Should I Go to the Bathroom Now? Sketch of physics input from 6 - - PowerPoint PPT Presentation

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Should I Go to the Bathroom Now? Sketch of physics input from 6 - - PowerPoint PPT Presentation

Jan 23, 2024 354 likes •666 views

Should I Go to the Bathroom Now? Sketch of physics input from 6 players on Kinect Me, playing with my balls Introduction Who am I? Chris Jurney! Introduction Who is Double Fine No, I will not buy you lunch Introduction

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Should I Go to the Bathroom Now?

  • Sketch of physics input from 6 players on

Kinect

  • Me, playing with my balls
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Introduction

  • Who am I?

Chris Jurney!

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SLIDE 4
  • Who is Double Fine

Introduction

  • No, I will not buy you lunch
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Introduction

  • What is DFHAT?
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Introduction

  • Gameplay video…
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Introduction

  • Sizzle video
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The Problem

  • Motivation for Motion Blobs
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The Problem

  • Inputs (Kinect buffers)

Depth 6 Player Indices

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The Problem

  • Affecting the game
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The Solution

  • Problem with traditional vision solutions
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The Solution

  • Hacks to the rescue!
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Processing

1) Calculate motion 2) Filter motion c) Label image 4) Correlate labels over time to create blobs V) Create game inputs from blobs

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Calculate Motion

  • Compare to previous frame
  • Accept pixels new to the player &

player pixels with significant Z change

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Filter Motion

  • Blob shrink

– Clear noninterior pixels – Eliminates noise

  • Blob grow x 2

– Set pixels touching edge – Merges slightly disconnected areas

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Filter Motion

Motion Shrunk Grown x 2

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Label Image

  • For every untouched motion pixel

– Flood to all touching cells, setting the label – Calculate a 3D center of mass

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Motion & Label Video

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Correlate Labels

  • Find new labels to match all the old labels
  • Biggest old blobs first
  • Axes of comparison:

– Player index – Center of mass vs. predicted position – Cell count

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Correlate Labels

  • If a match is found, update the blob

– Smooth out motion – Smooth out size

  • If a match is not found, ZOMBIE BLOB

– Extrapolate motion

  • Kill off old zombies
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Correlate Labels

  • Make new blobs for remaining big labels
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Gameplay Effects

  • Convert blobs to

collision spheres

  • Size is based on

blob area

  • Center is 3d center
  • f mass
  • Calculate gestures

from history

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Blob Debug Video

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Pros

  • Efficient to calculate
  • Quick to implement
  • Action correlated to motion
  • Efficient collision representation with

velocities

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Cons

  • Only useful for crude gestures
  • Collision generated is innacurate
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Payoff Video

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