Bilgisayar Grafigine Giris

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Bilgisayar Grafigine Giris

• CS 351

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Bilgisayar Grafigi Nedir?

• Geometrik sekillerin Üretilmesi, Islenmesi ve
  Depolamasidir.
• Cisimlerin bilgisayar ekraninda
  görüntülenmesidir.
• Resimleri hayal etme ve islemedir
• Sayisal verilerin görsellestirilmesidir

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Film Endüstrisi
Slide information from Leonard McMillian's slides
http//www.cs.unc.edu/mcmillan/comp136/Lecture1/
compgraf.html
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Oyun Endüstrisi
Slide information from Leonard McMillian's slides
http//www.cs.unc.edu/mcmillan/comp136/Lecture1/
compgraf.html
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Tip dünyasi
Nanomanipulator, UNC
Joe Kniss, Utah
Gordon Kindelman, Utah
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Bilgisayar Destekli Tasarim
ProEngineer, www.ptc.com
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Atmosfer Bilimleri
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Bilgisayar Grafigi Nedir?

• Donanim
• Isleme
• Etkilesim
• Modelleme
• Bilimsel Görsellestirme

Slide information from Richard Riesenfeld
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Hizla Degisen Donanim

• CPU ve GPU daki degisimler

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Isleme

• Çogu düsünce ve hayaller Bilgisayarda isleme ile
  yapilmaktadir.
• Efektler verilmektedir

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Resim Isleme, efektler
Sabah
Aksam üstü
a preetham, et. al., utah
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Resim isleme
Yapma
Gerçek
Shirley, et. al., cornell
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Sizce bu resim gerçekmidir?
m fajaro, usc
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Arazi Modellemesi Kar örtüsü ve Agaçlar eklendi
s premoze, et.al., utah
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Büyüme Modelleri
o deusson,
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Islenmis, modellenmis saçlar
http//www.rhythm.com/ivan/hairRender.html
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Gerçekmi?
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Gölgeleme
a gooch, et. al., utah
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Gerçekçi olmayan islemeler
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3 Boyutlu manzaralar
Fuchs et.al., UNC
UNC and UVA
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360o lik tarama
p willemsen, et. al., utah
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Etkilesim
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Modeller olusturma
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Modeller olusturma
D Johnson and J D St Germain, Utah
Russ Fish et al., Utah
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Bilimsel Görsellestirme
Johnson et al., Utah
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Position
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Position

• Determining the Position is analogous to a
  photographer deciding the vantage point from
  which to shoot a photo
• Three degrees of freedom x, y, and z coordinates
  in 3-space
• This x, y, z coordinate system is right-handed
  if you open your right hand, align your palm and
  fingers with the x axis, and curl your middle
  finger towards the y axis, your thumb will point
  along the z axis

This is a left-handed coordinate system. Not used
in 123.
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Orientation

• Orientation is specified by a point in 3D space
  to look at (or a direction to look in) and an
  angle of rotation about this direction
• Default (canonical) orientation is looking down
  the negative z-axis and up direction pointing
  straight up the y-axis
• In general the camera is located at the origin
  and is looking at an arbitrary point with an
  arbitrary up direction

camera Position
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View Angle (1/2)

• Determines amount of perspective distortion in
  picture, from none (parallel projection) to a lot
  (wide-angle lens)
• In a frustum, two viewing angles width and
  height angles
• Choosing View angle analogous to photographer
  choosing a specific type of lens (e.g., a
  wide-angle or telephoto lens)

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View Angle (2/2)
Resulting picture
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Front and Back Clipping Planes

• Volume of space between Front and Back clipping
  planes defines what camera can see
• Position of planes defined by distance along Look
  vector
• Objects appearing outside of view volume dont
  get drawn
• Objects intersecting view volume get clipped

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