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Assignment 1 –

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Week 1  – Houdini Recap

Dominos

 

 

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Week 2  – 

solver solves the thing that happens frame by frame – calculates what happens frame by frame

 

takes the initial condition

we need to define mass, force etc and hten solver calculates that so e g by frame 4 based on the attributes it would move to x

 

 

Vectors

 

Vector is a number like (2.2) MEASURED from the origin or a particular point in space

 

how do we use a vector

eg. vector called velocity – tells it where to go next frame – how much and where, maths tells it how much it will resist the motion,

 

P (1.1) + vel (2.2) = 3.3 in grid space

 

 

 

 

 

 

Dop network allows us to access the solvers

 

Simulation tab in dop network

substeps how many times we’re calculating the simulation but sometimes we have very fast simulatiosn in which case you might solve it every quarter or half frame, vellum at least 5,6 times per frame

 

start frame is the frame it starts calculating on

 

feedback loops

 

ctrl + up arrow – go back to frame 1 shortcut – always be at frame 1 when making simulations

 

any type of simulation flip pyro fluid will be in dop network

 

smoke has very different properties than fluid pyro etc

 

 

POP O

whenever u see a dollar sign itts a variable

 

$OS means take the name of the operator

 

 

 

POP Solver

Inside a dop net we can have multiple solvers

 

we dont have any particles in teh scene – we have to birth them or create them

 

the easiest way is to create pop location

particles have an age which means we can birht and kill them, age is important the HIT atributes can tell us about impact which has position inw rolds space where its hit amout of times its hit total amount of times etc

Id atribute keeps track of individual particles themselves

Life atribute tells how long its got  eg 2 seconds and then the age counts up, when age and life counts up it dies – age = life

v is the velocity – tells it where it will go on the next frame

 

 

 

 

impulse count emits points per frame

activation count emits points per second

 

life variance means they wont all die at the same time

 

will go on forever if theres no force- like space , on earth theres air force etc

 

static solver is anything for collision – static object it can be static or animated