Houdini PCG Translator

Welcome to the repository for the Houdini PCG Translator For Unreal.

This plug-in provides seamless integration between Houdini Engine and Unreal PCG, without any exchange files. Allow both PCGDataAsset input and output, and PCGComponent input. Also see Tutorial

Compatibility

This plug-in is reply on my custom HoudiniEngineForUnreal, so similar compatibility as the Houdini Engine, but only support Unreal >= 5.4 (Examples only run with 5.5).

Installation

1. In this GitHub repository, click Releases on the right side.

2. Download the Houdini PCG Transaltor zip file that matches your Unreal Engine Version.

3. Extract the HoudiniPCGTranslator and HoudiniEngine to the Plugins of your Unreal Project Directory.

   e.g. C:/Unreal Projects/MyGameProject/Plugins/HoudiniPCGTranslator and C:/Unreal Projects/MyGameProject/Plugins/HoudiniEngine

Tutorial/Example

Tutorial Require Unreal Engine >= 5.5 to run these examples. See /HoudiniPCGTranslator/Example/EUBP_HE_Example_PCGDataInput and /HoudiniPCGTranslator/Example/he_example_pcg_data_output in the content of this plug-in.

Usage Brief

Support both input and output of PCGDataAsset and input of PCGComponent(Using actors(world) input)

Support PCGPointData, PCGSplineData and PCGDynamicMeshData(>= 5.5)

Here are some attributes for PCG data input and output

i@unreal_output_pcg_data_asset

= 1 on detail, curves/points will output as PCGSplineData/PCGPointData in PCGDataAsset

@unreal_pcg_attribute_*

define a PCG attribute, support float, int, vectors, transform, quaternion, object path, string etc.

s@unreal_object_path

define where PCGDataAsset should be created at.

@P, p@rot, v@scale

General attributes for PCGSplineData and PCGPointData input and output. For PCGSplineData input, must add parm tag { import_rot_and_scale = 1 } to operator path input parm.

f@density, v@Cd, f@Alpha

General attributes for both PCGPointData input and output

v@unreal_spline_point_arrive_tangent, v@unreal_spline_point_leave_tangent

Attributes for specify point tangents on PCGSplineData

i@curve_closed

on curves, to define whether a spline is closed or open

i@curve_type

if no tangents found, then this attribute can be used to set spline point as linear( = 0)