mirror of
https://github.com/reactos/reactos.git
synced 2025-01-12 09:07:54 +00:00
148 lines
4.6 KiB
C++
148 lines
4.6 KiB
C++
/*
|
|
** 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.
|
|
*/
|
|
|
|
/*
|
|
* reader.c++
|
|
*
|
|
* $Date$ $Revision: 1.1 $
|
|
* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/reader.cc,v 1.1 2004/02/02 16:39:12 navaraf Exp $
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "glimports.h"
|
|
#include "nurbsconsts.h"
|
|
#include "reader.h"
|
|
#include "trimvertex.h"
|
|
#include "simplemath.h"
|
|
|
|
//when read a pwlCurve, if two consecutive points are the same, then
|
|
//eliminate one of them. This makes the tessellator more robust. The spec
|
|
//assumes the application makes sure there are no redundant points.
|
|
//but in Inspector, the trim curves seem to have redundant points a lot.
|
|
//I guess other similar users may have the same problem.
|
|
|
|
#define ELIMINATE_REDUNDANT_POINTS
|
|
|
|
#ifdef ELIMINATE_REDUNDANT_POINTS
|
|
#define equal(x,y) ( glu_abs(x-y) <= 0.00001)
|
|
#endif
|
|
|
|
#ifdef ELIMINATE_REDUNDANT_POINTS
|
|
O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
|
|
{
|
|
next = 0;
|
|
used = 0;
|
|
owner = 0;
|
|
pts = trimpts;
|
|
npts = (int) count;
|
|
int i;
|
|
|
|
/* copy user data into internal trimming data structures */
|
|
switch( _type ) {
|
|
case N_P2D: {
|
|
TrimVertex *v = pts;
|
|
TrimVertex *prev = NULL;
|
|
int num = 0;
|
|
int doit;
|
|
for(i=0; i<count; i++) {
|
|
doit = 1;
|
|
if(prev != NULL)
|
|
{
|
|
if(equal(prev->param[0], array[0]) && equal(prev->param[1], array[1]))
|
|
{
|
|
doit = 0;
|
|
}
|
|
}
|
|
|
|
if(doit)
|
|
{
|
|
v->param[0] = (REAL) array[0];
|
|
v->param[1] = (REAL) array[1];
|
|
prev = v;
|
|
v++;
|
|
num++;
|
|
}
|
|
array = (INREAL *) (((char *) array) + byte_stride);
|
|
}
|
|
npts = num;
|
|
break;
|
|
}
|
|
case N_P2DR: {
|
|
TrimVertex *v = pts;
|
|
for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
|
|
v->param[0] = (REAL) array[0] / (REAL) array[2];
|
|
v->param[1] = (REAL) array[1] / (REAL) array[2];
|
|
array = (INREAL *) (((char *) array) + byte_stride);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
|
|
{
|
|
next = 0;
|
|
used = 0;
|
|
owner = 0;
|
|
pts = trimpts;
|
|
npts = (int) count;
|
|
|
|
/* copy user data into internal trimming data structures */
|
|
switch( _type ) {
|
|
case N_P2D: {
|
|
TrimVertex *v = pts;
|
|
for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
|
|
v->param[0] = (REAL) array[0];
|
|
v->param[1] = (REAL) array[1];
|
|
array = (INREAL *) (((char *) array) + byte_stride);
|
|
}
|
|
break;
|
|
}
|
|
case N_P2DR: {
|
|
TrimVertex *v = pts;
|
|
for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
|
|
v->param[0] = (REAL) array[0] / (REAL) array[2];
|
|
v->param[1] = (REAL) array[1] / (REAL) array[2];
|
|
array = (INREAL *) (((char *) array) + byte_stride);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|