An Interactive Introduction to OpenGL Programming

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Alpha: the 4 th Color Component • Measure of Opacity – simulate translucent objects • glass, water, etc. – composite images – antialiasing – ignored if blending is not enabled glEnable( GL_BLEND )
Blending • Combine fragments with pixel values that are already in the framebuffer glBlendFunc( src, dst ) v C r v = src C f + dst v C p Fragment (src) Framebuffer Pixel (dst) Blending Equation Blended Pixel
Page 1 and 2:
An Interactive Introduction to Open
Page 3 and 4:
Welcome • Today’s Goals and Age
Page 5 and 6:
Related APIs • GLU (OpenGL Utilit
Page 7 and 8:
What Is Required For Your Programs
Page 9 and 10:
The OpenGL Pipeline Vertex Processi
Page 11 and 12:
Sequence of Most OpenGL Programs Co
Page 13 and 14:
An OpenGL Program (cont’d.) void
Page 15 and 16:
GLUT Callback Functions • Routine
Page 17 and 18:
What can OpenGL Draw? • Geometric
Page 19 and 20:
Specifying Geometric Primitives •
Page 21 and 22:
How OpenGL Works: The Conceptual Mo
Page 23 and 24:
Setting OpenGL State • Three ways
Page 25 and 26:
OpenGL and Color • The OpenGL Col
Page 27 and 28:
Animation and Depth Buffering
Page 29 and 30:
Animation Using Double Buffering 1.
Page 31 and 32:
Depth Buffering Using OpenGL 1. Req
Page 33 and 34:
Camera Analogy • 3D is just like
Page 35 and 36:
Transformation Pipeline v e r t e x
Page 37 and 38:
Homogeneous Coordinates - each vert
Page 39 and 40:
Specifying Transformations • Prog
Page 41 and 42: Matrix Operations • Specify Curre
Page 43 and 44: Applying Projection Transformations
Page 45 and 46: Projection Tutorial
Page 47 and 48: Transformation Tutorial
Page 49 and 50: Common Transformation Usage • 2 e
Page 51 and 52: Example 2: Ortho void resize( int w
Page 53 and 54: Compositing Modeling Transformation
Page 55 and 56: Lighting
Page 57 and 58: How OpenGL Simulates Lights • Pho
Page 59 and 60: Material Properties • Define the
Page 61 and 62: Light Sources (cont'd.) • Light c
Page 63 and 64: Turning on the Lights • Flip each
Page 65 and 66: Controlling a Light’s Position
Page 67 and 68: Tips for Better Lighting • Recall
Page 69 and 70: Pixel-based primitives • Bitmaps
Page 71 and 72: Rendering Bitmaps and Images • Op
Page 73 and 74: Pixel Pipeline • Programmable pix
Page 75 and 76: Texture Example • The texture (be
Page 77 and 78: Texture Objects • Have OpenGL sto
Page 79 and 80: Specify the Texture Image • Defin
Page 81 and 82: Mapping a Texture • Based on para
Page 83 and 84: Applying Textures II - specify text
Page 85 and 86: Filter Modes Example: glTexParamete
Page 87 and 88: Wrapping Mode • Example: glTexPar
Page 89 and 90: Perspective Correction Hint • Tex
Page 91: Working with OpenGL Extensions •
Page 95 and 96: Summary / Q & A
Page 97: Books • OpenGL Programming Guide,
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An Interactive Introduction to OpenGL Programming

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