1. In October (2012) I started a workshop at CGSociety to learn the basics of Houdini.
    In the fifth week we looked deeper into particle manipulation to create some cool simple effects. As you see, one of those effects is a vortex (aka tornado) effect. The setup starts with a tube to create the shape from which a volume is created. In that volume, points get scattered. With a VOP SOP, the normal information of those points is created and manipulated to get the downward spiraling direction. That normal information is put into a volume to reference from in the PopNet and steer the particles. Those particles also get some noise in a Force POP and get killed once they hit the ground.
    The cool thing with setups like this, is that you can put in a different source, leave everything else and you get a whole new variation on your effect. I show this by instead of using the scattered points, I plug in a circle from which the points of the corners are used as the source. (I use cache nodes to quickly switch between the variations, instead of having to sim them during recording).
    The boxes that get copied onto the particles receive the normal information for their orientation and get scaled by the length of the particle velocity.
    And I suppose those other 2 variation setups kind of speak for themselves :)

    This was one of two effects we did that week. You can view the other effect here: vimeo.com/56115821

    # vimeo.com/56101872 Uploaded 4,748 Plays 5 Comments
  2. My current development.
    Digital asset for creating production ready animated trees and other plants. A few types of wind (Real time wind system and accurate dynamic wind), many many options to customize plant as you wish. Additional examples of wind animation will be a little later.
    Basically, you need only 8 hours to create fully dynamical 3d tree. (2-3 hours for tweak a shape and all other time for dynamic)

    Implemented by python, HDK, and a few standard nodes.

    - Module system for any kinds of vegetation
    - All in one DA
    - Maximum flexibility
    - Fast internal modules based on HDK ( C++)
    - Auto smooth trunks
    - Dynamics
    - Leaves mesh builder

    Please, feel free to contact me any time.
    Thanks.

    # vimeo.com/58316944 Uploaded 24.6K Plays 31 Comments
  3. Download link for Hip file. (Scroll to bottom of the page)
    rohandalvi.net/blog/

    This tutorial covers a basic introduction to particles in Houdini 13.

    Topics covered in this video are as follows:

    Basics of particle emissions
    Emitting particles from Geo and attributes
    Adding velocity at Geometry level
    Adding forces
    Using Vex Expressions
    Creating groups and using Wrangle POP
    Creating custom turbulence Force using VOPS
    Adding color and scale for rendering
    Caching particles to disk

    regards
    Rohan Dalvi
    rohandalvi.net/
    Signup for my newsletter
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    # vimeo.com/95644892 Uploaded 53.3K Plays 36 Comments
  4. This is a simple tutorial on how to transform or morph points from one object to another using VOPS and then adding additional details to make the final result more interesting.

    You can download the file at the link given below
    rohandalvi.net/blog/2014/11/25/point-transformation-in-houdini

    SPECIAL ONE DAY DISCOUNT - 20th Dec.
    $10 off on each part of "Tea and Cookies" and "Floating Island" Series
    rohandalvi.net/commercial

    regards
    Rohan Dalvi

    # vimeo.com/112711809 Uploaded 26.6K Plays 28 Comments
  5. Этот видеоурок требует знания интерфейса Houdini и основ CHOPs. Об этом идет речь в моих предыдущих уроках, которые находятся в этом альбоме:

    Уроки Houdini

    Хронометраж: 40 минут.

    Содержание:
    - Проекция карты на сферу
    - Использование ноды Trace
    - Создание процедурной анимации с помощью аттрибутов
    - Доработка анимации в CHOP network

    ВНИМАНИЕ!
    В 15-й версии Гудини не работает инициализация нормалей через ноду Point. Вместо нее нужно поставить ноду Normal и в ней выбрать Add normals to points.

    Автор урока: Станислав Демченко.
    Композитор: Константин Кепке (soundcloud.com/konstantin-kepke).

    В уроке используется эта текстура: dl.dropboxusercontent.com/u/9514939/earth_inv.rat
    drive.google.com/file/d/0B8uyUIXGQ2dEbE1oNktvanJlWFU/view?usp=sharing

    # vimeo.com/117814029 Uploaded 4,802 Plays 15 Comments

My Houdini Turorial

Shizuya

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