I need some help. I am working a script that will listen to a channel, take the message and use it as a texture command (this part i have), than change only the child prims that have the right name (this part i can not figure out). I know it is possible to do, but for the life of me i can not figure out how to filter by name than send the texture to the right child prim. Any help or ideas would be wonderful, Thank you.
ps, if a list is needed, i will need help with that too, i cant seem to wrap my brain around them.
You can use llGetNumberOfPrims to find out how many prims there are in the object (if you don't know that already) and then use llGetLinkName on each of them in for loop to check the child prim name.
set_textures(string name, string texture, integer side) {
integer i;
if(llGetLinkNumber() != 0)
for(i = 0; i < llGetNumberOfPrims(); ++i)
if(llGetLinkName(i+1) == name)
llSetLinkTexture(i+1, texture, side);
}
Related
I'm trying to write a kernel module to detect a fork bomb, and to do this, I want to add a field int descendantCount to task_struct. This is my code so far:
struct task_struct *pTask;
for_each_process(pTask)
{
struct task_struct *p;
*p = *pTask;
//trace back to every ancestor
for(p = current; p != &init_task; p->parent)
{
//increment the descendant count of p's parent
p->descendantCount = p->descendantCount +1 //want to do something like this
}
}
Basically, I'm trying to loop through every process, and for each process, go through all of it's ancestors and increment the ancestor's descendantCount, which is the field that I want to add to task_struct.
I found this, and this, but I'm just still really confused on how I would go about doing this, as I'm new to kernel programming... Should I be going to include/linux/sched.h and adding a field there? Something like this:
struct task_struct {
......
pid_t pid;
....
int descendantCount;
}
Any help would be greatly appreciated, thank you!!
It is unclear what the actual idea is - is this supposed to bo executed on fork? Regardless, the idea is wrong and the implementation is buggy regardless of how pseudocody pasted sample is.
First of all descendantCount is a name using camelCase, which makes it inconsistent with the rest of the code. A less bad name would be descendant_count.
Counter modification must use atomic operations to not lose writes or the entire thing needs to be using an exclusive lock.
The traversal uses ->parent which is subject to change with ptrace where it starts pointing to the tracer. The parent you want can be found in ->real_parent.
Except there is no RCU protection provided, thus processes can be freed as you traverse them making the loop a use-after-free.
With RCU or tasklist_lock the traversal will be safe, but nonsensical. Procesess can be reparented to init when their original parent dies, rendering your hierarchical approach broken.
Processes would have to be grouped in some manner, but parent<->child relation is unsuitable for this purpose. Somewhat working examples of such grouping are cgroups and simple stuff like uids/gids.
All in all, this does not work.
Given that it looks like you are new not only to kernel itself but also C, I can only recommend focusing on userspace for the time being.
stupid question but I m having an issue with that.
Can you make more than 1 attribute paintable on the same shape ?
I am adding 3 double array attributes for testing purpose and I make them paintable trough a loop while adding them.
When I do that, I can t paint them through my test and to verify that i tried painting it via right click on the mesh -> paint -> mesh and I only see the usual paintable attributes + the first one I defined...
Is there anything specific to do to declare more than 1 attributes paintable ?
Thanks !
I found out why it wasn't working. The documentation for makePaintable is wrong ...
cmds.makePaintable('node','attribute') like shown in the documentation doesn't work. Instead, you have to do cmds.makePaintable('nodeType','attribute') and your mesh has to be selected (I suppose as you don't specify it in the command)
It is now working.
I'm trying to save color of vertices using vcglib but failed. Even if I read a file in and save it out without doing anything, the color of the original file is lost.
Here is the code I wrote:
vcg::tri::io::ImporterPLY<MyMesh>::Open(*srcMesh,"bunny.ply");
vcg::tri::io::ExporterPLY<MyMesh>::Save(*srcMesh,"out.ply");
After doing this, out.ply has no color while the source ply bunny.ply does.
Could anybody give me some sample code to make this thing done?
Thank you!
I had the exact same problem a couple of weeks ago.
After spending some time with the debugger and browsing through lots of source code, I discovered that the the open and save methods need to share an int mask. This allows the Open method to convey which attributes have been read from the original mesh (Also, make sure you've added the Colour4b attribute to your mesh definition.
int mask=0;
vcg::tri::io::ImporterPLY<MyMesh>::Open(*srcMesh,"bunny.ply",mask);
vcg::tri::io::ExporterPLY<MyMesh>::Save(*srcMesh,"out.ply",mask);
I hope that helps.
I have a flash game that I'm building where I have an array keeping track of a bunch of power ups on the screen. When the player goes an grabs one it needs to disappear from the screen (which is easy) but it also needs to be removed from the array so that collision detection loops don't become really cumbersome. I tried using splice, but I keep get null reference errors, here's the relevant code.
public function collect():void {
try {
Main.powerUps.splice(index, 1);
stage.removeChild(this);
}catch (e:Error) {
trace("Error in splice");
}
}
}
Then when I create my PowerUp object I pass it a parameter that gets assigned to index which is the length of the array of Power Ups at the time. Can anyone see what's wrong with this code or (preferably) provide a more elegant solution? Thanks in advance for any help.
Elegant solution: use indexOf() and splice() together!
var index:int = Main.powerUps.indexOf( powerup );
Main.powerUps.splice(index, 1);
Where powerup is a reference to the object stored within the array Main.powerUps.
I also created a little class a while back that may be useful to you:
https://github.com/MartyWallace/Lotus/blob/master/Lotus/lotus/utils/Set.as
It has a .remove() method so you can just do:
powerUps.remove(powerup);
K. I'm getting stuck here.
I'm trying to make an array with different color values.
My problem is that when I do...
teamColor[i] = currentColor... all color values in my array turn into the currentColor.
(I would upload more code, but that would be a massive mess, considering that I have code everywhere with references from movie clips that are as far as 3 layers deep. HOWEVER, this would be irrelevant anyways (probably), because I tested this with color values on my main timeline, without any references to or from anything deeply nested)
I'm GUESSING that this is just some horrible bug, but if it's not (and I hope it isn't), please guide me in what to do to fix this problem.
I would like to add that I tried adding strings in there and that the strings remained their original, intended, value, while the color exhibited the same phenomenon.
[Partially resolved]:
I changed my code by creating separate variables for each color instead of putting the variables into an array (not what I really wanted to do, but it works). My code looks like this:
`
if (teamColor != 0)
{
this["team"+teamColor+"Color"] = new ColorTransform(0,0,0,1,currentColor.redOffset,currentColor.greenOffset,currentColor.blueOffset,0)
teamColor = 0
namebox.addboxes()//function in a movieclip
}`
teamColor is now an int that is changed based on which box a user clicks from a movie clip that has a dynamically generated name, based off of what the variable value in a loop was when it was created. (E.G: 'tempboxname[ttns].name = i;')
teamColor is then equal to that name when the user clicks it.
I have another movieclip with colors in it and the above function is called to check if any teamColor change has occurred, and if it has, act accordingly. (The idea of having teamColor equal to 0 is so that if the user clicks twice, nothing changes. I other conditionals for other colors, all within the same function).
That is how I fixed me code.
It's not what I wanted, because it's not an array (meaning a seemingly infinite number of teamColors, and thus, teams) but it'll do for me. If anyone has any suggestions, feel free to suggest.
I'm no ActionScript wiz, but what it looks like to me is that currentColor is an object that is being passed into the array by reference. This means that all array entries that you assigned currentColor will be pointing at the same currentColor object, not a copy. My advice is to make a copy and then assign that into the array.
It would be much better if you could give me more code to look at. For instance, the loop that contains that code segment would be nice. If I find a different error I'll edit my answer.
here i'm creating and then adding simple 0xRRGGBB color objects into a vector. the color objects are then parsed into 0xRRGGBB hexadecimal strings and traced.
certainly it's not exactly what your looking for, but hopefully it will help you.
var red:uint = 0xFF0000;
var green:uint = 0x00FF00;
var blue:uint = 0x0000FF;
var colors:Vector.<uint> = new Vector.<uint>()
colors.push(red, green, blue);
for each (var color:uint in colors)
{
var output:String = color.toString(16);
while (output.length < 6)
output = "0" + output;
trace("0x" + output.toUpperCase());
}
Output:
//0xFF0000
//0x00FF00
//0x0000FF