Particle stick to surface expression

Particle stick to surface expression

//Attributes


//Creation
particleShape1.goalPP = 0;
particleShape1.randI = rand(0,9);
//particleShape1.randR = <<rand(0,15),rand(0,360),rand(0,15)>>;
particleShape1.radiusPP = rand(.2,1.2);
particleShape1.randomRotationX = rand(180);

// runtime after dynamics
vector $p = particleShape1.position;
vector $normal = particleShape1.goalWorldNormal0PP;
vector $worldUp = <<0,1,0>>;
float $rotZ = rad_to_deg(( atan2( ($normal.y), ($normal.x) ) ));
float $rotY = rad_to_deg(( asin( -($normal.z) ) ));
particleShape1.rotationPP = << particleShape1.randomRotationX, $rotY, $rotZ >>;
particleShape1.rgbPP = rgbaToColorAndAlpha1.outRgbPP;


// runtime before dynamics
if (particleShape1.collisionU > -1)
	{
	particleShape1.goalPP =1;
	particleShape1.goalU = particleShape1.collisionU;
	particleShape1.goalV = particleShape1.collisionV;
	particleShape1.traceDepthPP=0;
	}