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/*
* Copyright 2003 Sandia Corporation.
* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
* license for use of this work by or on behalf of the
* U.S. Government. Redistribution and use in source and binary forms, with
* or without modification, are permitted provided that this Notice and any
* statement of authorship are reproduced on all copies.
*/
#include "vtkEdgeSubdivisionCriterion.h"
#include "vtkStreamingTessellator.h"
#include "vtkDataSetAttributes.h"
#include "vtkMatrix4x4.h"
void vtkEdgeSubdivisionCriterion::PrintSelf( ostream& os, vtkIndent indent )
{
this->Superclass::PrintSelf( os, indent );
}
vtkEdgeSubdivisionCriterion::vtkEdgeSubdivisionCriterion()
{
this->FieldIds = new int [ vtkStreamingTessellator::MaxFieldSize ];
this->FieldOffsets = new int [ vtkStreamingTessellator::MaxFieldSize + 1 ];
this->FieldOffsets[0] = 0;
this->NumberOfFields = 0;
}
vtkEdgeSubdivisionCriterion::~vtkEdgeSubdivisionCriterion()
{
delete[] this->FieldIds;
delete[] this->FieldOffsets;
};
void vtkEdgeSubdivisionCriterion::ResetFieldList()
{
this->NumberOfFields = 0;
}
int vtkEdgeSubdivisionCriterion::PassField( int sourceId, int sourceSize, vtkStreamingTessellator* t )
{
if ( sourceSize + this->FieldOffsets[ this->NumberOfFields ] > vtkStreamingTessellator::MaxFieldSize )
{
vtkErrorMacro( "PassField source size (" << sourceSize << ") was too large for vtkStreamingTessellator" );
}
int off = this->GetOutputField( sourceId );
if ( off == -1 )
{
this->FieldIds[ this->NumberOfFields ] = sourceId;
off = this->FieldOffsets[ this->NumberOfFields ];
t->SetFieldSize( -1, this->FieldOffsets[ ++this->NumberOfFields ] = off + sourceSize );
this->Modified();
}
else
{
off = this->FieldOffsets[ off ];
vtkWarningMacro( "Field " << sourceId << " is already being passed as offset " << off << "." );
}
return off;
}
bool vtkEdgeSubdivisionCriterion::DontPassField( int sourceId, vtkStreamingTessellator* t )
{
int id = this->GetOutputField( sourceId );
if ( id == -1 )
return false;
int sz = this->FieldOffsets[id+1] - this->FieldOffsets[id];
for ( int i=id+1; i<this->GetNumberOfFields(); ++i )
{
this->FieldIds[i-1] = this->FieldIds[i];
this->FieldOffsets[i] = this->FieldOffsets[i+1] - sz;
}
t->SetFieldSize( -1, this->FieldOffsets[ this->GetNumberOfFields() ] );
this->Modified();
return true;
}
int vtkEdgeSubdivisionCriterion::GetOutputField( int sourceId ) const
{
for ( int i=0; i<this->NumberOfFields; ++i )
if ( this->FieldIds[i] == sourceId )
return i;
return -1;
}
bool vtkEdgeSubdivisionCriterion::ViewDependentEval(
const double* p0, double* p1, double* real_p1,
const double* p2, int ,
vtkMatrix4x4* Transform, const double* PixelSize,
double AllowableChordError ) const
{
double real_p1t[4];
double intr_p1t[4];
Transform->MultiplyPoint( real_p1, real_p1t );
Transform->MultiplyPoint( p1, intr_p1t );
double eprod = fabs(AllowableChordError*real_p1t[3]*intr_p1t[3]);
/*
fprintf( stderr, "eprod=%g, compare to <%g,%g>\n", eprod,
fabs(real_p1t[0]*intr_p1t[3]-intr_p1t[0]*real_p1t[3])/PixelSize[0],
fabs(real_p1t[1]*intr_p1t[3]-intr_p1t[1]*real_p1t[3])/PixelSize[1] );
*/
if ( (real_p1t[0] > real_p1t[3]) || (real_p1t[0] < -real_p1t[3]) ||
(real_p1t[1] > real_p1t[3]) || (real_p1t[1] < -real_p1t[3]) ) {
double p0t[4];
double p2t[4];
for (int i=0; i<3; i++) {
p0t[i] = p0[i];
p2t[i] = p2[i];
}
p0t[3] = p2t[3] = 1.;
Transform->MultiplyPoint( p0t, p0t );
Transform->MultiplyPoint( p2t, p2t );
int p0Code=0, p2Code=0;
#define ENDPOINT_CODE(code,pt) \
if ( pt[0] > pt[3] ) \
code += 1; \
else if ( pt[0] < -pt[3] ) \
code += 2; \
if ( pt[1] > pt[3] ) \
code += 4; \
else if ( pt[1] < -pt[3] ) \
code += 8;
ENDPOINT_CODE(p0Code,p0t);
ENDPOINT_CODE(p2Code,p2t);
if ( p0Code & p2Code ) {
return false ;
}
}
if ( fabs(real_p1t[0]*intr_p1t[3]-intr_p1t[0]*real_p1t[3])/PixelSize[0] > eprod ||
fabs(real_p1t[1]*intr_p1t[3]-intr_p1t[1]*real_p1t[3])/PixelSize[1] > eprod ) {
// copy the properly interpolated point into the result
for ( int c=0; c<3; ++c )
p1[c] = real_p1[c];
return true ; // need to subdivide
}
return false ; // no need to subdivide
}
bool vtkEdgeSubdivisionCriterion::FixedFieldErrorEval( const double*, double* p1, double* real_pf, const double*, int field_start, int criteria, double* AllowableL2Error2 ) const
{
int id = 0;
double mag;
while ( criteria )
{
if ( ! (criteria & 1) )
{
criteria >>= 1;
++id;
continue;
}
mag = 0.;
int fsz = this->FieldOffsets[id+1] - this->FieldOffsets[id];
for ( int c=0; c<fsz; ++c )
{
double tmp = real_pf[c+field_start] - p1[c+field_start];
mag += tmp*tmp;
}
if ( mag > AllowableL2Error2[id] )
{
return true;
}
criteria >>= 1;
++id;
}
return false;
}
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