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ongeo: Commit

Bezier曲線群を入力する下記関数のNurbs曲線入力対応
・最短点計算
・Tightバウンディングボックス

--- trunk/NurbsCurveBezierCache.cpp (nonexistent)

+++ trunk/NurbsCurveBezierCache.cpp (revision 55)

		@@ -0,0 +1,25 @@
	1	+// Copyright (C) Mocchi (mocchi_2003@yahoo.co.jp)
	2	+// License: Boost Software License See LICENSE.txt for the full license.
	3	+
	4	+#include "ONGEO.h"
	5	+
	6	+ONGEO_NurbsCurveBezierCache::ONGEO_NurbsCurveBezierCache(const ON_NurbsCurve &nc){
	7	+ if (nc.SpanCount() == 0) return;
	8	+
	9	+ int order = nc.Order();
	10	+ prms.Append(nc.Knot(order-2));
	11	+
	12	+ for (int j = 0; j <= nc.CVCount() - order; ++j){
	13	+ double prm_end = nc.Knot(j+order-1);
	14	+ if (*prms.Last() == prm_end) continue;
	15	+ prms.Append(prm_end);
	16	+
	17	+ ON_BezierCurve &bc = bcs.AppendNew();
	18	+ nc.ConvertSpanToBezier(j, bc);
	19	+ }
	20	+}
	21	+
	22	+double ONGEO_NurbsCurveBezierCache::GetNurbsParameterFromBezierParameter(int bezier_idx, double bezier_t) const{
	23	+ if (bezier_idx < 0 \|\| bezier_idx >= prms.Count() - 1) return ON_UNSET_VALUE;
	24	+ return ON_Interval(prms[bezier_idx], prms[bezier_idx+1]).ParameterAt(bezier_t);
	25	+}