들어가며

• 후디니는 SideFx사에서 만든 노드 기반 모델링 툴로써 절차적 모델링이 가능하다

조작키

Overview

Object View

Ref

• 네트워크상 키

설정

houdini.env

C:\Users\pyoung\Documents\houdini19.5\houdini.env

# houdini.env

# EDITOR = "C:/Program Files/Microsoft VS Code/Code.exe -w"

환경변수

단축키

색상조정

• 후디니> Edit > Color Setting > Color collection 확인

파일

HDA

Houdini Digital Assets

• Introduction to HDA (Houdini Digital Asset) in Unreal Engine UE4 & Houdini for Beginners
• Foundation Module - All Lecture Series
  • HOUDINI 101 - 09 - Digital Assets & Unreal
  • https://ehoudiniacademy.com/foundation/

Geometry Node

• attr

  • https://www.sidefx.com/docs/houdini/model/attributes.html

• 기본

  • box
  • grid
  • tube
  • rubbertoy
  • tommy
  • platonic(tetrahedron/cube/octahedron/icosahedron/dodecahedron/soccerball/utahteapot)

• NURBS(Non-uniform rational basis spline)

• uv ref

  • https://qiita.com/jyouryuusui/items/e15d53e88e9cc018d18f
  • https://www.technical-artist.net/?p=111

point("../OUT_P", 0, "P", 1)  // OUT_P노드의 0번째의 point P의 Y좌표(xyz / 012)
prim("../OUT_Cd", 2, "Cd", 0) // OUT_Cd노드의 2번째의 primitive Cd의 Red채널값(rgb / 012)
opdigits(".") // 현재 노드의 이름의 숫자만 가져옴
rand(x) // 랜덤. 분포가 일정하게 되는데 그럴때 사칙연산을 내부적으로 넣어주기도 함

chramp("radious_ramp", @curveu) // 기어버튼으로 추가된 radious_ramp curveu의 위치 값을 가져온다
detail("../META/", "iteration", 0) // META에 있는 iteration의 0번째 값

• https://www.sidefx.com/docs/houdini/copy/tutorial_stamping.html

Step

• https://www.sidefx.com/docs/houdini/io/ocio.html

배우기

• 카피 파라메터
• 인스펙터 수정
• 디스플레이뷰 점사이즈/숫자

아치형

• 그리드 1x1 // 2-2
• 그룹 @P.y > 0
• 베벌 distance 0.5
• 퓨즈

체우기

• 중심축을 정해 transform해서 띄워주고
• mirror - reverse normal : No
• skin

스크립트

VEX

• VEX(Vector EXpressions)

  • https://www.sidefx.com/docs/houdini/ref/expression_cookbook.html

• jtomori/vex_tutorial

  • https://github.com/jtomori/vex_tutorial
  • https://jtomori.github.io/vex_tutorial/

• 에디터 설정

  • Edit > Preference > Set External Text Editor
  • VEXpression > 우클릭 > Expression > Edit in External Editor
  • Visual Studio Code에 VEX 플러그인

// C:\Users\ (UserName) \Documents\houdini19.0\houdini.env
EDITOR = "C:\Users\(UserName)\AppData\Local\Programs\Microsoft VS Code\Code.exe"

• 절대로 point() 또는 prim() 표현식을 사용하지 마십시오(expressions). VEX 대응만 사용하십시오.

• https://www.tokeru.com/cgwiki/?title=HoudiniVex

• https://www.sidefx.com/learn/vex/

• Attribute VOP

  • Vex 시각화 그래프

• Attribute Wrangle

  • Vex 코딩
  • Wrangle
    • This is a very powerful, low-level node that lets experts who are familiar with VEX tweak attributes using code.
    • https://english.stackexchange.com/questions/263712/what-does-come-on-lets-wrangle-up-the-cattle-mean
    • 소나 말들 관리

type@attribute

• geometry sheet에서 확인 가능

i@myint         = 5;                                        // i | int

f@myfloat       = 12.234;                                   // f | float
u@myvector2     = {0.6, 0.5};                               // u | float2
v@myvector      = {1,2,3};                                  // v | float3
p@myquat        = {0,0,0,1};                                // p | float4

2@mymatrix2     = {1,2,3,4};                                // 2 | float2x2
3@mymatrix3     = {1,2,3,4,5,6,7,8,9};                      // 3 | float3x3
4@mymatrix4     = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}; // 4 | float4x4

s@mystring      = 'a string';                               // s | string

d@mydict        = {};                                       // d | dict
d@mydict['key'] = 'value';

i[]@connected_pts = neighbours(0, @ptnum);                  // i[] | int[] array

https://sites.google.com/site/fujitarium/Houdini/sop/copy-sop

// https://www.sidefx.com/docs/houdini/vex/snippets.html
vector x0 = point(0, "P", @ptnum);
vector x1 = point(1, "P", @ptnum);


float dist = distance(x0, x1);
vector dir = normalize(x1 - x0);
vector next = x0 + dir * (dist / 2.0f);

@P = next;

@

geometry attribute

• https://www.sidefx.com/docs/houdini/model/attributes.html

Expression

$BBX = relbbox(@P).x
$BBY = relbbox(@P).y
$BBZ = relbbox(@P).z

ch

• https://www.sidefx.com/docs/houdini/vex/functions/ch.html

Function

vector currP = @P;

// 현재 위치에서 1번 지오메트리와 맨 처음으로 마주치게될 포지션.
vector hittedP = minpos(1, currP);

// 현재 위치에서 1번 지오메트리에 있는 모든 포인트 중 가장 가까운 포인트번호.
int nearPointNumber = nearpoint(1, currP);

// 1번 지오메트리의 nearpointNumber의 _id값.
int id = point(1, "_id", nearPointNumber);

quaternion

vector4 orient = quaternion(maketransform(@N, @up));
vector euler  = quaterniontoeuler(orient,XFORM_XYZ);
v@rot = degrees(euler);

// maketransform: https://www.sidefx.com/docs/houdini/vex/functions/maketransform.html

vector4  quaternion(matrix3 rotations)
vector4  quaternion(float angle, vector axis)
vector4  quaternion(vector angleaxis)

vector  qrotate(vector4 quaternion, vector v)
vector  degrees(vector nums_in_rads)
vector  quaterniontoeuler(vector4 orient, int order)

vector4  slerp(vector4 q1, vector4 q2, float bias)

vector4  qmultiply(vector4 q1, vector4 q2)

Python

• https://jtomori.github.io/2022/2022-07-07.html
• https://www.sidefx.com/docs/houdini/hom/commandline.html#hython

Windows > Hscript Textport(Alt + Shift + T)

/ -> help otedit
otedit

    REPLACED BY
      - hou.ui.openTypePropertiesDialog()

## hython path

Linux: /opt/hfs19.0.657/bin/hython
Windows: C:\Program Files\Side Effects Software\Houdini 19.0.657\bin\hython3.7.exe

// setting.json
"python.autoComplete.extraPaths" : [
  "C:/Program Files/Side Effects Software/Houdini 19.0.531/houdini/python3.7libs"
],

"python.autoComplete.preloadModules" : [
  "hou"
],

"python. analysis.extraPaths" : [
  "C:/Program Files/Side Effects Software/Houdini 19.0.531/houdini/python3.7libs"
]

• New Shelf...
  • New Tool...
    • Script

import hou

obj = hou.node('/obj')
myGeo = obj.createNode('geo', 'myGeo')
box = myGeo.createNode('box', 'myBox')

# print(box.ascode())
 
box.parm('sizex').set(10)

selected = hou.selectedNodes() # tuple
selected[0].setInput(0, selected[1], 0)

import Pyside2 as ps

VAT

C:/Program Files/Side Effects Software/sidefx_packages/SideFXLabs19.5/otls/SideFX_Labs.hda

// SideFX_Labs.hda

parm {
    name    "mat_unity_soft"
    label   "Unity Soft Material"
    type    string
    invisible
    default {}
}
parm {
    name    "mat_unity_rigid"
    label   "Unity Rigid Material"
    type    string
    invisible
    default { }
}
parm {
    name    "mat_unity_fluid"
    label   "Unity Fluid Material"
    type    string
    invisible
    default { }
}
parm {
    name    "mat_unity_sprite"
    label   "Unity Sprite Material"
    type    string
    invisible
    default { }
}

// https://github.com/sideeffects/SideFXLabs/blob/Development/unity/shaders/URP_VAT3/package.json

"com.sidefx.vat": "https://github.com/sideeffects/SideFXLabs.git?path=unity/shaders/URP_VAT3#Development"

Rigidbody

Geo
    Sphere
    RDB Material Fracture
    UV Unwrap
    Assemble
    RBD Bullet Solver
    - Transfer Attributes: orient pivot P
    - Transfer to Geometry: checked ???
    - Transfer to Proxy Geometry: unchecked ???

Out
Mode/Target Engine: Rigid-Body Dynamics(Rigid) / Unity
Settings
    Edge Case Handling
        Input Geometry Is Cached to Integer Frames: checked
        Texture Format: HDR(EXR/TIFF as RGBA 16/32 in Engine)

REF

• https://qiita.com/yasuhiro0122/items/1222b61549891af6c2f4
• https://medium.com/tech-at-wildlife-studios/texture-animation-techniques-1daecb316657

랜드스케이프

• HoudiniXUE4 활용하여 랜드스케이프에 어셋 배치하기

  • #1
  • #2
  • #3
  • #4
  • #5
  • #6

• node

  • HeightField - 지형에 쓸 기본 높이맵
  • HeightField Noise // noise type
  • HeightField Distort // noise type
  • HeightField Resample - resolution scale을 지정해줄 수 있어 terrain 의 디테일을 올리거나 내릴 수 있다.
  • HeightField Blur
  • HeightField Project // Combine Method

• 에픽 라이브 | 언리얼 엔진 이펙트에 후디니 활용하기

  • PART 1
  • PART 2
  • PART 3

Unity

• sidefx

  • https://www.sidefx.com/tutorials/unity-starter-kit/
    • https://www.sidefx.com/contentlibrary/unity-starter-kit/
  • https://www.sidefx.com/learn/unity/
    • https://www.sidefx.com/docs/unity/

• 유니티 엔진에서 후디니 엔진과 통신하는 것이므로 에디트모드일때만 동작한다.

Unreal

• UNREAL STARTER KIT
• 도시 샘플 퀵스타트 - Houdini를 사용해 도시와 고속도로 만들기
  • 도시, 고속도로
• Project Titan
  • 드래그 화물배치
  • 파이프
• Houdini Engine to Unreal Engine Workflow
  • 팬스

무료

https://learn.unity.com/project/getting-started-with-houdini-unity

• 독학.net
  • https://www.dokak.net/medieval-bricks
  • https://www.dokak.net/rain-drops-effects
• TWA 후디니의 정석
  • HOUDINI 최초 입문 강의
  • joy of vex
    • JOY_OF_VEX(한국어.ver)
    • https://www.tokeru.com/cgwiki/JoyOfVex
• https://www.youtube.com/c/houdini3d/videos
• http://wordpress.discretization.de/geometryprocessingandapplicationsws19/2019/10/17/lecture-progress/
• 모팩
  • https://cafe.naver.com/sidefx/9600
  • Houdini FX Class
• https://anopara.gumroad.com/
• 후디니 유저인터페이스& 활용
• 강의 후기? : https://gall.dcinside.com/board/view/?id=composition3d&no=41343
• QuickTips Houdini 17: Visualize Pieces and Cluster with Voronoi Sops in Houdini 17
• Procedural Bridge with Houdini and Unreal Engine 4 (UE4) - Showcase
  • https://www.youtube.com/watch?v=YDeJ5CluShc
  • https://reveron3d.com/portfolio/procedural-bridge-with-houdini-and-unreal-engine-4-ue4/
• Randomly generated procedural homes in Houdini tutorial
• [Houdini]간단한 Procedure UV
• Houdini/Ari Danesh(필수강좌)
  • http://cgamefancy.tistory.com/category/Houdini/Ari%20Danesh%28%ED%95%84%EC%88%98%EA%B0%95%EC%A2%8C%29
  • http://cgamefancy.tistory.com/category/Houdini/Ari%20Danesh%28%EA%B0%95%EC%A2%8C%ED%95%B4%EC%84%9D%29
• Houdini 30 Day Introduction to Python
• Foundation Module - The Foundation Project

Youtube Channel

• CGArtistAcademy
• Simon Houdini
• LoveDo
• c0d2x
• MotionDesignersCommunityTV
• ResilientPictureCompany
• https://www.youtube.com/c/fxguide
• https://www.youtube.com/c/MIXTraining
• https://www.youtube.com/@rohandalvi
  • Intro to Houdini
  • https://lucylueng.myblog.arts.ac.uk/2021/01/25/week1-rock-cabin/
• Wagner’s Webinars: Houdini VEX
• cgside
  • https://www.patreon.com/cgside
• IndiePixel3D

책

• 후디니로 구현하는 알고리즘 디자인
  • 원제 : ALGORITHMIC DESIGN WITH HOUDINI HOUDINIではじめる自然現象のデザイン 소득공제
    • https://www.youtube.com/c/JunichiroHorikawa/videos
  • 책 부록 소스: https://vielbooks.com/294
    • 암호: hdn320
    • 1
    • 2
    • 3
    • 4

유료

• 독학.net
  • https://www.dokak.net/puddles-ripples
• TWA 후디니의 정석
  • https://www.youtube.com/@TWAHOUDINI
• 발차기
  • https://www.balchagi.net/course/22spr-md-bsh1/
• cgstation
  • HOUDINI 절차적 모델링과 파괴시뮬레이션 풀패키지
• fxphd
  • https://www.fxphd.com/details/578/
  • https://www.fxphd.com/details/580/
• ??
  • https://cgworld.jp/special/houdinicookbookacademy/
• Houdini Procedural Lake Houses
  • https://anopara.gumroad.com/l/ngKUJ

???

• Houdini Tutorial Edge Damage
• https://houdinist.tistory.com/category/후디니%20튜토리얼%20소개

기타

• https://github.com/sideeffects/GameDevelopmentToolset
• https://github.com/wqaetly/HoudiniSamples
• https://houdinifx.jp/blog/gamedev-texture-sheet-%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6/
• https://blog.naver.com/edgerider/220602291985
• https://microbot.ch/new/procedural-building-modules/
• https://blog.naver.com/marnich/221659754394
• https://www.orbolt.com/
  • Create, upload, and share Houdini Digital Assets

etc2

• cascadeur - deep learning pose predication tool

• 하운드13의 '프로젝트 M'의 처절한 전투를 표현하기 위한 언리얼 엔진 활용법 | 언리얼 서밋 2021

  • 블러드 이펙트

• 언리얼 서밋 | 2020 | TA가 구현해본 대규모 캐릭터 시스템 - 1,000개의 캐릭터가 끊김없이 나오게 만들기

  • 언리얼LOD생성 퀄리티가 낮아 LOD생성을 후디니에서 함

• 에픽 라이브 | 러셀 | UE5에서 한국적인 아파트 절차적으로 생성하기

  • 번외 후디니가 아닌 블루프린트 만으로 절차적 생성

• 에픽 라이브 | 언리얼 엔진 이펙트에 후디니 활용하기

  • 1
  • 2
  • 3

• https://www.rohandalvi.net/advmodeling

• ディニ子をつくる：Houdiniでキャラクターモデリング

  • 후디니 케릭터 모델링

TA

• iiiiiiiffffffffffff
• Feike Postmes
• Adolfo Reverón

• 점을 선으로 잇기: add> polygons> by group
• 선을 나누기 : resample
• 내부 선 지우기: add> points> Delete Geometry But Keep the Points
• Rigid body dynamics : RBD to FBX
• 감마: Edit> Color Settings> Color correction> Gamma> 1
  • https://www.sidefx.com/docs/houdini/render/linear.html
• 각도설정
  • copytopoint로 circle을 점에 붙인다
  • carve의 U를 이용 각도를 가진 점을 얻고 - 포인트가 0부터 시작하는걸 변하게 하는게 좋을듯
  • 점과 점을 merge
  • add로 선을 이어주자 - polygons > By Group
• 어트리뷰트 비쥬얼라이제이션
  • 포인트 번호 표시해주는 툴바에 visualization 우클릭
• 디버그용 선을 이어보기
  • 어트리뷰트를 이용하여 정보용 점을 추가로 만들고
  • merge
  • Add> By Group> Add> By Attribute> Attribute Name 설정
• grid를 텍스쳐로 굽기
  • https://blog.naver.com/checkjei/222622327344
  • geo > grid / uvtexture / attribvop
  • Material Palette
    • Principled Shader 드래그
    • 드래그된것 우클릭 파라미터 편집 색 조정및 기타 러프니스등 조정
  • Network view 탭에서 out
    • baketexture 노드 생성
    • UV Object1에 geo노드 등록
    • Surface Unlit Base Color (basecolor) 선택
  • Render to Disk 버튼 클릭

플러그인

• 외부에디터