Vex从入门到掌握Houdini Vex – From beginner to Intermediate

Houdini Vex – From beginner to Intermediate _ S1 Trailer

Houdini Vex – From beginner to Intermediate | S1 Trailer

Welcome to the Trailer of this Houdini Vex Series.
In 10 Episodes we will discover Vector Expressions in Houdini. This Trailer shows the topics we will cover and give you an idea what to expect from this series.

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Houdini Vex – What is Vex _ S1EP1

S1EP1 – What is Vex

Welcome to S1EP1 of this Houdini Vex Series.
Over the course of this series we will take a look at the fundamentals of vex.
Starting by what it is/ where to use it as well as different concepts and it’s built-in functions.

Timecodes
0:00 – Series Introduction
0:28 – What is Vex?

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Houdini Vex – Datatypes_Operators _ S1EP2

S1EP2 – Datatypes/Operators

Welcome to S1EP2 of this Houdini Vex Series.
Lets talk about Datatypes and Operators. In programming in general, a data type, is a classification that specifies which type of value a variable has.

Timecodes
0:00 – Datatypes
1:32 – Operators

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Houdini Vex – Attributes_Variables _ S1EP3

S1EP3 – Attributes/Variables

Welcome to S1EP3 of this Houdini Vex Series.
Lets talk about attributes and variables. Both of them contain data of a specific type and hold a value.

Timecodes
0:00 – Diffrences
0:30 – Variables
1:40 – Attributes

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Houdini Vex – Built-in functions _ S1EP4

S1EP4 – Built-in functions

Welcome to S1EP4 of this Houdini Vex Series.
Lets talk about built-in functions in vex. A function contains instructions used to create an output from its inputs.

Timecodes
0:00 – Definition
0:40 – rand()
1:30 – fit01()
2:10 – addpoint()

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Houdini Vex – Channels _ S1EP5

S1EP5 – Channels
Welcome to S1EP5 of this Houdini Vex Series.
Lets talk about channels. This function lets you create a parameter as an ui element of a specific type and returns its value.

Timecodes
0:00 – Definition
0:40 – Add Channels

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Houdini Vex – Neighbours_Nearpoints _ S1EP6

S1EP6 – Neighbours/Nearpoints
Welcome to S1EP6 of this Houdini Vex Series.
Neighbours and Nearpoints are two seperate functions, that return arrays of points. The main difference between both is, that Neighbour will return a pointnumber of the closest connected point of the input point. Connected in this case by an edge. Nearpoint will return a pointnumber of the closest point in space. So Connectivity (based on connected points) and Proximity (based on nearess in space).

Timecodes
0:00 – Definition
1:03 – Writing Arrays
1:38 – 1. Example – Nearpoint
2:49 – 2. Example – Nearpoints
5:22 – 3. Example – Neighbours

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Houdini Vex – Create_Modify Groups _ S1EP7

S1EP7 – Create/Modify Groups
Welcome to S1EP7 of this Houdini Vex Series.
Point or pimitive groups can simply be seen as integer attributes where 1 equals in the group and 0 not in the group. This attribute has the prefix group and houdini does detect that prefix and knows it is a group.

Timecodes
0:00 – Definition
0:48 – Writing Groups
1:45 – Conditions

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Houdini Vex – xyzdist_primuv _ S1EP8

S1EP8 – xyzdist/primuv
Welcome to S1EP8 of this Houdini Vex Series.
Primuv and xyzdist. These two are often mentiond in the same context since they play together very well. Primuv Interpolates the value of an attribute at a certain parametric (uvw) position. Xyzdist Finds the distance from a point to the closest location on surface geometry.

Timecodes
0:00 – Definition
0:32 – Written
1:15 – 1. Example – Primuv
3:45 – 2. Example – XYZdist
6:00 – 3. Example – Both

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Houdini Vex – Point Clouds _ S1EP9

S1EP9 – Point Clouds
Welcome to S1EP9 of this Houdini Vex Series.
A point cloud is a set of points in space that hold data, in our case attributes.
In the Houdini docs under vex function, you can filter pointcloud functions. We have around 37 functions associated with point clouds. They often have the prefix pc.

Timecodes
0:00 – Definition
1:50 – 1. Example – pcfilter
4:59 – 2. Example – pciterate/pcimport
8:35 – 3. Example – pcnumfound

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Houdini Vex – Create your own Function _ S1EP10

S1EP10 – Create your own Function

Welcome to S1EP10 of this Houdini Vex Series.
Houdini offers a large library of vex functions, but also gives you the possibility to write your own functions. With that, you can extend houdinis capabiliys even further.

Timecodes
0:00 – Definition
1:00 – 1. Example – Get density function
2:33 – 2. Example – createCircle

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