Houdini Python - 07 Arnold Look-dev HDA Part - III
- Ravi Motwani
- Jul 7, 2024
- 2 min read
Part - 3 'Camera'
Brief Thought:
"This is a relatively simple and small section, where the camera's orientation, tilt, and transformation have been integrated into the HDA UI.
We have observed the distinction between using a single node for both transformation and orientation, which utilizes local coordinates, versus using separate nodes for each action, namely transformation and orientation, which utilize relative coordinates."
Camera Section:

Details :
Orientation - a choice to rotate the camera around the asset in the Y direction, which is horizontally, at intervals of 45 degrees.
Tilt - When adjusting the asset, you have the option to view it from either the top or bottom perspective. This adjustment is referred to as 'Pitch' and is limited to values between -20 and +20.
Transform - A straightforward choice to translate in the X, Y, or Z direction.
Look-dev Camera Properties / Look-dev Camera View Properties : This option provides all the parameters found in the view section of the look-dev camera, including resolution and focal length.
Dive in Deep :

Two nodes ( type null ) will be inserted below 'ldev_camera_ctlr' node,
Orient Null ( 1st Null node ) :
The reference linked to the orient parameter will be applied to the Y rotation with help of channel referencing and then multiplied by 45 for the specified time period.
ch( "/..orient_parm" )*45
Tilt Null ( 1st Null node ) :
The reference linked to the tilt parameter will be applied to the X rotation with help of channel referencing.
ch( "/..tilt_parm" )
Transform - Better Named Translate ( 2nd Null Node ) :
The reference is connected to the translation of the second null node through channel referencing.
Camera View Properties ( Referencing the camera node ) :

By using "From Nodes" in the properties dialog, you can easily choose any parameter or folder to include in the HDA.
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