void Projection::fromXML(QXmlStreamReader& stream)
{
if (stream.name() == "Projection") {
QString proj;
if (stream.attributes().hasAttribute("type"))
proj = stream.attributes().value("type").toString();
else
proj = QCoreApplication::translate("Projection", "Document");
stream.readNext();
if (stream.tokenType() == QXmlStreamReader::Characters) {
setProjectionType(stream.text().toString());
p->projType = proj;
stream.readNext();
} else
setProjectionType(proj);
}
}
ObjectCamera::ObjectCamera(float p_distance):
Camera(),
m_mouseX(0),
m_mouseY(0),
m_prevMouseX(0),
m_prevMouseY(0),
m_startPosition(0, 0, p_distance)
{
setTarget(Vector3(0, 0, 0));
setPosition(m_startPosition);
setProjectionType(ProjectionType::Perspective);
}
/*!
* Defines a perspective projection based on \a fieldOfView, \a aspectRatio, \a
* nearPlane, \a farPlane.
*/
void QCameraLens::setPerspectiveProjection(float fieldOfView, float aspectRatio,
float nearPlane, float farPlane)
{
Q_D(QCameraLens);
bool block = blockNotifications(true);
setFieldOfView(fieldOfView);
setAspectRatio(aspectRatio);
setNearPlane(nearPlane);
setFarPlane(farPlane);
setProjectionType(PerspectiveProjection);
blockNotifications(block);
d->updateProjectionMatrix();
}
Projection::Projection(void)
: p(new ProjectionPrivate)
{
#if defined(Q_OS_WIN) && !defined(_MOBILE)
QString pdir(QDir::toNativeSeparators(qApp->applicationDirPath() + "/" STRINGIFY(SHARE_DIR) "/proj"));
const char* proj_dir = pdir.toUtf8().constData();
// const char* proj_dir = "E:\\cbro\\src\\merkaartor-devel\\binaries\\bin\\share\\proj";
pj_set_searchpath(1, &proj_dir);
#endif // Q_OS_WIN
#ifndef _MOBILE
theProj = NULL;
p->theWGS84Proj = Projection::getProjection("+proj=longlat +ellps=WGS84 +datum=WGS84");
setProjectionType(M_PREFS->getProjectionType());
#endif
}
/*!
* Defines an orthographic projection based on \a left, \a right, \a bottom, \a
* top, \a nearPlane, \a farPlane.
*/
void QCameraLens::setFrustumProjection(float left, float right,
float bottom, float top,
float nearPlane, float farPlane)
{
Q_D(QCameraLens);
bool block = blockNotifications(true);
setLeft(left);
setRight(right);
setBottom(bottom);
setTop(top);
setNearPlane(nearPlane);
setFarPlane(farPlane);
setProjectionType(FrustumProjection);
blockNotifications(block);
d->updateProjectionMatrix();
}
void OctreeProjectedPolygon::merge(const OctreeProjectedPolygon& that) {
// RIGHT/NEAR
// LEFT/NEAR
if (
(getProjectionType() == that.getProjectionType()) &&
(
getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR) ||
getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR)
)
) {
if (getVertex(1) == that.getVertex(0) && getVertex(4) == that.getVertex(5)) {
//setVertex(0, this.getVertex(0)); // no change
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
//setVertex(5, this.getVertex(5)); // no change
return; // done
}
if (getVertex(0) == that.getVertex(1) && getVertex(5) == that.getVertex(4)) {
setVertex(0, that.getVertex(0));
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, that.getVertex(4)); // no change
setVertex(5, that.getVertex(5));
return; // done
}
if (getVertex(2) == that.getVertex(1) && getVertex(3) == that.getVertex(4)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, that.getVertex(5)); // no change
return; // done
}
if (getVertex(1) == that.getVertex(2) && getVertex(4) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, that.getVertex(3)); // no change
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
}
// NEAR/BOTTOM
if (
(getProjectionType() == that.getProjectionType()) &&
(
getProjectionType() == (PROJECTION_NEAR | PROJECTION_BOTTOM)
)
) {
if (getVertex(0) == that.getVertex(5) && getVertex(3) == that.getVertex(4)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, that.getVertex(5)); // no change
return; // done
}
if (getVertex(5) == that.getVertex(0) && getVertex(4) == that.getVertex(3)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, that.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, that.getVertex(3)); // no change
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
if (getVertex(1) == that.getVertex(0) && getVertex(2) == that.getVertex(3)) {
//setVertex(0, this.getVertex(0)); // no change
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
//setVertex(3, that.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, that.getVertex(5)); // no change
return; // done
}
if (getVertex(0) == that.getVertex(1) && getVertex(3) == that.getVertex(2)) {
setVertex(0, that.getVertex(0));
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, that.getVertex(2)); // no change
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
}
// NEAR/TOP
if (
(getProjectionType() == that.getProjectionType()) &&
(
getProjectionType() == (PROJECTION_NEAR | PROJECTION_TOP)
)
) {
if (getVertex(0) == that.getVertex(5) && getVertex(1) == that.getVertex(2)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, that.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, that.getVertex(5)); // no change
return; // done
}
if (getVertex(5) == that.getVertex(0) && getVertex(2) == that.getVertex(1)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, that.getVertex(1)); // no change
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
if (getVertex(4) == that.getVertex(5) && getVertex(3) == that.getVertex(2)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, that.getVertex(1)); // no change
//setVertex(2, that.getVertex(2)); // no change
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
//setVertex(5, that.getVertex(5)); // no change
return; // done
}
if (getVertex(5) == that.getVertex(4) && getVertex(2) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, that.getVertex(3)); // no change
setVertex(5, that.getVertex(5));
return; // done
}
}
// RIGHT/NEAR & NEAR/RIGHT/TOP
// LEFT/NEAR & NEAR/LEFT/TOP
if (
((getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_TOP)) &&
(that.getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR)))
||
((getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_TOP)) &&
(that.getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR)))
)
{
if (getVertex(5) == that.getVertex(0) && getVertex(3) == that.getVertex(2)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
setProjectionType((PROJECTION_RIGHT | PROJECTION_NEAR));
return; // done
}
}
// RIGHT/NEAR & NEAR/RIGHT/TOP
// LEFT/NEAR & NEAR/LEFT/TOP
if (
((that.getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_TOP)) &&
(getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR)))
||
((that.getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_TOP)) &&
(getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR)))
)
{
if (getVertex(0) == that.getVertex(5) && getVertex(2) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, this.getVertex(5)); // no change
//setProjectionType((PROJECTION_RIGHT | PROJECTION_NEAR)); // no change
return; // done
}
}
// RIGHT/NEAR & NEAR/RIGHT/BOTTOM
// NEAR/LEFT & NEAR/LEFT/BOTTOM
if (
((that.getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_BOTTOM)) &&
(getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR)))
||
((that.getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_BOTTOM)) &&
(getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR)))
)
{
if (getVertex(5) == that.getVertex(0) && getVertex(3) == that.getVertex(2)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
//setProjectionType((PROJECTION_RIGHT | PROJECTION_NEAR)); // no change
return; // done
}
}
// RIGHT/NEAR & NEAR/RIGHT/BOTTOM
// NEAR/LEFT & NEAR/LEFT/BOTTOM
if (
((getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_BOTTOM)) &&
(that.getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR)))
||
((getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_BOTTOM)) &&
(that.getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR)))
)
{
if (getVertex(0) == that.getVertex(5) && getVertex(2) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, this.getVertex(5)); // no change
setProjectionType((PROJECTION_RIGHT | PROJECTION_NEAR));
return; // done
}
}
// NEAR/TOP & NEAR
if (
(getProjectionType() == (PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_NEAR | PROJECTION_TOP ))
)
{
if (getVertex(0) == that.getVertex(5) && getVertex(1) == that.getVertex(2)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
//setVertexCount(4); // no change
//setProjectionType((PROJECTION_NEAR)); // no change
return; // done
}
}
// NEAR/TOP & NEAR
if (
(that.getProjectionType() == (PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_NEAR | PROJECTION_TOP ))
)
{
if (getVertex(5) == that.getVertex(0) && getVertex(2) == that.getVertex(1)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
setVertexCount(4);
setProjectionType((PROJECTION_NEAR));
return; // done
}
}
// NEAR/BOTTOM & NEAR
if (
(getProjectionType() == (PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_NEAR | PROJECTION_BOTTOM ))
)
{
if (getVertex(2) == that.getVertex(3) && getVertex(3) == that.getVertex(0)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(4));
setVertex(3, that.getVertex(5));
//setVertexCount(4); // no change
//setProjectionType((PROJECTION_NEAR)); // no change
}
}
// NEAR/BOTTOM & NEAR
if (
(that.getProjectionType() == (PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_NEAR | PROJECTION_BOTTOM ))
)
{
if (getVertex(3) == that.getVertex(2) && getVertex(0) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, getVertex(4));
setVertex(3, getVertex(5));
setVertexCount(4);
setProjectionType((PROJECTION_NEAR));
return; // done
}
}
// NEAR/RIGHT & NEAR
if (
(getProjectionType() == (PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_NEAR | PROJECTION_RIGHT ))
)
{
if (getVertex(0) == that.getVertex(1) && getVertex(3) == that.getVertex(4)) {
setVertex(0, that.getVertex(0));
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
setVertex(3, that.getVertex(5));
//setVertexCount(4); // no change
//setProjectionType((PROJECTION_NEAR)); // no change
}
}
// NEAR/RIGHT & NEAR
if (
(that.getProjectionType() == (PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_NEAR | PROJECTION_RIGHT ))
)
{
if (getVertex(1) == that.getVertex(0) && getVertex(4) == that.getVertex(3)) {
//setVertex(0, this.getVertex(0)); // no change
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
setVertex(3, getVertex(5));
setVertexCount(4);
setProjectionType((PROJECTION_NEAR));
return; // done
}
}
// NEAR/LEFT & NEAR
if (
(getProjectionType() == (PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_NEAR | PROJECTION_LEFT ))
)
{
if (getVertex(1) == that.getVertex(1) && getVertex(2) == that.getVertex(4)) {
//setVertex(0, this.getVertex()); // no change
setVertex(1, that.getVertex(2));
setVertex(2, that.getVertex(3));
//setVertex(3, this.getVertex(3)); // no change
//setVertexCount(4); // no change
//setProjectionType((PROJECTION_NEAR)); // no change
return; // done
}
}
// NEAR/LEFT & NEAR
if (
(that.getProjectionType() == (PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_NEAR | PROJECTION_LEFT ))
)
{
if (getVertex(1) == that.getVertex(0) && getVertex(4) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, getVertex(2));
setVertex(2, getVertex(3));
setVertex(3, that.getVertex(3));
setVertexCount(4);
setProjectionType((PROJECTION_NEAR));
return; // done
}
}
// NEAR/RIGHT/TOP & NEAR/TOP
if (
((getProjectionType() == (PROJECTION_TOP | PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_TOP | PROJECTION_NEAR | PROJECTION_RIGHT )))
)
{
if (getVertex(0) == that.getVertex(1) && getVertex(4) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
}
// NEAR/RIGHT/TOP & NEAR/TOP
if (
((that.getProjectionType() == (PROJECTION_TOP | PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_TOP | PROJECTION_NEAR | PROJECTION_RIGHT )))
)
{
if (getVertex(1) == that.getVertex(0) && getVertex(3) == that.getVertex(4)) {
//setVertex(0, this.getVertex(0)); // no change
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, this.getVertex(5)); // no change
setProjectionType((PROJECTION_TOP | PROJECTION_NEAR));
return; // done
}
}
// NEAR/RIGHT/BOTTOM & NEAR/BOTTOM
if (
((getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR | PROJECTION_RIGHT )))
)
{
if (getVertex(1) == that.getVertex(2) && getVertex(5) == that.getVertex(4)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
setVertex(5, that.getVertex(5));
return; // done
}
}
// NEAR/RIGHT/BOTTOM & NEAR/BOTTOM
if (
((that.getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR | PROJECTION_RIGHT )))
)
{
if (getVertex(2) == that.getVertex(1) && getVertex(4) == that.getVertex(5)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
//setVertex(5, this.getVertex(5)); // no change
setProjectionType((PROJECTION_BOTTOM | PROJECTION_NEAR));
return; // done
}
}
// NEAR/LEFT/BOTTOM & NEAR/BOTTOM
if (
((getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR )) &&
(that.getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR | PROJECTION_LEFT )))
)
{
if (getVertex(2) == that.getVertex(0) && getVertex(4) == that.getVertex(4)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(1));
setVertex(3, that.getVertex(2));
setVertex(4, that.getVertex(3));
//setVertex(5, this.getVertex(5)); // no change
return; // done
}
}
// NEAR/LEFT/BOTTOM & NEAR/BOTTOM
if (
((that.getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR )) &&
(getProjectionType() == (PROJECTION_BOTTOM | PROJECTION_NEAR | PROJECTION_LEFT )))
)
{
if (getVertex(0) == that.getVertex(2) && getVertex(4) == that.getVertex(4)) {
// we need to do this in an unusual order, because otherwise we'd overwrite our own values
setVertex(4, getVertex(3));
setVertex(3, getVertex(2));
setVertex(2, getVertex(1));
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(5, that.getVertex(5));
setProjectionType((PROJECTION_BOTTOM | PROJECTION_NEAR));
return; // done
}
}
// RIGHT/NEAR/BOTTOM
// RIGHT/NEAR/TOP
// LEFT/NEAR/BOTTOM
// LEFT/NEAR/TOP
if (
(getProjectionType() == that.getProjectionType()) &&
(
getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_BOTTOM ) ||
getProjectionType() == (PROJECTION_RIGHT | PROJECTION_NEAR | PROJECTION_TOP ) ||
getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_BOTTOM ) ||
getProjectionType() == (PROJECTION_LEFT | PROJECTION_NEAR | PROJECTION_TOP )
)
) {
if (getVertex(0) == that.getVertex(5) && getVertex(2) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, this.getVertex(5)); // no change
return; // done
}
if (getVertex(5) == that.getVertex(0) && getVertex(3) == that.getVertex(2)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
if (getVertex(2) == that.getVertex(1) && getVertex(4) == that.getVertex(5)) {
//setVertex(0, this.getVertex(0)); // no change
//setVertex(1, this.getVertex(1)); // no change
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
setVertex(4, that.getVertex(4));
//setVertex(5, this.getVertex(5)); // no change
return; // done
}
if (getVertex(1) == that.getVertex(2) && getVertex(5) == that.getVertex(4)) {
setVertex(0, that.getVertex(0));
setVertex(1, that.getVertex(1));
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
//setVertex(4, this.getVertex(4)); // no change
setVertex(5, that.getVertex(5));
return; // done
}
// if this.([1],[3]) == that.([0],[4]) then create polygon: this.[0], that.[1], that.[2], that.[3], this.[4], this.[5]
if (getVertex(1) == that.getVertex(0) && getVertex(3) == that.getVertex(4)) {
//setVertex(0, this.getVertex(0)); // no change
setVertex(1, that.getVertex(1));
setVertex(2, that.getVertex(2));
setVertex(3, that.getVertex(3));
//setVertex(4, this.getVertex(4)); // no change
//setVertex(5, this.getVertex(5)); // no change
return; // done
}
// if this.([0],[4]) == that.([1],[3]) then create polygon: that.[0], this.[1], this.[2], this.[3], that.[4], that.[5]
if (getVertex(0) == that.getVertex(1) && getVertex(4) == that.getVertex(3)) {
setVertex(0, that.getVertex(0));
//setVertex(1, this.getVertex(1)); // no change
//setVertex(2, this.getVertex(2)); // no change
//setVertex(3, this.getVertex(3)); // no change
setVertex(4, that.getVertex(4));
setVertex(5, that.getVertex(5));
return; // done
}
}
}
