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EXAMPLES
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IDRAW
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ISPLINES.C
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1980-01-05
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/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// $Header: isplines.c,v 1.8 89/10/09 14:48:26 linton Exp $
// implements classes IFillBSpline and IFillClosedBSpline.
#include "ipaint.h"
#include "isplines.h"
#include <InterViews/Graphic/util.h>
// IFillBSpline repeats the first and last points three times to
// ensure that the spline will pass through the first and last points.
IFillBSpline::IFillBSpline (Coord* ax, Coord* ay, int n, Graphic* gs)
: (ax, ay, n, gs) {
delete x;
delete y;
count = n + 4;
x = new Coord[count];
y = new Coord[count];
x[0] = ax[0];
x[1] = ax[0];
x[count - 1] = ax[n - 1];
x[count - 2] = ax[n - 1];
y[0] = ay[0];
y[1] = ay[0];
y[count - 1] = ay[n - 1];
y[count - 2] = ay[n - 1];
CopyArray(ax, ay, n, &x[2], &y[2]);
}
// contains returns true if the IFillBSpline contains the given point
// unless the brush is an arrow or the pattern is the "none" pattern.
boolean IFillBSpline::contains (PointObj& po, Graphic* gs) {
boolean contains = false;
IBrush* brush = (IBrush*) gs->GetBrush();
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!brush->LeftArrow() && !brush->RightArrow() && !pattern->None()) {
contains = FillBSpline::contains(po, gs);
}
return contains;
}
// intersects returns true if the IFillBSpline intersects the given
// box unless the brush is an arrow or the pattern is the "none"
// pattern.
boolean IFillBSpline::intersects (BoxObj& userb, Graphic* gs) {
boolean intersects = false;
IBrush* brush = (IBrush*) gs->GetBrush();
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!brush->LeftArrow() && !brush->RightArrow() && !pattern->None()) {
intersects = FillBSpline::intersects(userb, gs);
}
return intersects;
}
// draw draws the IFillBSpline unless the brush is an arrow or the
// pattern is the "none" pattern.
void IFillBSpline::draw (Canvas* c, Graphic* gs) {
IBrush* brush = (IBrush*) gs->GetBrush();
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!brush->LeftArrow() && !brush->RightArrow() && !pattern->None()) {
FillBSpline::draw(c, gs);
}
}
// IFillClosedBSpline passes its arguments to FillBSpline.
IFillClosedBSpline::IFillClosedBSpline (Coord* x, Coord* y, int n, Graphic* gs)
: (x, y, n, gs) {
}
// contains returns true if the IFillClosedBSpline contains the given
// point unless the pattern is the "none" pattern.
boolean IFillClosedBSpline::contains (PointObj& po, Graphic* gs) {
boolean contains = false;
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!pattern->None()) {
contains = FillBSpline::contains(po, gs);
}
return contains;
}
// intersects returns true if the IFillClosedBSpline intersects the
// given box unless the pattern is the "none" pattern.
boolean IFillClosedBSpline::intersects (BoxObj& userb, Graphic* gs) {
boolean intersects = false;
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!pattern->None()) {
intersects = FillBSpline::intersects(userb, gs);
}
return intersects;
}
// draw draws the IFillClosedBSpline unless the pattern is the "none"
// pattern.
void IFillClosedBSpline::draw (Canvas* c, Graphic* gs) {
IPattern* pattern = (IPattern*) gs->GetPattern();
if (!pattern->None()) {
FillBSpline::draw(c, gs);
}
}