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#include "Main.h"
#include <stdio.h>
#include <math.h>
#include "Defines.h"
#include "Dimensions.h"
#include "HpFile.h"
#include "Shade.h"
#include "Utilities.h"
/* own stuff */
#include "Curves.h"
static floatish *x; /* x and y values */
static floatish *y;
static floatish *py; /* previous y values */
static void Curve PROTO((struct entry *)); /* forward */
static void ShadeCurve
PROTO((floatish *x, floatish *y, floatish *py, floatish shade));
void
Curves()
{
intish i;
for (i = 0; i < nidents; i++) {
Curve(identtable[i]);
}
}
/*
* Draw a curve, and fill the area that is below it and above
* the previous curve.
*/
static void
Curve(e)
struct entry* e;
{
struct chunk* ch;
int j;
for (ch = e->chk; ch; ch = ch->next) {
for (j = 0; j < ch->nd; j++) {
y[ ch->d[j].bucket ] += ch->d[j].value;
}
}
ShadeCurve(x, y, py, ShadeOf(e->name));
}
static void PlotCurveLeftToRight PROTO((floatish *, floatish *)); /* forward */
static void PlotCurveRightToLeft PROTO((floatish *, floatish *)); /* forward */
static void SaveCurve PROTO((floatish *, floatish *)); /* forward */
/*
* Map virtual x coord to physical x coord
*/
floatish
xpage(x)
floatish x;
{
return (x + graphx0);
}
/*
* Map virtual y coord to physical y coord
*/
floatish
ypage(y)
floatish y;
{
return (y + graphy0);
}
/*
* Fill the region bounded by two splines, using the given
* shade.
*/
static void
ShadeCurve(x, y, py, shade)
floatish *x; floatish *y; floatish *py; floatish shade;
{
fprintf(psfp, "%f %f moveto\n", xpage(x[0]), ypage(py[0]));
PlotCurveLeftToRight(x, py);
fprintf(psfp, "%f %f lineto\n", xpage(x[nsamples - 1]),
ypage(y[nsamples - 1]));
PlotCurveRightToLeft(x, y);
fprintf(psfp, "closepath\n");
fprintf(psfp, "gsave\n");
SetPSColour(shade);
fprintf(psfp, "fill\n");
fprintf(psfp, "grestore\n");
fprintf(psfp, "stroke\n");
SaveCurve(y, py);
}
static void
PlotCurveLeftToRight(x,y)
floatish *x; floatish *y;
{
intish i;
for (i = 0; i < nsamples; i++) {
fprintf(psfp, "%f %f lineto\n", xpage(x[i]), ypage(y[i]));
}
}
static void
PlotCurveRightToLeft(x,y)
floatish *x; floatish *y;
{
intish i;
for (i = nsamples - 1; i >= 0; i-- ) {
fprintf(psfp, "%f %f lineto\n", xpage(x[i]), ypage(y[i]));
}
}
/*
* Save the curve coordinates stored in y[] in py[].
*/
static void
SaveCurve(y, py)
floatish *y; floatish* py;
{
intish i;
for (i = 0; i < nsamples; i++) {
py[i] = y[i];
}
}
extern floatish xrange;
void
CurvesInit()
{
intish i;
x = (floatish*) xmalloc(nsamples * sizeof(floatish));
y = (floatish*) xmalloc(nsamples * sizeof(floatish));
py = (floatish*) xmalloc(nsamples * sizeof(floatish));
for (i = 0; i < nsamples; i++) {
x[i] = ((samplemap[i] - samplemap[0])/ xrange) * graphwidth;
y[i] = py[i] = 0.0;
}
}
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