Houdini custom Normals

[efour]

I need help I newly started with Houdini and doesn't know hot vops and vex works and I want to create a line where the normals are pointing in a different direction while keeping a 90-degree angle to the line. I fount a tutorial on the internet which only make the normals point in a random direction but not in the 90-degree angle I tried to set the normal direction to zero with floats and stuff but it always results in vex errors.

 

@N = sample_direction_uniform(rand(@ptnum));

rand nomrals.hip

[animatrix]

Hi,

There are many ways to do this. Here is one way:

float r = radians ( 360 * rand ( @ptnum ) );
float x = sin ( r );
float z = cos ( r );

@N = set ( x, 0, z );

 

[efour]

4 hours ago, animatrix said:

Hi,

There are many ways to do this. Here is one way:

float r = radians ( 360 * rand ( @ptnum ) );
float x = sin ( r );
float z = cos ( r );

@N = set ( x, 0, z );

 

float r = radians ( 360 * rand ( @ptnum ) );
float x = 0;
float z = 0;

@N = set ( 0, 1, r);

Thanks but the normals aren't random at a full 360 degrees and the normal size varies I need them no be uniform because I want them to drive the velocity of a pop simulation

 

edit: sorry my line was not on the right axis (wrong up vector) it works Thanks

Edited June 24, 2020 by efour
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