Tryomg to make a forcefield

[rahulsg2901]

If you are using expression then if (HailShape.event == 1) its works. But you are using MEL then before assigning in the condition you must get attribute. So code is


float $value =` getAttr "HailShape.event" `;

if ($value == 1)
{
float $Rand=rand (1);
setAttr lambert2.transparencyR $Rand;
setAttr lambert2.transparencyG $Rand;
setAttr lambert2.transparencyB $Rand;
}
else
{
setAttr lambert2.transparencyR 0;
setAttr lambert2.transparencyG 0;
setAttr lambert2.transparencyB 0;
};

[Dragons0088]

Thank you for your quick response. I guess I was using expressions in the end anyway. For some reason my script doesnt work. I think it has something to do with the if command for the .event?

[Aikiman]

Excuse my deleted post but what is not working? Using your code changes the transparency of your shader.

The probem i see is that while event is equal to 1 and your p[article is still alive, then the shader's transparency will change every frame until event changes or the particle dies. I would instead create a collisionU pp attribute and test whether it is greater than zero instead of using event. If you turn on numeric particles you can see how the collisionU works.

Actually the event call does work but you have to kill the particle in the expression using lifespanPP==0 at the end of your expression rather than killing it in the event editor. The event editor kills the particle before it evaluates the expression.

[Aikiman]

mmmm, this doesnt seem to work with more than one particle in existance at one time.

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