/
mapblock_mesh.cpp
1323 lines (1155 loc) · 35 KB
/
mapblock_mesh.cpp
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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "mapblock_mesh.h"
#include "client.h"
#include "mapblock.h"
#include "map.h"
#include "profiler.h"
#include "shader.h"
#include "mesh.h"
#include "minimap.h"
#include "content_mapblock.h"
#include "util/directiontables.h"
#include "client/meshgen/collector.h"
#include "client/renderingengine.h"
#include <array>
/*
MeshMakeData
*/
MeshMakeData::MeshMakeData(Client *client, bool use_shaders):
m_client(client),
m_use_shaders(use_shaders)
{}
void MeshMakeData::fillBlockDataBegin(const v3s16 &blockpos)
{
m_blockpos = blockpos;
v3s16 blockpos_nodes = m_blockpos*MAP_BLOCKSIZE;
m_vmanip.clear();
VoxelArea voxel_area(blockpos_nodes - v3s16(1,1,1) * MAP_BLOCKSIZE,
blockpos_nodes + v3s16(1,1,1) * MAP_BLOCKSIZE*2-v3s16(1,1,1));
m_vmanip.addArea(voxel_area);
}
void MeshMakeData::fillBlockData(const v3s16 &block_offset, MapNode *data)
{
v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
v3s16 bp = m_blockpos + block_offset;
v3s16 blockpos_nodes = bp * MAP_BLOCKSIZE;
m_vmanip.copyFrom(data, data_area, v3s16(0,0,0), blockpos_nodes, data_size);
}
void MeshMakeData::fill(MapBlock *block)
{
fillBlockDataBegin(block->getPos());
fillBlockData(v3s16(0,0,0), block->getData());
// Get map for reading neighbor blocks
Map *map = block->getParent();
for (const v3s16 &dir : g_26dirs) {
v3s16 bp = m_blockpos + dir;
MapBlock *b = map->getBlockNoCreateNoEx(bp);
if(b)
fillBlockData(dir, b->getData());
}
}
void MeshMakeData::setCrack(int crack_level, v3s16 crack_pos)
{
if (crack_level >= 0)
m_crack_pos_relative = crack_pos - m_blockpos*MAP_BLOCKSIZE;
}
void MeshMakeData::setSmoothLighting(bool smooth_lighting)
{
m_smooth_lighting = smooth_lighting;
}
/*
Light and vertex color functions
*/
/*
Calculate non-smooth lighting at interior of node.
Single light bank.
*/
static u8 getInteriorLight(enum LightBank bank, MapNode n, s32 increment,
const NodeDefManager *ndef)
{
u8 light = n.getLight(bank, ndef);
if (light > 0)
light = rangelim(light + increment, 0, LIGHT_SUN);
return decode_light(light);
}
/*
Calculate non-smooth lighting at interior of node.
Both light banks.
*/
u16 getInteriorLight(MapNode n, s32 increment, const NodeDefManager *ndef)
{
u16 day = getInteriorLight(LIGHTBANK_DAY, n, increment, ndef);
u16 night = getInteriorLight(LIGHTBANK_NIGHT, n, increment, ndef);
return day | (night << 8);
}
/*
Calculate non-smooth lighting at face of node.
Single light bank.
*/
static u8 getFaceLight(enum LightBank bank, MapNode n, MapNode n2,
v3s16 face_dir, const NodeDefManager *ndef)
{
u8 light;
u8 l1 = n.getLight(bank, ndef);
u8 l2 = n2.getLight(bank, ndef);
if(l1 > l2)
light = l1;
else
light = l2;
// Boost light level for light sources
u8 light_source = MYMAX(ndef->get(n).light_source,
ndef->get(n2).light_source);
if(light_source > light)
light = light_source;
return decode_light(light);
}
/*
Calculate non-smooth lighting at face of node.
Both light banks.
*/
u16 getFaceLight(MapNode n, MapNode n2, const v3s16 &face_dir,
const NodeDefManager *ndef)
{
u16 day = getFaceLight(LIGHTBANK_DAY, n, n2, face_dir, ndef);
u16 night = getFaceLight(LIGHTBANK_NIGHT, n, n2, face_dir, ndef);
return day | (night << 8);
}
/*
Calculate smooth lighting at the XYZ- corner of p.
Both light banks
*/
static u16 getSmoothLightCombined(const v3s16 &p,
const std::array<v3s16,8> &dirs, MeshMakeData *data)
{
const NodeDefManager *ndef = data->m_client->ndef();
u16 ambient_occlusion = 0;
u16 light_count = 0;
u8 light_source_max = 0;
u16 light_day = 0;
u16 light_night = 0;
bool direct_sunlight = false;
auto add_node = [&] (u8 i, bool obstructed = false) -> bool {
if (obstructed) {
ambient_occlusion++;
return false;
}
MapNode n = data->m_vmanip.getNodeNoExNoEmerge(p + dirs[i]);
if (n.getContent() == CONTENT_IGNORE)
return true;
const ContentFeatures &f = ndef->get(n);
if (f.light_source > light_source_max)
light_source_max = f.light_source;
// Check f.solidness because fast-style leaves look better this way
if (f.param_type == CPT_LIGHT && f.solidness != 2) {
u8 light_level_day = n.getLightNoChecks(LIGHTBANK_DAY, &f);
u8 light_level_night = n.getLightNoChecks(LIGHTBANK_NIGHT, &f);
if (light_level_day == LIGHT_SUN)
direct_sunlight = true;
light_day += decode_light(light_level_day);
light_night += decode_light(light_level_night);
light_count++;
} else {
ambient_occlusion++;
}
return f.light_propagates;
};
bool obstructed[4] = { true, true, true, true };
add_node(0);
bool opaque1 = !add_node(1);
bool opaque2 = !add_node(2);
bool opaque3 = !add_node(3);
obstructed[0] = opaque1 && opaque2;
obstructed[1] = opaque1 && opaque3;
obstructed[2] = opaque2 && opaque3;
for (u8 k = 0; k < 3; ++k)
if (add_node(k + 4, obstructed[k]))
obstructed[3] = false;
if (add_node(7, obstructed[3])) { // wrap light around nodes
ambient_occlusion -= 3;
for (u8 k = 0; k < 3; ++k)
add_node(k + 4, !obstructed[k]);
}
if (light_count == 0) {
light_day = light_night = 0;
} else {
light_day /= light_count;
light_night /= light_count;
}
// boost direct sunlight, if any
if (direct_sunlight)
light_day = 0xFF;
// Boost brightness around light sources
bool skip_ambient_occlusion_day = false;
if (decode_light(light_source_max) >= light_day) {
light_day = decode_light(light_source_max);
skip_ambient_occlusion_day = true;
}
bool skip_ambient_occlusion_night = false;
if(decode_light(light_source_max) >= light_night) {
light_night = decode_light(light_source_max);
skip_ambient_occlusion_night = true;
}
if (ambient_occlusion > 4) {
static thread_local const float ao_gamma = rangelim(
g_settings->getFloat("ambient_occlusion_gamma"), 0.25, 4.0);
// Table of gamma space multiply factors.
static thread_local const float light_amount[3] = {
powf(0.75, 1.0 / ao_gamma),
powf(0.5, 1.0 / ao_gamma),
powf(0.25, 1.0 / ao_gamma)
};
//calculate table index for gamma space multiplier
ambient_occlusion -= 5;
if (!skip_ambient_occlusion_day)
light_day = rangelim(core::round32(
light_day * light_amount[ambient_occlusion]), 0, 255);
if (!skip_ambient_occlusion_night)
light_night = rangelim(core::round32(
light_night * light_amount[ambient_occlusion]), 0, 255);
}
return light_day | (light_night << 8);
}
/*
Calculate smooth lighting at the given corner of p.
Both light banks.
Node at p is solid, and thus the lighting is face-dependent.
*/
u16 getSmoothLightSolid(const v3s16 &p, const v3s16 &face_dir, const v3s16 &corner, MeshMakeData *data)
{
return getSmoothLightTransparent(p + face_dir, corner - 2 * face_dir, data);
}
/*
Calculate smooth lighting at the given corner of p.
Both light banks.
Node at p is not solid, and the lighting is not face-dependent.
*/
u16 getSmoothLightTransparent(const v3s16 &p, const v3s16 &corner, MeshMakeData *data)
{
const std::array<v3s16,8> dirs = {{
// Always shine light
v3s16(0,0,0),
v3s16(corner.X,0,0),
v3s16(0,corner.Y,0),
v3s16(0,0,corner.Z),
// Can be obstructed
v3s16(corner.X,corner.Y,0),
v3s16(corner.X,0,corner.Z),
v3s16(0,corner.Y,corner.Z),
v3s16(corner.X,corner.Y,corner.Z)
}};
return getSmoothLightCombined(p, dirs, data);
}
void get_sunlight_color(video::SColorf *sunlight, u32 daynight_ratio){
f32 rg = daynight_ratio / 1000.0f - 0.04f;
f32 b = (0.98f * daynight_ratio) / 1000.0f + 0.078f;
sunlight->r = rg;
sunlight->g = rg;
sunlight->b = b;
}
void final_color_blend(video::SColor *result,
u16 light, u32 daynight_ratio)
{
video::SColorf dayLight;
get_sunlight_color(&dayLight, daynight_ratio);
final_color_blend(result,
encode_light(light, 0), dayLight);
}
void final_color_blend(video::SColor *result,
const video::SColor &data, const video::SColorf &dayLight)
{
static const video::SColorf artificialColor(1.04f, 1.04f, 1.04f);
video::SColorf c(data);
f32 n = 1 - c.a;
f32 r = c.r * (c.a * dayLight.r + n * artificialColor.r) * 2.0f;
f32 g = c.g * (c.a * dayLight.g + n * artificialColor.g) * 2.0f;
f32 b = c.b * (c.a * dayLight.b + n * artificialColor.b) * 2.0f;
// Emphase blue a bit in darker places
// Each entry of this array represents a range of 8 blue levels
static const u8 emphase_blue_when_dark[32] = {
1, 4, 6, 6, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
b += emphase_blue_when_dark[irr::core::clamp((s32) ((r + g + b) / 3 * 255),
0, 255) / 8] / 255.0f;
result->setRed(core::clamp((s32) (r * 255.0f), 0, 255));
result->setGreen(core::clamp((s32) (g * 255.0f), 0, 255));
result->setBlue(core::clamp((s32) (b * 255.0f), 0, 255));
}
/*
Mesh generation helpers
*/
// This table is moved outside getNodeVertexDirs to avoid the compiler using
// a mutex to initialize this table at runtime right in the hot path.
// For details search the internet for "cxa_guard_acquire".
static const v3s16 vertex_dirs_table[] = {
// ( 1, 0, 0)
v3s16( 1,-1, 1), v3s16( 1,-1,-1),
v3s16( 1, 1,-1), v3s16( 1, 1, 1),
// ( 0, 1, 0)
v3s16( 1, 1,-1), v3s16(-1, 1,-1),
v3s16(-1, 1, 1), v3s16( 1, 1, 1),
// ( 0, 0, 1)
v3s16(-1,-1, 1), v3s16( 1,-1, 1),
v3s16( 1, 1, 1), v3s16(-1, 1, 1),
// invalid
v3s16(), v3s16(), v3s16(), v3s16(),
// ( 0, 0,-1)
v3s16( 1,-1,-1), v3s16(-1,-1,-1),
v3s16(-1, 1,-1), v3s16( 1, 1,-1),
// ( 0,-1, 0)
v3s16( 1,-1, 1), v3s16(-1,-1, 1),
v3s16(-1,-1,-1), v3s16( 1,-1,-1),
// (-1, 0, 0)
v3s16(-1,-1,-1), v3s16(-1,-1, 1),
v3s16(-1, 1, 1), v3s16(-1, 1,-1)
};
/*
vertex_dirs: v3s16[4]
*/
static void getNodeVertexDirs(const v3s16 &dir, v3s16 *vertex_dirs)
{
/*
If looked from outside the node towards the face, the corners are:
0: bottom-right
1: bottom-left
2: top-left
3: top-right
*/
// Direction must be (1,0,0), (-1,0,0), (0,1,0), (0,-1,0),
// (0,0,1), (0,0,-1)
assert(dir.X * dir.X + dir.Y * dir.Y + dir.Z * dir.Z == 1);
// Convert direction to single integer for table lookup
u8 idx = (dir.X + 2 * dir.Y + 3 * dir.Z) & 7;
idx = (idx - 1) * 4;
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#if __GNUC__ > 7
#pragma GCC diagnostic ignored "-Wclass-memaccess"
#endif
#endif
memcpy(vertex_dirs, &vertex_dirs_table[idx], 4 * sizeof(v3s16));
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
}
static void getNodeTextureCoords(v3f base, const v3f &scale, const v3s16 &dir, float *u, float *v)
{
if (dir.X > 0 || dir.Y != 0 || dir.Z < 0)
base -= scale;
if (dir == v3s16(0,0,1)) {
*u = -base.X - 1;
*v = -base.Y - 1;
} else if (dir == v3s16(0,0,-1)) {
*u = base.X + 1;
*v = -base.Y - 2;
} else if (dir == v3s16(1,0,0)) {
*u = base.Z + 1;
*v = -base.Y - 2;
} else if (dir == v3s16(-1,0,0)) {
*u = -base.Z - 1;
*v = -base.Y - 1;
} else if (dir == v3s16(0,1,0)) {
*u = base.X + 1;
*v = -base.Z - 2;
} else if (dir == v3s16(0,-1,0)) {
*u = base.X + 1;
*v = base.Z + 1;
}
}
struct FastFace
{
TileSpec tile;
video::S3DVertex vertices[4]; // Precalculated vertices
/*!
* The face is divided into two triangles. If this is true,
* vertices 0 and 2 are connected, othervise vertices 1 and 3
* are connected.
*/
bool vertex_0_2_connected;
};
static void makeFastFace(const TileSpec &tile, u16 li0, u16 li1, u16 li2, u16 li3,
const v3f &tp, const v3f &p, const v3s16 &dir, const v3f &scale, std::vector<FastFace> &dest)
{
// Position is at the center of the cube.
v3f pos = p * BS;
float x0 = 0.0f;
float y0 = 0.0f;
float w = 1.0f;
float h = 1.0f;
v3f vertex_pos[4];
v3s16 vertex_dirs[4];
getNodeVertexDirs(dir, vertex_dirs);
if (tile.world_aligned)
getNodeTextureCoords(tp, scale, dir, &x0, &y0);
v3s16 t;
u16 t1;
switch (tile.rotation) {
case 0:
break;
case 1: //R90
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[3];
vertex_dirs[3] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[1];
vertex_dirs[1] = t;
t1 = li0;
li0 = li3;
li3 = li2;
li2 = li1;
li1 = t1;
break;
case 2: //R180
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[2];
vertex_dirs[2] = t;
t = vertex_dirs[1];
vertex_dirs[1] = vertex_dirs[3];
vertex_dirs[3] = t;
t1 = li0;
li0 = li2;
li2 = t1;
t1 = li1;
li1 = li3;
li3 = t1;
break;
case 3: //R270
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[1];
vertex_dirs[1] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[3];
vertex_dirs[3] = t;
t1 = li0;
li0 = li1;
li1 = li2;
li2 = li3;
li3 = t1;
break;
case 4: //FXR90
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[3];
vertex_dirs[3] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[1];
vertex_dirs[1] = t;
t1 = li0;
li0 = li3;
li3 = li2;
li2 = li1;
li1 = t1;
y0 += h;
h *= -1;
break;
case 5: //FXR270
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[1];
vertex_dirs[1] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[3];
vertex_dirs[3] = t;
t1 = li0;
li0 = li1;
li1 = li2;
li2 = li3;
li3 = t1;
y0 += h;
h *= -1;
break;
case 6: //FYR90
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[3];
vertex_dirs[3] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[1];
vertex_dirs[1] = t;
t1 = li0;
li0 = li3;
li3 = li2;
li2 = li1;
li1 = t1;
x0 += w;
w *= -1;
break;
case 7: //FYR270
t = vertex_dirs[0];
vertex_dirs[0] = vertex_dirs[1];
vertex_dirs[1] = vertex_dirs[2];
vertex_dirs[2] = vertex_dirs[3];
vertex_dirs[3] = t;
t1 = li0;
li0 = li1;
li1 = li2;
li2 = li3;
li3 = t1;
x0 += w;
w *= -1;
break;
case 8: //FX
y0 += h;
h *= -1;
break;
case 9: //FY
x0 += w;
w *= -1;
break;
default:
break;
}
for (u16 i = 0; i < 4; i++) {
vertex_pos[i] = v3f(
BS / 2 * vertex_dirs[i].X,
BS / 2 * vertex_dirs[i].Y,
BS / 2 * vertex_dirs[i].Z
);
}
for (v3f &vpos : vertex_pos) {
vpos.X *= scale.X;
vpos.Y *= scale.Y;
vpos.Z *= scale.Z;
vpos += pos;
}
f32 abs_scale = 1.0f;
if (scale.X < 0.999f || scale.X > 1.001f) abs_scale = scale.X;
else if (scale.Y < 0.999f || scale.Y > 1.001f) abs_scale = scale.Y;
else if (scale.Z < 0.999f || scale.Z > 1.001f) abs_scale = scale.Z;
v3f normal(dir.X, dir.Y, dir.Z);
u16 li[4] = { li0, li1, li2, li3 };
u16 day[4];
u16 night[4];
for (u8 i = 0; i < 4; i++) {
day[i] = li[i] >> 8;
night[i] = li[i] & 0xFF;
}
bool vertex_0_2_connected = abs(day[0] - day[2]) + abs(night[0] - night[2])
< abs(day[1] - day[3]) + abs(night[1] - night[3]);
v2f32 f[4] = {
core::vector2d<f32>(x0 + w * abs_scale, y0 + h),
core::vector2d<f32>(x0, y0 + h),
core::vector2d<f32>(x0, y0),
core::vector2d<f32>(x0 + w * abs_scale, y0) };
// equivalent to dest.push_back(FastFace()) but faster
dest.emplace_back();
FastFace& face = *dest.rbegin();
for (u8 i = 0; i < 4; i++) {
video::SColor c = encode_light(li[i], tile.emissive_light);
if (!tile.emissive_light)
applyFacesShading(c, normal);
face.vertices[i] = video::S3DVertex(vertex_pos[i], normal, c, f[i]);
}
/*
Revert triangles for nicer looking gradient if the
brightness of vertices 1 and 3 differ less than
the brightness of vertices 0 and 2.
*/
face.vertex_0_2_connected = vertex_0_2_connected;
face.tile = tile;
}
/*
Nodes make a face if contents differ and solidness differs.
Return value:
0: No face
1: Face uses m1's content
2: Face uses m2's content
equivalent: Whether the blocks share the same face (eg. water and glass)
TODO: Add 3: Both faces drawn with backface culling, remove equivalent
*/
static u8 face_contents(content_t m1, content_t m2, bool *equivalent,
const NodeDefManager *ndef)
{
*equivalent = false;
if (m1 == m2 || m1 == CONTENT_IGNORE || m2 == CONTENT_IGNORE)
return 0;
const ContentFeatures &f1 = ndef->get(m1);
const ContentFeatures &f2 = ndef->get(m2);
// Contents don't differ for different forms of same liquid
if (f1.sameLiquid(f2))
return 0;
u8 c1 = f1.solidness;
u8 c2 = f2.solidness;
if (c1 == c2)
return 0;
if (c1 == 0)
c1 = f1.visual_solidness;
else if (c2 == 0)
c2 = f2.visual_solidness;
if (c1 == c2) {
*equivalent = true;
// If same solidness, liquid takes precense
if (f1.isLiquid())
return 1;
if (f2.isLiquid())
return 2;
}
if (c1 > c2)
return 1;
return 2;
}
/*
Gets nth node tile (0 <= n <= 5).
*/
void getNodeTileN(MapNode mn, const v3s16 &p, u8 tileindex, MeshMakeData *data, TileSpec &tile)
{
const NodeDefManager *ndef = data->m_client->ndef();
const ContentFeatures &f = ndef->get(mn);
tile = f.tiles[tileindex];
bool has_crack = p == data->m_crack_pos_relative;
for (TileLayer &layer : tile.layers) {
if (layer.texture_id == 0)
continue;
if (!layer.has_color)
mn.getColor(f, &(layer.color));
// Apply temporary crack
if (has_crack)
layer.material_flags |= MATERIAL_FLAG_CRACK;
}
}
/*
Gets node tile given a face direction.
*/
void getNodeTile(MapNode mn, const v3s16 &p, const v3s16 &dir, MeshMakeData *data, TileSpec &tile)
{
const NodeDefManager *ndef = data->m_client->ndef();
// Direction must be (1,0,0), (-1,0,0), (0,1,0), (0,-1,0),
// (0,0,1), (0,0,-1) or (0,0,0)
assert(dir.X * dir.X + dir.Y * dir.Y + dir.Z * dir.Z <= 1);
// Convert direction to single integer for table lookup
// 0 = (0,0,0)
// 1 = (1,0,0)
// 2 = (0,1,0)
// 3 = (0,0,1)
// 4 = invalid, treat as (0,0,0)
// 5 = (0,0,-1)
// 6 = (0,-1,0)
// 7 = (-1,0,0)
u8 dir_i = ((dir.X + 2 * dir.Y + 3 * dir.Z) & 7) * 2;
// Get rotation for things like chests
u8 facedir = mn.getFaceDir(ndef, true);
static const u16 dir_to_tile[24 * 16] =
{
// 0 +X +Y +Z -Z -Y -X -> value=tile,rotation
0,0, 2,0 , 0,0 , 4,0 , 0,0, 5,0 , 1,0 , 3,0 , // rotate around y+ 0 - 3
0,0, 4,0 , 0,3 , 3,0 , 0,0, 2,0 , 1,1 , 5,0 ,
0,0, 3,0 , 0,2 , 5,0 , 0,0, 4,0 , 1,2 , 2,0 ,
0,0, 5,0 , 0,1 , 2,0 , 0,0, 3,0 , 1,3 , 4,0 ,
0,0, 2,3 , 5,0 , 0,2 , 0,0, 1,0 , 4,2 , 3,1 , // rotate around z+ 4 - 7
0,0, 4,3 , 2,0 , 0,1 , 0,0, 1,1 , 3,2 , 5,1 ,
0,0, 3,3 , 4,0 , 0,0 , 0,0, 1,2 , 5,2 , 2,1 ,
0,0, 5,3 , 3,0 , 0,3 , 0,0, 1,3 , 2,2 , 4,1 ,
0,0, 2,1 , 4,2 , 1,2 , 0,0, 0,0 , 5,0 , 3,3 , // rotate around z- 8 - 11
0,0, 4,1 , 3,2 , 1,3 , 0,0, 0,3 , 2,0 , 5,3 ,
0,0, 3,1 , 5,2 , 1,0 , 0,0, 0,2 , 4,0 , 2,3 ,
0,0, 5,1 , 2,2 , 1,1 , 0,0, 0,1 , 3,0 , 4,3 ,
0,0, 0,3 , 3,3 , 4,1 , 0,0, 5,3 , 2,3 , 1,3 , // rotate around x+ 12 - 15
0,0, 0,2 , 5,3 , 3,1 , 0,0, 2,3 , 4,3 , 1,0 ,
0,0, 0,1 , 2,3 , 5,1 , 0,0, 4,3 , 3,3 , 1,1 ,
0,0, 0,0 , 4,3 , 2,1 , 0,0, 3,3 , 5,3 , 1,2 ,
0,0, 1,1 , 2,1 , 4,3 , 0,0, 5,1 , 3,1 , 0,1 , // rotate around x- 16 - 19
0,0, 1,2 , 4,1 , 3,3 , 0,0, 2,1 , 5,1 , 0,0 ,
0,0, 1,3 , 3,1 , 5,3 , 0,0, 4,1 , 2,1 , 0,3 ,
0,0, 1,0 , 5,1 , 2,3 , 0,0, 3,1 , 4,1 , 0,2 ,
0,0, 3,2 , 1,2 , 4,2 , 0,0, 5,2 , 0,2 , 2,2 , // rotate around y- 20 - 23
0,0, 5,2 , 1,3 , 3,2 , 0,0, 2,2 , 0,1 , 4,2 ,
0,0, 2,2 , 1,0 , 5,2 , 0,0, 4,2 , 0,0 , 3,2 ,
0,0, 4,2 , 1,1 , 2,2 , 0,0, 3,2 , 0,3 , 5,2
};
u16 tile_index = facedir * 16 + dir_i;
getNodeTileN(mn, p, dir_to_tile[tile_index], data, tile);
tile.rotation = tile.world_aligned ? 0 : dir_to_tile[tile_index + 1];
}
static void getTileInfo(
// Input:
MeshMakeData *data,
const v3s16 &p,
const v3s16 &face_dir,
// Output:
bool &makes_face,
v3s16 &p_corrected,
v3s16 &face_dir_corrected,
u16 *lights,
u8 &waving,
TileSpec &tile
)
{
VoxelManipulator &vmanip = data->m_vmanip;
const NodeDefManager *ndef = data->m_client->ndef();
v3s16 blockpos_nodes = data->m_blockpos * MAP_BLOCKSIZE;
const MapNode &n0 = vmanip.getNodeRefUnsafe(blockpos_nodes + p);
// Don't even try to get n1 if n0 is already CONTENT_IGNORE
if (n0.getContent() == CONTENT_IGNORE) {
makes_face = false;
return;
}
const MapNode &n1 = vmanip.getNodeRefUnsafeCheckFlags(blockpos_nodes + p + face_dir);
if (n1.getContent() == CONTENT_IGNORE) {
makes_face = false;
return;
}
// This is hackish
bool equivalent = false;
u8 mf = face_contents(n0.getContent(), n1.getContent(),
&equivalent, ndef);
if (mf == 0) {
makes_face = false;
return;
}
makes_face = true;
MapNode n = n0;
if (mf == 1) {
p_corrected = p;
face_dir_corrected = face_dir;
} else {
n = n1;
p_corrected = p + face_dir;
face_dir_corrected = -face_dir;
}
getNodeTile(n, p_corrected, face_dir_corrected, data, tile);
const ContentFeatures &f = ndef->get(n);
waving = f.waving;
tile.emissive_light = f.light_source;
// eg. water and glass
if (equivalent) {
for (TileLayer &layer : tile.layers)
layer.material_flags |= MATERIAL_FLAG_BACKFACE_CULLING;
}
if (!data->m_smooth_lighting) {
lights[0] = lights[1] = lights[2] = lights[3] =
getFaceLight(n0, n1, face_dir, ndef);
} else {
v3s16 vertex_dirs[4];
getNodeVertexDirs(face_dir_corrected, vertex_dirs);
v3s16 light_p = blockpos_nodes + p_corrected;
for (u16 i = 0; i < 4; i++)
lights[i] = getSmoothLightSolid(light_p, face_dir_corrected, vertex_dirs[i], data);
}
}
/*
startpos:
translate_dir: unit vector with only one of x, y or z
face_dir: unit vector with only one of x, y or z
*/
static void updateFastFaceRow(
MeshMakeData *data,
const v3s16 &&startpos,
v3s16 translate_dir,
const v3f &&translate_dir_f,
const v3s16 &&face_dir,
std::vector<FastFace> &dest)
{
static thread_local const bool waving_liquids =
g_settings->getBool("enable_shaders") &&
g_settings->getBool("enable_waving_water");
v3s16 p = startpos;
u16 continuous_tiles_count = 1;
bool makes_face = false;
v3s16 p_corrected;
v3s16 face_dir_corrected;
u16 lights[4] = {0, 0, 0, 0};
u8 waving = 0;
TileSpec tile;
// Get info of first tile
getTileInfo(data, p, face_dir,
makes_face, p_corrected, face_dir_corrected,
lights, waving, tile);
// Unroll this variable which has a significant build cost
TileSpec next_tile;
for (u16 j = 0; j < MAP_BLOCKSIZE; j++) {
// If tiling can be done, this is set to false in the next step
bool next_is_different = true;
bool next_makes_face = false;
v3s16 next_p_corrected;
v3s16 next_face_dir_corrected;
u16 next_lights[4] = {0, 0, 0, 0};
// If at last position, there is nothing to compare to and
// the face must be drawn anyway
if (j != MAP_BLOCKSIZE - 1) {
p += translate_dir;
getTileInfo(data, p, face_dir,
next_makes_face, next_p_corrected,
next_face_dir_corrected, next_lights,
waving,
next_tile);
if (next_makes_face == makes_face
&& next_p_corrected == p_corrected + translate_dir
&& next_face_dir_corrected == face_dir_corrected
&& memcmp(next_lights, lights, sizeof(lights)) == 0
// Don't apply fast faces to waving water.
&& (waving != 3 || !waving_liquids)
&& next_tile.isTileable(tile)) {
next_is_different = false;
continuous_tiles_count++;
}
}
if (next_is_different) {
/*
Create a face if there should be one
*/
if (makes_face) {
// Floating point conversion of the position vector
v3f pf(p_corrected.X, p_corrected.Y, p_corrected.Z);
// Center point of face (kind of)
v3f sp = pf - ((f32)continuous_tiles_count * 0.5f - 0.5f)
* translate_dir_f;
v3f scale(1, 1, 1);
if (translate_dir.X != 0)
scale.X = continuous_tiles_count;
if (translate_dir.Y != 0)
scale.Y = continuous_tiles_count;
if (translate_dir.Z != 0)
scale.Z = continuous_tiles_count;
makeFastFace(tile, lights[0], lights[1], lights[2], lights[3],
pf, sp, face_dir_corrected, scale, dest);
g_profiler->avg("Meshgen: Tiles per face [#]", continuous_tiles_count);
}
continuous_tiles_count = 1;
}
makes_face = next_makes_face;
p_corrected = next_p_corrected;
face_dir_corrected = next_face_dir_corrected;
memcpy(lights, next_lights, sizeof(lights));
if (next_is_different)
tile = std::move(next_tile); // faster than copy
}
}
static void updateAllFastFaceRows(MeshMakeData *data,
std::vector<FastFace> &dest)
{
/*
Go through every y,z and get top(y+) faces in rows of x+
*/
for (s16 y = 0; y < MAP_BLOCKSIZE; y++)
for (s16 z = 0; z < MAP_BLOCKSIZE; z++)
updateFastFaceRow(data,
v3s16(0, y, z),
v3s16(1, 0, 0), //dir
v3f (1, 0, 0),
v3s16(0, 1, 0), //face dir
dest);
/*
Go through every x,y and get right(x+) faces in rows of z+
*/
for (s16 x = 0; x < MAP_BLOCKSIZE; x++)
for (s16 y = 0; y < MAP_BLOCKSIZE; y++)
updateFastFaceRow(data,
v3s16(x, y, 0),
v3s16(0, 0, 1), //dir
v3f (0, 0, 1),
v3s16(1, 0, 0), //face dir
dest);
/*
Go through every y,z and get back(z+) faces in rows of x+
*/
for (s16 z = 0; z < MAP_BLOCKSIZE; z++)
for (s16 y = 0; y < MAP_BLOCKSIZE; y++)
updateFastFaceRow(data,
v3s16(0, y, z),
v3s16(1, 0, 0), //dir
v3f (1, 0, 0),
v3s16(0, 0, 1), //face dir
dest);
}
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);
}
}