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content_mapblock.cpp
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content_mapblock.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 <cmath>
#include "content_mapblock.h"
#include "util/numeric.h"
#include "util/directiontables.h"
#include "mapblock_mesh.h"
#include "settings.h"
#include "nodedef.h"
#include "client/tile.h"
#include "mesh.h"
#include <IMeshManipulator.h>
#include "client/meshgen/collector.h"
#include "client/renderingengine.h"
#include "client.h"
#include "noise.h"
// Distance of light extrapolation (for oversized nodes)
// After this distance, it gives up and considers light level constant
#define SMOOTH_LIGHTING_OVERSIZE 1.0
// Node edge count (for glasslike-framed)
#define FRAMED_EDGE_COUNT 12
// Node neighbor count, including edge-connected, but not vertex-connected
// (for glasslike-framed)
// Corresponding offsets are listed in g_27dirs
#define FRAMED_NEIGHBOR_COUNT 18
static const v3s16 light_dirs[8] = {
v3s16(-1, -1, -1),
v3s16(-1, -1, 1),
v3s16(-1, 1, -1),
v3s16(-1, 1, 1),
v3s16( 1, -1, -1),
v3s16( 1, -1, 1),
v3s16( 1, 1, -1),
v3s16( 1, 1, 1),
};
// Standard index set to make a quad on 4 vertices
static constexpr u16 quad_indices[] = {0, 1, 2, 2, 3, 0};
const std::string MapblockMeshGenerator::raillike_groupname = "connect_to_raillike";
MapblockMeshGenerator::MapblockMeshGenerator(MeshMakeData *input, MeshCollector *output,
scene::IMeshManipulator *mm):
data(input),
collector(output),
nodedef(data->m_client->ndef()),
meshmanip(mm),
blockpos_nodes(data->m_blockpos * MAP_BLOCKSIZE)
{
enable_mesh_cache = g_settings->getBool("enable_mesh_cache") &&
!data->m_smooth_lighting; // Mesh cache is not supported with smooth lighting
}
void MapblockMeshGenerator::useTile(int index, u8 set_flags, u8 reset_flags, bool special)
{
if (special)
getSpecialTile(index, &tile, p == data->m_crack_pos_relative);
else
getTile(index, &tile);
if (!data->m_smooth_lighting)
color = encode_light(light, f->light_source);
for (auto &layer : tile.layers) {
layer.material_flags |= set_flags;
layer.material_flags &= ~reset_flags;
}
}
// Returns a tile, ready for use, non-rotated.
void MapblockMeshGenerator::getTile(int index, TileSpec *tile)
{
getNodeTileN(n, p, index, data, *tile);
}
// Returns a tile, ready for use, rotated according to the node facedir.
void MapblockMeshGenerator::getTile(v3s16 direction, TileSpec *tile)
{
getNodeTile(n, p, direction, data, *tile);
}
// Returns a special tile, ready for use, non-rotated.
void MapblockMeshGenerator::getSpecialTile(int index, TileSpec *tile, bool apply_crack)
{
*tile = f->special_tiles[index];
TileLayer *top_layer = nullptr;
for (auto &layernum : tile->layers) {
TileLayer *layer = &layernum;
if (layer->texture_id == 0)
continue;
top_layer = layer;
if (!layer->has_color)
n.getColor(*f, &layer->color);
}
if (apply_crack)
top_layer->material_flags |= MATERIAL_FLAG_CRACK;
}
void MapblockMeshGenerator::drawQuad(v3f *coords, const v3s16 &normal,
float vertical_tiling)
{
const v2f tcoords[4] = {v2f(0.0, 0.0), v2f(1.0, 0.0),
v2f(1.0, vertical_tiling), v2f(0.0, vertical_tiling)};
video::S3DVertex vertices[4];
bool shade_face = !f->light_source && (normal != v3s16(0, 0, 0));
v3f normal2(normal.X, normal.Y, normal.Z);
for (int j = 0; j < 4; j++) {
vertices[j].Pos = coords[j] + origin;
vertices[j].Normal = normal2;
if (data->m_smooth_lighting)
vertices[j].Color = blendLightColor(coords[j]);
else
vertices[j].Color = color;
if (shade_face)
applyFacesShading(vertices[j].Color, normal2);
vertices[j].TCoords = tcoords[j];
}
collector->append(tile, vertices, 4, quad_indices, 6);
}
// Create a cuboid.
// tiles - the tiles (materials) to use (for all 6 faces)
// tilecount - number of entries in tiles, 1<=tilecount<=6
// lights - vertex light levels. The order is the same as in light_dirs.
// NULL may be passed if smooth lighting is disabled.
// txc - texture coordinates - this is a list of texture coordinates
// for the opposite corners of each face - therefore, there
// should be (2+2)*6=24 values in the list. The order of
// the faces in the list is up-down-right-left-back-front
// (compatible with ContentFeatures).
// mask - a bit mask that suppresses drawing of tiles.
// tile i will not be drawn if mask & (1 << i) is 1
void MapblockMeshGenerator::drawCuboid(const aabb3f &box,
TileSpec *tiles, int tilecount, const LightInfo *lights, const f32 *txc, u8 mask)
{
assert(tilecount >= 1 && tilecount <= 6); // pre-condition
v3f min = box.MinEdge;
v3f max = box.MaxEdge;
video::SColor colors[6];
if (!data->m_smooth_lighting) {
for (int face = 0; face != 6; ++face) {
colors[face] = encode_light(light, f->light_source);
}
if (!f->light_source) {
applyFacesShading(colors[0], v3f(0, 1, 0));
applyFacesShading(colors[1], v3f(0, -1, 0));
applyFacesShading(colors[2], v3f(1, 0, 0));
applyFacesShading(colors[3], v3f(-1, 0, 0));
applyFacesShading(colors[4], v3f(0, 0, 1));
applyFacesShading(colors[5], v3f(0, 0, -1));
}
}
video::S3DVertex vertices[24] = {
// top
video::S3DVertex(min.X, max.Y, max.Z, 0, 1, 0, colors[0], txc[0], txc[1]),
video::S3DVertex(max.X, max.Y, max.Z, 0, 1, 0, colors[0], txc[2], txc[1]),
video::S3DVertex(max.X, max.Y, min.Z, 0, 1, 0, colors[0], txc[2], txc[3]),
video::S3DVertex(min.X, max.Y, min.Z, 0, 1, 0, colors[0], txc[0], txc[3]),
// bottom
video::S3DVertex(min.X, min.Y, min.Z, 0, -1, 0, colors[1], txc[4], txc[5]),
video::S3DVertex(max.X, min.Y, min.Z, 0, -1, 0, colors[1], txc[6], txc[5]),
video::S3DVertex(max.X, min.Y, max.Z, 0, -1, 0, colors[1], txc[6], txc[7]),
video::S3DVertex(min.X, min.Y, max.Z, 0, -1, 0, colors[1], txc[4], txc[7]),
// right
video::S3DVertex(max.X, max.Y, min.Z, 1, 0, 0, colors[2], txc[ 8], txc[9]),
video::S3DVertex(max.X, max.Y, max.Z, 1, 0, 0, colors[2], txc[10], txc[9]),
video::S3DVertex(max.X, min.Y, max.Z, 1, 0, 0, colors[2], txc[10], txc[11]),
video::S3DVertex(max.X, min.Y, min.Z, 1, 0, 0, colors[2], txc[ 8], txc[11]),
// left
video::S3DVertex(min.X, max.Y, max.Z, -1, 0, 0, colors[3], txc[12], txc[13]),
video::S3DVertex(min.X, max.Y, min.Z, -1, 0, 0, colors[3], txc[14], txc[13]),
video::S3DVertex(min.X, min.Y, min.Z, -1, 0, 0, colors[3], txc[14], txc[15]),
video::S3DVertex(min.X, min.Y, max.Z, -1, 0, 0, colors[3], txc[12], txc[15]),
// back
video::S3DVertex(max.X, max.Y, max.Z, 0, 0, 1, colors[4], txc[16], txc[17]),
video::S3DVertex(min.X, max.Y, max.Z, 0, 0, 1, colors[4], txc[18], txc[17]),
video::S3DVertex(min.X, min.Y, max.Z, 0, 0, 1, colors[4], txc[18], txc[19]),
video::S3DVertex(max.X, min.Y, max.Z, 0, 0, 1, colors[4], txc[16], txc[19]),
// front
video::S3DVertex(min.X, max.Y, min.Z, 0, 0, -1, colors[5], txc[20], txc[21]),
video::S3DVertex(max.X, max.Y, min.Z, 0, 0, -1, colors[5], txc[22], txc[21]),
video::S3DVertex(max.X, min.Y, min.Z, 0, 0, -1, colors[5], txc[22], txc[23]),
video::S3DVertex(min.X, min.Y, min.Z, 0, 0, -1, colors[5], txc[20], txc[23]),
};
static const u8 light_indices[24] = {
3, 7, 6, 2,
0, 4, 5, 1,
6, 7, 5, 4,
3, 2, 0, 1,
7, 3, 1, 5,
2, 6, 4, 0
};
for (int face = 0; face < 6; face++) {
int tileindex = MYMIN(face, tilecount - 1);
const TileSpec &tile = tiles[tileindex];
for (int j = 0; j < 4; j++) {
video::S3DVertex &vertex = vertices[face * 4 + j];
v2f &tcoords = vertex.TCoords;
switch (tile.rotation) {
case 0:
break;
case 1: // R90
tcoords.rotateBy(90, irr::core::vector2df(0, 0));
break;
case 2: // R180
tcoords.rotateBy(180, irr::core::vector2df(0, 0));
break;
case 3: // R270
tcoords.rotateBy(270, irr::core::vector2df(0, 0));
break;
case 4: // FXR90
tcoords.X = 1.0 - tcoords.X;
tcoords.rotateBy(90, irr::core::vector2df(0, 0));
break;
case 5: // FXR270
tcoords.X = 1.0 - tcoords.X;
tcoords.rotateBy(270, irr::core::vector2df(0, 0));
break;
case 6: // FYR90
tcoords.Y = 1.0 - tcoords.Y;
tcoords.rotateBy(90, irr::core::vector2df(0, 0));
break;
case 7: // FYR270
tcoords.Y = 1.0 - tcoords.Y;
tcoords.rotateBy(270, irr::core::vector2df(0, 0));
break;
case 8: // FX
tcoords.X = 1.0 - tcoords.X;
break;
case 9: // FY
tcoords.Y = 1.0 - tcoords.Y;
break;
default:
break;
}
}
}
if (data->m_smooth_lighting) {
for (int j = 0; j < 24; ++j) {
video::S3DVertex &vertex = vertices[j];
vertex.Color = encode_light(
lights[light_indices[j]].getPair(MYMAX(0.0f, vertex.Normal.Y)),
f->light_source);
if (!f->light_source)
applyFacesShading(vertex.Color, vertex.Normal);
}
}
// Add to mesh collector
for (int k = 0; k < 6; ++k) {
if (mask & (1 << k))
continue;
int tileindex = MYMIN(k, tilecount - 1);
collector->append(tiles[tileindex], vertices + 4 * k, 4, quad_indices, 6);
}
}
// Gets the base lighting values for a node
void MapblockMeshGenerator::getSmoothLightFrame()
{
for (int k = 0; k < 8; ++k)
frame.sunlight[k] = false;
for (int k = 0; k < 8; ++k) {
LightPair light(getSmoothLightTransparent(blockpos_nodes + p, light_dirs[k], data));
frame.lightsDay[k] = light.lightDay;
frame.lightsNight[k] = light.lightNight;
// If there is direct sunlight and no ambient occlusion at some corner,
// mark the vertical edge (top and bottom corners) containing it.
if (light.lightDay == 255) {
frame.sunlight[k] = true;
frame.sunlight[k ^ 2] = true;
}
}
}
// Calculates vertex light level
// vertex_pos - vertex position in the node (coordinates are clamped to [0.0, 1.0] or so)
LightInfo MapblockMeshGenerator::blendLight(const v3f &vertex_pos)
{
// Light levels at (logical) node corners are known. Here,
// trilinear interpolation is used to calculate light level
// at a given point in the node.
f32 x = core::clamp(vertex_pos.X / BS + 0.5, 0.0 - SMOOTH_LIGHTING_OVERSIZE, 1.0 + SMOOTH_LIGHTING_OVERSIZE);
f32 y = core::clamp(vertex_pos.Y / BS + 0.5, 0.0 - SMOOTH_LIGHTING_OVERSIZE, 1.0 + SMOOTH_LIGHTING_OVERSIZE);
f32 z = core::clamp(vertex_pos.Z / BS + 0.5, 0.0 - SMOOTH_LIGHTING_OVERSIZE, 1.0 + SMOOTH_LIGHTING_OVERSIZE);
f32 lightDay = 0.0; // daylight
f32 lightNight = 0.0;
f32 lightBoosted = 0.0; // daylight + direct sunlight, if any
for (int k = 0; k < 8; ++k) {
f32 dx = (k & 4) ? x : 1 - x;
f32 dy = (k & 2) ? y : 1 - y;
f32 dz = (k & 1) ? z : 1 - z;
// Use direct sunlight (255), if any; use daylight otherwise.
f32 light_boosted = frame.sunlight[k] ? 255 : frame.lightsDay[k];
lightDay += dx * dy * dz * frame.lightsDay[k];
lightNight += dx * dy * dz * frame.lightsNight[k];
lightBoosted += dx * dy * dz * light_boosted;
}
return LightInfo{lightDay, lightNight, lightBoosted};
}
// Calculates vertex color to be used in mapblock mesh
// vertex_pos - vertex position in the node (coordinates are clamped to [0.0, 1.0] or so)
// tile_color - node's tile color
video::SColor MapblockMeshGenerator::blendLightColor(const v3f &vertex_pos)
{
LightInfo light = blendLight(vertex_pos);
return encode_light(light.getPair(), f->light_source);
}
video::SColor MapblockMeshGenerator::blendLightColor(const v3f &vertex_pos,
const v3f &vertex_normal)
{
LightInfo light = blendLight(vertex_pos);
video::SColor color = encode_light(light.getPair(MYMAX(0.0f, vertex_normal.Y)), f->light_source);
if (!f->light_source)
applyFacesShading(color, vertex_normal);
return color;
}
void MapblockMeshGenerator::generateCuboidTextureCoords(const aabb3f &box, f32 *coords)
{
f32 tx1 = (box.MinEdge.X / BS) + 0.5;
f32 ty1 = (box.MinEdge.Y / BS) + 0.5;
f32 tz1 = (box.MinEdge.Z / BS) + 0.5;
f32 tx2 = (box.MaxEdge.X / BS) + 0.5;
f32 ty2 = (box.MaxEdge.Y / BS) + 0.5;
f32 tz2 = (box.MaxEdge.Z / BS) + 0.5;
f32 txc[24] = {
tx1, 1 - tz2, tx2, 1 - tz1, // up
tx1, tz1, tx2, tz2, // down
tz1, 1 - ty2, tz2, 1 - ty1, // right
1 - tz2, 1 - ty2, 1 - tz1, 1 - ty1, // left
1 - tx2, 1 - ty2, 1 - tx1, 1 - ty1, // back
tx1, 1 - ty2, tx2, 1 - ty1, // front
};
for (int i = 0; i != 24; ++i)
coords[i] = txc[i];
}
void MapblockMeshGenerator::drawAutoLightedCuboid(aabb3f box, const f32 *txc,
TileSpec *tiles, int tile_count, u8 mask)
{
bool scale = std::fabs(f->visual_scale - 1.0f) > 1e-3f;
f32 texture_coord_buf[24];
f32 dx1 = box.MinEdge.X;
f32 dy1 = box.MinEdge.Y;
f32 dz1 = box.MinEdge.Z;
f32 dx2 = box.MaxEdge.X;
f32 dy2 = box.MaxEdge.Y;
f32 dz2 = box.MaxEdge.Z;
if (scale) {
if (!txc) { // generate texture coords before scaling
generateCuboidTextureCoords(box, texture_coord_buf);
txc = texture_coord_buf;
}
box.MinEdge *= f->visual_scale;
box.MaxEdge *= f->visual_scale;
}
box.MinEdge += origin;
box.MaxEdge += origin;
if (!txc) {
generateCuboidTextureCoords(box, texture_coord_buf);
txc = texture_coord_buf;
}
if (!tiles) {
tiles = &tile;
tile_count = 1;
}
if (data->m_smooth_lighting) {
LightInfo lights[8];
for (int j = 0; j < 8; ++j) {
v3f d;
d.X = (j & 4) ? dx2 : dx1;
d.Y = (j & 2) ? dy2 : dy1;
d.Z = (j & 1) ? dz2 : dz1;
lights[j] = blendLight(d);
}
drawCuboid(box, tiles, tile_count, lights, txc, mask);
} else {
drawCuboid(box, tiles, tile_count, nullptr, txc, mask);
}
}
u8 MapblockMeshGenerator::getNodeBoxMask(aabb3f box, u8 solid_neighbors, u8 sametype_neighbors) const
{
const f32 NODE_BOUNDARY = 0.5 * BS;
// For an oversized nodebox, return immediately
if (box.MaxEdge.X > NODE_BOUNDARY ||
box.MinEdge.X < -NODE_BOUNDARY ||
box.MaxEdge.Y > NODE_BOUNDARY ||
box.MinEdge.Y < -NODE_BOUNDARY ||
box.MaxEdge.Z > NODE_BOUNDARY ||
box.MinEdge.Z < -NODE_BOUNDARY)
return 0;
// We can skip faces at node boundary if the matching neighbor is solid
u8 solid_mask =
(box.MaxEdge.Y == NODE_BOUNDARY ? 1 : 0) |
(box.MinEdge.Y == -NODE_BOUNDARY ? 2 : 0) |
(box.MaxEdge.X == NODE_BOUNDARY ? 4 : 0) |
(box.MinEdge.X == -NODE_BOUNDARY ? 8 : 0) |
(box.MaxEdge.Z == NODE_BOUNDARY ? 16 : 0) |
(box.MinEdge.Z == -NODE_BOUNDARY ? 32 : 0);
u8 sametype_mask = 0;
if (f->alpha == AlphaMode::ALPHAMODE_OPAQUE) {
// In opaque nodeboxes, faces on opposite sides can cancel
// each other out if there is a matching neighbor of the same type
sametype_mask =
((solid_mask & 3) == 3 ? 3 : 0) |
((solid_mask & 12) == 12 ? 12 : 0) |
((solid_mask & 48) == 48 ? 48 : 0);
}
// Combine masks with actual neighbors to get the faces to be skipped
return (solid_mask & solid_neighbors) | (sametype_mask & sametype_neighbors);
}
void MapblockMeshGenerator::prepareLiquidNodeDrawing()
{
getSpecialTile(0, &tile_liquid_top);
getSpecialTile(1, &tile_liquid);
MapNode ntop = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(p.X, p.Y + 1, p.Z));
MapNode nbottom = data->m_vmanip.getNodeNoEx(blockpos_nodes + v3s16(p.X, p.Y - 1, p.Z));
c_flowing = f->liquid_alternative_flowing_id;
c_source = f->liquid_alternative_source_id;
top_is_same_liquid = (ntop.getContent() == c_flowing) || (ntop.getContent() == c_source);
draw_liquid_bottom = (nbottom.getContent() != c_flowing) && (nbottom.getContent() != c_source);
if (draw_liquid_bottom) {
const ContentFeatures &f2 = nodedef->get(nbottom.getContent());
if (f2.solidness > 1)
draw_liquid_bottom = false;
}
if (data->m_smooth_lighting)
return; // don't need to pre-compute anything in this case
if (f->light_source != 0) {
// If this liquid emits light and doesn't contain light, draw
// it at what it emits, for an increased effect
u8 e = decode_light(f->light_source);
light = LightPair(std::max(e, light.lightDay), std::max(e, light.lightNight));
} else if (nodedef->getLightingFlags(ntop).has_light) {
// Otherwise, use the light of the node on top if possible
light = LightPair(getInteriorLight(ntop, 0, nodedef));
}
color_liquid_top = encode_light(light, f->light_source);
color = encode_light(light, f->light_source);
}
void MapblockMeshGenerator::getLiquidNeighborhood()
{
u8 range = rangelim(nodedef->get(c_flowing).liquid_range, 1, 8);
for (int w = -1; w <= 1; w++)
for (int u = -1; u <= 1; u++) {
NeighborData &neighbor = liquid_neighbors[w + 1][u + 1];
v3s16 p2 = p + v3s16(u, 0, w);
MapNode n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
neighbor.content = n2.getContent();
neighbor.level = -0.5 * BS;
neighbor.is_same_liquid = false;
neighbor.top_is_same_liquid = false;
if (neighbor.content == CONTENT_IGNORE)
continue;
if (neighbor.content == c_source) {
neighbor.is_same_liquid = true;
neighbor.level = 0.5 * BS;
} else if (neighbor.content == c_flowing) {
neighbor.is_same_liquid = true;
u8 liquid_level = (n2.param2 & LIQUID_LEVEL_MASK);
if (liquid_level <= LIQUID_LEVEL_MAX + 1 - range)
liquid_level = 0;
else
liquid_level -= (LIQUID_LEVEL_MAX + 1 - range);
neighbor.level = (-0.5 + (liquid_level + 0.5) / range) * BS;
}
// Check node above neighbor.
// NOTE: This doesn't get executed if neighbor
// doesn't exist
p2.Y++;
n2 = data->m_vmanip.getNodeNoEx(blockpos_nodes + p2);
if (n2.getContent() == c_source || n2.getContent() == c_flowing)
neighbor.top_is_same_liquid = true;
}
}
void MapblockMeshGenerator::calculateCornerLevels()
{
for (int k = 0; k < 2; k++)
for (int i = 0; i < 2; i++)
corner_levels[k][i] = getCornerLevel(i, k);
}
f32 MapblockMeshGenerator::getCornerLevel(int i, int k)
{
float sum = 0;
int count = 0;
int air_count = 0;
for (int dk = 0; dk < 2; dk++)
for (int di = 0; di < 2; di++) {
NeighborData &neighbor_data = liquid_neighbors[k + dk][i + di];
content_t content = neighbor_data.content;
// If top is liquid, draw starting from top of node
if (neighbor_data.top_is_same_liquid)
return 0.5 * BS;
// Source always has the full height
if (content == c_source)
return 0.5 * BS;
// Flowing liquid has level information
if (content == c_flowing) {
sum += neighbor_data.level;
count++;
} else if (content == CONTENT_AIR) {
air_count++;
}
}
if (air_count >= 2)
return -0.5 * BS + 0.2;
if (count > 0)
return sum / count;
return 0;
}
namespace {
struct LiquidFaceDesc {
v3s16 dir; // XZ
v3s16 p[2]; // XZ only; 1 means +, 0 means -
};
struct UV {
int u, v;
};
static const LiquidFaceDesc liquid_base_faces[4] = {
{v3s16( 1, 0, 0), {v3s16(1, 0, 1), v3s16(1, 0, 0)}},
{v3s16(-1, 0, 0), {v3s16(0, 0, 0), v3s16(0, 0, 1)}},
{v3s16( 0, 0, 1), {v3s16(0, 0, 1), v3s16(1, 0, 1)}},
{v3s16( 0, 0, -1), {v3s16(1, 0, 0), v3s16(0, 0, 0)}},
};
static const UV liquid_base_vertices[4] = {
{0, 1},
{1, 1},
{1, 0},
{0, 0}
};
}
void MapblockMeshGenerator::drawLiquidSides()
{
for (const auto &face : liquid_base_faces) {
const NeighborData &neighbor = liquid_neighbors[face.dir.Z + 1][face.dir.X + 1];
// No face between nodes of the same liquid, unless there is node
// at the top to which it should be connected. Again, unless the face
// there would be inside the liquid
if (neighbor.is_same_liquid) {
if (!top_is_same_liquid)
continue;
if (neighbor.top_is_same_liquid)
continue;
}
const ContentFeatures &neighbor_features = nodedef->get(neighbor.content);
// Don't draw face if neighbor is blocking the view
if (neighbor_features.solidness == 2)
continue;
video::S3DVertex vertices[4];
for (int j = 0; j < 4; j++) {
const UV &vertex = liquid_base_vertices[j];
const v3s16 &base = face.p[vertex.u];
float v = vertex.v;
v3f pos;
pos.X = (base.X - 0.5f) * BS;
pos.Z = (base.Z - 0.5f) * BS;
if (vertex.v) {
pos.Y = neighbor.is_same_liquid ? corner_levels[base.Z][base.X] : -0.5f * BS;
} else if (top_is_same_liquid) {
pos.Y = 0.5f * BS;
} else {
pos.Y = corner_levels[base.Z][base.X];
v += (0.5f * BS - corner_levels[base.Z][base.X]) / BS;
}
if (data->m_smooth_lighting)
color = blendLightColor(pos);
pos += origin;
vertices[j] = video::S3DVertex(pos.X, pos.Y, pos.Z, 0, 0, 0, color, vertex.u, v);
};
collector->append(tile_liquid, vertices, 4, quad_indices, 6);
}
}
void MapblockMeshGenerator::drawLiquidTop()
{
// To get backface culling right, the vertices need to go
// clockwise around the front of the face. And we happened to
// calculate corner levels in exact reverse order.
static const int corner_resolve[4][2] = {{0, 1}, {1, 1}, {1, 0}, {0, 0}};
video::S3DVertex vertices[4] = {
video::S3DVertex(-BS / 2, 0, BS / 2, 0, 0, 0, color_liquid_top, 0, 1),
video::S3DVertex( BS / 2, 0, BS / 2, 0, 0, 0, color_liquid_top, 1, 1),
video::S3DVertex( BS / 2, 0, -BS / 2, 0, 0, 0, color_liquid_top, 1, 0),
video::S3DVertex(-BS / 2, 0, -BS / 2, 0, 0, 0, color_liquid_top, 0, 0),
};
for (int i = 0; i < 4; i++) {
int u = corner_resolve[i][0];
int w = corner_resolve[i][1];
vertices[i].Pos.Y += corner_levels[w][u];
if (data->m_smooth_lighting)
vertices[i].Color = blendLightColor(vertices[i].Pos);
vertices[i].Pos += origin;
}
// Default downwards-flowing texture animation goes from
// -Z towards +Z, thus the direction is +Z.
// Rotate texture to make animation go in flow direction
// Positive if liquid moves towards +Z
f32 dz = (corner_levels[0][0] + corner_levels[0][1]) -
(corner_levels[1][0] + corner_levels[1][1]);
// Positive if liquid moves towards +X
f32 dx = (corner_levels[0][0] + corner_levels[1][0]) -
(corner_levels[0][1] + corner_levels[1][1]);
f32 tcoord_angle = atan2(dz, dx) * core::RADTODEG;
v2f tcoord_center(0.5, 0.5);
v2f tcoord_translate(blockpos_nodes.Z + p.Z, blockpos_nodes.X + p.X);
tcoord_translate.rotateBy(tcoord_angle);
tcoord_translate.X -= floor(tcoord_translate.X);
tcoord_translate.Y -= floor(tcoord_translate.Y);
for (video::S3DVertex &vertex : vertices) {
vertex.TCoords.rotateBy(tcoord_angle, tcoord_center);
vertex.TCoords += tcoord_translate;
}
std::swap(vertices[0].TCoords, vertices[2].TCoords);
collector->append(tile_liquid_top, vertices, 4, quad_indices, 6);
}
void MapblockMeshGenerator::drawLiquidBottom()
{
video::S3DVertex vertices[4] = {
video::S3DVertex(-BS / 2, -BS / 2, -BS / 2, 0, 0, 0, color_liquid_top, 0, 0),
video::S3DVertex( BS / 2, -BS / 2, -BS / 2, 0, 0, 0, color_liquid_top, 1, 0),
video::S3DVertex( BS / 2, -BS / 2, BS / 2, 0, 0, 0, color_liquid_top, 1, 1),
video::S3DVertex(-BS / 2, -BS / 2, BS / 2, 0, 0, 0, color_liquid_top, 0, 1),
};
for (int i = 0; i < 4; i++) {
if (data->m_smooth_lighting)
vertices[i].Color = blendLightColor(vertices[i].Pos);
vertices[i].Pos += origin;
}
collector->append(tile_liquid_top, vertices, 4, quad_indices, 6);
}
void MapblockMeshGenerator::drawLiquidNode()
{
prepareLiquidNodeDrawing();
getLiquidNeighborhood();
calculateCornerLevels();
drawLiquidSides();
if (!top_is_same_liquid)
drawLiquidTop();
if (draw_liquid_bottom)
drawLiquidBottom();
}
void MapblockMeshGenerator::drawGlasslikeNode()
{
useTile(0, 0, 0);
for (int face = 0; face < 6; face++) {
// Check this neighbor
v3s16 dir = g_6dirs[face];
v3s16 neighbor_pos = blockpos_nodes + p + dir;
MapNode neighbor = data->m_vmanip.getNodeNoExNoEmerge(neighbor_pos);
// Don't make face if neighbor is of same type
if (neighbor.getContent() == n.getContent())
continue;
// Face at Z-
v3f vertices[4] = {
v3f(-BS / 2, BS / 2, -BS / 2),
v3f( BS / 2, BS / 2, -BS / 2),
v3f( BS / 2, -BS / 2, -BS / 2),
v3f(-BS / 2, -BS / 2, -BS / 2),
};
for (v3f &vertex : vertices) {
switch (face) {
case D6D_ZP:
vertex.rotateXZBy(180); break;
case D6D_YP:
vertex.rotateYZBy( 90); break;
case D6D_XP:
vertex.rotateXZBy( 90); break;
case D6D_ZN:
vertex.rotateXZBy( 0); break;
case D6D_YN:
vertex.rotateYZBy(-90); break;
case D6D_XN:
vertex.rotateXZBy(-90); break;
}
}
drawQuad(vertices, dir);
}
}
void MapblockMeshGenerator::drawGlasslikeFramedNode()
{
TileSpec tiles[6];
for (int face = 0; face < 6; face++)
getTile(g_6dirs[face], &tiles[face]);
if (!data->m_smooth_lighting)
color = encode_light(light, f->light_source);
TileSpec glass_tiles[6];
for (auto &glass_tile : glass_tiles)
glass_tile = tiles[4];
// Only respect H/V merge bits when paramtype2 = "glasslikeliquidlevel" (liquid tank)
u8 param2 = (f->param_type_2 == CPT2_GLASSLIKE_LIQUID_LEVEL) ? n.getParam2() : 0;
bool H_merge = !(param2 & 128);
bool V_merge = !(param2 & 64);
param2 &= 63;
static const float a = BS / 2.0f;
static const float g = a - 0.03f;
static const float b = 0.876f * (BS / 2.0f);
static const aabb3f frame_edges[FRAMED_EDGE_COUNT] = {
aabb3f( b, b, -a, a, a, a), // y+
aabb3f(-a, b, -a, -b, a, a), // y+
aabb3f( b, -a, -a, a, -b, a), // y-
aabb3f(-a, -a, -a, -b, -b, a), // y-
aabb3f( b, -a, b, a, a, a), // x+
aabb3f( b, -a, -a, a, a, -b), // x+
aabb3f(-a, -a, b, -b, a, a), // x-
aabb3f(-a, -a, -a, -b, a, -b), // x-
aabb3f(-a, b, b, a, a, a), // z+
aabb3f(-a, -a, b, a, -b, a), // z+
aabb3f(-a, -a, -a, a, -b, -b), // z-
aabb3f(-a, b, -a, a, a, -b), // z-
};
// tables of neighbor (connect if same type and merge allowed),
// checked with g_26dirs
// 1 = connect, 0 = face visible
bool nb[FRAMED_NEIGHBOR_COUNT] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
// 1 = check
static const bool check_nb_vertical [FRAMED_NEIGHBOR_COUNT] =
{0,1,0,0,1,0, 0,0,0,0, 0,0,0,0, 0,0,0,0};
static const bool check_nb_horizontal [FRAMED_NEIGHBOR_COUNT] =
{1,0,1,1,0,1, 0,0,0,0, 1,1,1,1, 0,0,0,0};
static const bool check_nb_all [FRAMED_NEIGHBOR_COUNT] =
{1,1,1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1};
const bool *check_nb = check_nb_all;
// neighbors checks for frames visibility
if (H_merge || V_merge) {
if (!H_merge)
check_nb = check_nb_vertical; // vertical-only merge
if (!V_merge)
check_nb = check_nb_horizontal; // horizontal-only merge
content_t current = n.getContent();
for (int i = 0; i < FRAMED_NEIGHBOR_COUNT; i++) {
if (!check_nb[i])
continue;
v3s16 n2p = blockpos_nodes + p + g_26dirs[i];
MapNode n2 = data->m_vmanip.getNodeNoEx(n2p);
content_t n2c = n2.getContent();
if (n2c == current)
nb[i] = 1;
}
}
// edge visibility
static const u8 nb_triplet[FRAMED_EDGE_COUNT][3] = {
{1, 2, 7}, {1, 5, 6}, {4, 2, 15}, {4, 5, 14},
{2, 0, 11}, {2, 3, 13}, {5, 0, 10}, {5, 3, 12},
{0, 1, 8}, {0, 4, 16}, {3, 4, 17}, {3, 1, 9},
};
tile = tiles[1];
for (int edge = 0; edge < FRAMED_EDGE_COUNT; edge++) {
bool edge_invisible;
if (nb[nb_triplet[edge][2]])
edge_invisible = nb[nb_triplet[edge][0]] & nb[nb_triplet[edge][1]];
else
edge_invisible = nb[nb_triplet[edge][0]] ^ nb[nb_triplet[edge][1]];
if (edge_invisible)
continue;
drawAutoLightedCuboid(frame_edges[edge]);
}
for (int face = 0; face < 6; face++) {
if (nb[face])
continue;
tile = glass_tiles[face];
// Face at Z-
v3f vertices[4] = {
v3f(-a, a, -g),
v3f( a, a, -g),
v3f( a, -a, -g),
v3f(-a, -a, -g),
};
for (v3f &vertex : vertices) {
switch (face) {
case D6D_ZP:
vertex.rotateXZBy(180); break;
case D6D_YP:
vertex.rotateYZBy( 90); break;
case D6D_XP:
vertex.rotateXZBy( 90); break;
case D6D_ZN:
vertex.rotateXZBy( 0); break;
case D6D_YN:
vertex.rotateYZBy(-90); break;
case D6D_XN:
vertex.rotateXZBy(-90); break;
}
}
v3s16 dir = g_6dirs[face];
drawQuad(vertices, dir);
}
// Optionally render internal liquid level defined by param2
// Liquid is textured with 1 tile defined in nodedef 'special_tiles'
if (param2 > 0 && f->param_type_2 == CPT2_GLASSLIKE_LIQUID_LEVEL &&
f->special_tiles[0].layers[0].texture) {
// Internal liquid level has param2 range 0 .. 63,
// convert it to -0.5 .. 0.5
float vlev = (param2 / 63.0f) * 2.0f - 1.0f;
getSpecialTile(0, &tile);
drawAutoLightedCuboid(aabb3f(-(nb[5] ? g : b),
-(nb[4] ? g : b),
-(nb[3] ? g : b),
(nb[2] ? g : b),
(nb[1] ? g : b) * vlev,
(nb[0] ? g : b)));
}
}
void MapblockMeshGenerator::drawAllfacesNode()
{
static const aabb3f box(-BS / 2, -BS / 2, -BS / 2, BS / 2, BS / 2, BS / 2);
useTile(0, 0, 0);
drawAutoLightedCuboid(box);
}
void MapblockMeshGenerator::drawTorchlikeNode()
{
u8 wall = n.getWallMounted(nodedef);
u8 tileindex = 0;
switch (wall) {
case DWM_YP: tileindex = 1; break; // ceiling
case DWM_YN: tileindex = 0; break; // floor
default: tileindex = 2; // side (or invalid—should we care?)
}
useTile(tileindex, MATERIAL_FLAG_CRACK_OVERLAY, MATERIAL_FLAG_BACKFACE_CULLING);
float size = BS / 2 * f->visual_scale;
v3f vertices[4] = {
v3f(-size, size, 0),
v3f( size, size, 0),
v3f( size, -size, 0),
v3f(-size, -size, 0),
};
for (v3f &vertex : vertices) {
switch (wall) {
case DWM_YP:
vertex.Y += -size + BS/2;
vertex.rotateXZBy(-45);
break;
case DWM_YN:
vertex.Y += size - BS/2;
vertex.rotateXZBy(45);
break;
case DWM_XP:
vertex.X += -size + BS/2;
break;
case DWM_XN:
vertex.X += -size + BS/2;
vertex.rotateXZBy(180);
break;
case DWM_ZP:
vertex.X += -size + BS/2;
vertex.rotateXZBy(90);
break;
case DWM_ZN:
vertex.X += -size + BS/2;
vertex.rotateXZBy(-90);
}
}
drawQuad(vertices);
}
void MapblockMeshGenerator::drawSignlikeNode()
{
u8 wall = n.getWallMounted(nodedef);
useTile(0, MATERIAL_FLAG_CRACK_OVERLAY, MATERIAL_FLAG_BACKFACE_CULLING);
static const float offset = BS / 16;
float size = BS / 2 * f->visual_scale;
// Wall at X+ of node
v3f vertices[4] = {
v3f(BS / 2 - offset, size, size),
v3f(BS / 2 - offset, size, -size),
v3f(BS / 2 - offset, -size, -size),
v3f(BS / 2 - offset, -size, size),
};
for (v3f &vertex : vertices) {
switch (wall) {
case DWM_YP:
vertex.rotateXYBy( 90); break;
case DWM_YN:
vertex.rotateXYBy(-90); break;
case DWM_XP:
vertex.rotateXZBy( 0); break;
case DWM_XN:
vertex.rotateXZBy(180); break;
case DWM_ZP:
vertex.rotateXZBy( 90); break;
case DWM_ZN:
vertex.rotateXZBy(-90); break;
}
}
drawQuad(vertices);
}
void MapblockMeshGenerator::drawPlantlikeQuad(float rotation, float quad_offset,
bool offset_top_only)
{
v3f vertices[4] = {
v3f(-scale, -BS / 2 + 2.0 * scale * plant_height, 0),
v3f( scale, -BS / 2 + 2.0 * scale * plant_height, 0),
v3f( scale, -BS / 2, 0),
v3f(-scale, -BS / 2, 0),
};
if (random_offset_Y) {
PseudoRandom yrng(face_num++ | p.X << 16 | p.Z << 8 | p.Y << 24);
offset.Y = -BS * ((yrng.next() % 16 / 16.0) * 0.125);
}
int offset_count = offset_top_only ? 2 : 4;
for (int i = 0; i < offset_count; i++)
vertices[i].Z += quad_offset;
for (v3f &vertex : vertices) {
vertex.rotateXZBy(rotation + rotate_degree);
vertex += offset;