TECHNICAL PAPER Building Tools for Houdini 9

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Componentsand lighting will have to come from other lights in the scene. The only real purpose of this is to makesure something reasonable happens if the user tries to render the simulation.Tool ScriptsOptionsName: rbd_simpleLabel: RBD: SimpleTool Shelf Behaviour- Tool works on any geometry object selection in the viewport. It also works with no selections.- Takes selected object and references its display geometry to create DOPs RBD Objects.- If less than 3 objects are selected, the user is prompted to make additional object selections.These are optional- If a valid selection is made when tool script is completed, the tool is created with those objectsreferenced.- If the user chooses not to make a selection when tool script is completed, the simulation is createdwith default geometry – a torus, a sphere, and a teapot, piled into a stack.Tab Menu Behaviour Viewer PaneViewer Pane Mask(s): OBJ- Viewport is placed at the object level if it’s not there already to add RBD Simple.- Upon selecting the tool, the user is queried to make one or more selections. Upon completionof the selection(s), the tool is created with those objects referenced as new DOPs RBDObjects.Tab Menu Behaviour Network PaneNetwork Pane Mask(s): OBJ- Network pane must be an object network to add RBD Simple. It is not available to any othercontexts.- Upon selecting the tool, the RBD Simple asset is added to the network. The user is then expectedto reference the appropriate geometry objects if desired. The user can do this by drag ‘n’drop into the object parameter fields of the RBD Simple asset parameter pane.Asset ScriptsNoneAsset(s)Rbd_simple- Single HDA that contains a SOP network and a DOP network.Shader(s)SurfaceAssign generic Mantra shader to extracted SOP geometry.DisplacementN.A.ProceduralN.A.Sourced DataNoneGenerated Data26 | TECHNICAL PAPER Rev 1.0
UI ElementsIconNone, unless the user wants to render the simulationUse custom designHandlesGeo objects have their regular handles, and those are used to position the objects in space. Thetransform is inherited into the DOPs simulation as the initial position of each object.ToolBoxN.A.ExamplesN.A.Like ToolsNoneResourcesReferences- Dr Seuss DOPs example file developed for demonstration purposesBuilding Tools for Houdini 9 | 27
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Page 3 and 4: Scripts: HOUDINI_SCRIPT_PATH 23Pyth
Page 5 and 6: 2.What are Tools and how are they u
Page 7 and 8: inside it. If Create in Context is
Page 9 and 10: ▪ ▪ Name is the internal name o
Page 11 and 12: 4.Steps to Develop a ToolIn this se
Page 13 and 14: 5.Designing Tools for Wider Distrib
Page 15 and 16: Parameters Folder3.The Gear Menu al
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Page 20 and 21: equivalent Python commands hou.Node
Page 22 and 23: the section Distribution with Expli
Page 24 and 25: to the Houdini on-line help.Distrib
Page 28 and 29: Appendix B: Help Card Format with W
Page 30 and 31: Use heading 3s to represent paramet
Page 32 and 33: Examplehelp URLOBJSOPPOPDOPPOPCOP2t
Page 34 and 35: Components Description:FILE - is th
Page 36 and 37: Appendix E: ReferencesLearning Pyth
Page 38: Side Effects SoftwareProduction Con

TECHNICAL PAPER Building Tools for Houdini 9

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