Ian O. Angell (auth.)'s A Practical Introduction to Computer Graphics PDF

By Ian O. Angell (auth.)

ISBN-10: 0333310837

ISBN-13: 9780333310830

ISBN-10: 1349165921

ISBN-13: 9781349165926

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Extra info for A Practical Introduction to Computer Graphics

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Hence the matrix to represent this transformation (remembering that we premultiply the column vector point by the matrix) is (~ o o o o 1 o o -TX) -Ty -Tz 1 and the routine for producing such a matrix is given by the sub routine TRAN.

C THE CClNSTANT ClF THE NEW PLANE IS ZERCl. 0 DCl 1 1=1,3 N (1,J) =P (1) N (2, I) =Q (I) N (3, I) =D (1) 1 CClNTINUE C B, THE BASE PClINT ClF THE LINE IS THE PClINT ClF INTERSECTIClN ClF C THE THREE PLANES. 6 In the routine to find the inverse of a matrix we had to calculate the determinant of the matrix, DET. The matrix in the last example is in a very special form, and so we recalculate DET DET =Pt (Ptq2 2 - P2qtq2 + Ptq/ - P3qtq3) +P2(P2q/ -P3q2q3 +P2qt 2 -ptQ2qd + P3(P3Qt 2 - PtQ3Qt + P3Q/ - P2Q3Q2) = Pt 2 (Q2 2 +Q/) + P2 2 (Q/ +Q:!

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A Practical Introduction to Computer Graphics by Ian O. Angell (auth.)

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