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Lecture Computer graphics - Chapter 1: Introduction Computer Graphics

This chapter presents the following content: Basic graphics system, grahpics areas, the programmer’s interface, object specification, raster graphics, display technologies, major applications,. | Introduction Computer Graphics 1 Computer Graphics Computer graphics deals with all aspects of creating images with a computer Hardware Software Applications 2 Basic Graphics System 3 Input devices Output device Image formed in Frame Buffer 3 Grahpics Areas 4 Modeling Rendering Animation User interaction Virtual reality Visualization Image processing 3D scanning Computational photography The Programmer’s Interface Programmer sees the graphics system through an interface: Application Programming Interface (API) 5 Object Specification Most APIs support a limited set of primitives including Points (1D object) Line segments (2D objects) Polygons (3D objects) Some curves and surfaces Quadrics Parametric polynomial All are defined through locations in space or vertices 6 Example glBegin(GL_POLYGON) glVertex3f(0.0, 0.0, 0.0); glVertex3f(0.0, 1.0, 0.0); glVertex3f(0.0, 0.0, 1.0); glEnd(); 7 type of object location of vertex end of object definition Modeling Package Digital Content Creation | Introduction Computer Graphics 1 Computer Graphics Computer graphics deals with all aspects of creating images with a computer Hardware Software Applications 2 Basic Graphics System 3 Input devices Output device Image formed in Frame Buffer 3 Grahpics Areas 4 Modeling Rendering Animation User interaction Virtual reality Visualization Image processing 3D scanning Computational photography The Programmer’s Interface Programmer sees the graphics system through an interface: Application Programming Interface (API) 5 Object Specification Most APIs support a limited set of primitives including Points (1D object) Line segments (2D objects) Polygons (3D objects) Some curves and surfaces Quadrics Parametric polynomial All are defined through locations in space or vertices 6 Example glBegin(GL_POLYGON) glVertex3f(0.0, 0.0, 0.0); glVertex3f(0.0, 1.0, 0.0); glVertex3f(0.0, 0.0, 1.0); glEnd(); 7 type of object location of vertex end of object definition Modeling Package Digital Content Creation 8 Raster Graphics Image produced as an array (the raster) of picture elements (pixels) in the frame buffer 9 Rasterization 10 Let talk about pixels Pixels are strored as a 1-dimensional array of ints Each in is formated arcording to Javas standard pixel model 11 Layout of the pixel array on the display Display Technologies 12 CRT LCD Head-Mounted Displays 13 Caves and Fish Bowls 14 Looking at NASA Space Station on display wall 15 http://www.cs.princeton.edu/~benshedd/CSDisplayWall8&24/index.html Evolution 16 Wire-Frame 17 Shutterbug: Copyright 1990 Pixar - Rendered by Thomas Williams and H. B. Siegel using Pixars RenderManTM Coloring 18 Shutterbug: Copyright 1990 Pixar - Rendered by Thomas Williams and H. B. Siegel using Pixars RenderManTM Hidden Surface Removal 19 Constant Rendering 20 Shutterbug: Copyright 1990 Pixar - Rendered by Thomas Williams and H. B. Siegel using Pixars RenderManTM Facet Shading 21 .