[GLU32]

[reactos.git] / reactos / dll / opengl / glu32 / src / libnurbs / internals / jarcloc.h

diff --git a/reactos/dll/opengl/glu32/src/libnurbs/internals/jarcloc.h b/reactos/dll/opengl/glu32/src/libnurbs/internals/jarcloc.h
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+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+/*
+ * jarcloc.h
+ *
+ */
+
+#ifndef __glujarcloc_h_
+#define __glujarcloc_h_
+
+#include "arc.h"
+
+class Jarcloc {
+private:
+    Arc_ptr            arc;
+    TrimVertex         *p;
+    TrimVertex         *plast;
+public:
+    inline void                init( Arc_ptr a, long first, long last ) { arc = a; p=&a->pwlArc->pts[first]; plast = &a->pwlArc->pts[last]; }
+    inline TrimVertex *        getnextpt( void );
+    inline TrimVertex *        getprevpt( void );
+    inline void                reverse();
+};
+
+inline void
+Jarcloc::reverse()
+{
+    if( plast == &arc->pwlArc->pts[0] )
+       plast =  &arc->pwlArc->pts[arc->pwlArc->npts - 1];
+    else
+       plast =  &arc->pwlArc->pts[0];
+}
+
+inline TrimVertex *
+Jarcloc::getnextpt()
+{
+    assert( p <= plast );
+    if( p == plast ) {
+       arc = arc->next;
+       p = &arc->pwlArc->pts[0];
+       plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
+       assert( p < plast );
+    }
+    return p++;
+}
+       
+inline TrimVertex *
+Jarcloc::getprevpt()
+{
+    assert( p >= plast );
+    if( p == plast ) {
+       arc = arc->prev;
+       p = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
+       plast = &arc->pwlArc->pts[0];
+       assert( p > plast );
+    }
+    return p--;
+}
+#endif /* __glujarcloc_h_ */