VEX Attribute Glossary - Revision history

Admin: /* DOP RBD Constraint Attributes */

2023-03-17T18:48:18Z

DOP RBD Constraint Attributes

← Older revision		Revision as of 18:48, 17 March 2023
Line 281:		Line 281:
	i@selfcollisionallowed // Toggle self collisions (Only non-SDF Geometric Collision).		i@selfcollisionallowed // Toggle self collisions (Only non-SDF Geometric Collision).
	i@selfcollisionresolved // Unresolved toggle self collisions (Only non-SDF Geometric Collision).		i@selfcollisionresolved // Unresolved toggle self collisions (Only non-SDF Geometric Collision).
			i@propagate_rate // Specifies how impulses from collisions spread across the Constraint Network.
			i@propagationiterations // Specifies the number of impact propagation iterations for the glue bond.
	</syntaxhighlight>		</syntaxhighlight>

Admin at 11:18, 18 April 2022

2022-04-18T11:18:23Z

← Older revision		Revision as of 11:18, 18 April 2022
Line 5:		Line 5:
	It is a software interpreted language (execute instructions directly and freely, without previously compiling a program into machine-language instructions.) so provides the flexibility of scripting. However, it also has an implicitly SIMD evaluation approach.		It is a software interpreted language (execute instructions directly and freely, without previously compiling a program into machine-language instructions.) so provides the flexibility of scripting. However, it also has an implicitly SIMD evaluation approach.

	SIMD is short for Single Instruction/Multiple Data<ref>''[http://ftp.cvut.cz/kernel/people/geoff/cell/ps3-linux-docs/CellProgrammingTutorial/BasicsOfSIMDProgramming.html#:~:text=SIMD%20is%20short%20for%20Single,data%20is%20called%20scalar%20operations. BasicsOfSIMDProgramming]'', </ref>, meaning that your code (instruction) is executed over multiple data (vertices, points, primitives, pixels, voxels, etc).		SIMD is short for Single Instruction/Multiple Data<ref>''[http://ftp.cvut.cz/kernel/people/geoff/cell/ps3-linux-docs/CellProgrammingTutorial/BasicsOfSIMDProgramming.html#:~:text=SIMD%20is%20short%20for%20Single,data%20is%20called%20scalar%20operations. BasicsOfSIMDProgramming]''</ref>, meaning that your code (instruction) is executed over multiple data (vertices, points, primitives, pixels, voxels, etc).

	VEX is the workhorse for geometry, volume and simulation processing in addition to shading and compositing.<ref>''[http://www.multithreadingandvfx.org/course_notes/2015/houdini_threading.pdf Houdini Threading Presentation, Slide 7]'', </ref>		VEX is the workhorse for geometry, volume and simulation processing in addition to shading and compositing.<ref>''[http://www.multithreadingandvfx.org/course_notes/2015/houdini_threading.pdf Houdini Threading Presentation, Slide 7]''</ref>

Admin: /* Global Variables */

2022-04-18T11:18:01Z

Global Variables

← Older revision		Revision as of 11:18, 18 April 2022
Line 11:		Line 11:

	== Global Variables ==		== Global Variables ==
	A list of variables available in wrangles. The type indicator isn't necessary, but included as a reminder.<ref>''[https://www.sidefx.com/docs/houdini/vex/snippets.html#indexing sidefx.com/docs/houdini/vex/snippets.html]'', </ref>		A list of variables available in wrangles. The type indicator isn't necessary, but included as a reminder.<ref>''[https://www.sidefx.com/docs/houdini/vex/snippets.html#indexing sidefx.com/docs/houdini/vex/snippets.html]''</ref>
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	// Available in all SOP wrangles		// Available in all SOP wrangles
Line 39:		Line 39:
	i@resx, i@resy, i@resz //The resolution of the current volume.		i@resx, i@resy, i@resz //The resolution of the current volume.
	</syntaxhighlight>		</syntaxhighlight>

	== Common Geometry Attributes ==		== Common Geometry Attributes ==
	Houdini knows to cast these to the appropriate data type.		Houdini knows to cast these to the appropriate data type.

Admin: /* Viewport Display Attributes */

2022-04-18T11:17:39Z

Viewport Display Attributes

← Older revision		Revision as of 11:17, 18 April 2022
Line 393:		Line 393:

	== Viewport Display Attributes ==		== Viewport Display Attributes ==
	Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html#attributes sidefx.com/docs/houdini/model/attributes.html]'', </ref>		Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html#attributes sidefx.com/docs/houdini/model/attributes.html]''</ref>
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)		i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)

Admin: /* Copying and Instancing Attributes */

2022-04-18T11:10:22Z

Copying and Instancing Attributes

← Older revision		Revision as of 11:10, 18 April 2022
Line 417:		Line 417:
	== Copying and Instancing Attributes ==		== Copying and Instancing Attributes ==
	When copying or instancing, Houdini looks for these point attributes to transform each copy/instance.		When copying or instancing, Houdini looks for these point attributes to transform each copy/instance.
	https://www.sidefx.com/docs/houdini/copy/instanceattrs		<ref>''[https://www.sidefx.com/docs/houdini/copy/instanceattrs sidefx.com/docs/houdini/copy/instanceattrs.html]''</ref>

	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	p@orient // Orientation of the copy.		p@orient // Orientation of the copy.

Admin: /* Copying and Instancing Attributes */

2022-04-18T11:09:03Z

Copying and Instancing Attributes

← Older revision		Revision as of 11:09, 18 April 2022
Line 417:		Line 417:
	== Copying and Instancing Attributes ==		== Copying and Instancing Attributes ==
	When copying or instancing, Houdini looks for these point attributes to transform each copy/instance.		When copying or instancing, Houdini looks for these point attributes to transform each copy/instance.
			https://www.sidefx.com/docs/houdini/copy/instanceattrs
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	p@orient // Orientation of the copy.		p@orient // Orientation of the copy.

Admin: /* Viewport Display Attributes */

2022-04-18T11:08:21Z

Viewport Display Attributes

← Older revision		Revision as of 11:08, 18 April 2022
Line 393:		Line 393:

	== Viewport Display Attributes ==		== Viewport Display Attributes ==
	Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html#attributes ~~BasicsOfSIMDProgramming~~]'', </ref>		Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html#attributes sidefx.com/docs/houdini/model/attributes.html]'', </ref>
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)		i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)

Admin: /* Viewport Display Attributes */

2022-04-18T11:07:36Z

Viewport Display Attributes

← Older revision		Revision as of 11:07, 18 April 2022
Line 393:		Line 393:

	== Viewport Display Attributes ==		== Viewport Display Attributes ==
	Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html. BasicsOfSIMDProgramming]'', </ref>		Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html#attributes BasicsOfSIMDProgramming]'', </ref>
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)		i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)

Admin at 11:06, 18 April 2022

2022-04-18T11:06:16Z

← Older revision		Revision as of 11:06, 18 April 2022
Line 393:		Line 393:

	== Viewport Display Attributes ==		== Viewport Display Attributes ==
	Override the viewport display mode https://www.sidefx.com/docs/houdini/model/attributes.html		Override the viewport display mode <ref>''[https://www.sidefx.com/docs/houdini/model/attributes.html. BasicsOfSIMDProgramming]'', </ref>
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)		i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)

Admin: /* Viewport Display Attributes */

2022-04-18T11:04:18Z

Viewport Display Attributes

← Older revision		Revision as of 11:04, 18 April 2022
Line 393:		Line 393:

	== Viewport Display Attributes ==		== Viewport Display Attributes ==
	Override the viewport display mode		Override the viewport display mode https://www.sidefx.com/docs/houdini/model/attributes.html
	<syntaxhighlight lang='C++'>		<syntaxhighlight lang='C++'>
	i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)		i@gl_wireframe // Detail attribute, force wireframe (1) or shaded (-1)