void ossimImageDataHelper::fill(T dummyVariable,
const double* values,
const ossimPolygon& region,
bool clipPoly)
{
if(clipPoly)
{
ossimPolyArea2d polyArea(region);
ossimPolyArea2d clipArea = polyArea&thePolyImageRectangle;
vector<ossimPolygon> clipList;
// clipArea.getAllVisiblePolygons(clipList);
clipArea.getVisiblePolygons(clipList);
int i = 0;
for(i = 0; i < (int)clipList.size();++i)
{
fill(dummyVariable,
values,
clipList[i]);
}
}
else
{
fill(dummyVariable,
values,
region);
}
}
void ossimImageDataHelper::copyInputToThis(const T* inputBuf,
const ossimPolygon& region,
bool clipPoly)
{
if(clipPoly)
{
ossimPolyArea2d polyArea(region);
ossimPolyArea2d clipArea = polyArea&thePolyImageRectangle;
vector<ossimPolygon> clipList;
// clipArea.getAllVisiblePolygons(clipList);
clipArea.getVisiblePolygons(clipList);
int i = 0;
for(i = 0; i < (int)clipList.size();++i)
{
copyInputToThis(inputBuf,
clipList[i]);
}
}
else
{
copyInputToThis(inputBuf,
region);
}
}
double computeOverlapPP(double *ix, double *iy,
double minX, double maxX,
double minY, double maxY,
double pixelArea)
{
int npts;
double area;
double nx[100];
double ny[100];
double xp[4], yp[4];
/* Clip the input pixel polygon with the */
/* output pixel range */
npts = rectClip(4, ix, iy, nx, ny, minX, minY, maxX, maxY);
/* If no points, it may mean that */
/* the output is completely contained */
/* in the input */
if(npts < 3)
{
xp[0] = minX; yp[0] = minY;
xp[1] = maxX; yp[1] = minY;
xp[2] = maxX; yp[2] = maxY;
xp[3] = minX; yp[3] = maxY;
if(ptInPoly(ix[0], iy[0], 4, xp, yp))
{
area = pixelArea;
return area;
}
return 0.;
}
area = polyArea(npts, nx, ny) * pixelArea;
return(area);
}
void MapWidget::draw(QPainter &painter) {
_canvas.setPreviewMode(_isDragging || _isMeasureDragging);
_canvas.setGrayScale(!isEnabled() || _forceGrayScale);
_canvas.draw(painter);
if ( _isMeasuring ) {
painter.save();
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setPen(QPen(Qt::red, 2));
// draw geo line
QPoint p;
double dist = 0.0;
_canvas.projection()->project(p, _measurePoints[0]);
#if QT_VERSION >= 0x040400
painter.drawEllipse(QPointF(p), 1.3f, 1.3f);
#else
painter.drawEllipse(QRectF(p.x()-1.3f, p.y()-1.3f, 2.6f, 2.6f));
#endif
for ( int i = 1; i < _measurePoints.size(); ++i ) {
_canvas.projection()->project(p, _measurePoints[i]);
#if QT_VERSION >= 0x040400
painter.drawEllipse(QPointF(p), 1.3f, 1.3f);
#else
painter.drawEllipse(QRectF(p.x()-1.3f, p.y()-1.3f, 2.6f, 2.6f));
#endif
dist += _canvas.drawGeoLine(painter, _measurePoints[i-1], _measurePoints[i]);
}
QString aziArea;
if ( _measurePoints.size() > 2 ) {
painter.save();
QPen pen = QPen(Qt::red, 1, Qt::DashLine);
QVector<qreal> dashes;
dashes << 3 << 7;
pen.setDashPattern(dashes);
painter.setPen(pen);
_canvas.drawGeoLine(painter, _measurePoints.last(), _measurePoints.first());
painter.restore();
aziArea = QString("Area : %1 km²").arg(polyArea(_measurePoints));
}
else {
double tmp, azi1, azi2;
Math::Geo::delazi(_measurePoints.first().y(), _measurePoints.first().x(),
_measurePoints.last().y(), _measurePoints.last().x(),
&tmp, &azi1, &azi2);
aziArea = QString("AZ / BAZ: %1 ° / %2 °")
.arg(azi1, 0, 'f', 1)
.arg(azi2, 0, 'f', 1);
}
int precision = 0;
if ( _canvas.projection()->zoom() > 0 ) {
precision = (int) log10(_canvas.projection()->zoom());
}
++precision;
QString distStr = QString("Distance: %1 km / %2 °")
.arg(Math::Geo::deg2km(dist), 0, 'f', precision)
.arg(dist, 0, 'f', precision + 2);
QFont f = painter.font();
QFont mf = f;
mf.setFamily("Monospace");
mf.setStyleHint(QFont::TypeWriter);
QFontMetrics mfm(mf);
QFontMetrics fm(f);
int h = mfm.height() * 4 + fm.height();
int padding = fm.width(" ");
QRect r = QRect(0, rect().height() - h, mfm.width(distStr) + 2*padding, h);
painter.setPen(QPen(Qt::black));
painter.fillRect(r, QBrush(QColor(255, 255, 255, 140)));
r.setLeft(padding);
painter.setFont(mf);
_measureText = QString("Start : %1 / %2\n"
"End : %3 / %4\n"
"%5\n"
"%6")
.arg(lat2String(_measurePoints.first().y(), precision))
.arg(lon2String(_measurePoints.first().x(), precision))
.arg(lat2String(_measurePoints.last().y(), precision))
.arg(lon2String(_measurePoints.last().x(), precision))
.arg(distStr)
.arg(aziArea);
painter.drawText(r, Qt::AlignLeft, _measureText);
r.setTop(rect().height() - fm.height());
r.setRight(r.width()-padding);
painter.setFont(f);
painter.drawText(r, Qt::AlignRight, "(right click to copy/save)");
painter.restore();
}
}
double polyArea(T &v1, T &v2, Ts &&... vertices) {
return v2.X() * v1.Y() - v2.Y() * v1.X() +
polyArea(v2, std::forward<Ts>(vertices)...);
}
int
polyTriangulate(const Vert2_list *contour, tri_out_t *cb)
{
/* allocate and initialize list of Vertices in polygon */
int nv, m, u, v, w, count;
int *V;
if ( contour->nv < 3 ) return false;
V = (int *)malloc(sizeof(int)*contour->nv);
if (V == NULL) return false;
/* we want a counter-clockwise polygon in V */
if ( 0.0 < polyArea(contour) )
for (v=0; v<contour->nv; v++) V[v] = v;
else
for(v=0; v<contour->nv; v++) V[v] = (contour->nv-1)-v;
nv = contour->nv;
/* remove nv-2 Vertices, creating 1 triangle every time */
count = 2*nv; /* error detection */
for(m=0, v=nv-1; nv>2; )
{
/* if we loop, it is probably a non-simple polygon */
if (0 >= count--)
{
/* Triangulate: ERROR - probable bad polygon */
return false;
}
/* three consecutive vertices in current polygon, <u,v,w> */
u = v ; if (nv <= u) u = 0; /* previous */
v = u+1; if (nv <= v) v = 0; /* new v */
w = v+1; if (nv <= w) w = 0; /* next */
if ( polySnip(contour,u,v,w,nv,V) )
{
int a,b,c,s,t;
/* true names of the vertices */
a = V[u]; b = V[v]; c = V[w];
/* output Triangle */
if (!(*cb)(contour, a, b, c)) return false;
m++;
/* remove v from remaining polygon */
for(s=v,t=v+1;t<nv;s++,t++) V[s] = V[t]; nv--;
/* reset error detection counter */
count = 2*nv;
}
}
free(V);
return true;
}
