Computer Graphics Lecture 17 Fasih ur Rehman. Last Class 3D Transforms Inverse Rotation.

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Presentation transcript:

Computer Graphics Lecture 17 Fasih ur Rehman

Last Class 3D Transforms Inverse Rotation

Examples

Today’s Agenda Graphical Processes

Graphical Process High level graphical process

Implementation Tasks Four Major Tasks – Modeling – Geometry Processing – Rasterization – Frame Processing

Modeling The usual results of the modeling process are sets of vertices that specify a group of geometric objects supported by the rest of the system.

Geometry Processing Geometry processing means to determine which geometric objects can appear on the display and to assign shades or colors to the vertices of these objects. Four Tasks – Projection – Primitive assembly – Clipping – Shading Hidden surface removal and visible surface determination are required

Rasterization Calculation of pixel values based upon the previous steps i. e. Projection, Primitive assembly, Clipping and Shading The rasterizer starts with vertices in normalized device coordinates but outputs fragments whose locations are in units of the display—window coordinates. Viewport transformation

Summary Graphical Processes

References Fundamentals of Computer Graphics Third Edition by Peter Shirley and Steve Marschner Interactive Computer Graphics, A Top-down Approach with OpenGL (Sixth Edition) by Edward Angel.