mirror of
https://github.com/reactos/reactos.git
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844 lines
24 KiB
C++
844 lines
24 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* mapdesc.c++
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/mapdesc.cc,v 1.1 2004/02/02 16:39:11 navaraf Exp $
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*/
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#include <stdio.h>
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#include "glimports.h"
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#include "mystdio.h"
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#include "myassert.h"
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#include "mystring.h"
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#include "mymath.h"
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#include "backend.h"
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#include "nurbsconsts.h"
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#include "mapdesc.h"
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Mapdesc::Mapdesc( long _type, int _israt, int _ncoords, Backend& b )
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: backend( b )
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{
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type = _type;
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isrational = _israt;
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ncoords = _ncoords;
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hcoords = _ncoords + (_israt ? 0 : 1 );
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inhcoords = _ncoords - (_israt ? 1 : 0 );
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mask = ((1<<(inhcoords*2))-1);
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next = 0;
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assert( hcoords <= MAXCOORDS );
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assert( inhcoords >= 1 );
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pixel_tolerance = 1.0;
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error_tolerance = 1.0;
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bbox_subdividing = N_NOBBOXSUBDIVISION;
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culling_method = N_NOCULLING;
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sampling_method = N_NOSAMPLING;
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clampfactor = N_NOCLAMPING;
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minsavings = N_NOSAVINGSSUBDIVISION;
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s_steps = 0.0;
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t_steps = 0.0;
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maxrate = ( s_steps < 0.0 ) ? 0.0 : s_steps;
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maxsrate = ( s_steps < 0.0 ) ? 0.0 : s_steps;
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maxtrate = ( t_steps < 0.0 ) ? 0.0 : t_steps;
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identify( bmat );
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identify( cmat );
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identify( smat );
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for( int i = 0; i != inhcoords; i++ )
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bboxsize[i] = 1.0;
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}
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void
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Mapdesc::setBboxsize( INREAL *mat )
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{
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for( int i = 0; i != inhcoords; i++ )
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bboxsize[i] = (REAL) mat[i];
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}
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void
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Mapdesc::identify( REAL dest[MAXCOORDS][MAXCOORDS] )
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{
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memset( dest, 0, sizeof( dest ) );
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for( int i=0; i != hcoords; i++ )
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dest[i][i] = 1.0;
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}
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void
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Mapdesc::surfbbox( REAL bb[2][MAXCOORDS] )
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{
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backend.surfbbox( type, bb[0], bb[1] );
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}
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void
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Mapdesc::copy( REAL dest[MAXCOORDS][MAXCOORDS], long n, INREAL *src,
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long rstride, long cstride )
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{
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assert( n >= 0 );
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for( int i=0; i != n; i++ )
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for( int j=0; j != n; j++ )
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dest[i][j] = src[i*rstride + j*cstride];
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}
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/*--------------------------------------------------------------------------
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* copyPt - copy a homogeneous point
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*--------------------------------------------------------------------------
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*/
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void
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Mapdesc::copyPt( REAL *d, REAL *s )
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{
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assert( hcoords > 0 );
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switch( hcoords ) {
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case 4:
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d[3] = s[3];
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d[2] = s[2];
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d[1] = s[1];
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d[0] = s[0];
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break;
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case 3:
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d[2] = s[2];
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d[1] = s[1];
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d[0] = s[0];
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break;
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case 2:
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d[1] = s[1];
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d[0] = s[0];
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break;
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case 1:
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d[0] = s[0];
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break;
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case 5:
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d[4] = s[4];
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d[3] = s[3];
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d[2] = s[2];
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d[1] = s[1];
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d[0] = s[0];
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break;
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default:
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memcpy( d, s, hcoords * sizeof( REAL ) );
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break;
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}
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}
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/*--------------------------------------------------------------------------
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* sumPt - compute affine combination of two homogeneous points
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*--------------------------------------------------------------------------
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*/
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void
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Mapdesc::sumPt( REAL *dst, REAL *src1, REAL *src2, register REAL alpha, register REAL beta )
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{
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assert( hcoords > 0 );
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switch( hcoords ) {
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case 4:
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dst[3] = src1[3] * alpha + src2[3] * beta;
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dst[2] = src1[2] * alpha + src2[2] * beta;
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dst[1] = src1[1] * alpha + src2[1] * beta;
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dst[0] = src1[0] * alpha + src2[0] * beta;
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break;
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case 3:
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dst[2] = src1[2] * alpha + src2[2] * beta;
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dst[1] = src1[1] * alpha + src2[1] * beta;
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dst[0] = src1[0] * alpha + src2[0] * beta;
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break;
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case 2:
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dst[1] = src1[1] * alpha + src2[1] * beta;
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dst[0] = src1[0] * alpha + src2[0] * beta;
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break;
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case 1:
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dst[0] = src1[0] * alpha + src2[0] * beta;
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break;
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case 5:
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dst[4] = src1[4] * alpha + src2[4] * beta;
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dst[3] = src1[3] * alpha + src2[3] * beta;
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dst[2] = src1[2] * alpha + src2[2] * beta;
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dst[1] = src1[1] * alpha + src2[1] * beta;
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dst[0] = src1[0] * alpha + src2[0] * beta;
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break;
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default: {
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for( int i = 0; i != hcoords; i++ )
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dst[i] = src1[i] * alpha + src2[i] * beta;
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}
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break;
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}
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}
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/*--------------------------------------------------------------------------
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* clipbits - compute bit-vector indicating point/window position
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* of a (transformed) homogeneous point
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*--------------------------------------------------------------------------
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*/
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unsigned int
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Mapdesc::clipbits( REAL *p )
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{
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assert( inhcoords >= 0 );
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assert( inhcoords <= 3 );
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register int nc = inhcoords;
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register REAL pw = p[nc];
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register REAL nw = -pw;
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register unsigned int bits = 0;
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if( pw == 0.0 ) return mask;
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if( pw > 0.0 ) {
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switch( nc ) {
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case 3:
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if( p[2] <= pw ) bits |= (1<<5);
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if( p[2] >= nw ) bits |= (1<<4);
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if( p[1] <= pw ) bits |= (1<<3);
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if( p[1] >= nw ) bits |= (1<<2);
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if( p[0] <= pw ) bits |= (1<<1);
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if( p[0] >= nw ) bits |= (1<<0);
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return bits;
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case 2:
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if( p[1] <= pw ) bits |= (1<<3);
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if( p[1] >= nw ) bits |= (1<<2);
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if( p[0] <= pw ) bits |= (1<<1);
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if( p[0] >= nw ) bits |= (1<<0);
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return bits;
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case 1:
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if( p[0] <= pw ) bits |= (1<<1);
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if( p[0] >= nw ) bits |= (1<<0);
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return bits;
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default: {
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int bit = 1;
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for( int i=0; i<nc; i++ ) {
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if( p[i] >= nw ) bits |= bit;
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bit <<= 1;
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if( p[i] <= pw ) bits |= bit;
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bit <<= 1;
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}
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abort();
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break;
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}
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}
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} else {
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switch( nc ) {
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case 3:
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if( p[2] <= nw ) bits |= (1<<5);
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if( p[2] >= pw ) bits |= (1<<4);
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if( p[1] <= nw ) bits |= (1<<3);
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if( p[1] >= pw ) bits |= (1<<2);
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if( p[0] <= nw ) bits |= (1<<1);
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if( p[0] >= pw ) bits |= (1<<0);
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return bits;
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case 2:
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if( p[1] <= nw ) bits |= (1<<3);
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if( p[1] >= pw ) bits |= (1<<2);
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if( p[0] <= nw ) bits |= (1<<1);
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if( p[0] >= pw ) bits |= (1<<0);
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return bits;
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case 1:
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if( p[0] <= nw ) bits |= (1<<1);
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if( p[0] >= pw ) bits |= (1<<0);
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return bits;
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default: {
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int bit = 1;
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for( int i=0; i<nc; i++ ) {
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if( p[i] >= pw ) bits |= bit;
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bit <<= 1;
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if( p[i] <= nw ) bits |= bit;
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bit <<= 1;
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}
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abort();
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break;
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}
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}
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}
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return bits;
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}
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/*--------------------------------------------------------------------------
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* xformRational - transform a homogeneous point
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*--------------------------------------------------------------------------
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*/
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void
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Mapdesc::xformRational( Maxmatrix mat, REAL *d, REAL *s )
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{
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assert( hcoords >= 0 );
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if( hcoords == 3 ) {
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REAL x = s[0];
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REAL y = s[1];
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REAL z = s[2];
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d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0];
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d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1];
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d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2];
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} else if( hcoords == 4 ) {
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REAL x = s[0];
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REAL y = s[1];
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REAL z = s[2];
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REAL w = s[3];
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d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0]+w*mat[3][0];
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d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1]+w*mat[3][1];
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d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2]+w*mat[3][2];
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d[3] = x*mat[0][3]+y*mat[1][3]+z*mat[2][3]+w*mat[3][3];
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} else {
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for( int i=0; i != hcoords; i++ ) {
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d[i] = 0;
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for( int j = 0; j != hcoords; j++ )
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d[i] += s[j] * mat[j][i];
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}
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}
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}
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/*--------------------------------------------------------------------------
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* xformNonrational - transform a inhomogeneous point to a homogeneous point
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*--------------------------------------------------------------------------
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*/
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void
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Mapdesc::xformNonrational( Maxmatrix mat, REAL *d, REAL *s )
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{
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if( inhcoords == 2 ) {
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REAL x = s[0];
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REAL y = s[1];
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d[0] = x*mat[0][0]+y*mat[1][0]+mat[2][0];
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d[1] = x*mat[0][1]+y*mat[1][1]+mat[2][1];
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d[2] = x*mat[0][2]+y*mat[1][2]+mat[2][2];
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} else if( inhcoords == 3 ) {
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REAL x = s[0];
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REAL y = s[1];
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REAL z = s[2];
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d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0]+mat[3][0];
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d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1]+mat[3][1];
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d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2]+mat[3][2];
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d[3] = x*mat[0][3]+y*mat[1][3]+z*mat[2][3]+mat[3][3];
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} else {
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assert( inhcoords >= 0 );
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for( int i=0; i != hcoords; i++ ) {
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d[i] = mat[inhcoords][i];
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for( int j = 0; j < inhcoords; j++ )
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d[i] += s[j] * mat[j][i];
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}
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}
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}
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/*--------------------------------------------------------------------------
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* xformAndCullCheck - transform a set of points that may be EITHER
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* homogeneous or inhomogeneous depending on the map description and
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* check if they are either completely inside, completely outside,
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* or intersecting the viewing frustrum.
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*--------------------------------------------------------------------------
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*/
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int
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Mapdesc::xformAndCullCheck(
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REAL *pts, int uorder, int ustride, int vorder, int vstride )
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{
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assert( uorder > 0 );
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assert( vorder > 0 );
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unsigned int inbits = mask;
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unsigned int outbits = 0;
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REAL *p = pts;
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for( REAL *pend = p + uorder * ustride; p != pend; p += ustride ) {
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REAL *q = p;
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for( REAL *qend = q + vorder * vstride; q != qend; q += vstride ) {
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REAL cpts[MAXCOORDS];
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xformCulling( cpts, q );
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unsigned int bits = clipbits( cpts );
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outbits |= bits;
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inbits &= bits;
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if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
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}
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}
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if( outbits != (unsigned int)mask ) {
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return CULL_TRIVIAL_REJECT;
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} else if( inbits == (unsigned int)mask ) {
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return CULL_TRIVIAL_ACCEPT;
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} else {
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return CULL_ACCEPT;
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}
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}
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/*--------------------------------------------------------------------------
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* cullCheck - check if a set of homogeneous transformed points are
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* either completely inside, completely outside,
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* or intersecting the viewing frustrum.
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*--------------------------------------------------------------------------
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*/
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int
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Mapdesc::cullCheck( REAL *pts, int uorder, int ustride, int vorder, int vstride )
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{
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unsigned int inbits = mask;
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unsigned int outbits = 0;
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REAL *p = pts;
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for( REAL *pend = p + uorder * ustride; p != pend; p += ustride ) {
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REAL *q = p;
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for( REAL *qend = q + vorder * vstride; q != qend; q += vstride ) {
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unsigned int bits = clipbits( q );
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outbits |= bits;
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inbits &= bits;
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if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
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}
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}
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if( outbits != (unsigned int)mask ) {
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return CULL_TRIVIAL_REJECT;
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} else if( inbits == (unsigned int)mask ) {
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return CULL_TRIVIAL_ACCEPT;
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} else {
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return CULL_ACCEPT;
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}
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}
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/*--------------------------------------------------------------------------
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* cullCheck - check if a set of homogeneous transformed points are
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* either completely inside, completely outside,
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* or intersecting the viewing frustrum.
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*--------------------------------------------------------------------------
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*/
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int
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Mapdesc::cullCheck( REAL *pts, int order, int stride )
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{
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unsigned int inbits = mask;
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|
unsigned int outbits = 0;
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REAL *p = pts;
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for( REAL *pend = p + order * stride; p != pend; p += stride ) {
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|
unsigned int bits = clipbits( p );
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outbits |= bits;
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inbits &= bits;
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if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
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}
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if( outbits != (unsigned int)mask ) {
|
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return CULL_TRIVIAL_REJECT;
|
|
} else if( inbits == (unsigned int)mask ) {
|
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return CULL_TRIVIAL_ACCEPT;
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} else {
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return CULL_ACCEPT;
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}
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}
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/*--------------------------------------------------------------------------
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|
* xformSampling - transform a set of points that may be EITHER
|
|
* homogeneous or inhomogeneous depending on the map description
|
|
* into sampling space
|
|
*--------------------------------------------------------------------------
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|
*/
|
|
void
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Mapdesc::xformSampling( REAL *pts, int order, int stride, REAL *sp, int outstride )
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{
|
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xformMat( smat, pts, order, stride, sp, outstride );
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}
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|
|
void
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Mapdesc::xformBounding( REAL *pts, int order, int stride, REAL *sp, int outstride )
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{
|
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xformMat( bmat, pts, order, stride, sp, outstride );
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|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* xformCulling - transform a set of points that may be EITHER
|
|
* homogeneous or inhomogeneous depending on the map description
|
|
* into culling space
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Mapdesc::xformCulling( REAL *pts, int order, int stride, REAL *cp, int outstride )
|
|
{
|
|
xformMat( cmat, pts, order, stride, cp, outstride );
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* xformCulling - transform a set of points that may be EITHER
|
|
* homogeneous or inhomogeneous depending on the map description
|
|
* into culling space
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Mapdesc::xformCulling( REAL *pts,
|
|
int uorder, int ustride,
|
|
int vorder, int vstride,
|
|
REAL *cp, int outustride, int outvstride )
|
|
{
|
|
xformMat( cmat, pts, uorder, ustride, vorder, vstride, cp, outustride, outvstride );
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* xformSampling - transform a set of points that may be EITHER
|
|
* homogeneous or inhomogeneous depending on the map description
|
|
* into sampling space
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Mapdesc::xformSampling( REAL *pts,
|
|
int uorder, int ustride,
|
|
int vorder, int vstride,
|
|
REAL *sp, int outustride, int outvstride )
|
|
{
|
|
xformMat( smat, pts, uorder, ustride, vorder, vstride, sp, outustride, outvstride );
|
|
}
|
|
|
|
void
|
|
Mapdesc::xformBounding( REAL *pts,
|
|
int uorder, int ustride,
|
|
int vorder, int vstride,
|
|
REAL *sp, int outustride, int outvstride )
|
|
{
|
|
xformMat( bmat, pts, uorder, ustride, vorder, vstride, sp, outustride, outvstride );
|
|
}
|
|
|
|
void
|
|
Mapdesc::xformMat(
|
|
Maxmatrix mat,
|
|
REAL * pts,
|
|
int order,
|
|
int stride,
|
|
REAL * cp,
|
|
int outstride )
|
|
{
|
|
if( isrational ) {
|
|
REAL *pend = pts + order * stride;
|
|
for( REAL *p = pts ; p != pend; p += stride ) {
|
|
xformRational( mat, cp, p );
|
|
cp += outstride;
|
|
}
|
|
} else {
|
|
REAL *pend = pts + order * stride;
|
|
for( REAL *p = pts ; p != pend; p += stride ) {
|
|
xformNonrational( mat, cp, p );
|
|
cp += outstride;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
Mapdesc::xformMat( Maxmatrix mat, REAL *pts,
|
|
int uorder, int ustride,
|
|
int vorder, int vstride,
|
|
REAL *cp, int outustride, int outvstride )
|
|
{
|
|
if( isrational ) {
|
|
REAL *pend = pts + uorder * ustride;
|
|
for( REAL *p = pts ; p != pend; p += ustride ) {
|
|
REAL *cpts2 = cp;
|
|
REAL *qend = p + vorder * vstride;
|
|
for( REAL *q = p; q != qend; q += vstride ) {
|
|
xformRational( mat, cpts2, q );
|
|
cpts2 += outvstride;
|
|
}
|
|
cp += outustride;
|
|
}
|
|
} else {
|
|
REAL *pend = pts + uorder * ustride;
|
|
for( REAL *p = pts ; p != pend; p += ustride ) {
|
|
REAL *cpts2 = cp;
|
|
REAL *qend = p + vorder * vstride;
|
|
for( REAL *q = p; q != qend; q += vstride ) {
|
|
xformNonrational( mat, cpts2, q );
|
|
cpts2 += outvstride;
|
|
}
|
|
cp += outustride;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* subdivide - subdivide a curve along an isoparametric line
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
|
|
void
|
|
Mapdesc::subdivide( REAL *src, REAL *dst, REAL v, int stride, int order )
|
|
{
|
|
REAL mv = 1.0 - v;
|
|
|
|
for( REAL *send=src+stride*order; src!=send; send-=stride, dst+=stride ) {
|
|
copyPt( dst, src );
|
|
REAL *qpnt = src + stride;
|
|
for( REAL *qp=src; qpnt!=send; qp=qpnt, qpnt+=stride )
|
|
sumPt( qp, qp, qpnt, mv, v );
|
|
}
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* subdivide - subdivide a patch along an isoparametric line
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
|
|
void
|
|
Mapdesc::subdivide( REAL *src, REAL *dst, REAL v,
|
|
int so, int ss, int to, int ts )
|
|
{
|
|
REAL mv = 1.0 - v;
|
|
|
|
for( REAL *slast = src+ss*so; src != slast; src += ss, dst += ss ) {
|
|
REAL *sp = src;
|
|
REAL *dp = dst;
|
|
for( REAL *send = src+ts*to; sp != send; send -= ts, dp += ts ) {
|
|
copyPt( dp, sp );
|
|
REAL *qp = sp;
|
|
for( REAL *qpnt = sp+ts; qpnt != send; qp = qpnt, qpnt += ts )
|
|
sumPt( qp, qp, qpnt, mv, v );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#define sign(x) ((x > 0) ? 1 : ((x < 0.0) ? -1 : 0))
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* project - project a set of homogeneous coordinates into inhomogeneous ones
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
int
|
|
Mapdesc::project( REAL *src, int rstride, int cstride,
|
|
REAL *dest, int trstride, int tcstride,
|
|
int nrows, int ncols )
|
|
{
|
|
int s = sign( src[inhcoords] );
|
|
REAL *rlast = src + nrows * rstride;
|
|
REAL *trptr = dest;
|
|
for( REAL *rptr=src; rptr != rlast; rptr+=rstride, trptr+=trstride ) {
|
|
REAL *clast = rptr + ncols * cstride;
|
|
REAL *tcptr = trptr;
|
|
for( REAL *cptr = rptr; cptr != clast; cptr+=cstride, tcptr+=tcstride ) {
|
|
REAL *coordlast = cptr + inhcoords;
|
|
if( sign( *coordlast ) != s ) return 0;
|
|
REAL *tcoord = tcptr;
|
|
for( REAL *coord = cptr; coord != coordlast; coord++, tcoord++ ) {
|
|
*tcoord = *coord / *coordlast;
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* project - project a set of homogeneous coordinates into inhomogeneous ones
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
int
|
|
Mapdesc::project( REAL *src, int stride, REAL *dest, int tstride, int ncols )
|
|
{
|
|
int s = sign( src[inhcoords] );
|
|
|
|
REAL *clast = src + ncols * stride;
|
|
for( REAL *cptr = src, *tcptr = dest; cptr != clast; cptr+=stride, tcptr+=tstride ) {
|
|
REAL *coordlast = cptr + inhcoords;
|
|
if( sign( *coordlast ) != s ) return 0;
|
|
for( REAL *coord = cptr, *tcoord = tcptr; coord != coordlast; coord++, tcoord++ )
|
|
*tcoord = *coord / *coordlast;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
Mapdesc::bboxTooBig(
|
|
REAL *p,
|
|
int rstride,
|
|
int cstride,
|
|
int nrows,
|
|
int ncols,
|
|
REAL bb[2][MAXCOORDS] )
|
|
{
|
|
REAL bbpts[MAXORDER][MAXORDER][MAXCOORDS];
|
|
const int trstride = sizeof(bbpts[0]) / sizeof(REAL);
|
|
const int tcstride = sizeof(bbpts[0][0]) / sizeof(REAL);
|
|
|
|
// points have been transformed, therefore they are homogeneous
|
|
// project points
|
|
int val = project( p, rstride, cstride,
|
|
&bbpts[0][0][0], trstride, tcstride, nrows, ncols );
|
|
if( val == 0 ) return -1;
|
|
|
|
// compute bounding box
|
|
bbox( bb, &bbpts[0][0][0], trstride, tcstride, nrows, ncols );
|
|
|
|
// find out if bounding box can't fit in unit cube
|
|
if( bbox_subdividing == N_BBOXROUND ) {
|
|
for( int k=0; k != inhcoords; k++ )
|
|
if( ceilf(bb[1][k]) - floorf(bb[0][k]) > bboxsize[k] ) return 1;
|
|
} else {
|
|
for( int k=0; k != inhcoords; k++ )
|
|
if( bb[1][k] - bb[0][k] > bboxsize[k] ) return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
Mapdesc::bbox(
|
|
REAL bb[2][MAXCOORDS],
|
|
REAL *p,
|
|
int rstride,
|
|
int cstride,
|
|
int nrows,
|
|
int ncols )
|
|
{
|
|
int k;
|
|
for( k=0; k != inhcoords; k++ )
|
|
bb[0][k] = bb[1][k] = p[k];
|
|
|
|
for( int i=0; i != nrows; i++ )
|
|
for( int j=0; j != ncols; j++ )
|
|
for( k=0; k != inhcoords; k++ ) {
|
|
REAL x = p[i*rstride + j*cstride + k];
|
|
if( x < bb[0][k] ) bb[0][k] = x;
|
|
else if( x > bb[1][k] ) bb[1][k] = x;
|
|
}
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* calcVelocityRational - calculate upper bound on first partial derivative
|
|
* of a homogeneous set of points and bounds on each row of points.
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
REAL
|
|
Mapdesc::calcVelocityRational( REAL *p, int stride, int ncols )
|
|
{
|
|
REAL tmp[MAXORDER][MAXCOORDS];
|
|
|
|
assert( ncols <= MAXORDER );
|
|
|
|
const int tstride = sizeof(tmp[0]) / sizeof(REAL);
|
|
|
|
if( project( p, stride, &tmp[0][0], tstride, ncols ) ) {
|
|
return calcPartialVelocity( &tmp[0][0], tstride, ncols, 1, 1.0 );
|
|
} else { /* XXX */
|
|
return calcPartialVelocity( &tmp[0][0], tstride, ncols, 1, 1.0 );
|
|
}
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------
|
|
* calcVelocityNonrational - calculate upper bound on first partial
|
|
* derivative of a inhomogeneous set of points.
|
|
*--------------------------------------------------------------------------
|
|
*/
|
|
REAL
|
|
Mapdesc::calcVelocityNonrational( REAL *pts, int stride, int ncols )
|
|
{
|
|
return calcPartialVelocity( pts, stride, ncols, 1, 1.0 );
|
|
}
|
|
|
|
int
|
|
Mapdesc::isProperty( long property )
|
|
{
|
|
switch ( property ) {
|
|
case N_PIXEL_TOLERANCE:
|
|
case N_ERROR_TOLERANCE:
|
|
case N_CULLING:
|
|
case N_BBOX_SUBDIVIDING:
|
|
case N_S_STEPS:
|
|
case N_T_STEPS:
|
|
case N_SAMPLINGMETHOD:
|
|
case N_CLAMPFACTOR:
|
|
case N_MINSAVINGS:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
REAL
|
|
Mapdesc::getProperty( long property )
|
|
{
|
|
switch ( property ) {
|
|
case N_PIXEL_TOLERANCE:
|
|
return pixel_tolerance;
|
|
case N_ERROR_TOLERANCE:
|
|
return error_tolerance;
|
|
case N_CULLING:
|
|
return culling_method;
|
|
case N_BBOX_SUBDIVIDING:
|
|
return bbox_subdividing;
|
|
case N_S_STEPS:
|
|
return s_steps;
|
|
case N_T_STEPS:
|
|
return t_steps;
|
|
case N_SAMPLINGMETHOD:
|
|
return sampling_method;
|
|
case N_CLAMPFACTOR:
|
|
return clampfactor;
|
|
case N_MINSAVINGS:
|
|
return minsavings;
|
|
default:
|
|
abort();
|
|
return -1; //not necessary, needed to shut up compiler
|
|
}
|
|
}
|
|
|
|
void
|
|
Mapdesc::setProperty( long property, REAL value )
|
|
{
|
|
|
|
switch ( property ) {
|
|
case N_PIXEL_TOLERANCE:
|
|
pixel_tolerance = value;
|
|
break;
|
|
case N_ERROR_TOLERANCE:
|
|
error_tolerance = value;
|
|
break;
|
|
case N_CULLING:
|
|
culling_method = value;
|
|
break;
|
|
case N_BBOX_SUBDIVIDING:
|
|
if( value <= 0.0 ) value = N_NOBBOXSUBDIVISION;
|
|
bbox_subdividing = value;
|
|
break;
|
|
case N_S_STEPS:
|
|
if( value < 0.0 ) value = 0.0;
|
|
s_steps = value;
|
|
maxrate = ( value < 0.0 ) ? 0.0 : value;
|
|
maxsrate = ( value < 0.0 ) ? 0.0 : value;
|
|
break;
|
|
case N_T_STEPS:
|
|
if( value < 0.0 ) value = 0.0;
|
|
t_steps = value;
|
|
maxtrate = ( value < 0.0 ) ? 0.0 : value;
|
|
break;
|
|
case N_SAMPLINGMETHOD:
|
|
sampling_method = value;
|
|
break;
|
|
case N_CLAMPFACTOR:
|
|
if( value <= 0.0 ) value = N_NOCLAMPING;
|
|
clampfactor = value;
|
|
break;
|
|
case N_MINSAVINGS:
|
|
if( value <= 0.0 ) value = N_NOSAVINGSSUBDIVISION;
|
|
minsavings = value;
|
|
break;
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
}
|
|
|