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Improve getPointedThing() (#4346)

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* Improved getPointedThing()

The new algorithm checks every node exactly once.
Now the point and normal vector of the collision is also returned in the
PointedThing (currently they are not used outside of the function).
Now the CNodeDefManager keeps the union of all possible nodeboxes, so
the raycast won't miss any nodes. Also if there are only small
nodeboxes, getPointedThing() is exceptionally fast.
Also adds unit test for VoxelLineIterator.

* Cleanup, code move

This commit moves getPointedThing() and
Client::getSelectedActiveObject() to ClientEnvironment.
The map nodes now can decide which neighbors they are connecting to
(MapNode::getNeighbors()).
This commit is contained in:
Dániel Juhász 2017-01-04 19:18:40 +01:00 • committed by est31
parent 8aadc62856
commit 3f8261830e
20 changed files with 1046 additions and 433 deletions
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46
src/mapnode.cpp
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@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "mapnode.h"
#include "porting.h"
#include "nodedef.h"
#include "map.h"
#include "content_mapnode.h" // For mapnode_translate_*_internal
#include "serialization.h" // For ser_ver_supported
#include "util/serialize.h"
@ -453,6 +454,51 @@ void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
}
}
static inline void getNeighborConnectingFace(
v3s16 p, INodeDefManager *nodedef,
Map *map, MapNode n, u8 bitmask, u8 *neighbors)
{
MapNode n2 = map->getNodeNoEx(p);
if (nodedef->nodeboxConnects(n, n2, bitmask))
*neighbors |= bitmask;
}
u8 MapNode::getNeighbors(v3s16 p, Map *map)
{
INodeDefManager *nodedef=map->getNodeDefManager();
u8 neighbors = 0;
const ContentFeatures &f = nodedef->get(*this);
// locate possible neighboring nodes to connect to
if (f.drawtype == NDT_NODEBOX && f.node_box.type == NODEBOX_CONNECTED) {
v3s16 p2 = p;
p2.Y++;
getNeighborConnectingFace(p2, nodedef, map, *this, 1, &neighbors);
p2 = p;
p2.Y--;
getNeighborConnectingFace(p2, nodedef, map, *this, 2, &neighbors);
p2 = p;
p2.Z--;
getNeighborConnectingFace(p2, nodedef, map, *this, 4, &neighbors);
p2 = p;
p2.X--;
getNeighborConnectingFace(p2, nodedef, map, *this, 8, &neighbors);
p2 = p;
p2.Z++;
getNeighborConnectingFace(p2, nodedef, map, *this, 16, &neighbors);
p2 = p;
p2.X++;
getNeighborConnectingFace(p2, nodedef, map, *this, 32, &neighbors);
}
return neighbors;
}
void MapNode::getNodeBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
{
const ContentFeatures &f = nodemgr->get(*this);