BRNSystems/minetest
1
0
Fork 0
forked from Mirrorlandia_minetest/minetest
Code Pull Requests 1 Activity

Expose getPointedThing to Lua

Browse Source 
This commit introduces Raycast, a Lua user object, which can be
used to perform a raycast on the map. The ray is continuable, so one can
also get hidden nodes (for example to see trough glass).
This commit is contained in:
Dániel Juhász 2016-07-23 21:11:20 +02:00 committed by paramat
parent a80ecbee1e
commit 3caad3f3c9
25 changed files with 671 additions and 313 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
doc/lua_api.txt
View File

@ -2557,6 +2557,12 @@ and `minetest.auth_reload` call the authetification handler.
* `pos2`: Second position
* `stepsize`: smaller gives more accurate results but requires more computing
time. Default is `1`.
* `minetest.raycast(pos1, pos2, objects, liquids)`: returns `Raycast`
* Creates a `Raycast` object.
* `pos1`: start of the ray
* `pos2`: end of the ray
* `objects` : if false, only nodes will be returned. Default is `true`.
* `liquids' : if false, liquid nodes won't be returned. Default is `false`.
* `minetest.find_path(pos1,pos2,searchdistance,max_jump,max_drop,algorithm)`
* returns table containing path
* returns a table of 3D points representing a path from `pos1` to `pos2` or `nil`
@ -3755,6 +3761,26 @@ It can be created via `Settings(filename)`.
* Writes changes to file.
* `to_table()`: returns `{[key1]=value1,...}`
### `Raycast`
A raycast on the map. It works with selection boxes.
Can be used as an iterator in a for loop.
The map is loaded as the ray advances. If the
map is modified after the `Raycast` is created,
the changes may or may not have an effect on
the object.
It can be created via `Raycast(pos1, pos2, objects, liquids)` or
`minetest.raycast(pos1, pos2, objects, liquids)` where:
* `pos1`: start of the ray
* `pos2`: end of the ray
* `objects` : if false, only nodes will be returned. Default is true.
* `liquids' : if false, liquid nodes won't be returned. Default is false.
#### Methods
* `next()`: returns a `pointed_thing`
* Returns the next thing pointed by the ray or nil.
Mapgen objects
--------------
A mapgen object is a construct used in map generation. Mapgen objects can be used

2
src/CMakeLists.txt
View File

@ -428,9 +428,9 @@ set(common_SRCS
porting.cpp
profiler.cpp
quicktune.cpp
raycast.cpp
reflowscan.cpp
remoteplayer.cpp
raycast.cpp
rollback.cpp
rollback_interface.cpp
serialization.cpp

23
src/activeobject.h
View File

@ -65,7 +65,7 @@ public:
{
}
u16 getId()
u16 getId() const
{
return m_id;
}
@ -76,7 +76,28 @@ public:
}
virtual ActiveObjectType getType() const = 0;
/*!
* Returns the collision box of the object.
* This box is translated by the object's
* location.
* The box's coordinates are world coordinates.
* @returns true if the object has a collision box.
*/
virtual bool getCollisionBox(aabb3f *toset) const = 0;
/*!
* Returns the selection box of the object.
* This box is not translated when the
* object moves.
* The box's coordinates are world coordinates.
* @returns true if the object has a selection box.
*/
virtual bool getSelectionBox(aabb3f *toset) const = 0;
virtual bool collideWithObjects() const = 0;
protected:
u16 m_id; // 0 is invalid, "no id"

239
src/clientenvironment.cpp
View File

@ -604,240 +604,31 @@ ClientEnvEvent ClientEnvironment::getClientEnvEvent()
return event;
}
ClientActiveObject * ClientEnvironment::getSelectedActiveObject(
const core::line3d<f32> &shootline_on_map, v3f *intersection_point,
v3s16 *intersection_normal)
void ClientEnvironment::getSelectedActiveObjects(
const core::line3d<f32> &shootline_on_map,
std::vector<PointedThing> &objects)
{
std::vector<DistanceSortedActiveObject> objects;
std::vector<DistanceSortedActiveObject> allObjects;
getActiveObjects(shootline_on_map.start,
shootline_on_map.getLength() + 3, objects);
shootline_on_map.getLength() + 10.0f, allObjects);
const v3f line_vector = shootline_on_map.getVector();
// Sort them.
// After this, the closest object is the first in the array.
std::sort(objects.begin(), objects.end());
/* Because objects can have different nodebox sizes,
* the object whose center is the nearest isn't necessarily
* the closest one. If an object is found, don't stop
* immediately. */
f32 d_min = shootline_on_map.getLength();
ClientActiveObject *nearest_obj = NULL;
for (u32 i = 0; i < objects.size(); i++) {
ClientActiveObject *obj = objects[i].obj;
aabb3f *selection_box = obj->getSelectionBox();
if (selection_box == NULL)
for (u32 i = 0; i < allObjects.size(); i++) {
ClientActiveObject *obj = allObjects[i].obj;
aabb3f selection_box;
if (!obj->getSelectionBox(&selection_box))
continue;
v3f pos = obj->getPosition();
aabb3f offsetted_box(selection_box->MinEdge + pos,
selection_box->MaxEdge + pos);
if (offsetted_box.getCenter().getDistanceFrom(
shootline_on_map.start) > d_min + 9.6f*BS) {
// Probably there is no active object that has bigger nodebox than
// (-5.5,-5.5,-5.5,5.5,5.5,5.5)
// 9.6 > 5.5*sqrt(3)
break;
}
aabb3f offsetted_box(selection_box.MinEdge + pos,
selection_box.MaxEdge + pos);
v3f current_intersection;
v3s16 current_normal;
if (boxLineCollision(offsetted_box, shootline_on_map.start, line_vector,
&current_intersection, &current_normal)) {
f32 d_current = current_intersection.getDistanceFrom(
shootline_on_map.start);
if (d_current <= d_min) {
d_min = d_current;
nearest_obj = obj;
*intersection_point = current_intersection;
*intersection_normal = current_normal;
}
&current_intersection, &current_normal)) {
objects.push_back(PointedThing(
(s16) obj->getId(), current_intersection, current_normal,
(current_intersection - shootline_on_map.start).getLengthSQ()));
}
}
return nearest_obj;
}
/*
Check if a node is pointable
*/
static inline bool isPointableNode(const MapNode &n,
INodeDefManager *ndef, bool liquids_pointable)
{
const ContentFeatures &features = ndef->get(n);
return features.pointable ||
(liquids_pointable && features.isLiquid());
}
PointedThing ClientEnvironment::getPointedThing(
core::line3d<f32> shootline,
bool liquids_pointable,
bool look_for_object)
{
PointedThing result;
INodeDefManager *nodedef = m_map->getNodeDefManager();
core::aabbox3d<s16> maximal_exceed = nodedef->getSelectionBoxIntUnion();
// The code needs to search these nodes
core::aabbox3d<s16> search_range(-maximal_exceed.MaxEdge,
-maximal_exceed.MinEdge);
// If a node is found, there might be a larger node behind.
// To find it, we have to go further.
s16 maximal_overcheck =
std::max(abs(search_range.MinEdge.X), abs(search_range.MaxEdge.X))
+ std::max(abs(search_range.MinEdge.Y), abs(search_range.MaxEdge.Y))
+ std::max(abs(search_range.MinEdge.Z), abs(search_range.MaxEdge.Z));
const v3f original_vector = shootline.getVector();
const f32 original_length = original_vector.getLength();
f32 min_distance = original_length;
// First try to find an active object
if (look_for_object) {
ClientActiveObject *selected_object = getSelectedActiveObject(
shootline, &result.intersection_point,
&result.intersection_normal);
if (selected_object != NULL) {
min_distance =
(result.intersection_point - shootline.start).getLength();
result.type = POINTEDTHING_OBJECT;
result.object_id = selected_object->getId();
}
}
// Reduce shootline
if (original_length > 0) {
shootline.end = shootline.start
+ shootline.getVector() / original_length * min_distance;
}
// Try to find a node that is closer than the selected active
// object (if it exists).
voxalgo::VoxelLineIterator iterator(shootline.start / BS,
shootline.getVector() / BS);
v3s16 oldnode = iterator.m_current_node_pos;
// Indicates that a node was found.
bool is_node_found = false;
// If a node is found, it is possible that there's a node
// behind it with a large nodebox, so continue the search.
u16 node_foundcounter = 0;
// If a node is found, this is the center of the
// first nodebox the shootline meets.
v3f found_boxcenter(0, 0, 0);
// The untested nodes are in this range.
core::aabbox3d<s16> new_nodes;
while (true) {
// Test the nodes around the current node in search_range.
new_nodes = search_range;
new_nodes.MinEdge += iterator.m_current_node_pos;
new_nodes.MaxEdge += iterator.m_current_node_pos;
// Only check new nodes
v3s16 delta = iterator.m_current_node_pos - oldnode;
if (delta.X > 0)
new_nodes.MinEdge.X = new_nodes.MaxEdge.X;
else if (delta.X < 0)
new_nodes.MaxEdge.X = new_nodes.MinEdge.X;
else if (delta.Y > 0)
new_nodes.MinEdge.Y = new_nodes.MaxEdge.Y;
else if (delta.Y < 0)
new_nodes.MaxEdge.Y = new_nodes.MinEdge.Y;
else if (delta.Z > 0)
new_nodes.MinEdge.Z = new_nodes.MaxEdge.Z;
else if (delta.Z < 0)
new_nodes.MaxEdge.Z = new_nodes.MinEdge.Z;
// For each untested node
for (s16 x = new_nodes.MinEdge.X; x <= new_nodes.MaxEdge.X; x++) {
for (s16 y = new_nodes.MinEdge.Y; y <= new_nodes.MaxEdge.Y; y++) {
for (s16 z = new_nodes.MinEdge.Z; z <= new_nodes.MaxEdge.Z; z++) {
MapNode n;
v3s16 np(x, y, z);
bool is_valid_position;
n = m_map->getNodeNoEx(np, &is_valid_position);
if (!(is_valid_position &&
isPointableNode(n, nodedef, liquids_pointable))) {
continue;
}
std::vector<aabb3f> boxes;
n.getSelectionBoxes(nodedef, &boxes,
n.getNeighbors(np, m_map));
v3f npf = intToFloat(np, BS);
for (std::vector<aabb3f>::const_iterator i = boxes.begin();
i != boxes.end(); ++i) {
aabb3f box = *i;
box.MinEdge += npf;
box.MaxEdge += npf;
v3f intersection_point;
v3s16 intersection_normal;
if (!boxLineCollision(box, shootline.start, shootline.getVector(),
&intersection_point, &intersection_normal)) {
continue;
}
f32 distance = (intersection_point - shootline.start).getLength();
if (distance >= min_distance) {
continue;
}
result.type = POINTEDTHING_NODE;
result.node_undersurface = np;
result.intersection_point = intersection_point;
result.intersection_normal = intersection_normal;
found_boxcenter = box.getCenter();
min_distance = distance;
is_node_found = true;
}
}
}
}
if (is_node_found) {
node_foundcounter++;
if (node_foundcounter > maximal_overcheck) {
break;
}
}
// Next node
if (iterator.hasNext()) {
oldnode = iterator.m_current_node_pos;
iterator.next();
} else {
break;
}
}
if (is_node_found) {
// Set undersurface and abovesurface nodes
f32 d = 0.002 * BS;
v3f fake_intersection = result.intersection_point;
// Move intersection towards its source block.
if (fake_intersection.X < found_boxcenter.X)
fake_intersection.X += d;
else
fake_intersection.X -= d;
if (fake_intersection.Y < found_boxcenter.Y)
fake_intersection.Y += d;
else
fake_intersection.Y -= d;
if (fake_intersection.Z < found_boxcenter.Z)
fake_intersection.Z += d;
else
fake_intersection.Z -= d;
result.node_real_undersurface = floatToInt(fake_intersection, BS);
result.node_abovesurface = result.node_real_undersurface
+ result.intersection_normal;
}
return result;
}

36
src/clientenvironment.h
View File

@ -30,7 +30,6 @@ class ClientScripting;
class ClientActiveObject;
class GenericCAO;
class LocalPlayer;
struct PointedThing;
/*
The client-side environment.
@ -125,44 +124,15 @@ public:
std::vector<DistanceSortedActiveObject> &dest);
bool hasClientEnvEvents() const { return !m_client_event_queue.empty(); }
// Get event from queue. If queue is empty, it triggers an assertion failure.
ClientEnvEvent getClientEnvEvent();
/*!
* Gets closest object pointed by the shootline.
* Returns NULL if not found.
*
* \param[in] shootline_on_map the shootline for
* the test in world coordinates
* \param[out] intersection_point the first point where
* the shootline meets the object. Valid only if
* not NULL is returned.
* \param[out] intersection_normal the normal vector of
* the intersection, pointing outwards. Zero vector if
* the shootline starts in an active object.
* Valid only if not NULL is returned.
*/
ClientActiveObject * getSelectedActiveObject(
virtual void getSelectedActiveObjects(
const core::line3d<f32> &shootline_on_map,
v3f *intersection_point,
v3s16 *intersection_normal
std::vector<PointedThing> &objects
);
/*!
* Performs a raycast on the world.
* Returns the first thing the shootline meets.
*
* @param[in] shootline the shootline, starting from
* the camera position. This also gives the maximal distance
* of the search.
* @param[in] liquids_pointable if false, liquids are ignored
* @param[in] look_for_object if false, objects are ignored
*/
PointedThing getPointedThing(
core::line3d<f32> shootline,
bool liquids_pointable,
bool look_for_object);
u16 attachement_parent_ids[USHRT_MAX + 1];
const std::list<std::string> &getPlayerNames() { return m_player_names; }

2
src/clientobject.h
View File

@ -44,8 +44,8 @@ public:
virtual void updateLight(u8 light_at_pos){}
virtual void updateLightNoCheck(u8 light_at_pos){}
virtual v3s16 getLightPosition(){return v3s16(0,0,0);}
virtual aabb3f *getSelectionBox() { return NULL; }
virtual bool getCollisionBox(aabb3f *toset) const { return false; }
virtual bool getSelectionBox(aabb3f *toset) const { return false; }
virtual bool collideWithObjects() const { return false; }
virtual v3f getPosition(){ return v3f(0,0,0); }
virtual float getYaw() const { return 0; }

23
src/content_cao.cpp
View File

@ -283,8 +283,14 @@ public:
void initialize(const std::string &data);
aabb3f *getSelectionBox()
{return &m_selection_box;}
virtual bool getSelectionBox(aabb3f *toset) const
{
*toset = m_selection_box;
return true;
}
v3f getPosition()
{return m_position;}
inline float getYaw() const
@ -605,11 +611,14 @@ GenericCAO::~GenericCAO()
removeFromScene(true);
}
aabb3f *GenericCAO::getSelectionBox()
bool GenericCAO::getSelectionBox(aabb3f *toset) const
{
if(!m_prop.is_visible || !m_is_visible || m_is_local_player || getParent() != NULL)
return NULL;
return &m_selection_box;
if (!m_prop.is_visible || !m_is_visible || m_is_local_player
|| getParent() != NULL){
return false;
}
*toset = m_selection_box;
return true;
}
v3f GenericCAO::getPosition()
@ -658,7 +667,7 @@ void GenericCAO::setAttachments()
updateAttachments();
}
ClientActiveObject* GenericCAO::getParent()
ClientActiveObject* GenericCAO::getParent() const
{
ClientActiveObject *obj = NULL;

4
src/content_cao.h
View File

@ -129,13 +129,13 @@ public:
void processInitData(const std::string &data);
ClientActiveObject *getParent();
ClientActiveObject *getParent() const;
bool getCollisionBox(aabb3f *toset) const;
bool collideWithObjects() const;
aabb3f *getSelectionBox();
virtual bool getSelectionBox(aabb3f *toset) const;
v3f getPosition();
inline float getYaw() const

26
src/content_sao.cpp
View File

@ -91,6 +91,9 @@ public:
}
bool getCollisionBox(aabb3f *toset) const { return false; }
virtual bool getSelectionBox(aabb3f *toset) const { return false; }
bool collideWithObjects() const { return false; }
private:
@ -746,6 +749,18 @@ bool LuaEntitySAO::getCollisionBox(aabb3f *toset) const
return false;
}
bool LuaEntitySAO::getSelectionBox(aabb3f *toset) const
{
if (!m_prop.is_visible) {
return false;
}
toset->MinEdge = m_prop.collisionbox.MinEdge * BS;
toset->MaxEdge = m_prop.collisionbox.MaxEdge * BS;
return true;
}
bool LuaEntitySAO::collideWithObjects() const
{
return m_prop.collideWithObjects;
@ -1405,3 +1420,14 @@ bool PlayerSAO::getCollisionBox(aabb3f *toset) const
toset->MaxEdge += m_base_position;
return true;
}
bool PlayerSAO::getSelectionBox(aabb3f *toset) const
{
if (!m_prop.is_visible) {
return false;
}
getCollisionBox(toset);
return true;
}

2
src/content_sao.h
View File

@ -127,6 +127,7 @@ public:
bool select_horiz_by_yawpitch);
std::string getName();
bool getCollisionBox(aabb3f *toset) const;
bool getSelectionBox(aabb3f *toset) const;
bool collideWithObjects() const;
private:
std::string getPropertyPacket();
@ -357,6 +358,7 @@ public:
}
bool getCollisionBox(aabb3f *toset) const;
bool getSelectionBox(aabb3f *toset) const;
bool collideWithObjects() const { return true; }
void finalize(RemotePlayer *player, const std::set<std::string> &privs);

174
src/environment.cpp
View File

@ -20,6 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <fstream>
#include "environment.h"
#include "collision.h"
#include "raycast.h"
#include "serverobject.h"
#include "scripting_server.h"
#include "server.h"
@ -83,6 +84,179 @@ float Environment::getTimeOfDayF()
return m_time_of_day_f;
}
/*
Check if a node is pointable
*/
inline static bool isPointableNode(const MapNode &n,
INodeDefManager *nodedef , bool liquids_pointable)
{
const ContentFeatures &features = nodedef->get(n);
return features.pointable ||
(liquids_pointable && features.isLiquid());
}
void Environment::continueRaycast(RaycastState *state, PointedThing *result)
{
INodeDefManager *nodedef = getMap().getNodeDefManager();
if (state->m_initialization_needed) {
// Add objects
if (state->m_objects_pointable) {
std::vector<PointedThing> found;
getSelectedActiveObjects(state->m_shootline, found);
for (std::vector<PointedThing>::iterator pointed = found.begin();
pointed != found.end(); ++pointed) {
state->m_found.push(*pointed);
}
}
// Set search range
core::aabbox3d<s16> maximal_exceed = nodedef->getSelectionBoxIntUnion();
state->m_search_range.MinEdge = -maximal_exceed.MaxEdge;
state->m_search_range.MaxEdge = -maximal_exceed.MinEdge;
// Setting is done
state->m_initialization_needed = false;
}
// The index of the first pointed thing that was not returned
// before. The last index which needs to be tested.
s16 lastIndex = state->m_iterator.m_last_index;
if (!state->m_found.empty()) {
lastIndex = state->m_iterator.getIndex(
floatToInt(state->m_found.top().intersection_point, BS));
}
Map &map = getMap();
// If a node is found, this is the center of the
// first nodebox the shootline meets.
v3f found_boxcenter(0, 0, 0);
// The untested nodes are in this range.
core::aabbox3d<s16> new_nodes;
while (state->m_iterator.m_current_index <= lastIndex) {
// Test the nodes around the current node in search_range.
new_nodes = state->m_search_range;
new_nodes.MinEdge += state->m_iterator.m_current_node_pos;
new_nodes.MaxEdge += state->m_iterator.m_current_node_pos;
// Only check new nodes
v3s16 delta = state->m_iterator.m_current_node_pos
- state->m_previous_node;
if (delta.X > 0) {
new_nodes.MinEdge.X = new_nodes.MaxEdge.X;
} else if (delta.X < 0) {
new_nodes.MaxEdge.X = new_nodes.MinEdge.X;
} else if (delta.Y > 0) {
new_nodes.MinEdge.Y = new_nodes.MaxEdge.Y;
} else if (delta.Y < 0) {
new_nodes.MaxEdge.Y = new_nodes.MinEdge.Y;
} else if (delta.Z > 0) {
new_nodes.MinEdge.Z = new_nodes.MaxEdge.Z;
} else if (delta.Z < 0) {
new_nodes.MaxEdge.Z = new_nodes.MinEdge.Z;
}
// For each untested node
for (s16 x = new_nodes.MinEdge.X; x <= new_nodes.MaxEdge.X; x++)
for (s16 y = new_nodes.MinEdge.Y; y <= new_nodes.MaxEdge.Y; y++)
for (s16 z = new_nodes.MinEdge.Z; z <= new_nodes.MaxEdge.Z; z++) {
MapNode n;
v3s16 np(x, y, z);
bool is_valid_position;
n = map.getNodeNoEx(np, &is_valid_position);
if (!(is_valid_position && isPointableNode(n, nodedef,
state->m_liquids_pointable))) {
continue;
}
PointedThing result;
std::vector<aabb3f> boxes;
n.getSelectionBoxes(nodedef, &boxes,
n.getNeighbors(np, &map));
// Is there a collision with a selection box?
bool is_colliding = false;
// Minimal distance of all collisions
float min_distance_sq = 10000000;
v3f npf = intToFloat(np, BS);
for (std::vector<aabb3f>::const_iterator i = boxes.begin();
i != boxes.end(); ++i) {
// Get current collision box
aabb3f box = *i;
box.MinEdge += npf;
box.MaxEdge += npf;
v3f intersection_point;
v3s16 intersection_normal;
if (!boxLineCollision(box, state->m_shootline.start,
state->m_shootline.getVector(), &intersection_point,
&intersection_normal))
continue;
f32 distanceSq = (intersection_point
- state->m_shootline.start).getLengthSQ();
// If this is the nearest collision, save it
if (min_distance_sq > distanceSq) {
min_distance_sq = distanceSq;
result.intersection_point = intersection_point;
result.intersection_normal = intersection_normal;
found_boxcenter = box.getCenter();
is_colliding = true;
}
}
// If there wasn't a collision, stop
if (!is_colliding) {
continue;
}
result.type = POINTEDTHING_NODE;
result.node_undersurface = np;
result.distanceSq = min_distance_sq;
// Set undersurface and abovesurface nodes
f32 d = 0.002 * BS;
v3f fake_intersection = result.intersection_point;
// Move intersection towards its source block.
if (fake_intersection.X < found_boxcenter.X) {
fake_intersection.X += d;
} else {
fake_intersection.X -= d;
}
if (fake_intersection.Y < found_boxcenter.Y) {
fake_intersection.Y += d;
} else {
fake_intersection.Y -= d;
}
if (fake_intersection.Z < found_boxcenter.Z) {
fake_intersection.Z += d;
} else {
fake_intersection.Z -= d;
}
result.node_real_undersurface = floatToInt(
fake_intersection, BS);
result.node_abovesurface = result.node_real_undersurface
+ result.intersection_normal;
// Push found PointedThing
state->m_found.push(result);
// If this is nearer than the old nearest object,
// the search can be shorter
s16 newIndex = state->m_iterator.getIndex(
result.node_real_undersurface);
if (newIndex < lastIndex) {
lastIndex = newIndex;
}
}
// Next node
state->m_previous_node = state->m_iterator.m_current_node_pos;
state->m_iterator.next();
}
// Return empty PointedThing if nothing left on the ray
if (state->m_found.empty()) {
result->type = POINTEDTHING_NOTHING;
} else {
*result = state->m_found.top();
state->m_found.pop();
}
}
void Environment::stepTimeOfDay(float dtime)
{
MutexAutoLock lock(this->m_time_lock);

22
src/environment.h
View File

@ -42,6 +42,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
class IGameDef;
class Map;
struct PointedThing;
class RaycastState;
class Environment
{
@ -76,6 +78,26 @@ public:
u32 getDayCount();
/*!
* Gets the objects pointed by the shootline as
* pointed things.
* If this is a client environment, the local player
* won't be returned.
* @param[in] shootline_on_map the shootline for
* the test in world coordinates
*
* @param[out] objects found objects
*/
virtual void getSelectedActiveObjects(const core::line3d<f32> &shootline_on_map,
std::vector<PointedThing> &objects) = 0;
/*!
* Returns the next node or object the shootline meets.
* @param state current state of the raycast
* @result output, will contain the next pointed thing
*/
void continueRaycast(RaycastState *state, PointedThing *result);
// counter used internally when triggering ABMs
u32 m_added_objects;

27
src/game.cpp
View File

@ -50,6 +50,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "particles.h"
#include "profiler.h"
#include "quicktune_shortcutter.h"
#include "raycast.h"
#include "server.h"
#include "settings.h"
#include "sky.h"
@ -3667,28 +3668,22 @@ PointedThing Game::updatePointedThing(
static thread_local const bool show_entity_selectionbox = g_settings->getBool(
"show_entity_selectionbox");
ClientMap &map = client->getEnv().getClientMap();
INodeDefManager *nodedef=client->getNodeDefManager();
ClientEnvironment &env = client->getEnv();
ClientMap &map = env.getClientMap();
INodeDefManager *nodedef = map.getNodeDefManager();
runData.selected_object = NULL;
PointedThing result=client->getEnv().getPointedThing(
shootline, liquids_pointable, look_for_object);
RaycastState s(shootline, look_for_object, liquids_pointable);
PointedThing result;
env.continueRaycast(&s, &result);
if (result.type == POINTEDTHING_OBJECT) {
runData.selected_object = client->getEnv().getActiveObject(result.object_id);
if (show_entity_selectionbox && runData.selected_object->doShowSelectionBox()) {
aabb3f *selection_box = runData.selected_object->getSelectionBox();
// Box should exist because object was
// returned in the first place
assert(selection_box);
aabb3f selection_box;
if (show_entity_selectionbox && runData.selected_object->doShowSelectionBox() &&
runData.selected_object->getSelectionBox(&selection_box)) {
v3f pos = runData.selected_object->getPosition();
selectionboxes->push_back(aabb3f(
selection_box->MinEdge, selection_box->MaxEdge));
selectionboxes->push_back(
aabb3f(selection_box->MinEdge, selection_box->MaxEdge));
selectionboxes->push_back(aabb3f(selection_box));
hud->setSelectionPos(pos, camera_offset);
}
} else if (result.type == POINTEDTHING_NODE) {

38
src/raycast.cpp
View File

@ -17,11 +17,47 @@ with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "raycast.h"
#include "irr_v3d.h"
#include "irr_aabb3d.h"
#include "constants.h"
bool RaycastSort::operator() (const PointedThing &pt1,
const PointedThing &pt2) const
{
// "nothing" can not be sorted
assert(pt1.type != POINTEDTHING_NOTHING);
assert(pt2.type != POINTEDTHING_NOTHING);
// returns false if pt1 is nearer than pt2
if (pt1.distanceSq < pt2.distanceSq) {
return false;
} else if (pt1.distanceSq == pt2.distanceSq) {
// Sort them to allow only one order
if (pt1.type == POINTEDTHING_OBJECT)
return (pt2.type == POINTEDTHING_OBJECT
&& pt1.object_id < pt2.object_id);
else
return (pt2.type == POINTEDTHING_OBJECT
|| pt1.node_undersurface < pt2.node_undersurface);
}
return true;
}
RaycastState::RaycastState(const core::line3d<f32> &shootline,
bool objects_pointable, bool liquids_pointable) :
m_shootline(shootline),
m_iterator(shootline.start / BS, shootline.getVector() / BS),
m_previous_node(m_iterator.m_current_node_pos),
m_objects_pointable(objects_pointable),
m_liquids_pointable(liquids_pointable)
{
}
bool boxLineCollision(const aabb3f &box, const v3f &start,
const v3f &dir, v3f *collision_point, v3s16 *collision_normal) {
const v3f &dir, v3f *collision_point, v3s16 *collision_normal)
{
if (box.isPointInside(start)) {
*collision_point = start;
collision_normal->set(0, 0, 0);

43
src/raycast.h
View File

@ -20,6 +20,49 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#ifndef SRC_RAYCAST_H_
#define SRC_RAYCAST_H_
#include "voxelalgorithms.h"
#include "util/pointedthing.h"
//! Sorts PointedThings based on their distance.
struct RaycastSort
{
bool operator() (const PointedThing &pt1, const PointedThing &pt2) const;
};
//! Describes the state of a raycast.
class RaycastState
{
public:
/*!
* Creates a raycast.
* @param objects_pointable if false, only nodes will be found
* @param liquids pointable if false, liquid nodes won't be found
*/
RaycastState(const core::line3d<f32> &shootline, bool objects_pointable,
bool liquids_pointable);
//! Shootline of the raycast.
core::line3d<f32> m_shootline;
//! Iterator to store the progress of the raycast.
voxalgo::VoxelLineIterator m_iterator;
//! Previous tested node during the raycast.
v3s16 m_previous_node;
/*!
* This priority queue stores the found pointed things
* waiting to be returned.
*/
std::priority_queue<PointedThing, std::vector<PointedThing>, RaycastSort> m_found;
bool m_objects_pointable;
bool m_liquids_pointable;
//! The code needs to search these nodes around the center node.
core::aabbox3d<s16> m_search_range { 0, 0, 0, 0, 0, 0 };
//! If true, the Environment will initialize this state.
bool m_initialization_needed = true;
};
/*!
* Checks if a line and a box intersects.

1
src/script/cpp_api/s_item.h
View File

@ -52,6 +52,7 @@ public:
protected:
friend class LuaItemStack;
friend class ModApiItemMod;
friend class LuaRaycast;
bool getItemCallback(const char *name, const char *callbackname);
void pushPointedThing(const PointedThing& pointed);

105
src/script/lua_api/l_env.cpp
View File

@ -131,6 +131,105 @@ void LuaLBM::trigger(ServerEnvironment *env, v3s16 p, MapNode n)
lua_pop(L, 1); // Pop error handler
}
int LuaRaycast::l_next(lua_State *L)
{
MAP_LOCK_REQUIRED;
ScriptApiItem *script = getScriptApi<ScriptApiItem>(L);
GET_ENV_PTR;
LuaRaycast *o = checkobject(L, 1);
PointedThing pointed;
env->continueRaycast(&o->state, &pointed);
if (pointed.type == POINTEDTHING_NOTHING)
lua_pushnil(L);
else
script->pushPointedThing(pointed);
return 1;
}
int LuaRaycast::create_object(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
bool objects = true;
bool liquids = false;
v3f pos1 = checkFloatPos(L, 1);
v3f pos2 = checkFloatPos(L, 2);
if (lua_isboolean(L, 3)) {
objects = lua_toboolean(L, 3);
}
if (lua_isboolean(L, 4)) {
liquids = lua_toboolean(L, 4);
}
LuaRaycast *o = new LuaRaycast(core::line3d<f32>(pos1, pos2),
objects, liquids);
*(void **) (lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
LuaRaycast *LuaRaycast::checkobject(lua_State *L, int narg)
{
NO_MAP_LOCK_REQUIRED;
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if (!ud)
luaL_typerror(L, narg, className);
return *(LuaRaycast **) ud;
}
int LuaRaycast::gc_object(lua_State *L)
{
LuaRaycast *o = *(LuaRaycast **) (lua_touserdata(L, 1));
delete o;
return 0;
}
void LuaRaycast::Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pushliteral(L, "__call");
lua_pushcfunction(L, l_next);
lua_settable(L, metatable);
lua_pop(L, 1);
luaL_openlib(L, 0, methods, 0);
lua_pop(L, 1);
lua_register(L, className, create_object);
}
const char LuaRaycast::className[] = "Raycast";
const luaL_Reg LuaRaycast::methods[] =
{
luamethod(LuaRaycast, next),
{ 0, 0 }
};
void LuaEmergeAreaCallback(v3s16 blockpos, EmergeAction action, void *param)
{
ScriptCallbackState *state = (ScriptCallbackState *)param;
@ -904,6 +1003,11 @@ int ModApiEnvMod::l_fix_light(lua_State *L)
return 1;
}
int ModApiEnvMod::l_raycast(lua_State *L)
{
return LuaRaycast::create_object(L);
}
// emerge_area(p1, p2, [callback, context])
// emerge mapblocks in area p1..p2, calls callback with context upon completion
int ModApiEnvMod::l_emerge_area(lua_State *L)
@ -1155,6 +1259,7 @@ void ModApiEnvMod::Initialize(lua_State *L, int top)
API_FCT(spawn_tree);
API_FCT(find_path);
API_FCT(line_of_sight);
API_FCT(raycast);
API_FCT(transforming_liquid_add);
API_FCT(forceload_block);
API_FCT(forceload_free_block);

45
src/script/lua_api/l_env.h
View File

@ -22,6 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "lua_api/l_base.h"
#include "serverenvironment.h"
#include "raycast.h"
class ModApiEnvMod : public ModApiBase {
private:
@ -159,6 +160,9 @@ private:
// line_of_sight(pos1, pos2, stepsize) -> true/false
static int l_line_of_sight(lua_State *L);
// raycast(pos1, pos2, objects, liquids) -> Raycast
static int l_raycast(lua_State *L);
// find_path(pos1, pos2, searchdistance,
// max_jump, max_drop, algorithm) -> table containing path
static int l_find_path(lua_State *L);
@ -245,6 +249,47 @@ public:
virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n);
};
//! Lua wrapper for RaycastState objects
class LuaRaycast : public ModApiBase
{
private:
static const char className[];
static const luaL_Reg methods[];
//! Inner state
RaycastState state;
// Exported functions
// garbage collector
static int gc_object(lua_State *L);
/*!
* Raycast:next() -> pointed_thing
* Returns the next pointed thing on the ray.
*/
static int l_next(lua_State *L);
public:
//! Constructor with the same arguments as RaycastState.
LuaRaycast(
const core::line3d<f32> &shootline,
bool objects_pointable,
bool liquids_pointable) :
state(shootline, objects_pointable, liquids_pointable)
{}
//! Creates a LuaRaycast and leaves it on top of the stack.
static int create_object(lua_State *L);
/*!
* Returns the Raycast from the stack or throws an error.
* @param narg location of the RaycastState in the stack
*/
static LuaRaycast *checkobject(lua_State *L, int narg);
//! Registers Raycast as a Lua userdata type.
static void Register(lua_State *L);
};
struct ScriptCallbackState {
ServerScripting *script;
int callback_ref;

1
src/script/scripting_server.cpp
View File

@ -92,6 +92,7 @@ void ServerScripting::InitializeModApi(lua_State *L, int top)
LuaPerlinNoiseMap::Register(L);
LuaPseudoRandom::Register(L);
LuaPcgRandom::Register(L);
LuaRaycast::Register(L);
LuaSecureRandom::Register(L);
LuaVoxelManip::Register(L);
NodeMetaRef::Register(L);

33
src/serverenvironment.cpp
View File

@ -30,7 +30,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "remoteplayer.h"
#include "scripting_server.h"
#include "server.h"
#include "voxelalgorithms.h"
#include "util/serialize.h"
#include "util/basic_macros.h"
#include "util/pointedthing.h"
@ -1662,6 +1661,38 @@ ActiveObjectMessage ServerEnvironment::getActiveObjectMessage()
return message;
}
void ServerEnvironment::getSelectedActiveObjects(
const core::line3d<f32> &shootline_on_map,
std::vector<PointedThing> &objects)
{
std::vector<u16> objectIds;
getObjectsInsideRadius(objectIds, shootline_on_map.start,
shootline_on_map.getLength() + 10.0f);
const v3f line_vector = shootline_on_map.getVector();
for (u32 i = 0; i < objectIds.size(); i++) {
ServerActiveObject* obj = getActiveObject(objectIds[i]);
aabb3f selection_box;
if (!obj->getSelectionBox(&selection_box))
continue;
v3f pos = obj->getBasePosition();
aabb3f offsetted_box(selection_box.MinEdge + pos,
selection_box.MaxEdge + pos);
v3f current_intersection;
v3s16 current_normal;
if (boxLineCollision(offsetted_box, shootline_on_map.start, line_vector,
&current_intersection, &current_normal)) {
objects.push_back(PointedThing(
(s16) objectIds[i], current_intersection, current_normal,
(current_intersection - shootline_on_map.start).getLengthSQ()));
}
}
}
/*
************ Private methods *************
*/

5
src/serverenvironment.h
View File

@ -284,6 +284,11 @@ public:
*/
ActiveObjectMessage getActiveObjectMessage();
virtual void getSelectedActiveObjects(
const core::line3d<f32> &shootline_on_map,
std::vector<PointedThing> &objects
);
/*
Activate objects and dynamically modify for the dtime determined
from timestamp and additional_dtime

46
src/util/pointedthing.cpp
View File

@ -23,20 +23,47 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "../exceptions.h"
#include <sstream>
PointedThing::PointedThing(const v3s16 &under, const v3s16 &above,
const v3s16 &real_under, const v3f &point, const v3s16 &normal,
f32 distSq):
type(POINTEDTHING_NODE),
node_undersurface(under),
node_abovesurface(above),
node_real_undersurface(real_under),
intersection_point(point),
intersection_normal(normal),
distanceSq(distSq)
{}
PointedThing::PointedThing(s16 id, const v3f &point, const v3s16 &normal,
f32 distSq) :
type(POINTEDTHING_OBJECT),
object_id(id),
intersection_point(point),
intersection_normal(normal),
distanceSq(distSq)
{}
std::string PointedThing::dump() const
{
std::ostringstream os(std::ios::binary);
if (type == POINTEDTHING_NOTHING) {
os<<"[nothing]";
} else if (type == POINTEDTHING_NODE) {
switch (type) {
case POINTEDTHING_NOTHING:
os << "[nothing]";
break;
case POINTEDTHING_NODE:
{
const v3s16 &u = node_undersurface;
const v3s16 &a = node_abovesurface;
os<<"[node under="<<u.X<<","<<u.Y<<","<<u.Z
<< " above="<<a.X<<","<<a.Y<<","<<a.Z<<"]";
} else if (type == POINTEDTHING_OBJECT) {
os<<"[object "<<object_id<<"]";
} else {
os<<"[unknown PointedThing]";
os << "[node under=" << u.X << "," << u.Y << "," << u.Z << " above="
<< a.X << "," << a.Y << "," << a.Z << "]";
}
break;
case POINTEDTHING_OBJECT:
os << "[object " << object_id << "]";
break;
default:
os << "[unknown PointedThing]";
}
return os.str();
}
@ -104,4 +131,3 @@ bool PointedThing::operator!=(const PointedThing &pt2) const
{
return !(*this == pt2);
}

18
src/util/pointedthing.h
View File

@ -58,6 +58,11 @@ struct PointedThing
* point of the collision and the nodebox of the node.
*/
v3s16 node_real_undersurface;
/*!
* Only valid if type is POINTEDTHING_OBJECT.
* The ID of the object the ray hit.
*/
s16 object_id = -1;
/*!
* Only valid if type isn't POINTEDTHING_NONE.
* First intersection point of the ray and the nodebox.
@ -71,12 +76,19 @@ struct PointedThing
*/
v3s16 intersection_normal;
/*!
* Only valid if type is POINTEDTHING_OBJECT.
* The ID of the object the ray hit.
* Square of the distance between the pointing
* ray's start point and the intersection point.
*/
s16 object_id = -1;
f32 distanceSq = 0;
//! Constructor for POINTEDTHING_NOTHING
PointedThing() {};
//! Constructor for POINTEDTHING_NODE
PointedThing(const v3s16 &under, const v3s16 &above,
const v3s16 &real_under, const v3f &point, const v3s16 &normal,
f32 distSq);
//! Constructor for POINTEDTHING_OBJECT
PointedThing(s16 id, const v3f &point, const v3s16 &normal, f32 distSq);
std::string dump() const;
void serialize(std::ostream &os) const;
void deSerialize(std::istream &is);

16
src/voxelalgorithms.cpp
View File

@ -1407,6 +1407,8 @@ VoxelLineIterator::VoxelLineIterator(const v3f &start_position, const v3f &line_
m_line_vector(line_vector)
{
m_current_node_pos = floatToInt(m_start_position, 1);
m_start_node_pos = m_current_node_pos;
m_last_index = getIndex(floatToInt(start_position + line_vector, 1));
if (m_line_vector.X > 0) {
m_next_intersection_multi.X = (floorf(m_start_position.X - 0.5) + 1.5
@ -1440,14 +1442,11 @@ VoxelLineIterator::VoxelLineIterator(const v3f &start_position, const v3f &line_
m_intersection_multi_inc.Z = -1 / m_line_vector.Z;
m_step_directions.Z = -1;
}
m_has_next = (m_next_intersection_multi.X <= 1)
|| (m_next_intersection_multi.Y <= 1)
|| (m_next_intersection_multi.Z <= 1);
}
void VoxelLineIterator::next()
{
m_current_index++;
if ((m_next_intersection_multi.X < m_next_intersection_multi.Y)
&& (m_next_intersection_multi.X < m_next_intersection_multi.Z)) {
m_next_intersection_multi.X += m_intersection_multi_inc.X;
@ -1459,10 +1458,13 @@ void VoxelLineIterator::next()
m_next_intersection_multi.Z += m_intersection_multi_inc.Z;
m_current_node_pos.Z += m_step_directions.Z;
}
}
m_has_next = (m_next_intersection_multi.X <= 1)
|| (m_next_intersection_multi.Y <= 1)
|| (m_next_intersection_multi.Z <= 1);
s16 VoxelLineIterator::getIndex(v3s16 voxel){
return
abs(voxel.X - m_start_node_pos.X) +
abs(voxel.Y - m_start_node_pos.Y) +
abs(voxel.Z - m_start_node_pos.Z);
}
} // namespace voxalgo

27
src/voxelalgorithms.h
View File

@ -123,21 +123,25 @@ public:
* which multiplying the line's vector gives a vector that ends
* on the intersection of two nodes.
*/
v3f m_next_intersection_multi = v3f(10000.0f, 10000.0f, 10000.0f);
v3f m_next_intersection_multi { 10000.0f, 10000.0f, 10000.0f };
/*!
* Each component stores the smallest positive number, by which
* m_next_intersection_multi's components can be increased.
*/
v3f m_intersection_multi_inc = v3f(10000.0f, 10000.0f, 10000.0f);
v3f m_intersection_multi_inc { 10000.0f, 10000.0f, 10000.0f };
/*!
* Direction of the line. Each component can be -1 or 1 (if a
* component of the line's vector is 0, then there will be 1).
*/
v3s16 m_step_directions = v3s16(1, 1, 1);
v3s16 m_step_directions { 1, 1, 1 };
//! Position of the current node.
v3s16 m_current_node_pos;
//! If true, the next node will intersect the line, too.
bool m_has_next;
//! Index of the current node
s16 m_current_index = 0;
//! Position of the start node.
v3s16 m_start_node_pos;
//! Index of the last node
s16 m_last_index;
/*!
* Creates a voxel line iterator with the given line.
@ -161,7 +165,18 @@ public:
/*!
* Returns true if the next voxel intersects the given line.
*/
inline bool hasNext() const { return m_has_next; }
inline bool hasNext() const
{
return m_current_index < m_last_index;
}
/*!
* Returns how many times next() must be called until
* voxel==m_current_node_pos.
* If voxel does not intersect with the line,
* the result is undefined.
*/
s16 getIndex(v3s16 voxel);
};
} // namespace voxalgo