Multimedia Programming 2005

1
Multimedia Programming2005

• Class 6
• 3D

2
Course Notes
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Remember to hand in your assignment before 1700
  today!
• Ill be assisting today on the Trivial Pursuit
  assignment.
• This is the last class
• Grades over e-mail.
• Yesterdays e-mail.

3
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment
4
Contents
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Notes
• Introduction
• Binocular vision
• 3D recreation
• Computer representation
• Challenges
• 3D programming
• Assignment

5
Introduction
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Computer 3D images are NOT everywhere
• 3D games
• Animated movies
• Special effects in standard movies (LOTR)
• What is computer 3D?

6
3D perception
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Two types
• Monocular hints
• Binocular vision
• Both employed within 3D visualization techniques.

7
Monocular hints
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Motion Parallax
• Animals
• Color vision
• Perspective
• Relative Size
• Distance Fog
• Occlusion
• Focus

8
Binocular vision
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Stereopsis
• Convergence
• Disabilities
• painters

9
3D representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Mostly employs monocular hints
• Paintings or drawings
• 3D text
• Platform games
• 3D games
• Some binocular methods

10
3D representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Stereographic cards and viewers
• Crossed-eye viewing
• Transparency viewers (viewmaster)
• Head-mounted displays
• Glasses
• Shutter
• Polarized light
• Two-color anaglyph

11
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Mostly uses the monocular hints methods.
• Sometimes uses shutter glasses or head-mounted
  devices.

12
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Difference from 2D
• Actual 3D model is stored in computer
• Rendering to create 2

13
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Difference from 2D
• Actual 3D model is stored in computer.
• Rendering to create 2D image from current view.
• 3D modelling ? sculpting
• Rendering ? painting
• Why were early days 3D graphics blocky?

14
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Popular techniques OpenGL and Direct3D
• Large part of rendering done by hardware
  (accelerators).
• 3 Step paradigm
• Modelling
• Scene layout Setup
• Rendering

15
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Set form of the item or area
• Set properties (texture, lighting, etc.)
• Modeling techniques
• Polygons
• Constructive solid geometry
• Subdivision surfaces
• And more

16
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Scene setup prepare scene
• Camera points
• Light sources
• Objects
• Area
• Sometimes key-framing (animation)

17
Computer representation
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Rendering convert 3D scene into 2D image at any
  time.
• Compare with taking picture
• Employs difficult mathematical techniques
• Employs tricks like lens flares and motion blur
• From wireframe to radiosity

18
Computer challenges
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Getting it done
• Specifically
• Textures like hair, skin, clothes
• Fluids like water and blood

19
3D Programming
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• //load direct3D
• g_pD3D Direct3DCreate9( D3D_SDK_VERSION )
• //set parameters
• D3DPRESENT_PARAMETERS d3dpp
• ZeroMemory( d3dpp, sizeof(d3dpp))
• d3dpp.Windowed TRUE
• d3dpp.SwapEffect D3DSWAPEFFECT_DISCARD
• d3dpp.BackBufferFormat D3DFMT_UNKNOWN
• //create device
• g_pD3D-CreateDevice( D3DADAPTER_DEFAULT,
  3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROC
  ESSING, d3dpp, g_pd3dDevice )

20
3D Programming
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• g_pd3dDevice-Clear( 0, NULL, D3DCLEAR_TARGET,
  D3DCOLOR_XRGB(0,0,255), 1.0f, 0 )
• g_pd3dDevice-BeginScene() // Begin the scene.
• // Rendering of scene objects happens here.
• g_pd3dDevice-EndScene() // End the scene.
• // show the scene
• g_pd3dDevice-Present( NULL, NULL, NULL, NULL)
• // cleanup
• if( g_pd3dDevice ! NULL)
• g_pd3dDevice-Release()
• if( g_pD3D ! NULL)
• g_pD3D-Release()

21
3D programming
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• struct CUSTOMVERTEX
• FLOAT x, y, z, rhw // position for vertex
• DWORD color // The vertex color.
• define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHWD3DFVF_
  DIFFUSE)
• CUSTOMVERTEX vertices
• 150.0f, 50.0f, 0.5f, 1.0f, 0xffff0000, ,
  250.0f, 250.0f, 0.5f, 1.0f, 0xff00ff00, ,
  50.0f, 250.0f, 0.5f, 1.0f, 0xff00ffff, ,

22
3D programming
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• g_pd3dDevice-CreateVertexBuffer(
  3sizeof(CUSTOMVERTEX),0, D3DFVF_CUSTOMVERTEX,
  D3DPOOL_DEFAULT, g_pVB )
• VOID pVertices
• g_pVB-Lock( 0, sizeof(vertices),
  (void)pVertices, 0 )
• memcpy( pVertices,g_Vertices,sizeof(vertices))
• g_pVB-Unlock()
• g_pd3dDevice-SetStreamSource( 0, g_pVB, 0,
  sizeof(CUSTOMVERTEX) )
• g_pd3dDevice-SetFVF( D3DFVF_CUSTOMVERTEX )
• g_pd3dDevice-DrawPrimitive( D3DPT_TRIANGLELIST,
  0, 1 )

23
Assignment
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Deadline January 10th
• Exercises practice with all sorts of 3D
  techniques
• Employ one of them (matrices) to create some
  result
• Create a magnificent fireworks!
• Chocolate bar really great fireworks.

24
Last Assignments
Notes Contents Introduction Binocular
vision Recreation Computer representation Challeng
es 3D programming Assignment

• Received a total of 9 programs
• Questions go see me in my office
• Results 3 (well) done.
• Chocolate bar 3 Angelika Preissler AND Pieter
  Jordaan
• Result for assignment 4 none yet
• Chocolate bar 4 no results yet