Need help with spatial geometry

Need help with spatial geometry - Printable Version

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Need help with spatial geometry - Lunoxx - 04.02.2019

Hello, I`m trying to make a crane system, it`s complete, but, I need help to get REAL position of crane magnet, this magnet is an attached object to another object and I don`t know how I can get real position, not attached offsets.
Is any method?

Thank you!

Re: Need help with spatial geometry - Kaliber - 04.02.2019

When i am not complete wrong, its just the x,y,z of the crane +offsetX, +offsetY, +offsetZ of the magnet

Re: Need help with spatial geometry - Lunoxx - 04.02.2019

Quote:

Originally Posted by Kaliber

When i am not complete wrong, its just the x,y,z of the crane +offsetX, +offsetY, +offsetZ of the magnet

Good idea, I tried right now, but, don`t work..

Quote:

Originally Posted by ******

Assuming the crane rotates, you need trigonometry. Look up how to find a point on a circle.

Can you give me a small example, please?

Re: Need help with spatial geometry - MEGADETHS - 04.02.2019

This is what I use create an explosion infront of the player. Not sure how good it is but it works, i think if you mess around with the code and the formula enough you can make your thing work.

PHP код:



new Float:x;

new Float:y;

new Float:z;


new Float:PlayerFacingAngle;

new const Float:DISTANCE = 3.0;

GetPlayerFacingAngle(playerid, PlayerFacingAngle);

PlayerFacingAngle = PlayerFacingAngle-180.0;

new Float:F_FLOATSIN = floatsin(-PlayerFacingAngle, degrees);

new Float:F_FLOATCOS = floatcos(-PlayerFacingAngle, degrees);


F_FLOATSIN = -F_FLOATSIN;

F_FLOATCOS = -F_FLOATCOS;


GetPlayerPos(playerid, x, y ,z);


CreateExplosion(x + DISTANCE * F_FLOATSIN, y + DISTANCE * F_FLOATCOS, z, 6, 0);

Re: Need help with spatial geometry - IstuntmanI - 04.02.2019

Maybe you need this exact same thing: https://sampforum.blast.hk/showthread.php?tid=586841.

Re: Need help with spatial geometry - Lunoxx - 04.02.2019

Quote:

Originally Posted by IstuntmanI

Maybe you need this exact same thing: https://sampforum.blast.hk/showthread.php?tid=586841.

Thank you verry much!
Now, I need to know real rotations of attached object.

Re: Need help with spatial geometry - Pottus - 05.02.2019

Quote:

Originally Posted by Lunoxx

Thank you verry much!
Now, I need to know real rotations of attached object.

Using that function isn't going to help you then! You need something else.

https://github.com/Pottus/Texture-St...dio/tsmain.pwn
Line 1610

Код:

AttachPoint(Float:offx, Float:offy, Float:offz, Float:offrx, Float:offry, Float:offrz, Float:px, Float:py, Float:pz, Float:prx, Float:pry, Float:prz, &Float:RetX, &Float:RetY, &Float:RetZ, &Float:RetRX, &Float:RetRY, &Float:RetRZ, sync_rotation = 1)

The first six parameters is your attached object's XYZ/RXRYRZ offsets the next 6 parameters is the XYZ/RXRYRZ in which the the attached object is attached to.

Returns the actual position xyz/rxryrz of the attached object.

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

I did something like: https://i.imgur.com/KQYZLSn.png, for test.. but, don`t work. Returns is only attached offsets of magnet. What`s wrong in my code?
Thank you for your response!

@Pottus

Re: Need help with spatial geometry - Pottus - 05.02.2019

Quote:

Originally Posted by Lunoxx

I did something like: https://i.imgur.com/KQYZLSn.png, for test.. but, don`t work. Returns is only attached offsets of magnet. What`s wrong in my code?
Thank you for your response!

@Pottus

Because you are using two sets of offsets that is not that this function does! You need to calculate from a static XYZ/RXRYRZ point for this to work.

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

Quote:

Originally Posted by Pottus

Because you are using two sets of offsets that is not that this function does! You need to calculate from a static XYZ/RXRYRZ point for this to work.

I tried to calculate position for Crane Cabine, from crane base which is an real object, single "real object" from this crane, but, returns is invalid position, I will try again, probably I used wrong parameters.

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

Same result.
Code: https://i.imgur.com/8kPEo7a.png
Results:

Код:

values 1: 0.000000 0.000000 -0.009998 -0.469998 0.000000 90.000000 // offsets of crane cabine
values ret: -383.852844 1154.011108 -0.009998 -0.469991 0.000000 136.199996 // returned by function

And real position of crane-base:

Код:

-1541.100219,130.634063,26.704730,0.000000,0.000000,46.199996 // position of crane base (CreateDynamicObject)

(Crane cabine is directly attached to crane-base)

Re: Need help with spatial geometry - Pottus - 05.02.2019

You messed up you are passing rotation values for position and rotation.

@Edit

Show me your attached offset positions.

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

Quote:

Originally Posted by Pottus

You messed up you are passing rotation values for position and rotation.

@Edit

Show me your attached offset positions.

Код:

AttachDynamicObjectToObject_lnx(cabina, baza, 0.000000,0.000000,-0.009999,-0.469999,0.000000,90.000000); // cabine to base
AttachDynamicObjectToObject_lnx(brat, cabina, 0.000000,-2.069998,8.448098,0.000000,0.000000,0.000000); // crane-arm (i think) to cabine
AttachDynamicObjectToObject_lnx(cablu0, brat, 0.000000,36.869819,-0.569999,0.000000,0.000000,0.000000); // cable to arm
AttachDynamicObjectToObject_lnx(magnet, cablu0, 0.000000, 0.000000,-7.440086,0.000000,0.000000,0.000000); // magnet to cable
AttachDynamicObjectToObject_lnx(cablu1, magnet, 0.000000, 0.000000,7.440086,0.000000,0.000000,0.000000); // suplimentary cable for "effect go-down"

EDIT: _lnx because I saved in this function offsets in variables.

Re: Need help with spatial geometry - Pottus - 05.02.2019

Show me the values basepos[]

@Edit

I also noticed you are attaching objects to object to object etc.. that means you need to rotate the point several times! Using the result as the next point of reference and translating the offsets to the next position rotation. It sounds complicated but it's very easy.

Код:

// List of attached objects to the base we need to calculate sequentially in
// order to figure out the position of the last attached object
static Float:CraneOffsets[6][6] = {
	{ 0.000000,0.000000,-0.009999,-0.469999,0.000000,90.000000 },// cabine to base
	{ 0.000000,-2.069998,8.448098,0.000000,0.000000,0.000000 },// crane-arm (i think) to cabine
	{ 0.000000,36.869819,-0.569999,0.000000,0.000000,0.000000 },// cable to arm
	{ 0.000000, 0.000000,-7.440086,0.000000,0.000000,0.000000 },// magnet to cable
	{ 0.000000, 0.000000,7.440086,0.000000,0.000000,0.000000 }// suplimentary cable for "effect go-down"
};


FindCraneOffset()
{
	// Get the position of the cranebase (unless it doesn't change you can set this)
	new Float:ret[6];
	GetDynamicObjectPos(ret[0], ret[1], ret[2]);
	GetDynamicObjectRot(ret[3], ret[4], ret[5]);

	// The first return reference is of course the base!
	for(new i = 0; i < 6; i++)
	{
		// Loop through each offset and rotation calculate real world position
		AttachPoint(CraneOffsets[i][0], CraneOffsets[i][1], CraneOffsets[i][2], CraneOffsets[i][3], CraneOffsets[i][4], CraneOffsets[i][5],
		ret[0], ret[1], ret[2], ret[3], ret[4], ret[5],
		ret[0], ret[1], ret[2], ret[3], ret[4], ret[5]);
	}
	return 1;
}

Didn't test it but the idea is you start with the base it's position+rotation.
Now you need to calculate the real world position of the first object based on it's offsets and rotation.
Then the next based off the last...
etc...

Get it? Maybe? Sort of? You also might not have to do all the objects only up to where you need to but that is how it is done.

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

Quote:

Originally Posted by Pottus

Show me the values basepos[]

@Edit

I also noticed you are attaching objects to object to object etc.. that means you need to rotate the point several times! Using the result as the next point of reference and translating the offsets to the next position rotation. It sounds complicated but it's very easy.

Код:

// List of attached objects to the base we need to calculate sequentially in
// order to figure out the position of the last attached object
static Float:CraneOffsets[6][6] = {
	{ 0.000000,0.000000,-0.009999,-0.469999,0.000000,90.000000 },// cabine to base
	{ 0.000000,-2.069998,8.448098,0.000000,0.000000,0.000000 },// crane-arm (i think) to cabine
	{ 0.000000,36.869819,-0.569999,0.000000,0.000000,0.000000 },// cable to arm
	{ 0.000000, 0.000000,-7.440086,0.000000,0.000000,0.000000 },// magnet to cable
	{ 0.000000, 0.000000,7.440086,0.000000,0.000000,0.000000 }// suplimentary cable for "effect go-down"
};


FindCraneOffset()
{
	// Get the position of the cranebase (unless it doesn't change you can set this)
	new Float:ret[6];
	GetDynamicObjectPos(ret[0], ret[1], ret[2]);
	GetDynamicObjectRot(ret[3], ret[4], ret[5]);

	// The first return reference is of course the base!
	for(new i = 0; i < 6; i++)
	{
		// Loop through each offset and rotation calculate real world position
		AttachPoint(CraneOffsets[i][0], CraneOffsets[i][1], CraneOffsets[i][2], CraneOffsets[i][3], CraneOffsets[i][4], CraneOffsets[i][5],
		ret[0], ret[1], ret[2], ret[3], ret[4], ret[5],
		ret[0], ret[1], ret[2], ret[3], ret[4], ret[5]);
	}
	return 1;
}

Yes, I understand what you said.. but, don`t work

Returned by your code: https://i.imgur.com/Q8YeDPB.png

Anyway, thank you, maybe you have a another ideea? :d

@ Firstly, I tried to get only cabine coordonates with AttachPoint function, to test function, but, without success..

Re: Need help with spatial geometry - Pottus - 05.02.2019

I told you what you need to do but I know there is something you are over looking. How am I supposed to know without seeing all the code ?

Re: Need help with spatial geometry - Lunoxx - 05.02.2019

Quote:

Originally Posted by Pottus

I told you what you need to do but I know there is something you are over looking. How am I supposed to know without seeing all the code ?

I will send you all of code in PM.

edit: Done.

Re: Need help with spatial geometry - Lunoxx - 06.02.2019

Bump?

Re: Need help with spatial geometry - Lunoxx - 07.02.2019

another idea?

Re: Need help with spatial geometry - Lunoxx - 09.02.2019

Bumppp