69cc759b65
The existing tracing routine for building the PVS was rather simple compared to the main portal tracing, and could not correctly cope with paths that went through multiple portals from room A to B, and as a result would sometimes miss room entries in the PVS resulting in too many culled rooms in these circumstances. This PR adds an improved function that can cope with entering a room multiple times during a trace. As a result it has to take care of portal directions (to prevent going back on itself) in a similar, but not identical way to the main portal tracing routine, and internal rooms, to prevent recursive loops.
74 lines
3.6 KiB
C++
74 lines
3.6 KiB
C++
/*************************************************************************/
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/* portal_pvs_builder.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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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_PVS_BUILDER_H
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#define PORTAL_PVS_BUILDER_H
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#include "core/bitfield_dynamic.h"
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#include "core/local_vector.h"
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#include "core/math/plane.h"
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//#define GODOT_PVS_SUPPORT_SAVE_FILE
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class PortalRenderer;
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class PVS;
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class PVSBuilder {
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struct Neighbours {
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LocalVector<int32_t, int32_t> room_ids;
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};
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public:
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void calculate_pvs(PortalRenderer &p_portal_renderer, String p_filename, int p_depth_limit);
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private:
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#ifdef GODOT_PVS_SUPPORT_SAVE_FILE
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bool load_pvs(String p_filename);
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void save_pvs(String p_filename);
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#endif
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void find_neighbors(LocalVector<Neighbours> &r_neighbors);
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void logd(int p_depth, String p_string);
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void log(String p_string);
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void trace_rooms_recursive(int p_depth, int p_source_room_id, int p_room_id, int p_first_portal_id, bool p_first_portal_outgoing, int p_previous_portal_id, const LocalVector<Plane, int32_t> &p_planes, BitFieldDynamic &r_bitfield_rooms, int p_from_external_room_id = -1);
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void trace_rooms_recursive_simple(int p_depth, int p_source_room_id, int p_room_id, int p_first_portal_id, bool p_first_portal_outgoing, int p_previous_portal_id, const LocalVector<Plane, int32_t> &p_planes, BitFieldDynamic &r_bitfield_rooms);
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void create_secondary_pvs(int p_room_id, const LocalVector<Neighbours> &p_neighbors, BitFieldDynamic &r_bitfield_rooms);
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PortalRenderer *_portal_renderer = nullptr;
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PVS *_pvs = nullptr;
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int _depth_limit = 16;
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Vector3 _trace_start_point;
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static bool _log_active;
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};
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#endif
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