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/inkscape/src/live_effects/
H A Dlpe-envelope.cpp152 Piecewise<SBasis> xbis = x; local
154 xbis *= -1.0;
155 xbis += boundingbox_X.extent();
158 /* This is important : y + ybis = constant and x +xbis = constant */
182 + xbis*(compose((uskeleton4),y4) + -x4*compose(n4,y4) );
192 Piecewise<SBasis> xsqr = x*xbis; /* xsqr = x * (BBox_X - x) */

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