particles sprite index

[dominic bélanger <lowtunes1(at)yahoo.ca>]

Hi ,

    im trying to to assign randomly a start frame from a sequence to each particle in the cloud ,i've done two kinds of code , one in jscript with 2 particle event and particle attriubute, and one in c++ in both cases xsi crash in the render i think mental ray doesn't like this ,but if anyone has a solution thanks in advance!

 

 here is a snipet of my code

 

//get the the sprite index for each particles

srand( (unsigned)time( NULL ) );

CLongArray in_SpriteIndexArray; // collect index each particle

CLongArray in_AgeArray; // collect age of each particle

 

ParticleCloudPrimitive in_CloudPrim(in_Cloud.GetActivePrimitive());

 

in_CloudPrim.GetAgeArray(in_AgeArray);

in_CloudPrim.GetSpriteIndexArray(io_SpriteIndexArray);

 

for(LONG i=0 ;i < io_SpriteIndexArray.GetCount(); i++)

{

//get a random number to start de sprite sequence

//between o and in_FrameCount

LONG oRandIndex = (double)(rand() / (double)RAND_MAX)*in_FrameCount;

 

     if(in_AgeArray[i] == 0)

    {

         io_SpriteIndexArray[i] = oRandIndex; // give a random start

    }

    else

    {

         io_SpriteIndexArray[i] = io_SpriteIndexArray[i]+ in_AgeArray[i]; //increment with particle age

    }

}

// output the value to cloud

in_CloudPrim.PutSpriteIndexArray(io_SpriteIndexArray);

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