USIGN LOGO TO MODEL AND ANIMATE

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USIGN LOGOTOMODEL AND ANIMATE

• Pavel Boytchev
• EUROLOGO 2005, WARSZAWA
• 27-31 AUGUST 2005

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ABOUT THE PRESENTATION

• Why using Logo to model and animate?
• Tree models
• Spying eyes
• Water waves
• Ghost stories
• Final words

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WHY LOGO ? WHY ANIMATIONS ?

• A language for childrenDeveloped low threshold
  and not well utilized high ceiling
• Myths enforced by industryProfessional
  programming languages and Logo
• Logo is as strong as the combined power of all
  Logo dialectsStudents' questions help us show
  the power of Logo

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MODEL 1SPYING EYES
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SPYING EYESPROBLEMS

• The most expressive part of the face
• People have special sense of eyes
• Synchronizing eyes movements
• Real-looking eyes, not cartoon-like ones

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SPYING EYESMODEL

• Using a sphere for the shape

• Using texture for the details- a hand-made
  texture- no need to be too detailed

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SPYING EYESANIMATION

• Eye movement- synchronization- close-object
  focusing (non-parallel look)
• 3D variant of Logos TOWARDS- eigen axis of an
  object- vector from the eye to the target-
  individual processing of each of the eyes

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SPYING EYESDEMONSTRATIONS
0 - EYE MODEL
1 - PAIR OF EYES
2 - FLY ON NOSE
3 - RING OF EYES
4 - READING EYES
5 - TWO PAIRS
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MODEL 2WATER WAVES
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WATER WAVESPROBLEMS

• Water is all around us, and students naturally
  want to model it
• Always in movement
• Too complex to model precisely

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WATER WAVESMODEL AND ANIMATION

• A model cannot exist apart of the animation
• A grid of points oscillating up and down
• Interpolation of intermediate points

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WATER WAVESIN WARSZAWA
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WATER WAVES DEMONSTRATIONS
6 - SIMPLE WAVES
7 - DETAILED WAVES
8 - TEXTURED WAVES
9 - POOL FOUNTAIN
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MODEL 3GHOST STORIES
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GHOST STORIESPROBLEMS

• Ethereal appearance
• semitransparent bed-sheet body
• traditional ghostly head, hands lack of lower
  body
• Roving movements
• floating in the air
• soft, smooth transitions

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GHOST STORIESMODEL

• A virtual sheet
• a grid of 5x5 points
• Ghost hands
• left and right sides of the sheet

• Head and torso
• middle of sheet as head
• front and back sides for the torso

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GHOST STORIESANIMATION

• Similar control as in water waves
• Hands control points moved at once
• Various body parts move asynchronously
• Each movement based on oscillation

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GHOST STORIESFASHION SHOW
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GHOST STORIESDEMONSTERATIONS
10 - MAKING A GHOST
11 - ANIMATING
12 - GHOST STORIES
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FINAL WORDS
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THE END