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Support writing SVG to scale

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This commit is contained in:
Thomas Krijnen
2020-08-25 15:01:07 +02:00
parent 34c51fa9be
commit c872ee8844
3 changed files with 50 additions and 10 deletions
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src/serializers/SvgSerializer.cpp
+31 -10
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@@ -706,17 +706,21 @@ void SvgSerializer::finalize() {
const double dx = xmax - xmin;
const double dy = ymax - ymin;
double sc = 1.;
if (dx / width > dy / height) {
sc = width / dx;
double sc, cx, cy;
if (scale_) {
sc = (*scale_) * 1000;
cx = (xmax + xmin) / 2. * sc - width / 2.;
cy = (ymax + ymin) / 2. * sc - height / 2.;
} else {
sc = height / dy;
if (dx / width > dy / height) {
sc = width / dx;
} else {
sc = height / dy;
}
cx = xmin * sc;
cy = ymin * sc;
}
const double cx = xmin * sc;
const double cy = ymin * sc;
{std::vector< boost::shared_ptr<util::string_buffer::float_item> >::const_iterator it;
for (it = xcoords.begin(); it != xcoords.end(); ++it) {
double& v = (*it)->value();
@@ -760,7 +764,15 @@ void SvgSerializer::finalize() {
}
void SvgSerializer::writeHeader() {
svg_file << "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n"
svg_file << "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"";
if (scale_) {
svg_file <<
" width=\"" << width << "mm\""
" height=\"" << height << "mm\"" <<
" viewBox=\"0 0 " << width << " " << height << "\"";
}
svg_file << ">\n"
" <defs>\n"
" <marker id=\"arrowend\" markerWidth=\"10\" markerHeight=\"7\" refX=\"10\" refY=\"3.5\" orient=\"auto\">\n"
" <polygon points=\"0 0, 10 3.5, 0 7\" />\n"
@@ -774,7 +786,16 @@ void SvgSerializer::writeHeader() {
" .IfcAnnotation path {\n"
" marker-end: url(#arrowend);\n"
" marker-start: url(#arrowstart);\n"
" }\n"
" }\n";
if (scale_) {
svg_file <<
" text {\n" // (pt) (px) (in) (mm)
" font-size: 4;\n" // approx 12 / 0.75 / 96 * 25.4
" }\n";
}
svg_file <<
" ]]>\n"
" </style>\n";
}