Changing particles look on camera distance

[nelsig]

Ok with help of some existing threads

I'm happy with this script... but there is just someting I would like to add... it's when the diamonds appear I want to scale it from zero to 1... any Idea how to do it ?

// DISTANCE BETWEEN PARTICLE AND CAMERA
vector $camPosition = <<camera1.translateX, camera1.translateY, camera1.translateZ>>;
vector $particlePosition = particleShape1.worldPosition;
particleShape1.distanceToCamPP = mag($particlePosition-$camPosition);

// ATTRIBUTE NULL OR DIAMOND OBJECT
if (particleShape1.distanceToCamPP < 20)
{
particleShape1.customIndex = 1;
}
else
{
particleShape1.customIndex = 0;
}

// SCALE DIAMONDS WITH CAM DISTANCE
particleShape1.distanceSize = ?????

[du-j]

I just added couple lines of code.
Try this one:

// DISTANCE BETWEEN PARTICLE AND CAMERA
vector $camPosition = <<camera1.translateX, camera1.translateY, camera1.translateZ>>;
vector $particlePosition = particleShape1.worldPosition;
particleShape1.distanceToCamPP = mag($particlePosition-$camPosition);
// ATTRIBUTE NULL OR DIAMOND OBJECT

if (particleShape1.distanceToCamPP < 20)
{

particleShape1.customIndex = 1;


float $smoothScale = smoothstep(particleShape1.changeTime,(particleShape1.changeTime+particleShape1.interval),age);
if ($smoothScale !=1)
particleShape1.distanceSize = $smoothScale;

//Change scale smoothly from 0 to 1
}

else
{
particleShape1.customIndex = 0;
particleShape1.distanceSize =1;


particleShape1.changeTime = time;
//Remember the time the diamonds appear

}

"changeTime" is the time that the diamonds appear.
"interval" desides how long the diamonds will take to change scale from 0 to 1.
I chose command "smoothstep" ,and you can try the "linstep" as well.
Hope that will work.
And good luck!

[nelsig]

Thanks for that great scripting ... I was asking me how to create smooth transition... your answer just come well

Thanks

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