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/*
* Smithsonian Astrophysical Observatory, Cambridge, MA, USA
* This code has been modified under the terms listed below and is made
* available under the same terms.
*/
/*
* Copyright 1993-2004 George A Howlett.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "bltGrElem.h"
#include "bltGrElemOp.h"
#include "bltGrPenOp.h"
PenStyle** Blt_StyleMap(Element* elemPtr)
{
ElementOptions* ops = (ElementOptions*)elemPtr->ops;
int nPoints = NUMBEROFPOINTS(ops);
int nWeights = MIN(ops->w ? ops->w->nValues : 0, nPoints);
double* w = ops->w ? ops->w->values : NULL;
Blt_ChainLink link = Blt_Chain_FirstLink(ops->stylePalette);
PenStyle *stylePtr = (PenStyle*)Blt_Chain_GetValue(link);
// Create a style mapping array (data point index to style),
// initialized to the default style.
PenStyle **dataToStyle = (PenStyle**)malloc(nPoints * sizeof(PenStyle *));
for (int ii=0; ii<nPoints; ii++)
dataToStyle[ii] = stylePtr;
for (int ii=0; ii<nWeights; ii++) {
for (link = Blt_Chain_LastLink(ops->stylePalette); link != NULL;
link = Blt_Chain_PrevLink(link)) {
stylePtr = (PenStyle*)Blt_Chain_GetValue(link);
if (stylePtr->weight.range > 0.0) {
double norm;
norm = (w[ii] - stylePtr->weight.min) / stylePtr->weight.range;
if (((norm - 1.0) <= DBL_EPSILON) &&
(((1.0 - norm) - 1.0) <= DBL_EPSILON)) {
dataToStyle[ii] = stylePtr;
break;
}
}
}
}
return dataToStyle;
}
void Blt_FreeStylePalette(Blt_Chain stylePalette)
{
// Skip the first slot. It contains the built-in "normal" pen of the element
Blt_ChainLink link = Blt_Chain_FirstLink(stylePalette);
if (link) {
Blt_ChainLink next;
for (link = Blt_Chain_NextLink(link); link != NULL; link = next) {
next = Blt_Chain_NextLink(link);
PenStyle *stylePtr = (PenStyle*)Blt_Chain_GetValue(link);
Blt_FreePen(stylePtr->penPtr);
Blt_Chain_DeleteLink(stylePalette, link);
}
}
}
double Blt_FindElemValuesMinimum(ElemValues* valuesPtr, double minLimit)
{
double min = DBL_MAX;
if (!valuesPtr)
return min;
for (int ii=0; ii<valuesPtr->nValues; ii++) {
double x = valuesPtr->values[ii];
// What do you do about negative values when using log
// scale values seems like a grey area. Mirror.
if (x < 0.0)
x = -x;
if ((x > minLimit) && (min > x))
min = x;
}
if (min == DBL_MAX)
min = minLimit;
return min;
}
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