llGetRot() * DiffRot; pos = llGetPos() + DiffPos * rot; llSetPos(pos); llSetRot(rot); } Furthermore I would concentrate on the order of rotation arguments. You know: rotationArotationB != rotationBrotationA Happy scripting _____________________ From Studio Dora
Cyrielle Thespian Registered User Join date: 21 Nov 2008 Posts: 0	09-02-2009 08:49 Thanks Dora, you were right with the order. Changed my code as follows: CODE SetRot1() { rotation rot; vector pos; pos = llGetPos() + DiffPos * llGetRot(); rot = DiffRot * llGetRot(); llSetPos(pos); llSetRot(rot); } SetRot2() { rotation rot; vector pos; pos = llGetPos() - DiffPos * llGetRot(); rot = DiffRot / llGetRot(); llSetPos(pos); llSetRot(rot); } SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please?
Rebekka Revnik Registered User Join date: 26 Mar 2008 Posts: 18	09-02-2009 08:54 Thanks Dora, you were right with the order. Changed my code as follows: CODE SetRot1() { rotation rot; vector pos; pos = llGetPos() + DiffPos * llGetRot(); rot = DiffRot * llGetRot(); llSetPos(pos); llSetRot(rot); } SetRot2() { rotation rot; vector pos; pos = llGetPos() - DiffPos * llGetRot(); rot = DiffRot / llGetRot(); llSetPos(pos); llSetRot(rot); } SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please?
Dora Gustafson Registered User Join date: 13 Mar 2007 Posts: 779	09-02-2009 12:44 From: Rebekka Revnik SetRot1 is working properly now, but there is still something wrong with SetRot2. Maybe another hint please? In that case I will suggest you try: CODE SetRot2() { rotation rot; vector pos; pos = llGetPos() - DiffPos * llGetRot(); rot = ZERO_ROTATION / DiffRot * llGetRot(); llSetPos(pos); llSetRot(rot); } _____________________ From Studio Dora
Abraxes Binder Registered User Join date: 23 May 2008 Posts: 205	09-03-2009 06:26 DiffPos = Pos2 - Pos1; that would be 0 You have vector Pos1 = <28.68877, 29.15979, 21.37600>; vector Pos2 = <28.68877, 29.15979, 21.37600>; and subtract them and allocate val to a var 'DiffPos' -why? br _____________________ BR ab
Rebekka Revnik Registered User Join date: 26 Mar 2008 Posts: 18	09-03-2009 10:02 Thank you very much again Dora, now it's works fine @Abraxes: It's for future use, I was concentrating on rotations first.

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help with rotation