[GLU32]

[reactos.git] / reactos / dll / opengl / glu32 / src / libnurbs / internals / curvelist.cc

diff --git a/reactos/dll/opengl/glu32/src/libnurbs/internals/curvelist.cc b/reactos/dll/opengl/glu32/src/libnurbs/internals/curvelist.cc
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+++ b/reactos/dll/opengl/glu32/src/libnurbs/internals/curvelist.cc
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+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+*/
+
+/*
+ * curvelist.c++
+ *
+ */
+
+#include "glimports.h"
+#include "myassert.h"
+#include "mystdio.h"
+#include "quilt.h"
+#include "curvelist.h"
+#include "curve.h"
+#include "types.h"
+
+Curvelist::Curvelist( Quilt *quilts, REAL pta, REAL ptb )
+{
+    curve = 0;
+    for( Quilt *q = quilts; q; q = q->next ) 
+       curve = new Curve( q, pta, ptb, curve );
+    range[0] = pta;
+    range[1] = ptb;
+    range[2] = ptb - pta;
+    needsSubdivision = 0;
+    stepsize = 0;
+}
+
+Curvelist::Curvelist( Curvelist &upper, REAL value )
+{
+    curve = 0;
+    for( Curve *c = upper.curve; c; c = c->next )
+       curve = new Curve( *c, value, curve );
+
+    range[0] = upper.range[0];
+    range[1] = value;
+    range[2] = value - upper.range[0];
+    upper.range[0] = value;
+    upper.range[2] = upper.range[1] - value;
+    needsSubdivision = 0;
+    stepsize = 0;
+}
+
+Curvelist::~Curvelist()
+{
+    while( curve ) {
+       Curve *c = curve;
+       curve = curve->next;
+       delete c;
+    }
+}
+
+int
+Curvelist::cullCheck( void )
+{
+    for( Curve *c = curve; c; c = c->next )
+       if( c->cullCheck() == CULL_TRIVIAL_REJECT )
+           return CULL_TRIVIAL_REJECT;
+    return CULL_ACCEPT;
+}
+
+void
+Curvelist::getstepsize( void )
+{
+    stepsize = range[2];
+    Curve *c;
+    for( c = curve; c; c = c->next ) {
+       c->getstepsize();
+       c->clamp();
+       stepsize =  ((c->stepsize < stepsize) ? c->stepsize : stepsize);
+       if( c->needsSamplingSubdivision() ) break;
+    }
+    needsSubdivision = ( c ) ? 1 : 0;
+}
+
+int
+Curvelist::needsSamplingSubdivision( void )
+{
+    return needsSubdivision;
+}
+