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Allow rotating entity selectionboxes (#12379)

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Lars Müller 2022-10-30 16:53:14 +01:00 • committed by GitHub
parent b829231992
commit 077627181e
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 271 additions and 58 deletions
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23
src/raycast.cpp
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@ -20,6 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "raycast.h"
#include "irr_v3d.h"
#include "irr_aabb3d.h"
#include <quaternion.h>
#include "constants.h"
bool RaycastSort::operator() (const PointedThing &pt1,
@ -68,7 +69,7 @@ RaycastState::RaycastState(const core::line3d<f32> &shootline,
bool boxLineCollision(const aabb3f &box, const v3f &start,
const v3f &dir, v3f *collision_point, v3s16 *collision_normal)
const v3f &dir, v3f *collision_point, v3f *collision_normal)
{
if (box.isPointInside(start)) {
*collision_point = start;
@ -135,3 +136,23 @@ bool boxLineCollision(const aabb3f &box, const v3f &start,
}
return false;
}
bool boxLineCollision(const aabb3f &box, const v3f &rotation,
const v3f &start, const v3f &dir,
v3f *collision_point, v3f *collision_normal, v3f *raw_collision_normal)
{
// Inversely transform the ray rather than rotating the box faces;
// this allows us to continue using a simple ray - AABB intersection
core::quaternion rot(rotation * core::DEGTORAD);
rot.makeInverse();
bool collision = boxLineCollision(box, rot * start, rot * dir, collision_point, collision_normal);
if (!collision) return collision;
// Transform the results back
rot.makeInverse();
*collision_point = rot * *collision_point;
*raw_collision_normal = *collision_normal;
*collision_normal = rot * *collision_normal;
return collision;
}