/*!
\internal
*/
void CapsuleMesh::createGeometry(bool bForce)
{
// Create a new geometry node for this level of detail if necessary.
QGLSceneNode *geometry = 0;
QMap<int, QGLSceneNode *>::iterator It = d->lodGeometry.find(d->lod);
if (It != d->lodGeometry.end())
geometry = *It;
if (geometry && bForce) {
if (d->currentCapsule)
d->topNode->removeNode(d->currentCapsule);
d->currentCapsule = 0;
d->lodGeometry.erase(It);
geometry->setParent(0);
delete geometry;
geometry = 0;
}
if (!geometry) {
QGLBuilder builder;
// For the cylinder
int facets = 4 * (1 << d->lod);
int layers = (1 << d->lod) - 1;
// For the spheres
int divisions = d->lod;
// Sanity check - the height of the capsule must not be less than its
// diameter. A minimal capsule is a sphere - where diameter == height.
if (d->length < 2.0f * d->radius)
{
qWarning() << "Length of capsule must exceed its diameter"
<< " - correcting length.";
d->length = 2.0f * d->radius;
}
float diameter = d->radius+d->radius;
float cylinderHeight = d->length - diameter;
float offset = cylinderHeight/2.0f;
builder << QGL::Faceted;
QGLSceneNode *s = 0;
s = builder.newNode();
s->setObjectName(QLatin1String("Cylinder"));
builder << QGLCylinder(diameter, diameter, cylinderHeight,
facets, layers, false, false);
s = builder.newNode();
s->setObjectName(QLatin1String("LeftEndCap"));
builder << QGLDome(diameter, divisions, false);
QMatrix4x4 translateMatrix;
translateMatrix.setToIdentity();
translateMatrix.rotate(180.0f, 0.0f, 1.0f, 0.0f);
translateMatrix.translate(0.0f, 0.0f, offset);
builder.currentNode()->setLocalTransform(translateMatrix);
s = builder.newNode();
s->setObjectName(QLatin1String("RightEndCap"));
builder << QGLDome(diameter, divisions, false);
translateMatrix.setToIdentity();
translateMatrix.translate(0.0f, 0.0f, offset);
builder.currentNode()->setLocalTransform(translateMatrix);
geometry = builder.finalizedSceneNode();
geometry->setParent(this);
d->lodGeometry.insert(d->lod, geometry);
}
Q_ASSERT_X(geometry != 0, Q_FUNC_INFO, "Could not create/find geometry!");
if (d->currentCapsule != geometry)
{
if (d->currentCapsule)
d->topNode->removeNode(d->currentCapsule);
d->topNode->addNode(geometry);
d->currentCapsule = geometry;
}
if (!d->sceneSet)
{
setScene(new CapsuleScene(d->topNode));
d->sceneSet = true;
}
}
