float EmberEntity::getHeight(const WFMath::Point<2>& localPosition) const
{
if (mHeightProvider) {
float height = 0;
if (mHeightProvider->getHeight(WFMath::Point<2>(localPosition.x(), localPosition.y()), height)) {
return height;
}
}
//A normal EmberEntity shouldn't know anything about the terrain, so we can't handle the area here.
//Instead we just pass it on to the parent until we get to someone who knows how to handle this (preferably the terrain).
if (getEmberLocation()) {
WFMath::Point<2> adjustedLocalPosition(getPredictedPos().x(), getPredictedPos().y());
WFMath::Vector<3> xVec = WFMath::Vector<3>(1.0, 0.0, 0.0).rotate(getOrientation());
double theta = atan2(xVec.y(), xVec.x()); // rotation about Z
WFMath::RotMatrix<2> rm;
WFMath::Vector<2> adjustment(localPosition.x(), localPosition.y());
adjustment.rotate(rm.rotation(theta));
adjustedLocalPosition += adjustment;
return getEmberLocation()->getHeight(adjustedLocalPosition) - getPredictedPos().z();
}
WFMath::Point<3> predictedPos = getPredictedPos();
if (predictedPos.isValid()) {
return predictedPos.z();
} else {
return 0.0f;
}
}
void Steering::setAwareness()
{
//If we are loitering we should stop that now.
delete mLoitering;
mLoitering = nullptr;
const auto entityViewPosition = mAvatar.getEntity()->getViewPosition();
WFMath::Point<2> destination2d(mViewDestination.x(), mViewDestination.z());
WFMath::Point<2> entityPosition2d(entityViewPosition.x(), entityViewPosition.z());
WFMath::Vector<2> direction(destination2d - entityPosition2d);
auto theta = std::atan2(direction.y(), direction.x()); // rotation about Y
WFMath::RotMatrix<2> rm;
rm.rotation(theta);
WFMath::Point<2> start = entityPosition2d;
start -= WFMath::Vector<2>(mPadding, mPadding);
WFMath::Vector<2> size(direction.mag() + (mPadding * 2), mPadding * 2);
WFMath::RotBox<2> area;
area.size() = size;
area.corner0() = start;
area.orientation() = WFMath::RotMatrix<2>().identity();
area.rotatePoint(rm, entityPosition2d);
mAwareness.setAwarenessArea(area, WFMath::Segment<2>(entityPosition2d, destination2d));
}
bool TerrainArea::parseArea()
{
if (!mEntity.hasAttr("area")) {
S_LOG_FAILURE("TerrainArea created for entity with no area attribute");
return false;
}
const Atlas::Message::Element areaElem(mEntity.valueOfAttr("area"));
if (!areaElem.isMap()) {
S_LOG_FAILURE("TerrainArea element ('area') must be of map type.");
return false;
}
const Atlas::Message::MapType& areaData(areaElem.asMap());
int layer = 0;
WFMath::Polygon<2> poly;
TerrainAreaParser parser;
if (parser.parseArea(areaData, poly, layer)) {
if (!mArea) {
mArea = new Mercator::Area(layer, false);
} else {
//A bit of an ugly hack here since the Mercator system doesn't support changing the layer. We need to swap the old area for a new one if the layer has changed.
if (mArea->getLayer() != layer) {
mOldArea = mArea;
mArea = new Mercator::Area(layer, false);
}
}
// transform polygon into terrain coords
WFMath::Vector<3> xVec = WFMath::Vector<3>(1.0, 0.0, 0.0).rotate(mEntity.getOrientation());
double theta = atan2(xVec.y(), xVec.x()); // rotation about Z
WFMath::RotMatrix<2> rm;
poly.rotatePoint(rm.rotation(theta), WFMath::Point<2>(0, 0));
poly.shift(WFMath::Vector<2>(mEntity.getPosition().x(), mEntity.getPosition().y()));
mArea->setShape(poly);
return true;
} else {
return false;
}
}
Mercator::TerrainMod* InnerTranslatorImpl<ModT, ShapeT>::createInstance(const WFMath::Point<3>& pos, const WFMath::Quaternion& orientation)
{
ShapeT<2> shape = this->mShape;
if (!shape.isValid() || !pos.isValid()) {
return nullptr;
}
if (orientation.isValid()) {
/// rotation about Z axis
WFMath::Vector<3> xVec = WFMath::Vector<3>(1.0, 0.0, 0.0).rotate(orientation);
WFMath::CoordType theta = std::atan2(xVec.y(), xVec.x());
WFMath::RotMatrix<2> rm;
shape.rotatePoint(rm.rotation(theta), WFMath::Point<2>(0, 0));
}
shape.shift(WFMath::Vector<2>(pos.x(), pos.y()));
float level = TerrainModTranslator::parsePosition(pos, this->mData);
return new ModT<ShapeT>(level, shape);
}
bool TerrainArea::placeArea(WFMath::Polygon<2>& poly)
{
//If the position if invalid we can't do anything with the area yet.
if (!mEntity.getPosition().isValid()) {
return false;
}
// transform polygon into terrain coords
if (mEntity.getOrientation().isValid()) {
WFMath::Vector<3> xVec = WFMath::Vector<3>(1.0, 0.0, 0.0).rotate(mEntity.getOrientation());
double theta = atan2(xVec.y(), xVec.x()); // rotation about Z
WFMath::RotMatrix<2> rm;
poly.rotatePoint(rm.rotation(theta), WFMath::Point<2>(0, 0));
}
poly.shift(WFMath::Vector<2>(mEntity.getPosition().x(), mEntity.getPosition().y()));
return true;
}
