collisionMoveResult collisionMovePrecise(Map *map, IGameDef *gamedef,
f32 pos_max_d, const core::aabbox3d<f32> &box_0,
f32 dtime, v3f &pos_f, v3f &speed_f)
{
collisionMoveResult final_result;
// Maximum time increment (for collision detection etc)
// time = distance / speed
f32 dtime_max_increment = pos_max_d / speed_f.getLength();
// Maximum time increment is 10ms or lower
if(dtime_max_increment > 0.01)
dtime_max_increment = 0.01;
// Don't allow overly huge dtime
if(dtime > 2.0)
dtime = 2.0;
f32 dtime_downcount = dtime;
u32 loopcount = 0;
do
{
loopcount++;
f32 dtime_part;
if(dtime_downcount > dtime_max_increment)
{
dtime_part = dtime_max_increment;
dtime_downcount -= dtime_part;
}
else
{
dtime_part = dtime_downcount;
/*
Setting this to 0 (no -=dtime_part) disables an infinite loop
when dtime_part is so small that dtime_downcount -= dtime_part
does nothing
*/
dtime_downcount = 0;
}
collisionMoveResult result = collisionMoveSimple(map, gamedef,
pos_max_d, box_0, dtime_part, pos_f, speed_f);
if(result.touching_ground)
final_result.touching_ground = true;
if(result.collides)
final_result.collides = true;
}
while(dtime_downcount > 0.001);
return final_result;
}
collisionMoveResult collisionMoveSimple(Environment *env, IGameDef *gamedef,
f32 pos_max_d, const aabb3f &box_0,
f32 stepheight, f32 dtime,
v3f &pos_f, v3f &speed_f,
v3f &accel_f,ActiveObject* self,
bool collideWithObjects)
{
Map *map = &env->getMap();
//TimeTaker tt("collisionMoveSimple");
//ScopeProfiler sp(g_profiler, "collisionMoveSimple avg", SPT_AVG);
collisionMoveResult result;
/*
Calculate new velocity
*/
if( dtime > 1 ) {
/*
infostream<<"collisionMoveSimple: WARNING: maximum step interval exceeded, lost movement details!"<<std::endl;
*/
dtime = 1;
}
speed_f += accel_f * dtime;
// If there is no speed, there are no collisions
if(speed_f.getLength() == 0)
return result;
// Limit speed for avoiding hangs
speed_f.Y=rangelim(speed_f.Y,-1000,1000);
speed_f.X=rangelim(speed_f.X,-1000,1000);
speed_f.Z=rangelim(speed_f.Z,-1000,1000);
/*
Collect node boxes in movement range
*/
std::vector<aabb3f> cboxes;
std::vector<bool> is_unloaded;
std::vector<bool> is_step_up;
std::vector<bool> is_object;
std::vector<int> bouncy_values;
std::vector<v3s16> node_positions;
{
//TimeTaker tt2("collisionMoveSimple collect boxes");
//ScopeProfiler sp(g_profiler, "collisionMoveSimple collect boxes avg", SPT_AVG);
v3s16 oldpos_i = floatToInt(pos_f, BS);
v3s16 newpos_i = floatToInt(pos_f + speed_f * dtime, BS);
s16 min_x = MYMIN(oldpos_i.X, newpos_i.X) + (box_0.MinEdge.X / BS) - 1;
s16 min_y = MYMIN(oldpos_i.Y, newpos_i.Y) + (box_0.MinEdge.Y / BS) - 1;
s16 min_z = MYMIN(oldpos_i.Z, newpos_i.Z) + (box_0.MinEdge.Z / BS) - 1;
s16 max_x = MYMAX(oldpos_i.X, newpos_i.X) + (box_0.MaxEdge.X / BS) + 1;
s16 max_y = MYMAX(oldpos_i.Y, newpos_i.Y) + (box_0.MaxEdge.Y / BS) + 1;
s16 max_z = MYMAX(oldpos_i.Z, newpos_i.Z) + (box_0.MaxEdge.Z / BS) + 1;
for(s16 x = min_x; x <= max_x; x++)
for(s16 y = min_y; y <= max_y; y++)
for(s16 z = min_z; z <= max_z; z++)
{
v3s16 p(x,y,z);
bool is_position_valid;
MapNode n = map->getNodeNoEx(p, &is_position_valid);
if (is_position_valid) {
// Object collides into walkable nodes
const ContentFeatures &f = gamedef->getNodeDefManager()->get(n);
if(f.walkable == false)
continue;
int n_bouncy_value = itemgroup_get(f.groups, "bouncy");
std::vector<aabb3f> nodeboxes = n.getCollisionBoxes(gamedef->ndef());
for(std::vector<aabb3f>::iterator
i = nodeboxes.begin();
i != nodeboxes.end(); ++i)
{
aabb3f box = *i;
box.MinEdge += v3f(x, y, z)*BS;
box.MaxEdge += v3f(x, y, z)*BS;
cboxes.push_back(box);
is_unloaded.push_back(false);
is_step_up.push_back(false);
bouncy_values.push_back(n_bouncy_value);
node_positions.push_back(p);
is_object.push_back(false);
}
}
else {
// Collide with unloaded nodes
aabb3f box = getNodeBox(p, BS);
cboxes.push_back(box);
is_unloaded.push_back(true);
is_step_up.push_back(false);
bouncy_values.push_back(0);
node_positions.push_back(p);
is_object.push_back(false);
}
}
} // tt2
if(collideWithObjects)
{
//ScopeProfiler sp(g_profiler, "collisionMoveSimple objects avg", SPT_AVG);
//TimeTaker tt3("collisionMoveSimple collect object boxes");
/* add object boxes to cboxes */
std::vector<ActiveObject*> objects;
#ifndef SERVER
ClientEnvironment *c_env = dynamic_cast<ClientEnvironment*>(env);
if (c_env != 0) {
f32 distance = speed_f.getLength();
std::vector<DistanceSortedActiveObject> clientobjects;
c_env->getActiveObjects(pos_f,distance * 1.5,clientobjects);
for (size_t i=0; i < clientobjects.size(); i++) {
if ((self == 0) || (self != clientobjects[i].obj)) {
objects.push_back((ActiveObject*)clientobjects[i].obj);
}
}
}
else
#endif
{
ServerEnvironment *s_env = dynamic_cast<ServerEnvironment*>(env);
if (s_env != 0) {
f32 distance = speed_f.getLength();
std::vector<u16> s_objects;
s_env->getObjectsInsideRadius(s_objects, pos_f, distance * 1.5);
for (std::vector<u16>::iterator iter = s_objects.begin(); iter != s_objects.end(); ++iter) {
ServerActiveObject *current = s_env->getActiveObject(*iter);
if ((self == 0) || (self != current)) {
objects.push_back((ActiveObject*)current);
}
}
}
}
for (std::vector<ActiveObject*>::const_iterator iter = objects.begin();
iter != objects.end(); ++iter) {
ActiveObject *object = *iter;
if (object != NULL) {
aabb3f object_collisionbox;
if (object->getCollisionBox(&object_collisionbox) &&
object->collideWithObjects()) {
cboxes.push_back(object_collisionbox);
is_unloaded.push_back(false);
is_step_up.push_back(false);
bouncy_values.push_back(0);
node_positions.push_back(v3s16(0,0,0));
is_object.push_back(true);
}
}
}
} //tt3
/*
assert(cboxes.size() == is_unloaded.size()); // post-condition
assert(cboxes.size() == is_step_up.size()); // post-condition
assert(cboxes.size() == bouncy_values.size()); // post-condition
assert(cboxes.size() == node_positions.size()); // post-condition
assert(cboxes.size() == is_object.size()); // post-condition
*/
/*
Collision detection
*/
/*
Collision uncertainty radius
Make it a bit larger than the maximum distance of movement
*/
f32 d = pos_max_d * 1.1;
// A fairly large value in here makes moving smoother
//f32 d = 0.15*BS;
// This should always apply, otherwise there are glitches
if(!(d > pos_max_d))
return result;
int loopcount = 0;
while(dtime > BS*1e-10)
{
//TimeTaker tt3("collisionMoveSimple dtime loop");
//ScopeProfiler sp(g_profiler, "collisionMoveSimple dtime loop avg", SPT_AVG);
// Avoid infinite loop
loopcount++;
if(loopcount >= 100)
{
infostream<<"collisionMoveSimple: WARNING: Loop count exceeded, aborting to avoid infiniite loop"<<std::endl;
dtime = 0;
break;
}
aabb3f movingbox = box_0;
movingbox.MinEdge += pos_f;
movingbox.MaxEdge += pos_f;
int nearest_collided = -1;
f32 nearest_dtime = dtime;
u32 nearest_boxindex = -1;
/*
Go through every nodebox, find nearest collision
*/
for(u32 boxindex = 0; boxindex < cboxes.size(); boxindex++)
{
// Ignore if already stepped up this nodebox.
if(is_step_up[boxindex])
continue;
// Find nearest collision of the two boxes (raytracing-like)
f32 dtime_tmp;
int collided = axisAlignedCollision(
cboxes[boxindex], movingbox, speed_f, d, dtime_tmp);
if(collided == -1 || dtime_tmp >= nearest_dtime)
continue;
nearest_dtime = dtime_tmp;
nearest_collided = collided;
nearest_boxindex = boxindex;
}
if(nearest_collided == -1)
{
// No collision with any collision box.
pos_f += speed_f * dtime;
dtime = 0; // Set to 0 to avoid "infinite" loop due to small FP numbers
}
else
{
// Otherwise, a collision occurred.
const aabb3f& cbox = cboxes[nearest_boxindex];
// Check for stairs.
bool step_up = (nearest_collided != 1) && // must not be Y direction
(movingbox.MinEdge.Y < cbox.MaxEdge.Y) &&
(movingbox.MinEdge.Y + stepheight > cbox.MaxEdge.Y) &&
(!wouldCollideWithCeiling(cboxes, movingbox,
cbox.MaxEdge.Y - movingbox.MinEdge.Y,
d));
// Get bounce multiplier
bool bouncy = (bouncy_values[nearest_boxindex] >= 1);
float bounce = -(float)bouncy_values[nearest_boxindex] / 100.0;
// Move to the point of collision and reduce dtime by nearest_dtime
if(nearest_dtime < 0)
{
// Handle negative nearest_dtime (can be caused by the d allowance)
if(!step_up)
{
if(nearest_collided == 0)
pos_f.X += speed_f.X * nearest_dtime;
if(nearest_collided == 1)
pos_f.Y += speed_f.Y * nearest_dtime;
if(nearest_collided == 2)
pos_f.Z += speed_f.Z * nearest_dtime;
}
}
else
{
pos_f += speed_f * nearest_dtime;
dtime -= nearest_dtime;
}
bool is_collision = true;
if(is_unloaded[nearest_boxindex])
is_collision = false;
CollisionInfo info;
if (is_object[nearest_boxindex]) {
info.type = COLLISION_OBJECT;
}
else {
info.type = COLLISION_NODE;
}
info.node_p = node_positions[nearest_boxindex];
info.bouncy = bouncy;
info.old_speed = speed_f;
// Set the speed component that caused the collision to zero
if(step_up)
{
// Special case: Handle stairs
is_step_up[nearest_boxindex] = true;
is_collision = false;
}
else if(nearest_collided == 0) // X
{
if(fabs(speed_f.X) > BS*3)
speed_f.X *= bounce;
else
speed_f.X = 0;
result.collides = true;
result.collides_xz = true;
}
else if(nearest_collided == 1) // Y
{
if(fabs(speed_f.Y) > BS*3)
speed_f.Y *= bounce;
else
speed_f.Y = 0;
result.collides = true;
}
else if(nearest_collided == 2) // Z
{
if(fabs(speed_f.Z) > BS*3)
speed_f.Z *= bounce;
else
speed_f.Z = 0;
result.collides = true;
result.collides_xz = true;
}
info.new_speed = speed_f;
if(info.new_speed.getDistanceFrom(info.old_speed) < 0.1*BS)
is_collision = false;
if(is_collision){
result.collisions.push_back(info);
}
}
}
/*
Final touches: Check if standing on ground, step up stairs.
*/
aabb3f box = box_0;
box.MinEdge += pos_f;
box.MaxEdge += pos_f;
for(u32 boxindex = 0; boxindex < cboxes.size(); boxindex++)
{
const aabb3f& cbox = cboxes[boxindex];
/*
See if the object is touching ground.
Object touches ground if object's minimum Y is near node's
maximum Y and object's X-Z-area overlaps with the node's
X-Z-area.
Use 0.15*BS so that it is easier to get on a node.
*/
if(
cbox.MaxEdge.X-d > box.MinEdge.X &&
cbox.MinEdge.X+d < box.MaxEdge.X &&
cbox.MaxEdge.Z-d > box.MinEdge.Z &&
cbox.MinEdge.Z+d < box.MaxEdge.Z
){
if(is_step_up[boxindex])
{
pos_f.Y += (cbox.MaxEdge.Y - box.MinEdge.Y);
box = box_0;
box.MinEdge += pos_f;
box.MaxEdge += pos_f;
}
if(fabs(cbox.MaxEdge.Y-box.MinEdge.Y) < 0.15*BS)
{
result.touching_ground = true;
if(is_unloaded[boxindex])
result.standing_on_unloaded = true;
}
}
}
return result;
}
// This doesn't seem to work and isn't used
collisionMoveResult collisionMovePrecise(Map *map, IGameDef *gamedef,
f32 pos_max_d, const aabb3f &box_0,
f32 stepheight, f32 dtime,
v3f &pos_f, v3f &speed_f, v3f &accel_f)
{
//TimeTaker tt("collisionMovePrecise");
ScopeProfiler sp(g_profiler, "collisionMovePrecise avg", SPT_AVG);
collisionMoveResult final_result;
// If there is no speed, there are no collisions
if(speed_f.getLength() == 0)
return final_result;
// Don't allow overly huge dtime
if(dtime > 2.0)
dtime = 2.0;
f32 dtime_downcount = dtime;
u32 loopcount = 0;
do
{
loopcount++;
// Maximum time increment (for collision detection etc)
// time = distance / speed
f32 dtime_max_increment = 1.0;
if(speed_f.getLength() != 0)
dtime_max_increment = pos_max_d / speed_f.getLength();
// Maximum time increment is 10ms or lower
if(dtime_max_increment > 0.01)
dtime_max_increment = 0.01;
f32 dtime_part;
if(dtime_downcount > dtime_max_increment)
{
dtime_part = dtime_max_increment;
dtime_downcount -= dtime_part;
}
else
{
dtime_part = dtime_downcount;
/*
Setting this to 0 (no -=dtime_part) disables an infinite loop
when dtime_part is so small that dtime_downcount -= dtime_part
does nothing
*/
dtime_downcount = 0;
}
collisionMoveResult result = collisionMoveSimple(map, gamedef,
pos_max_d, box_0, stepheight, dtime_part,
pos_f, speed_f, accel_f);
if(result.touching_ground)
final_result.touching_ground = true;
if(result.collides)
final_result.collides = true;
if(result.collides_xz)
final_result.collides_xz = true;
if(result.standing_on_unloaded)
final_result.standing_on_unloaded = true;
}
while(dtime_downcount > 0.001);
return final_result;
}
collisionMoveResult collisionMoveSimple(Map *map, IGameDef *gamedef,
f32 pos_max_d, const aabb3f &box_0,
f32 stepheight, f32 dtime,
v3f &pos_f, v3f &speed_f, v3f &accel_f)
{
TimeTaker tt("collisionMoveSimple");
collisionMoveResult result;
// If there is no speed, there are no collisions
if(speed_f.getLength() == 0)
return result;
/*
Calculate new velocity
*/
speed_f += accel_f * dtime;
/*
Collect node boxes in movement range
*/
std::vector<aabb3f> cboxes;
std::vector<bool> is_unloaded;
std::vector<bool> is_step_up;
{
TimeTaker tt2("collisionMoveSimple collect boxes");
v3s16 oldpos_i = floatToInt(pos_f, BS);
v3s16 newpos_i = floatToInt(pos_f + speed_f * dtime, BS);
s16 min_x = MYMIN(oldpos_i.X, newpos_i.X) + (box_0.MinEdge.X / BS) - 1;
s16 min_y = MYMIN(oldpos_i.Y, newpos_i.Y) + (box_0.MinEdge.Y / BS) - 1;
s16 min_z = MYMIN(oldpos_i.Z, newpos_i.Z) + (box_0.MinEdge.Z / BS) - 1;
s16 max_x = MYMAX(oldpos_i.X, newpos_i.X) + (box_0.MaxEdge.X / BS) + 1;
s16 max_y = MYMAX(oldpos_i.Y, newpos_i.Y) + (box_0.MaxEdge.Y / BS) + 1;
s16 max_z = MYMAX(oldpos_i.Z, newpos_i.Z) + (box_0.MaxEdge.Z / BS) + 1;
for(s16 x = min_x; x <= max_x; x++)
for(s16 y = min_y; y <= max_y; y++)
for(s16 z = min_z; z <= max_z; z++)
{
try {
// Object collides into walkable nodes
MapNode n = map->getNode(v3s16(x,y,z));
if(gamedef->getNodeDefManager()->get(n).walkable == false)
continue;
std::vector<aabb3f> nodeboxes = n.getNodeBoxes(gamedef->ndef());
for(std::vector<aabb3f>::iterator
i = nodeboxes.begin();
i != nodeboxes.end(); i++)
{
aabb3f box = *i;
box.MinEdge += v3f(x, y, z)*BS;
box.MaxEdge += v3f(x, y, z)*BS;
cboxes.push_back(box);
is_unloaded.push_back(false);
is_step_up.push_back(false);
}
}
catch(InvalidPositionException &e)
{
// Collide with unloaded nodes
aabb3f box = getNodeBox(v3s16(x,y,z), BS);
cboxes.push_back(box);
is_unloaded.push_back(true);
is_step_up.push_back(false);
}
}
} // tt2
assert(cboxes.size() == is_unloaded.size());
assert(cboxes.size() == is_step_up.size());
/*
Collision detection
*/
/*
Collision uncertainty radius
Make it a bit larger than the maximum distance of movement
*/
f32 d = pos_max_d * 1.1;
// A fairly large value in here makes moving smoother
//f32 d = 0.15*BS;
// This should always apply, otherwise there are glitches
assert(d > pos_max_d);
int loopcount = 0;
while(dtime > BS*1e-10)
{
TimeTaker tt3("collisionMoveSimple dtime loop");
// Avoid infinite loop
loopcount++;
if(loopcount >= 100)
{
infostream<<"collisionMoveSimple: WARNING: Loop count exceeded, aborting to avoid infiniite loop"<<std::endl;
dtime = 0;
break;
}
aabb3f movingbox = box_0;
movingbox.MinEdge += pos_f;
movingbox.MaxEdge += pos_f;
int nearest_collided = -1;
f32 nearest_dtime = dtime;
u32 nearest_boxindex = -1;
/*
Go through every nodebox, find nearest collision
*/
for(u32 boxindex = 0; boxindex < cboxes.size(); boxindex++)
{
// Ignore if already stepped up this nodebox.
if(is_step_up[boxindex])
continue;
// Find nearest collision of the two boxes (raytracing-like)
f32 dtime_tmp;
int collided = axisAlignedCollision(
cboxes[boxindex], movingbox, speed_f, d, dtime_tmp);
if(collided == -1 || dtime_tmp >= nearest_dtime)
continue;
nearest_dtime = dtime_tmp;
nearest_collided = collided;
nearest_boxindex = boxindex;
}
if(nearest_collided == -1)
{
// No collision with any collision box.
pos_f += speed_f * dtime;
dtime = 0; // Set to 0 to avoid "infinite" loop due to small FP numbers
}
else
{
// Otherwise, a collision occurred.
const aabb3f& cbox = cboxes[nearest_boxindex];
// Check for stairs.
bool step_up = (nearest_collided != 1) && // must not be Y direction
(movingbox.MinEdge.Y < cbox.MaxEdge.Y) &&
(movingbox.MinEdge.Y + stepheight > cbox.MaxEdge.Y) &&
(!wouldCollideWithCeiling(cboxes, movingbox,
cbox.MaxEdge.Y - movingbox.MinEdge.Y,
d));
// Move to the point of collision and reduce dtime by nearest_dtime
if(nearest_dtime < 0)
{
// Handle negative nearest_dtime (can be caused by the d allowance)
if(!step_up)
{
if(nearest_collided == 0)
pos_f.X += speed_f.X * nearest_dtime;
if(nearest_collided == 1)
pos_f.Y += speed_f.Y * nearest_dtime;
if(nearest_collided == 2)
pos_f.Z += speed_f.Z * nearest_dtime;
}
}
else
{
pos_f += speed_f * nearest_dtime;
dtime -= nearest_dtime;
}
// Set the speed component that caused the collision to zero
if(step_up)
{
// Special case: Handle stairs
is_step_up[nearest_boxindex] = true;
}
else if(nearest_collided == 0) // X
{
speed_f.X = 0;
result.collides = true;
result.collides_xz = true;
}
else if(nearest_collided == 1) // Y
{
speed_f.Y = 0;
result.collides = true;
}
else if(nearest_collided == 2) // Z
{
speed_f.Z = 0;
result.collides = true;
result.collides_xz = true;
}
}
}
/*
Final touches: Check if standing on ground, step up stairs.
*/
aabb3f box = box_0;
box.MinEdge += pos_f;
box.MaxEdge += pos_f;
for(u32 boxindex = 0; boxindex < cboxes.size(); boxindex++)
{
const aabb3f& cbox = cboxes[boxindex];
/*
See if the object is touching ground.
Object touches ground if object's minimum Y is near node's
maximum Y and object's X-Z-area overlaps with the node's
X-Z-area.
Use 0.15*BS so that it is easier to get on a node.
*/
if(
cbox.MaxEdge.X-d > box.MinEdge.X &&
cbox.MinEdge.X+d < box.MaxEdge.X &&
cbox.MaxEdge.Z-d > box.MinEdge.Z &&
cbox.MinEdge.Z+d < box.MaxEdge.Z
) {
if(is_step_up[boxindex])
{
pos_f.Y += (cbox.MaxEdge.Y - box.MinEdge.Y);
box = box_0;
box.MinEdge += pos_f;
box.MaxEdge += pos_f;
}
if(fabs(cbox.MaxEdge.Y-box.MinEdge.Y) < 0.15*BS)
{
result.touching_ground = true;
if(is_unloaded[boxindex])
result.standing_on_unloaded = true;
}
}
}
return result;
}
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;
}