mirror of https://github.com/minetest/minetest.git
1033 lines
30 KiB
C++
1033 lines
30 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "mapblock_mesh.h"
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#include "client.h"
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#include "mapblock.h"
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#include "map.h"
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#include "noise.h"
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#include "profiler.h"
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#include "shader.h"
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#include "mesh.h"
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#include "minimap.h"
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#include "content_mapblock.h"
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#include "util/directiontables.h"
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#include "client/meshgen/collector.h"
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#include "client/renderingengine.h"
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#include <array>
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#include <algorithm>
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#include <cmath>
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/*
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MeshMakeData
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*/
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MeshMakeData::MeshMakeData(const NodeDefManager *ndef, u16 side_length, bool use_shaders):
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side_length(side_length),
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nodedef(ndef),
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m_use_shaders(use_shaders)
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{}
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void MeshMakeData::fillBlockDataBegin(const v3s16 &blockpos)
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{
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m_blockpos = blockpos;
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v3s16 blockpos_nodes = m_blockpos*MAP_BLOCKSIZE;
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m_vmanip.clear();
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VoxelArea voxel_area(blockpos_nodes - v3s16(1,1,1) * MAP_BLOCKSIZE,
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blockpos_nodes + v3s16(1,1,1) * (side_length + MAP_BLOCKSIZE /* extra layer of blocks around the mesh */) - v3s16(1,1,1));
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m_vmanip.addArea(voxel_area);
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}
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void MeshMakeData::fillBlockData(const v3s16 &bp, MapNode *data)
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{
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v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
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VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
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v3s16 blockpos_nodes = bp * MAP_BLOCKSIZE;
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m_vmanip.copyFrom(data, data_area, v3s16(0,0,0), blockpos_nodes, data_size);
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}
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void MeshMakeData::setCrack(int crack_level, v3s16 crack_pos)
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{
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if (crack_level >= 0)
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m_crack_pos_relative = crack_pos - m_blockpos*MAP_BLOCKSIZE;
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}
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void MeshMakeData::setSmoothLighting(bool smooth_lighting)
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{
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m_smooth_lighting = smooth_lighting;
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}
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/*
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Light and vertex color functions
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*/
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/*
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Calculate non-smooth lighting at interior of node.
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Single light bank.
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*/
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static u8 getInteriorLight(enum LightBank bank, MapNode n, s32 increment,
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const NodeDefManager *ndef)
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{
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u8 light = n.getLight(bank, ndef->getLightingFlags(n));
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light = rangelim(light + increment, 0, LIGHT_SUN);
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return decode_light(light);
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}
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/*
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Calculate non-smooth lighting at interior of node.
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Both light banks.
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*/
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u16 getInteriorLight(MapNode n, s32 increment, const NodeDefManager *ndef)
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{
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u16 day = getInteriorLight(LIGHTBANK_DAY, n, increment, ndef);
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u16 night = getInteriorLight(LIGHTBANK_NIGHT, n, increment, ndef);
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return day | (night << 8);
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}
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/*
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Calculate non-smooth lighting at face of node.
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Single light bank.
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*/
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static u8 getFaceLight(enum LightBank bank, MapNode n, MapNode n2, const NodeDefManager *ndef)
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{
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ContentLightingFlags f1 = ndef->getLightingFlags(n);
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ContentLightingFlags f2 = ndef->getLightingFlags(n2);
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u8 light;
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u8 l1 = n.getLight(bank, f1);
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u8 l2 = n2.getLight(bank, f2);
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if(l1 > l2)
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light = l1;
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else
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light = l2;
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// Boost light level for light sources
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u8 light_source = MYMAX(f1.light_source, f2.light_source);
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if(light_source > light)
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light = light_source;
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return decode_light(light);
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}
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/*
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Calculate non-smooth lighting at face of node.
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Both light banks.
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*/
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u16 getFaceLight(MapNode n, MapNode n2, const NodeDefManager *ndef)
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{
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u16 day = getFaceLight(LIGHTBANK_DAY, n, n2, ndef);
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u16 night = getFaceLight(LIGHTBANK_NIGHT, n, n2, ndef);
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return day | (night << 8);
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}
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/*
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Calculate smooth lighting at the XYZ- corner of p.
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Both light banks
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*/
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static u16 getSmoothLightCombined(const v3s16 &p,
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const std::array<v3s16,8> &dirs, MeshMakeData *data)
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{
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const NodeDefManager *ndef = data->nodedef;
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u16 ambient_occlusion = 0;
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u16 light_count = 0;
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u8 light_source_max = 0;
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u16 light_day = 0;
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u16 light_night = 0;
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bool direct_sunlight = false;
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auto add_node = [&] (u8 i, bool obstructed = false) -> bool {
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if (obstructed) {
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ambient_occlusion++;
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return false;
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}
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MapNode n = data->m_vmanip.getNodeNoExNoEmerge(p + dirs[i]);
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if (n.getContent() == CONTENT_IGNORE)
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return true;
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const ContentFeatures &f = ndef->get(n);
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if (f.light_source > light_source_max)
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light_source_max = f.light_source;
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// Check f.solidness because fast-style leaves look better this way
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if (f.param_type == CPT_LIGHT && f.solidness != 2) {
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u8 light_level_day = n.getLight(LIGHTBANK_DAY, f.getLightingFlags());
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u8 light_level_night = n.getLight(LIGHTBANK_NIGHT, f.getLightingFlags());
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if (light_level_day == LIGHT_SUN)
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direct_sunlight = true;
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light_day += decode_light(light_level_day);
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light_night += decode_light(light_level_night);
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light_count++;
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} else {
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ambient_occlusion++;
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}
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return f.light_propagates;
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};
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bool obstructed[4] = { true, true, true, true };
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add_node(0);
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bool opaque1 = !add_node(1);
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bool opaque2 = !add_node(2);
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bool opaque3 = !add_node(3);
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obstructed[0] = opaque1 && opaque2;
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obstructed[1] = opaque1 && opaque3;
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obstructed[2] = opaque2 && opaque3;
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for (u8 k = 0; k < 3; ++k)
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if (add_node(k + 4, obstructed[k]))
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obstructed[3] = false;
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if (add_node(7, obstructed[3])) { // wrap light around nodes
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ambient_occlusion -= 3;
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for (u8 k = 0; k < 3; ++k)
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add_node(k + 4, !obstructed[k]);
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}
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if (light_count == 0) {
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light_day = light_night = 0;
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} else {
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light_day /= light_count;
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light_night /= light_count;
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}
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// boost direct sunlight, if any
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if (direct_sunlight)
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light_day = 0xFF;
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// Boost brightness around light sources
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bool skip_ambient_occlusion_day = false;
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if (decode_light(light_source_max) >= light_day) {
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light_day = decode_light(light_source_max);
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skip_ambient_occlusion_day = true;
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}
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bool skip_ambient_occlusion_night = false;
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if(decode_light(light_source_max) >= light_night) {
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light_night = decode_light(light_source_max);
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skip_ambient_occlusion_night = true;
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}
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if (ambient_occlusion > 4) {
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static thread_local const float ao_gamma = rangelim(
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g_settings->getFloat("ambient_occlusion_gamma"), 0.25, 4.0);
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// Table of gamma space multiply factors.
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static thread_local const float light_amount[3] = {
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powf(0.75, 1.0 / ao_gamma),
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powf(0.5, 1.0 / ao_gamma),
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powf(0.25, 1.0 / ao_gamma)
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};
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//calculate table index for gamma space multiplier
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ambient_occlusion -= 5;
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if (!skip_ambient_occlusion_day)
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light_day = rangelim(core::round32(
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light_day * light_amount[ambient_occlusion]), 0, 255);
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if (!skip_ambient_occlusion_night)
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light_night = rangelim(core::round32(
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light_night * light_amount[ambient_occlusion]), 0, 255);
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}
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return light_day | (light_night << 8);
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}
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/*
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Calculate smooth lighting at the given corner of p.
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Both light banks.
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Node at p is solid, and thus the lighting is face-dependent.
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*/
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u16 getSmoothLightSolid(const v3s16 &p, const v3s16 &face_dir, const v3s16 &corner, MeshMakeData *data)
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{
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return getSmoothLightTransparent(p + face_dir, corner - 2 * face_dir, data);
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}
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/*
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Calculate smooth lighting at the given corner of p.
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Both light banks.
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Node at p is not solid, and the lighting is not face-dependent.
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*/
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u16 getSmoothLightTransparent(const v3s16 &p, const v3s16 &corner, MeshMakeData *data)
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{
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const std::array<v3s16,8> dirs = {{
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// Always shine light
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v3s16(0,0,0),
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v3s16(corner.X,0,0),
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v3s16(0,corner.Y,0),
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v3s16(0,0,corner.Z),
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// Can be obstructed
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v3s16(corner.X,corner.Y,0),
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v3s16(corner.X,0,corner.Z),
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v3s16(0,corner.Y,corner.Z),
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v3s16(corner.X,corner.Y,corner.Z)
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}};
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return getSmoothLightCombined(p, dirs, data);
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}
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void get_sunlight_color(video::SColorf *sunlight, u32 daynight_ratio){
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f32 rg = daynight_ratio / 1000.0f - 0.04f;
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f32 b = (0.98f * daynight_ratio) / 1000.0f + 0.078f;
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sunlight->r = rg;
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sunlight->g = rg;
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sunlight->b = b;
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}
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void final_color_blend(video::SColor *result,
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u16 light, u32 daynight_ratio)
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{
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video::SColorf dayLight;
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get_sunlight_color(&dayLight, daynight_ratio);
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final_color_blend(result,
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encode_light(light, 0), dayLight);
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}
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void final_color_blend(video::SColor *result,
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const video::SColor &data, const video::SColorf &dayLight)
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{
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static const video::SColorf artificialColor(1.04f, 1.04f, 1.04f);
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video::SColorf c(data);
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f32 n = 1 - c.a;
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f32 r = c.r * (c.a * dayLight.r + n * artificialColor.r) * 2.0f;
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f32 g = c.g * (c.a * dayLight.g + n * artificialColor.g) * 2.0f;
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f32 b = c.b * (c.a * dayLight.b + n * artificialColor.b) * 2.0f;
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// Emphase blue a bit in darker places
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// Each entry of this array represents a range of 8 blue levels
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static const u8 emphase_blue_when_dark[32] = {
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1, 4, 6, 6, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
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b += emphase_blue_when_dark[irr::core::clamp((s32) ((r + g + b) / 3 * 255),
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0, 255) / 8] / 255.0f;
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result->setRed(core::clamp((s32) (r * 255.0f), 0, 255));
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result->setGreen(core::clamp((s32) (g * 255.0f), 0, 255));
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result->setBlue(core::clamp((s32) (b * 255.0f), 0, 255));
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}
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/*
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Mesh generation helpers
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*/
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// This table is moved outside getNodeVertexDirs to avoid the compiler using
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// a mutex to initialize this table at runtime right in the hot path.
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// For details search the internet for "cxa_guard_acquire".
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static const v3s16 vertex_dirs_table[] = {
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// ( 1, 0, 0)
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v3s16( 1,-1, 1), v3s16( 1,-1,-1),
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v3s16( 1, 1,-1), v3s16( 1, 1, 1),
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// ( 0, 1, 0)
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v3s16( 1, 1,-1), v3s16(-1, 1,-1),
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v3s16(-1, 1, 1), v3s16( 1, 1, 1),
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// ( 0, 0, 1)
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v3s16(-1,-1, 1), v3s16( 1,-1, 1),
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v3s16( 1, 1, 1), v3s16(-1, 1, 1),
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// invalid
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v3s16(), v3s16(), v3s16(), v3s16(),
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// ( 0, 0,-1)
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v3s16( 1,-1,-1), v3s16(-1,-1,-1),
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v3s16(-1, 1,-1), v3s16( 1, 1,-1),
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// ( 0,-1, 0)
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v3s16( 1,-1, 1), v3s16(-1,-1, 1),
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v3s16(-1,-1,-1), v3s16( 1,-1,-1),
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// (-1, 0, 0)
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v3s16(-1,-1,-1), v3s16(-1,-1, 1),
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v3s16(-1, 1, 1), v3s16(-1, 1,-1)
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};
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/*
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Gets nth node tile (0 <= n <= 5).
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*/
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void getNodeTileN(MapNode mn, const v3s16 &p, u8 tileindex, MeshMakeData *data, TileSpec &tile)
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{
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const NodeDefManager *ndef = data->nodedef;
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const ContentFeatures &f = ndef->get(mn);
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tile = f.tiles[tileindex];
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bool has_crack = p == data->m_crack_pos_relative;
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for (TileLayer &layer : tile.layers) {
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if (layer.texture_id == 0)
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continue;
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if (!layer.has_color)
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mn.getColor(f, &(layer.color));
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// Apply temporary crack
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if (has_crack)
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layer.material_flags |= MATERIAL_FLAG_CRACK;
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}
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}
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/*
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Gets node tile given a face direction.
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*/
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void getNodeTile(MapNode mn, const v3s16 &p, const v3s16 &dir, MeshMakeData *data, TileSpec &tile)
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{
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const NodeDefManager *ndef = data->nodedef;
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// Direction must be (1,0,0), (-1,0,0), (0,1,0), (0,-1,0),
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// (0,0,1), (0,0,-1) or (0,0,0)
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assert(dir.X * dir.X + dir.Y * dir.Y + dir.Z * dir.Z <= 1);
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// Convert direction to single integer for table lookup
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// 0 = (0,0,0)
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// 1 = (1,0,0)
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// 2 = (0,1,0)
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// 3 = (0,0,1)
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// 4 = invalid, treat as (0,0,0)
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// 5 = (0,0,-1)
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// 6 = (0,-1,0)
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// 7 = (-1,0,0)
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u8 dir_i = (dir.X + 2 * dir.Y + 3 * dir.Z) & 7;
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// Get rotation for things like chests
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u8 facedir = mn.getFaceDir(ndef, true);
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static constexpr auto
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R0 = TileRotation::None,
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R1 = TileRotation::R90,
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R2 = TileRotation::R180,
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R3 = TileRotation::R270;
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static const struct {
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u8 tile;
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TileRotation rotation;
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} dir_to_tile[24][8] = {
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// 0 +X +Y +Z -Z -Y -X -> value=tile,rotation
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{{0,R0}, {2,R0}, {0,R0}, {4,R0}, {0,R0}, {5,R0}, {1,R0}, {3,R0}}, // rotate around y+ 0 - 3
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{{0,R0}, {4,R0}, {0,R3}, {3,R0}, {0,R0}, {2,R0}, {1,R1}, {5,R0}},
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{{0,R0}, {3,R0}, {0,R2}, {5,R0}, {0,R0}, {4,R0}, {1,R2}, {2,R0}},
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{{0,R0}, {5,R0}, {0,R1}, {2,R0}, {0,R0}, {3,R0}, {1,R3}, {4,R0}},
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{{0,R0}, {2,R3}, {5,R0}, {0,R2}, {0,R0}, {1,R0}, {4,R2}, {3,R1}}, // rotate around z+ 4 - 7
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{{0,R0}, {4,R3}, {2,R0}, {0,R1}, {0,R0}, {1,R1}, {3,R2}, {5,R1}},
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{{0,R0}, {3,R3}, {4,R0}, {0,R0}, {0,R0}, {1,R2}, {5,R2}, {2,R1}},
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{{0,R0}, {5,R3}, {3,R0}, {0,R3}, {0,R0}, {1,R3}, {2,R2}, {4,R1}},
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{{0,R0}, {2,R1}, {4,R2}, {1,R2}, {0,R0}, {0,R0}, {5,R0}, {3,R3}}, // rotate around z- 8 - 11
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{{0,R0}, {4,R1}, {3,R2}, {1,R3}, {0,R0}, {0,R3}, {2,R0}, {5,R3}},
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{{0,R0}, {3,R1}, {5,R2}, {1,R0}, {0,R0}, {0,R2}, {4,R0}, {2,R3}},
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{{0,R0}, {5,R1}, {2,R2}, {1,R1}, {0,R0}, {0,R1}, {3,R0}, {4,R3}},
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{{0,R0}, {0,R3}, {3,R3}, {4,R1}, {0,R0}, {5,R3}, {2,R3}, {1,R3}}, // rotate around x+ 12 - 15
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{{0,R0}, {0,R2}, {5,R3}, {3,R1}, {0,R0}, {2,R3}, {4,R3}, {1,R0}},
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{{0,R0}, {0,R1}, {2,R3}, {5,R1}, {0,R0}, {4,R3}, {3,R3}, {1,R1}},
|
|
{{0,R0}, {0,R0}, {4,R3}, {2,R1}, {0,R0}, {3,R3}, {5,R3}, {1,R2}},
|
|
|
|
{{0,R0}, {1,R1}, {2,R1}, {4,R3}, {0,R0}, {5,R1}, {3,R1}, {0,R1}}, // rotate around x- 16 - 19
|
|
{{0,R0}, {1,R2}, {4,R1}, {3,R3}, {0,R0}, {2,R1}, {5,R1}, {0,R0}},
|
|
{{0,R0}, {1,R3}, {3,R1}, {5,R3}, {0,R0}, {4,R1}, {2,R1}, {0,R3}},
|
|
{{0,R0}, {1,R0}, {5,R1}, {2,R3}, {0,R0}, {3,R1}, {4,R1}, {0,R2}},
|
|
|
|
{{0,R0}, {3,R2}, {1,R2}, {4,R2}, {0,R0}, {5,R2}, {0,R2}, {2,R2}}, // rotate around y- 20 - 23
|
|
{{0,R0}, {5,R2}, {1,R3}, {3,R2}, {0,R0}, {2,R2}, {0,R1}, {4,R2}},
|
|
{{0,R0}, {2,R2}, {1,R0}, {5,R2}, {0,R0}, {4,R2}, {0,R0}, {3,R2}},
|
|
{{0,R0}, {4,R2}, {1,R1}, {2,R2}, {0,R0}, {3,R2}, {0,R3}, {5,R2}}
|
|
};
|
|
getNodeTileN(mn, p, dir_to_tile[facedir][dir_i].tile, data, tile);
|
|
tile.rotation = tile.world_aligned ? TileRotation::None : dir_to_tile[facedir][dir_i].rotation;
|
|
}
|
|
|
|
static void applyTileColor(PreMeshBuffer &pmb)
|
|
{
|
|
video::SColor tc = pmb.layer.color;
|
|
if (tc == video::SColor(0xFFFFFFFF))
|
|
return;
|
|
for (video::S3DVertex &vertex : pmb.vertices) {
|
|
video::SColor *c = &vertex.Color;
|
|
c->set(c->getAlpha(),
|
|
c->getRed() * tc.getRed() / 255,
|
|
c->getGreen() * tc.getGreen() / 255,
|
|
c->getBlue() * tc.getBlue() / 255);
|
|
}
|
|
}
|
|
|
|
/*
|
|
MapBlockBspTree
|
|
*/
|
|
|
|
void MapBlockBspTree::buildTree(const std::vector<MeshTriangle> *triangles, u16 side_length)
|
|
{
|
|
this->triangles = triangles;
|
|
|
|
nodes.clear();
|
|
|
|
// assert that triangle index can fit into s32
|
|
assert(triangles->size() <= 0x7FFFFFFFL);
|
|
std::vector<s32> indexes;
|
|
indexes.reserve(triangles->size());
|
|
for (u32 i = 0; i < triangles->size(); i++)
|
|
indexes.push_back(i);
|
|
|
|
if (!indexes.empty()) {
|
|
// Start in the center of the block with increment of one quarter in each direction
|
|
root = buildTree(v3f(1, 0, 0), v3f((side_length + 1) * 0.5f * BS), side_length * 0.25f * BS, indexes, 0);
|
|
} else {
|
|
root = -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Find a candidate plane to split a set of triangles in two
|
|
*
|
|
* The candidate plane is represented by one of the triangles from the set.
|
|
*
|
|
* @param list Vector of indexes of the triangles in the set
|
|
* @param triangles Vector of all triangles in the BSP tree
|
|
* @return Address of the triangle that represents the proposed split plane
|
|
*/
|
|
static const MeshTriangle *findSplitCandidate(const std::vector<s32> &list, const std::vector<MeshTriangle> &triangles)
|
|
{
|
|
// find the center of the cluster.
|
|
v3f center(0, 0, 0);
|
|
size_t n = list.size();
|
|
for (s32 i : list) {
|
|
center += triangles[i].centroid / n;
|
|
}
|
|
|
|
// find the triangle with the largest area and closest to the center
|
|
const MeshTriangle *candidate_triangle = &triangles[list[0]];
|
|
const MeshTriangle *ith_triangle;
|
|
for (s32 i : list) {
|
|
ith_triangle = &triangles[i];
|
|
if (ith_triangle->areaSQ > candidate_triangle->areaSQ ||
|
|
(ith_triangle->areaSQ == candidate_triangle->areaSQ &&
|
|
ith_triangle->centroid.getDistanceFromSQ(center) < candidate_triangle->centroid.getDistanceFromSQ(center))) {
|
|
candidate_triangle = ith_triangle;
|
|
}
|
|
}
|
|
return candidate_triangle;
|
|
}
|
|
|
|
s32 MapBlockBspTree::buildTree(v3f normal, v3f origin, float delta, const std::vector<s32> &list, u32 depth)
|
|
{
|
|
// if the list is empty, don't bother
|
|
if (list.empty())
|
|
return -1;
|
|
|
|
// if there is only one triangle, or the delta is insanely small, this is a leaf node
|
|
if (list.size() == 1 || delta < 0.01) {
|
|
nodes.emplace_back(normal, origin, list, -1, -1);
|
|
return nodes.size() - 1;
|
|
}
|
|
|
|
std::vector<s32> front_list;
|
|
std::vector<s32> back_list;
|
|
std::vector<s32> node_list;
|
|
|
|
// split the list
|
|
for (s32 i : list) {
|
|
const MeshTriangle &triangle = (*triangles)[i];
|
|
float factor = normal.dotProduct(triangle.centroid - origin);
|
|
if (factor == 0)
|
|
node_list.push_back(i);
|
|
else if (factor > 0)
|
|
front_list.push_back(i);
|
|
else
|
|
back_list.push_back(i);
|
|
}
|
|
|
|
// define the new split-plane
|
|
v3f candidate_normal(normal.Z, normal.X, normal.Y);
|
|
float candidate_delta = delta;
|
|
if (depth % 3 == 2)
|
|
candidate_delta /= 2;
|
|
|
|
s32 front_index = -1;
|
|
s32 back_index = -1;
|
|
|
|
if (!front_list.empty()) {
|
|
v3f next_normal = candidate_normal;
|
|
v3f next_origin = origin + delta * normal;
|
|
float next_delta = candidate_delta;
|
|
if (next_delta < 5) {
|
|
const MeshTriangle *candidate = findSplitCandidate(front_list, *triangles);
|
|
next_normal = candidate->getNormal();
|
|
next_origin = candidate->centroid;
|
|
}
|
|
front_index = buildTree(next_normal, next_origin, next_delta, front_list, depth + 1);
|
|
|
|
// if there are no other triangles, don't create a new node
|
|
if (back_list.empty() && node_list.empty())
|
|
return front_index;
|
|
}
|
|
|
|
if (!back_list.empty()) {
|
|
v3f next_normal = candidate_normal;
|
|
v3f next_origin = origin - delta * normal;
|
|
float next_delta = candidate_delta;
|
|
if (next_delta < 5) {
|
|
const MeshTriangle *candidate = findSplitCandidate(back_list, *triangles);
|
|
next_normal = candidate->getNormal();
|
|
next_origin = candidate->centroid;
|
|
}
|
|
|
|
back_index = buildTree(next_normal, next_origin, next_delta, back_list, depth + 1);
|
|
|
|
// if there are no other triangles, don't create a new node
|
|
if (front_list.empty() && node_list.empty())
|
|
return back_index;
|
|
}
|
|
|
|
nodes.emplace_back(normal, origin, node_list, front_index, back_index);
|
|
|
|
return nodes.size() - 1;
|
|
}
|
|
|
|
void MapBlockBspTree::traverse(s32 node, v3f viewpoint, std::vector<s32> &output) const
|
|
{
|
|
if (node < 0) return; // recursion break;
|
|
|
|
const TreeNode &n = nodes[node];
|
|
float factor = n.normal.dotProduct(viewpoint - n.origin);
|
|
|
|
if (factor > 0)
|
|
traverse(n.back_ref, viewpoint, output);
|
|
else
|
|
traverse(n.front_ref, viewpoint, output);
|
|
|
|
if (factor != 0)
|
|
for (s32 i : n.triangle_refs)
|
|
output.push_back(i);
|
|
|
|
if (factor > 0)
|
|
traverse(n.front_ref, viewpoint, output);
|
|
else
|
|
traverse(n.back_ref, viewpoint, output);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
PartialMeshBuffer
|
|
*/
|
|
|
|
void PartialMeshBuffer::beforeDraw() const
|
|
{
|
|
// Patch the indexes in the mesh buffer before draw
|
|
m_buffer->Indices = std::move(m_vertex_indexes);
|
|
m_buffer->setDirty(scene::EBT_INDEX);
|
|
}
|
|
|
|
void PartialMeshBuffer::afterDraw() const
|
|
{
|
|
// Take the data back
|
|
m_vertex_indexes = m_buffer->Indices.steal();
|
|
}
|
|
|
|
/*
|
|
MapBlockMesh
|
|
*/
|
|
|
|
MapBlockMesh::MapBlockMesh(Client *client, MeshMakeData *data, v3s16 camera_offset):
|
|
m_tsrc(client->getTextureSource()),
|
|
m_shdrsrc(client->getShaderSource()),
|
|
m_bounding_sphere_center((data->side_length * 0.5f - 0.5f) * BS),
|
|
m_animation_force_timer(0), // force initial animation
|
|
m_last_crack(-1),
|
|
m_last_daynight_ratio((u32) -1)
|
|
{
|
|
for (auto &m : m_mesh)
|
|
m = new scene::SMesh();
|
|
m_enable_shaders = data->m_use_shaders;
|
|
|
|
auto mesh_grid = client->getMeshGrid();
|
|
v3s16 bp = data->m_blockpos;
|
|
// Only generate minimap mapblocks at even coordinates.
|
|
if (mesh_grid.isMeshPos(bp) && client->getMinimap()) {
|
|
m_minimap_mapblocks.resize(mesh_grid.getCellVolume(), nullptr);
|
|
v3s16 ofs;
|
|
|
|
// See also client.cpp for the code that reads the array of minimap blocks.
|
|
for (ofs.Z = 0; ofs.Z < mesh_grid.cell_size; ofs.Z++)
|
|
for (ofs.Y = 0; ofs.Y < mesh_grid.cell_size; ofs.Y++)
|
|
for (ofs.X = 0; ofs.X < mesh_grid.cell_size; ofs.X++) {
|
|
v3s16 p = (bp + ofs) * MAP_BLOCKSIZE;
|
|
if (data->m_vmanip.getNodeNoEx(p).getContent() != CONTENT_IGNORE) {
|
|
MinimapMapblock *block = new MinimapMapblock;
|
|
m_minimap_mapblocks[mesh_grid.getOffsetIndex(ofs)] = block;
|
|
block->getMinimapNodes(&data->m_vmanip, p);
|
|
}
|
|
}
|
|
}
|
|
|
|
v3f offset = intToFloat((data->m_blockpos - mesh_grid.getMeshPos(data->m_blockpos)) * MAP_BLOCKSIZE, BS);
|
|
MeshCollector collector(m_bounding_sphere_center, offset);
|
|
/*
|
|
Add special graphics:
|
|
- torches
|
|
- flowing water
|
|
- fences
|
|
- whatever
|
|
*/
|
|
|
|
{
|
|
MapblockMeshGenerator(data, &collector,
|
|
client->getSceneManager()->getMeshManipulator()).generate();
|
|
}
|
|
|
|
/*
|
|
Convert MeshCollector to SMesh
|
|
*/
|
|
|
|
const bool desync_animations = g_settings->getBool(
|
|
"desynchronize_mapblock_texture_animation");
|
|
|
|
m_bounding_radius = std::sqrt(collector.m_bounding_radius_sq);
|
|
|
|
for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
|
|
scene::SMesh *mesh = (scene::SMesh *)m_mesh[layer];
|
|
|
|
for(u32 i = 0; i < collector.prebuffers[layer].size(); i++)
|
|
{
|
|
PreMeshBuffer &p = collector.prebuffers[layer][i];
|
|
|
|
applyTileColor(p);
|
|
|
|
// Generate animation data
|
|
// - Cracks
|
|
if (p.layer.material_flags & MATERIAL_FLAG_CRACK) {
|
|
// Find the texture name plus ^[crack:N:
|
|
std::ostringstream os(std::ios::binary);
|
|
os << m_tsrc->getTextureName(p.layer.texture_id) << "^[crack";
|
|
if (p.layer.material_flags & MATERIAL_FLAG_CRACK_OVERLAY)
|
|
os << "o"; // use ^[cracko
|
|
u8 tiles = p.layer.scale;
|
|
if (tiles > 1)
|
|
os << ":" << (u32)tiles;
|
|
os << ":" << (u32)p.layer.animation_frame_count << ":";
|
|
m_crack_materials.insert(std::make_pair(
|
|
std::pair<u8, u32>(layer, i), os.str()));
|
|
// Replace tile texture with the cracked one
|
|
p.layer.texture = m_tsrc->getTextureForMesh(
|
|
os.str() + "0",
|
|
&p.layer.texture_id);
|
|
}
|
|
// - Texture animation
|
|
if (p.layer.material_flags & MATERIAL_FLAG_ANIMATION) {
|
|
// Add to MapBlockMesh in order to animate these tiles
|
|
auto &info = m_animation_info[{layer, i}];
|
|
info.tile = p.layer;
|
|
info.frame = 0;
|
|
if (desync_animations) {
|
|
// Get starting position from noise
|
|
info.frame_offset =
|
|
100000 * (2.0 + noise3d(
|
|
data->m_blockpos.X, data->m_blockpos.Y,
|
|
data->m_blockpos.Z, 0));
|
|
} else {
|
|
// Play all synchronized
|
|
info.frame_offset = 0;
|
|
}
|
|
// Replace tile texture with the first animation frame
|
|
p.layer.texture = (*p.layer.frames)[0].texture;
|
|
}
|
|
|
|
if (!m_enable_shaders) {
|
|
// Extract colors for day-night animation
|
|
// Dummy sunlight to handle non-sunlit areas
|
|
video::SColorf sunlight;
|
|
get_sunlight_color(&sunlight, 0);
|
|
|
|
std::map<u32, video::SColor> colors;
|
|
const u32 vertex_count = p.vertices.size();
|
|
for (u32 j = 0; j < vertex_count; j++) {
|
|
video::SColor *vc = &p.vertices[j].Color;
|
|
video::SColor copy = *vc;
|
|
if (vc->getAlpha() == 0) // No sunlight - no need to animate
|
|
final_color_blend(vc, copy, sunlight); // Finalize color
|
|
else // Record color to animate
|
|
colors[j] = copy;
|
|
|
|
// The sunlight ratio has been stored,
|
|
// delete alpha (for the final rendering).
|
|
vc->setAlpha(255);
|
|
}
|
|
if (!colors.empty())
|
|
m_daynight_diffs[{layer, i}] = std::move(colors);
|
|
}
|
|
|
|
// Create material
|
|
video::SMaterial material;
|
|
material.Lighting = false;
|
|
material.BackfaceCulling = true;
|
|
material.FogEnable = true;
|
|
material.setTexture(0, p.layer.texture);
|
|
material.forEachTexture([] (auto &tex) {
|
|
tex.MinFilter = video::ETMINF_NEAREST_MIPMAP_NEAREST;
|
|
tex.MagFilter = video::ETMAGF_NEAREST;
|
|
});
|
|
|
|
if (m_enable_shaders) {
|
|
material.MaterialType = m_shdrsrc->getShaderInfo(
|
|
p.layer.shader_id).material;
|
|
p.layer.applyMaterialOptionsWithShaders(material);
|
|
if (p.layer.normal_texture)
|
|
material.setTexture(1, p.layer.normal_texture);
|
|
material.setTexture(2, p.layer.flags_texture);
|
|
} else {
|
|
p.layer.applyMaterialOptions(material);
|
|
}
|
|
|
|
scene::SMeshBuffer *buf = new scene::SMeshBuffer();
|
|
buf->Material = material;
|
|
if (p.layer.isTransparent()) {
|
|
buf->append(&p.vertices[0], p.vertices.size(), nullptr, 0);
|
|
|
|
MeshTriangle t;
|
|
t.buffer = buf;
|
|
m_transparent_triangles.reserve(p.indices.size() / 3);
|
|
for (u32 i = 0; i < p.indices.size(); i += 3) {
|
|
t.p1 = p.indices[i];
|
|
t.p2 = p.indices[i + 1];
|
|
t.p3 = p.indices[i + 2];
|
|
t.updateAttributes();
|
|
m_transparent_triangles.push_back(t);
|
|
}
|
|
} else {
|
|
buf->append(&p.vertices[0], p.vertices.size(),
|
|
&p.indices[0], p.indices.size());
|
|
}
|
|
mesh->addMeshBuffer(buf);
|
|
buf->drop();
|
|
}
|
|
|
|
if (mesh) {
|
|
// Use VBO for mesh (this just would set this for ever buffer)
|
|
mesh->setHardwareMappingHint(scene::EHM_STATIC);
|
|
}
|
|
}
|
|
|
|
//std::cout<<"added "<<fastfaces.getSize()<<" faces."<<std::endl;
|
|
m_bsp_tree.buildTree(&m_transparent_triangles, data->side_length);
|
|
|
|
// Check if animation is required for this mesh
|
|
m_has_animation =
|
|
!m_crack_materials.empty() ||
|
|
!m_daynight_diffs.empty() ||
|
|
!m_animation_info.empty();
|
|
}
|
|
|
|
MapBlockMesh::~MapBlockMesh()
|
|
{
|
|
for (scene::IMesh *m : m_mesh) {
|
|
m->drop();
|
|
}
|
|
for (MinimapMapblock *block : m_minimap_mapblocks)
|
|
delete block;
|
|
}
|
|
|
|
bool MapBlockMesh::animate(bool faraway, float time, int crack,
|
|
u32 daynight_ratio)
|
|
{
|
|
if (!m_has_animation) {
|
|
m_animation_force_timer = 100000;
|
|
return false;
|
|
}
|
|
|
|
m_animation_force_timer = myrand_range(5, 100);
|
|
|
|
// Cracks
|
|
if (crack != m_last_crack) {
|
|
for (auto &crack_material : m_crack_materials) {
|
|
scene::IMeshBuffer *buf = m_mesh[crack_material.first.first]->
|
|
getMeshBuffer(crack_material.first.second);
|
|
|
|
// Create new texture name from original
|
|
std::string s = crack_material.second + itos(crack);
|
|
u32 new_texture_id = 0;
|
|
video::ITexture *new_texture =
|
|
m_tsrc->getTextureForMesh(s, &new_texture_id);
|
|
buf->getMaterial().setTexture(0, new_texture);
|
|
|
|
// If the current material is also animated, update animation info
|
|
auto anim_it = m_animation_info.find(crack_material.first);
|
|
if (anim_it != m_animation_info.end()) {
|
|
TileLayer &tile = anim_it->second.tile;
|
|
tile.texture = new_texture;
|
|
tile.texture_id = new_texture_id;
|
|
// force animation update
|
|
anim_it->second.frame = -1;
|
|
}
|
|
}
|
|
|
|
m_last_crack = crack;
|
|
}
|
|
|
|
// Texture animation
|
|
for (auto &it : m_animation_info) {
|
|
const TileLayer &tile = it.second.tile;
|
|
// Figure out current frame
|
|
int frameno = (int)(time * 1000 / tile.animation_frame_length_ms
|
|
+ it.second.frame_offset) % tile.animation_frame_count;
|
|
// If frame doesn't change, skip
|
|
if (frameno == it.second.frame)
|
|
continue;
|
|
|
|
it.second.frame = frameno;
|
|
|
|
scene::IMeshBuffer *buf = m_mesh[it.first.first]->getMeshBuffer(it.first.second);
|
|
|
|
const FrameSpec &frame = (*tile.frames)[frameno];
|
|
buf->getMaterial().setTexture(0, frame.texture);
|
|
if (m_enable_shaders) {
|
|
if (frame.normal_texture)
|
|
buf->getMaterial().setTexture(1, frame.normal_texture);
|
|
buf->getMaterial().setTexture(2, frame.flags_texture);
|
|
}
|
|
}
|
|
|
|
// Day-night transition
|
|
if (!m_enable_shaders && (daynight_ratio != m_last_daynight_ratio)) {
|
|
video::SColorf day_color;
|
|
get_sunlight_color(&day_color, daynight_ratio);
|
|
|
|
for (auto &daynight_diff : m_daynight_diffs) {
|
|
auto *mesh = m_mesh[daynight_diff.first.first];
|
|
mesh->setDirty(scene::EBT_VERTEX); // force reload to VBO
|
|
scene::IMeshBuffer *buf = mesh->
|
|
getMeshBuffer(daynight_diff.first.second);
|
|
video::S3DVertex *vertices = (video::S3DVertex *)buf->getVertices();
|
|
for (const auto &j : daynight_diff.second)
|
|
final_color_blend(&(vertices[j.first].Color), j.second,
|
|
day_color);
|
|
}
|
|
m_last_daynight_ratio = daynight_ratio;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void MapBlockMesh::updateTransparentBuffers(v3f camera_pos, v3s16 block_pos)
|
|
{
|
|
// nothing to do if the entire block is opaque
|
|
if (m_transparent_triangles.empty())
|
|
return;
|
|
|
|
v3f block_posf = intToFloat(block_pos * MAP_BLOCKSIZE, BS);
|
|
v3f rel_camera_pos = camera_pos - block_posf;
|
|
|
|
std::vector<s32> triangle_refs;
|
|
m_bsp_tree.traverse(rel_camera_pos, triangle_refs);
|
|
|
|
// arrange index sequences into partial buffers
|
|
m_transparent_buffers.clear();
|
|
|
|
scene::SMeshBuffer *current_buffer = nullptr;
|
|
std::vector<u16> current_strain;
|
|
for (auto i : triangle_refs) {
|
|
const auto &t = m_transparent_triangles[i];
|
|
if (current_buffer != t.buffer) {
|
|
if (current_buffer) {
|
|
m_transparent_buffers.emplace_back(current_buffer, std::move(current_strain));
|
|
current_strain.clear();
|
|
}
|
|
current_buffer = t.buffer;
|
|
}
|
|
current_strain.push_back(t.p1);
|
|
current_strain.push_back(t.p2);
|
|
current_strain.push_back(t.p3);
|
|
}
|
|
|
|
if (!current_strain.empty())
|
|
m_transparent_buffers.emplace_back(current_buffer, std::move(current_strain));
|
|
}
|
|
|
|
void MapBlockMesh::consolidateTransparentBuffers()
|
|
{
|
|
m_transparent_buffers.clear();
|
|
|
|
scene::SMeshBuffer *current_buffer = nullptr;
|
|
std::vector<u16> current_strain;
|
|
|
|
// use the fact that m_transparent_triangles is already arranged by buffer
|
|
for (const auto &t : m_transparent_triangles) {
|
|
if (current_buffer != t.buffer) {
|
|
if (current_buffer != nullptr) {
|
|
this->m_transparent_buffers.emplace_back(current_buffer, std::move(current_strain));
|
|
current_strain.clear();
|
|
}
|
|
current_buffer = t.buffer;
|
|
}
|
|
current_strain.push_back(t.p1);
|
|
current_strain.push_back(t.p2);
|
|
current_strain.push_back(t.p3);
|
|
}
|
|
|
|
if (!current_strain.empty()) {
|
|
this->m_transparent_buffers.emplace_back(current_buffer, std::move(current_strain));
|
|
}
|
|
}
|
|
|
|
video::SColor encode_light(u16 light, u8 emissive_light)
|
|
{
|
|
// Get components
|
|
u32 day = (light & 0xff);
|
|
u32 night = (light >> 8);
|
|
// Add emissive light
|
|
night += emissive_light * 2.5f;
|
|
if (night > 255)
|
|
night = 255;
|
|
// Since we don't know if the day light is sunlight or
|
|
// artificial light, assume it is artificial when the night
|
|
// light bank is also lit.
|
|
if (day < night)
|
|
day = 0;
|
|
else
|
|
day = day - night;
|
|
u32 sum = day + night;
|
|
// Ratio of sunlight:
|
|
u32 r;
|
|
if (sum > 0)
|
|
r = day * 255 / sum;
|
|
else
|
|
r = 0;
|
|
// Average light:
|
|
float b = (day + night) / 2;
|
|
return video::SColor(r, b, b, b);
|
|
}
|
|
|
|
u8 get_solid_sides(MeshMakeData *data)
|
|
{
|
|
std::unordered_map<v3s16, u8> results;
|
|
v3s16 ofs;
|
|
v3s16 blockpos_nodes = data->m_blockpos * MAP_BLOCKSIZE;
|
|
const NodeDefManager *ndef = data->nodedef;
|
|
|
|
u8 result = 0x3F; // all sides solid;
|
|
|
|
for (s16 i = 0; i < data->side_length && result != 0; i++)
|
|
for (s16 j = 0; j < data->side_length && result != 0; j++) {
|
|
v3s16 positions[6] = {
|
|
v3s16(0, i, j),
|
|
v3s16(data->side_length - 1, i, j),
|
|
v3s16(i, 0, j),
|
|
v3s16(i, data->side_length - 1, j),
|
|
v3s16(i, j, 0),
|
|
v3s16(i, j, data->side_length - 1)
|
|
};
|
|
|
|
for (u8 k = 0; k < 6; k++) {
|
|
const MapNode &top = data->m_vmanip.getNodeRefUnsafe(blockpos_nodes + positions[k]);
|
|
if (ndef->get(top).solidness != 2)
|
|
result &= ~(1 << k);
|
|
}
|
|
}
|
|
return result;
|
|
}
|