TAILIEUCHUNG - Lecture Computer graphics: Lecture 13 - Fasih ur Rehman
This chapter discuss the purpose of the components required for successful communications; describe these uses of computer communications: wireless messaging services, wireless Internet access points, cybercafés, global positioning systems, collaboration, groupware, voice mail, and Web services; | Computer Graphics Lecture 13 Fasih ur Rehman Last Class Cross Product Plane Sphere Transformations Today’s Agenda Transformations Translation Example (Scaling) Find the transformed point, P’, subject to scaling P= (6, 2) through a vector v = (a, b) where i) a = b = 3; ii) a = 3, b = 4; iii) a = 1; b = -4 Example (Rotation) Find the transformed point, P’, caused by rotating P= (6, 2) about the origin through an angle of 90 Translation In translation all points in an object move to new position along the same straight-line path. The path is called translation vector or shift vector Example (Translation) Find the transformed point, P’, caused by translating P= (6, 2) through a vector v = (2, 4) Shear Reflection Special form of scaling Scaling by -1 Scaling Matrix a = -1, b = 1 a = 1, b = -1 a = -1, b = -1 Reflection Combining Transforms General transformation of a point: P' = N • P + A Scaling or rotation, Translate, we set A, and N is the multiplicative identity. Summary Translation .
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