1426cd3b3a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see". Backported from #70885.
106 lines
4.9 KiB
C++
106 lines
4.9 KiB
C++
/**************************************************************************/
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/* portal_rooms_bsp.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef PORTAL_ROOMS_BSP_H
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#define PORTAL_ROOMS_BSP_H
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#include "core/local_vector.h"
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#include "core/math/aabb.h"
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#include "core/math/plane.h"
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class PortalRenderer;
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struct VSPortal;
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struct VSRoom;
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class PortalRoomsBSP {
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struct Node {
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Node() { clear(); }
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void clear() {
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leaf = false;
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child[0] = -1;
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child[1] = -1;
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}
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bool leaf;
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union {
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int32_t child[2];
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struct {
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int32_t first_id;
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int32_t num_ids;
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};
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};
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Plane plane;
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};
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LocalVector<Node, int32_t> _nodes;
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LocalVector<int32_t, int32_t> _room_ids;
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PortalRenderer *_portal_renderer = nullptr;
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const real_t _plane_epsilon = 0.001;
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public:
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// build the BSP on level start
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void create(PortalRenderer &r_portal_renderer);
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// clear data, and ready for a new level
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void clear() {
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_nodes.reset();
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_room_ids.reset();
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}
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// the main function, returns a shortlist of rooms that are possible for a test point
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const int32_t *find_shortlist(const Vector3 &p_pt, int &r_num_rooms) const;
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// This is a 'sticky' function, it prefers to stay in the previous room where possible.
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// This means there is a hysteresis for room choice that may occur if the user creates
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// overlapping rooms...
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int find_room_within(const PortalRenderer &p_portal_renderer, const Vector3 &p_pos, int p_previous_room_id) const;
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private:
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void build(int p_start_node_id, LocalVector<int32_t, int32_t> p_orig_room_ids);
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void detect_internal_room_containment(PortalRenderer &r_portal_renderer);
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int evaluate_portal(int p_portal_id, const LocalVector<int32_t, int32_t> &p_room_ids, LocalVector<int32_t, int32_t> *r_room_ids_back = nullptr, LocalVector<int32_t, int32_t> *r_room_ids_front = nullptr);
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int evaluate_room_split_plane(int p_room_a_id, int p_room_b_id, const LocalVector<int32_t, int32_t> &p_room_ids, Plane &r_plane, LocalVector<int32_t, int32_t> *r_room_ids_back = nullptr, LocalVector<int32_t, int32_t> *r_room_ids_front = nullptr);
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int evaluate_plane(const VSPortal *p_portal, const Plane &p_plane, const LocalVector<int32_t, int32_t> &p_room_ids, LocalVector<int32_t, int32_t> *r_room_ids_back = nullptr, LocalVector<int32_t, int32_t> *r_room_ids_front = nullptr);
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bool calculate_aabb_splitting_plane(const AABB &p_a, const AABB &p_b, Plane &r_plane) const;
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bool calculate_freeform_splitting_plane(const VSRoom &p_room_a, const VSRoom &p_room_b, Plane &r_plane) const;
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bool find_1d_split_point(real_t p_min_a, real_t p_max_a, real_t p_min_b, real_t p_max_b, real_t &r_split_point) const;
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bool test_freeform_plane(const LocalVector<Vector3, int32_t> &p_verts_a, const LocalVector<Vector3, int32_t> &p_verts_b, const Plane &p_plane) const;
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void debug_print_tree(int p_node_id = 0, int p_depth = 0);
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void _log(String p_string);
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};
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#endif // PORTAL_ROOMS_BSP_H
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