Object properties from the point of view scripts

[AlexandreLois1]

 

I have an object that disappears when I put a certain script. Other objects do not disappear when I put in these objects this script. What is the difference between objects ?

[Estelle Pienaar]

Can you be more specific? Does the object get deleted or invisible? The best thing would be to post the script here. Everything I could say without the script or a more in-depth description would be pure speculation.

[AlexandreLois1]

The object is not deleted. It becomes invisible. Here's a script

 

Skript‚ rainbow

// :CATEGORY:Rainbow
// :NAME:L94arainbowroy
// :AUTHOR:Dana Moore
// :CREATED:2010-01-10 05:20:56.000
// :EDITED:2013-09-18 15:38:56
// :ID:444
// :NUM:600
// :REV:1.0
// :WORLD:Second Life
// :DESCRIPTION:
// L9.4a-rainbow-roy.lsl
// :CODE:

// Copyright © 2008, Scripting Your World
// All rights reserved.
//
// Scripting Your World
// By Dana Moore, Michael Thome, and Dr. Karen Zita Haigh
// http://syw.fabulo.us
// http://www.amazon.com/Scripting-Your-World-Official-Second/dp/0470339837/
//
// You are permitted to use, share, and adapt this code under the
// terms of the Creative Commons Public License described in full
// at http://creativecommons.org/licenses/by/3.0/legalcode.
// That means you must keep the credits, do nothing to damage our
// reputation, and do not suggest that we endorse you or your work.

integer NUM_PARTICLES_PER_RADIAN = 50;
float RAINBOW_ARC = PI_BY_TWO;

startRainbowROY()
{
integer numParticles = (integer)(RAINBOW_ARC *
NUM_PARTICLES_PER_RADIAN);
float age = 10.0; // you can also use these in the call
float burstRate = 0.2; // to llParticleSystem()
float total = (age * numParticles) / burstRate;
llOwnerSay("This emitter manages "+(string)total +" particles");

// Based on Listing B.1. Unchanged values removed to save trees
llParticleSystem( [
PSYS_PART_FLAGS, PSYS_PART_INTERP_COLOR_MASK | // change colour
PSYS_PART_INTERP_SCALE_MASK | // let it grow
PSYS_PART_FOLLOW_VELOCITY_MASK,
//Appearance
PSYS_PART_START_SCALE, <2.0, 0.3, 0.0>, // <1,1,0>,
PSYS_PART_END_SCALE, <2.5, 0.3, 0.0>, // <1,1,0>,
PSYS_PART_START_COLOR, <1.0, 1.0, 0.0>, // <1,1,1>,
PSYS_PART_END_COLOR, <1.0, 0.2, 0.0>, // <1,1,1>,
PSYS_PART_START_ALPHA, 0.8, // 1.00,
PSYS_PART_END_ALPHA, 0.8, // 1.00,
//Flow
PSYS_PART_MAX_AGE, age, // 10.00,
PSYS_SRC_BURST_RATE, burstRate, // 0.10,
PSYS_SRC_BURST_PART_COUNT, numParticles, // 1,

//Placement
PSYS_SRC_PATTERN, PSYS_SRC_PATTERN_ANGLE, // DROP,
PSYS_SRC_BURST_RADIUS, 15.0, // 0.00,
PSYS_SRC_ANGLE_BEGIN, 0.0, // 0.00,
PSYS_SRC_ANGLE_END, RAINBOW_ARC, // 0.00,
//Movement
PSYS_SRC_BURST_SPEED_MIN, 0.1, // 1.00,
PSYS_SRC_BURST_SPEED_MAX, 0.1 // 1.00,
]);
}

default {
state_entry() {
llSetAlpha(ALL_SIDES,0);
startRainbowROY();
}
on_rez(integer _n) {
llResetScript();
}
}
// END //

[Nova Convair]

The script will make the PRIM and NOT THE OBJECT where it is put in invisible and start the particles effect.

If it doesnt work in some cases you

- confuse prims and objects (objects can be simple prims or a group of linked prims - your script will end in the root prim if you select the whole object)
- put a script in which was set to non running state
- tried it at a place where scripts don't run.

 

[AlexandreLois1]

Outside, did not understand.
The script has been tested in the same place. It works by changing the object but operates differently! In one case, the object is invisible, otherwise it is seen.

[Nova Convair]

The script will always make the prim invisible. Always.

If you put it in an object hat is made of 10 prims for example it will make the root prim invisible. The other 9 prims will stay as they are.

[Rolig Loon]

Your script is quite simple.  It  says:

state_entry() {    llSetAlpha(ALL_SIDES,0);    startRainbowROY();}

That means "When the script starts, make the prim that contains this script transparent and start a particle display called ROY."  As Nova says, the llSetAlpha command applied to the prim that the script is in, NOT to other prims in the linkset.  If you want to make all prims in a linkset transparent, you will have to do it with llSetLinkAlpha.  So, Nova gave you a list of the reasons why this script might make some objects transparent but not others.  If you have an object with more than one prim, this script will not turn all prims transparent.  If you rez your object in a no-script zone, it won't do anything.

HOWEVER, there's one other thing that will make it unreliable, and I think it's the real reason you are having trouble.  Your syntax is wrong.  You should not write

llSetAlpha(ALL_SIDES,0);

You should write

llSetAlpha(0.0,ALL_SIDES);

The way you wrote it will make the top face (face 0) have the alpha value = -1, which will be interpreted as 0.0 = transparent.  If you put this script in an object and then don't look at face 0, you won't see it do anything.

 

[AlexandreLois1]

---

Nova Convair wrote:

The script will always make the prim invisible. Always.

If you put it in an object hat is made of 10 prims for example it will make the root prim invisible. The other 9 prims will stay as they are.

---

This is not quite true. I have created an object from one prim and he did not become invisible when placed script

---

If y

ou have an object with more than one prim, this script will not turn all prims transparent.  If you rez your object in a no-script zone, it won't do anything.

this does not explain

the phenomenon.

---

 

 

[Rolig Loon]

---

AlexandreLois1 wrote:

---

Nova Convair wrote:

The script will always make the prim invisible. Always.

If you put it in an object hat is made of 10 prims for example it will make the root prim invisible. The other 9 prims will stay as they are.

---

This is not

quite true.

I have created

an object from

one

prim

and

he

did not become

invisible

when placed

script

---

[ .... ]

 

---

It is true, but now you know why your script doesn't work. Just fix that llSetAlpha statement.  And if you have a multi-prim object, you'll have to rewrite the script to use llSetLinkAlpha so that more than one prim becomes transparent.

[AlexandreLois1]

 

 

---

It

is

true, but now you know why your script doesn't work. Just fix that

llSetAlpha

statement.  And if you have a multi-prim object, you'll have to rewrite the script to use

llSetLinkAlpha

so that more than one prim becomes transparent.

---

 

My script works, but it works strange. For me, the problem does not make the object transparent, and find out why it strange works.

[Rolig Loon]

---

AlexandreLois1 wrote:

 [ .... ]

My script

works, but

it works

strange.

For me,

the problem

does not

make the object

transparent, and

find out why

it

strange works

.

---

Did you read my post?  Did you fix that llSetAlpha statement?

[AlexandreLois1]

I understood everything perfectly. Not the problem. I do not need to change the script. I'm interested in the cause of the problem.

[Rolig Loon]

Yes, you do need to change the script. That's the whole point. That statement is written incorrectly.  If you leave it the way it is written, it will only make one face of the prim that it is in transparent instead of making the whole prim transparent.

[Qwalyphi Korpov]

---

AlexandreLois1 wrote:

 

I have

an object that

disappears when

I

put

a certain script

.

Other objects

do not disappear

when

I put

in

these objects

this script

.

What is the difference between

objects

?

---

Single Prim Objects with only face 0 vanish.  Objects with multiple prims or single prims with faces other than 0 will not.

Face 0 of the prim containing the script will vanish.  It's possible to have a single prim mesh object which has only face 0 and has multiple faces. 

Which explains it all.  Interesting puzzle you sculpted for us.

I assume you aren't trying to fix anything.  If you were you should pay attention to the people who tried to help you  fix what looks like an obvious error.

 

[AlexandreLois1]

Thank U. If I create the simplest primitive cube, as he will face? How to know the number of face?

[Estelle Pienaar]

QK, I <3 UR reply!

@ Alexandre: From the answers that have been given already, you can find the answer to your question. You will know the number of face 0 because that is the face that will be transparent.

Or you can use google and look for "lsl cube faces" and find this text:

 

Finding the value of a face

If you are unsure about which face number to use, following these steps will give you the face number to use.

• Enable the Develop menu by pressing Ctrl+Alt+Q. (On version 1.x viewers, instead enable the Advanced menu by pressing Ctrl+Alt+D.)
• Select the Face Using the "Select Texture" Tool
• Pick Develop > Rendering > Selected Texture Info from the menu, or press Ctrl+Alt+Shift ⇧+T

The face number will be shown in your local chat window or as a notification.

http://wiki.secondlife.com/wiki/Face

[AlexandreLois1]

Thank U. Everything turned out. I want to give you for helping the most expensive painting SL. It costs $ 10,000 L$. If you are interested, let's meet.

[AlexandreLois1]

 

Another strange thing. There was only half of the rainbow. The script is the same, no change. I took the only other object and put it in the script "Rainbow". Maybe someone knows what this is?

 

[Innula Zenovka]

The comment in the script you reproduced at the start of this thread, 

// Based on Listing B.1. Unchanged values removed to save trees

 suggests that you need to include some values from "Listing B.1." in your particle definition.

[Emma Krokus]

The particle rainbow is a half-circle - I think your prim is turned 90 degrees and the rest of the rainbow is underground.

 

[Rolig Loon]

---

Emma Krokus wrote:

The particle rainbow is a half-circle - I think your prim is turned 90 degrees and the rest of the rainbow is underground.

 

---

That's a good guess, Emma.  It's sort of an ugly cartoon texture but almost certainly meant to be a full half-circle.  Rotating the emitting prim will fix that.

[AlexandreLois1]

Yes, indeed it is.

[Innula Zenovka]

Emma is certainly correct about needing to rotate the emitter, but the picture got me wondering about the three-colour rainbow.   I can see red, orange and yellow bands, but what, I asked myself, can have happened to the green, blue, indigo and violet bands?

I consulted my copy of Scripting Your World and, sure enough, it requires two emitters.  In my copy of the book, it  gives the full listing for the green, blue, indigo and violet bands in chapter 9 (listing 9.4) with some notes on what to change to achieve the red, orange and yellow bands in this script.  

If I can find the time, I'll go and make a rainbow according the the book's instructions and see what it looks like.