Surface Operator (SOP) Sample Code

This directory contains sample code for generating custom SOPs. Refer to the toolkit documentation for more details.

Flatten SOP

The flatten SOP will project all points in a geometry detail onto a plane. There are controls for setting the plane.

SOP_Flatten.C
SOP_Flatten.h Source for the flatten SOP
SOP_flatten.icon Icon for the flatten SOP

Star SOP

The star SOP will generate polygonal stars. The number of points can be specified. As well, this SOP illustrates how to put in "interrupt" checking via the UT_Interrupt class. If the SOP takes too long to cook, the user can interrupt the cooking.

SOP_Star.C
SOP_Star.h Source for the star SOP
SOP_star.icon Icon for the star SOP

SParticle SOP

This is just a simple particle system simulation. It includes some sample collision handling.

SOP_SParticle.C
SOP_SParticle.h Source for the SParticle SOP
SOP_sparticle.icon Icon for the SParticle SOP

Blind Data SOP

This SOP demonstrates how a SOP can save its own custom information into the .hip file. It's cook method merely propogates the incoming geometry, but when the .hip file is saved, it adds a extra packet to the .hip file containing "This is my private data".

SOP_BlindData.C
SOP_BlindData.h Source for the BlindData SOP

Detail Attrib SOP

This is a very trivial SOP to show how one can add detail attribs inside a SOP.

SOP_DetailAttrib.C
SOP_DetailAttrib.h Source for the Detail Attrib SOP

Brush Hair Len SOP

This is a sample SOP to show how to bind a selector & write a custom state to provide the brushing of attributes.

SOP_BrushHairLen.C
SOP_BrushHairLen.h This code provides the interface to the Brush operations. It sets up the brush to certain user defined & hardcoded values, creates an attribute called "hairlen", and creates hairs in the y direction with length from that attribute.

MSS_BrushHairLen.C
MSS_BrushHairLen.h This implements & registers the custom brush state which is used by the SOP_BrushHairLen.

MSS_BrushHairLenSelector.C
MSS_BrushHairLenSelector.h This implements & registers the custom selector used by SOP_BrushHairLen. It also binds the selector to the SOP_BrushHairLen.

SOP_tkt_brushhairlen.icon The icon for the hair length brush.

MSS_BrushHairLen.ui The UI file which describes the popup menu for the hair length bursh state.

Flatten SOP
The flatten SOP will project all points in a geometry detail onto a plane. There are controls for setting the plane.
SOP_Flatten.C SOP_Flatten.h	Source for the flatten SOP
SOP_flatten.icon	Icon for the flatten SOP
Star SOP
The star SOP will generate polygonal stars. The number of points can be specified. As well, this SOP illustrates how to put in "interrupt" checking via the UT_Interrupt class. If the SOP takes too long to cook, the user can interrupt the cooking.
SOP_Star.C SOP_Star.h	Source for the star SOP
SOP_star.icon	Icon for the star SOP
SParticle SOP
This is just a simple particle system simulation. It includes some sample collision handling.
SOP_SParticle.C SOP_SParticle.h	Source for the SParticle SOP
SOP_sparticle.icon	Icon for the SParticle SOP
Blind Data SOP
This SOP demonstrates how a SOP can save its own custom information into the .hip file. It's cook method merely propogates the incoming geometry, but when the .hip file is saved, it adds a extra packet to the .hip file containing "This is my private data".
SOP_BlindData.C SOP_BlindData.h	Source for the BlindData SOP
Detail Attrib SOP
This is a very trivial SOP to show how one can add detail attribs inside a SOP.
SOP_DetailAttrib.C SOP_DetailAttrib.h	Source for the Detail Attrib SOP
Brush Hair Len SOP
This is a sample SOP to show how to bind a selector & write a custom state to provide the brushing of attributes.
SOP_BrushHairLen.C SOP_BrushHairLen.h	This code provides the interface to the Brush operations. It sets up the brush to certain user defined & hardcoded values, creates an attribute called "hairlen", and creates hairs in the y direction with length from that attribute.
MSS_BrushHairLen.C MSS_BrushHairLen.h	This implements & registers the custom brush state which is used by the SOP_BrushHairLen.
MSS_BrushHairLenSelector.C MSS_BrushHairLenSelector.h	This implements & registers the custom selector used by SOP_BrushHairLen. It also binds the selector to the SOP_BrushHairLen.
SOP_tkt_brushhairlen.icon	The icon for the hair length brush.
MSS_BrushHairLen.ui	The UI file which describes the popup menu for the hair length bursh state.

Install Script

sample_install.sh is a sample install script.

The script will first compile the sample source code, then install the icons so that Houdini will find them. By default, everything is installed in your home directory.