static NodePtr makePerturbedUniform (UInt16 numSubdiv,
Real32 radius,
Real32 rate = 0.1f)
{
static Real32 factor = 1.1f;
NodePtr sphereNode = makeSphere(numSubdiv, radius);
GeometryPtr sphere = GeometryPtr::dcast(sphereNode->getCore());
GeoPositionsPtr points = sphere->getPositions();
beginEditCP(points);
for (UInt32 i=0; i<points->size(); ++i) {
Real32 random = (rand()/Real32(RAND_MAX));
if (random <= rate) {
points->setValue(factor*points->getValue(i), i);
}
}
endEditCP(points);
NodePtr node = Node::create();
beginEditCP(node);
node->setCore(Transform::create());
node->addChild(sphereNode);
endEditCP(node);
return node;
}
static NodePtr makePerturbedAll (UInt16 numSubdiv,
Real32 radius,
Real32 stdDeviation = 0.1f)
{
NodePtr sphereNode = makeSphere(numSubdiv, radius);
GeometryPtr sphere = GeometryPtr::dcast(sphereNode->getCore());
GeoPositionsPtr points = sphere->getPositions();
beginEditCP(points);
for (UInt32 i=0; i<points->size(); ++i) {
Real32 factor = 1.0f + stdDeviation * (rand()/Real32(RAND_MAX) - 0.5f);
points->setValue(factor*points->getValue(i), i);
}
endEditCP(points);
NodePtr node = Node::create();
beginEditCP(node);
node->setCore(Transform::create());
node->addChild(sphereNode);
endEditCP(node);
return node;
}
