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Add code to generate a ready to use LeafletJS map.

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This commit is contained in:
Martijn Versteegh
2018-11-14 17:43:19 +01:00
committed by Martijn Versteegh
parent bd0c140bfc
commit 503f6b6277
5 changed files with 754 additions and 1 deletions
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106
TileGenerator.cpp
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@ -79,6 +79,7 @@ TileGenerator::TileGenerator():
m_drawScale(false),
m_drawAlpha(false),
m_shading(true),
m_leaflet(false),
m_dontWriteEmpty(false),
m_backend(""),
m_xBorder(0),
@ -179,6 +180,11 @@ void TileGenerator::setShading(bool shading)
m_shading = shading;
}
void TileGenerator::setLeaflet(bool leaflet)
{
m_leaflet = leaflet;
}
void TileGenerator::setBackend(std::string backend)
{
m_backend = backend;
@ -245,6 +251,11 @@ void TileGenerator::setDontWriteEmpty(bool f)
void TileGenerator::generate(const std::string &input, const std::string &output)
{
if (m_leaflet)
{
outputLeafletCode(output);
}
string input_path = input;
if (input_path[input.length() - 1] != PATH_SEPARATOR) {
input_path += PATH_SEPARATOR;
@ -264,6 +275,23 @@ void TileGenerator::generate(const std::string &input, const std::string &output
if (m_tileW < INT_MAX || m_tileH < INT_MAX)
{
int minTileX = 0;
int minTileZ = 0;
int flipY = 1;
if (m_leaflet)
{
// for leaflet tiles, it's nice if the origin is on the corner between tile (-1,-1) and tile (0,0)
m_xMin = round_multiple_nosign(m_xMin, m_tileW);
m_zMin = round_multiple_nosign(m_zMin, m_tileH);
// for some reason the tile indices in leaflet are calculated with -(y/tilesize) while x is calculated with (x/tilesize)
// so in tile indices +y is pointing down, while in map coordinates it is pointing up (go figure, but whatever)
// this means tile 0_0_ is the tile with the origin in the top-left corner.
minTileX = m_xMin / m_tileW;
minTileZ = m_zMin / m_tileH + 1;
flipY = -1;
}
tilePositions();
int trueXMin = m_xMin;
@ -294,14 +322,22 @@ void TileGenerator::generate(const std::string &input, const std::string &output
renderPlayers(input_path);
}
ostringstream fn;
fn << x << '_' << y << '_' << output;
fn << x + minTileX << '_' << (flipY * (y + minTileZ)) << '_' << output;
writeImage(fn.str());
}
}
}
if (m_leaflet)
{
ostringstream fn;
fn << "empty_tile_" << output;
m_image->fill(m_bgColor);
writeImage(fn.str());
}
}
else
{
m_image->fill(m_bgColor);
renderMap(m_positions);
if (m_drawScale) {
@ -790,3 +826,71 @@ void TileGenerator::tilePositions()
}
}
static char const *leafletMapHtml =
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>MinetestMapper</title>\n"
" <meta charset=\"utf-8\" />\n"
" <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n"
" <!-- link rel=\"shortcut icon\" type=\"image/x-icon\" href=\"favicon.ico\" /-->\n"
" <link rel=\"stylesheet\" href=\"leaflet.css\" integrity=\"sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA==\" crossorigin=\"\"/>\n"
" <script src=\"leaflet.js\" integrity=\"sha512-nMMmRyTVoLYqjP9hrbed9S+FzjZHW5gY1TWCHA5ckwXZBadntCNs8kEqAWdrb9O7rxbCaA4lKTIWjDXZxflOcA==\" crossorigin=\"\"></script>\n"
"</head>\n"
"<body>\n"
"<div id=\"mapid\" style=\"width: 90vw; height: 90vh;\"></div>\n"
"<script>\n"
" var MineTestMap = L.map('mapid', {\n"
" crs: L.CRS.Simple,\n"
"// minZoom: -3,\n"
" });\n"
" MineTestMap.setView([0.0, 0.0], 0);\n"
" L.tileLayer('{x}_{y}_%s', {\n"
" minNativeZoom: 0,\n"
" maxNativeZoom: 0,\n"
" attribution: 'Minetest World',\n"
" tileSize: %d,\n"
" errorTileUrl: \"empty_tile_%s\",\n"
" }).addTo(MineTestMap);\n"
" var popup = L.popup();\n"
" function onMapClick(e) {\n"
" popup\n"
" .setLatLng(e.latlng)\n"
" .setContent(\"You clicked the map at \"+ e.latlng.toString())\n"
" .openOn(mymap);\n"
" }\n"
" MineTestMap.on('click', onMapClick);\n"
"</script>\n"
"</body>\n"
"</html>\n";
void TileGenerator::outputLeafletCode(std::string const &output)
{
if (m_tileH != m_tileW)
{
throw std::runtime_error("For a leaflet map the tiles must be square!");
return;
}
ostringstream fn;
fn << output << ".html";
// I use fopen instead of ostr because I need fprintf to put the correct values into the
// html static string above. ostream is nice and C++ and all, but formatted output handling
// for streams is retarded. Use the best tool for the job.
FILE *out = fopen(fn.str().c_str(), "w");
if (!out)
{
cout << "error opening file:" << fn.str() << endl;
return;
}
fprintf(out, leafletMapHtml, output.c_str(), m_tileW, output.c_str());
fclose(out);
}