+++ /dev/null
-/*
-** 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.
-*/
-
-/*
- * varray.c++
- *
- */
-
-//#include "glimports.h"
-//#include "myassert.h"
-//#include "mystdio.h"
-#include "varray.h"
-#include "arc.h"
-#include "simplemath.h" // glu_abs()
-
-#define TINY 0.0001
-inline long sgn( REAL x )
-{
- return (x < -TINY) ? -1 : ((x > TINY) ? 1 : 0 );
-}
-
-
-Varray::Varray( void )
-{
- int i;
-
- varray = 0;
- size = 0;
- numquads = 0;
-
- for (i = 0; i < 1000; i++) {
- vval[i] = 0;
- voffset[i] = 0;
- }
-}
-
-Varray::~Varray( void )
-{
- if( varray ) delete[] varray;
-}
-
-inline void
-Varray::update( Arc_ptr arc, long dir[2], REAL val )
-{
- register long ds = sgn(arc->tail()[0] - arc->prev->tail()[0]);
- register long dt = sgn(arc->tail()[1] - arc->prev->tail()[1]);
-
- if( dir[0] != ds || dir[1] != dt ) {
- dir[0] = ds;
- dir[1] = dt;
- append( val );
- }
-}
-
-void
-Varray::grow( long guess )
-{
- if( size < guess ) {
- size = guess * 2;
- if( varray ) delete[] varray;
- varray = new REAL[size];
- assert( varray != 0 );
- }
-}
-
-long
-Varray::init( REAL delta, Arc_ptr toparc, Arc_ptr botarc )
-{
- Arc_ptr left = toparc->next;
- Arc_ptr right = toparc;
- long ldir[2], rdir[2];
-
- ldir[0] = sgn( left->tail()[0] - left->prev->tail()[0] );
- ldir[1] = sgn( left->tail()[1] - left->prev->tail()[1] );
- rdir[0] = sgn( right->tail()[0] - right->prev->tail()[0] );
- rdir[1] = sgn( right->tail()[1] - right->prev->tail()[1] );
-
- vval[0] = toparc->tail()[1];
- numquads = 0;
-
- while( 1 ) {
- switch( sgn( left->tail()[1] - right->prev->tail()[1] ) ) {
- case 1:
- left = left->next;
- update( left, ldir, left->prev->tail()[1] );
- break;
- case -1:
- right = right->prev;
- update( right, rdir, right->tail()[1] );
- break;
- case 0:
- if( glu_abs(left->tail()[1] - botarc->tail()[1]) < TINY) goto end;
- if( glu_abs(left->tail()[0]-right->prev->tail()[0]) < TINY &&
- glu_abs(left->tail()[1]-right->prev->tail()[1]) < TINY) goto end;
- left = left->next;
- break;
- }
- }
-
-end:
- append( botarc->tail()[1] );
-
- grow( ((long) ((vval[0] - vval[numquads])/delta)) + numquads + 2 );
-
- long i, index = 0;
- for( i=0; i<numquads; i++ ) {
- voffset[i] = index;
- varray[index++] = vval[i];
- REAL dist = vval[i] - vval[i+1];
- if( dist > delta ) {
- long steps = ((long) (dist/delta)) +1;
- float deltav = - dist / (REAL) steps;
- for( long j=1; j<steps; j++ )
- varray[index++] = vval[i] + j * deltav;
- }
- }
- voffset[i] = index;
- varray[index] = vval[i];
- return index;
-}
-
projects / reactos.git / blobdiff