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Expose getPointedThing to Lua

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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
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38
src/raycast.cpp
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@ -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);