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Graphics Interchange Format  |  1997-10-25  |  35KB  |  453x249  |  4-bit (16 colors)
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OCR: "(t) = TeM.P where 0 <te 1 3 2 T=[t. t. t, 1] -1/6 1/2 - 1/2 1/6 -1/2 1 -1/2 0 M == 1/2 -1 0 2/3 Mc= 3/2 -5/2 0 1 -1/2 1/2 1/2 1/6 3/2 2 1/2 0 1/6 0 0 0 1/2 -1/2 0 0 X1 Y1 P = X2 Y2 X3 Y3 X4 Y4 1 Figure 2: Choose M - M ., for BSpline, M . M. for the Catmull-Rom spline. P is the "geometry" matrix holding the four control points.