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johnjo

Simple noise expression on float value

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Hi, sorry for the basic question but I am just switching from maya to houdini and am still asking the very basic questions.

I wondered if someone would mind explaining to me the most simple way to add noise to a float value with an expression (which also returns a float), preferably in a way where you can see a representation of the noise? For example like how in maya you can add a noise expression to a float parameter, for example: noise(time);

And then you could view the result in the graph editor like so:

grapheditor_noisetimebase.png?resize=605%2C404

 

Is there a houdini equivalent which is quick and simple enough for me to understand? :D

 

Thanks a lot!

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Thanks a lot Kiryha!

I don't suppose there is a straightforward way to visualise the noise, similar to the maya screen grab?

 

Many thanks,

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1. After you add noise to the parameter (example expression: "noise($T, 0, 0)"), Shift+Click on the parameter field to open Animation Editor. It will show the graph you are looking for:

channel_noise.png.f9a498a243800e512af004f6e838631f.png

 

2. Noise in 1D/2D/3D can be visualized in many ways using SOPs:

visualize_noise_1d.png.4d725578b6c4b385d6c6ce08a6d1b690.pngvisualize_noise_2d_grid.png.ef5b08ffd3ad95037b44a1606c0b35db.pngvisualize_noise_2d_hf.png.a4043f9a4f35f97027c6a724bf1c6db1.pngvisualize_noise_3d_vf.png.1ca9091525de6f4ad1375b8ca3b6b597.pngvisualize_noise_3d_volume.png.e66ff6fd75e9e4a97b3105c47bcf3ce9.png

visualize_noise.hipnc

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3 hours ago, johnjo said:

Thanks a lot Kiryha!

I don't suppose there is a straightforward way to visualise the noise, similar to the maya screen grab?

 

Many thanks,

Ooh turns out it actually just shows it in the animation editor in the same way when you scope it. Thanks a lot,

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4 hours ago, f1480187 said:

1. After you add noise to the parameter (example expression: "noise($T, 0, 0)"), Shift+Click on the parameter field to open Animation Editor. It will show the graph you are looking for:

channel_noise.png.f9a498a243800e512af004f6e838631f.png

 

2. Noise in 1D/2D/3D can be visualized in many ways using SOPs:

visualize_noise_1d.png.4d725578b6c4b385d6c6ce08a6d1b690.pngvisualize_noise_2d_grid.png.ef5b08ffd3ad95037b44a1606c0b35db.pngvisualize_noise_2d_hf.png.a4043f9a4f35f97027c6a724bf1c6db1.pngvisualize_noise_3d_vf.png.1ca9091525de6f4ad1375b8ca3b6b597.pngvisualize_noise_3d_volume.png.e66ff6fd75e9e4a97b3105c47bcf3ce9.png

visualize_noise.hipnc

Thanks a lot! (I missed your post earlier- I should have refreshed lol).

This is great, just what I was looking for, thanks so much.

Cheers,

 

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