Basic Graphics Programming - University of Southern California

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<strong>Graphics</strong> library (API) • Intermediary between applica>ons and graphics hardware • Other popular APIs: Direct3D (MicrosoU) OpenGL ES (embedded devices) X3D (successor <strong>of</strong> VRML) 4
OpenGL is cross-platform • Same code works with liYle/no modifica>ons • Implementa>ons: Windows, Mac, Linux: ships with the OS Linux: Mesa, a freeware implementa>on. 5
Page 1 and 2: CSCI 480 Computer Graphics Lecture
Page 3: Where is OpenGL used • CAD • Vi
Page 7 and 8: How does OpenGL work (continued) 3.
Page 9 and 10: OpenGL is a state machine State var
Page 11 and 12: Graphics Pipeline Primitives+ mater
Page 13 and 14: The pipeline is implemented by Open
Page 15 and 16: Vertices • Vertices in world coor
Page 17 and 18: Clipper • Mostly automatic (must
Page 19 and 20: Rasterizer • Interesting algorith
Page 21 and 22: Example: Draw Square Outline • Ty
Page 23 and 24: Polygons • Polygons enclose an ar
Page 25 and 26: Why Polygon Restrictions? • Non-c
Page 27 and 28: Attributes: color, shading and refl
Page 29 and 30: Color Filters • Eye can perceive
Page 31 and 32: RGB vs HSV Gimp Color Picker R B G
Page 33 and 34: GLUT Callbacks • Window system in
Page 35 and 36: The Display Callback • The routin
Page 37 and 38: The Image glShadeModel(GL_FLAT) glS
Page 39 and 40: Projection • Mapping world to scr
Page 41 and 42: Viewport • Determines clipping in

Basic Graphics Programming - University of Southern California

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