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Clifford Wolf: 

Added support for reading DXF blocks



git-svn-id: http://svn.clifford.at/openscad/trunk@123 b57f626f-c46c-0410-a088-ec61d464b74c
stl_dim
clifford 2009-10-28 12:29:58 +00:00
parent 91be6f762e
commit 7da5706088
4 changed files with 2342 additions and 18 deletions
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68
dxfdata.cc
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@ -32,19 +32,33 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
return;
}
QVector<Line> lines;
QList<Line> lines;
Grid2d< QVector<int> > grid;
QHash< QString, QList<Line> > blockdata;
bool in_entities_section = false;
bool in_blocks_section = false;
QString current_block;
#define ADD_LINE(_x1, _y1, _x2, _y2) do { \
double _p1x = _x1, _p1y = _y1, _p2x = _x2, _p2y = _y2; \
if (!in_entities_section && !in_blocks_section) \
break; \
if (in_entities_section && \
!(layername.isNull() || layername == layer)) \
break; \
grid.align(_p1x, _p1y); \
grid.align(_p2x, _p2y); \
grid.data(_p1x, _p1y).append(lines.count()); \
grid.data(_p2x, _p2y).append(lines.count()); \
lines.append(Line(p(_p1x, _p1y), p(_p2x, _p2y))); \
if (in_entities_section) \
lines.append(Line(p(_p1x, _p1y), p(_p2x, _p2y))); \
if (in_blocks_section && !current_block.isNull()) \
blockdata[current_block].append( \
Line(p(_p1x, _p1y), p(_p2x, _p2y))); \
} while (0)
QString mode, layer, name;
QString mode, layer, name, iddata;
int dimtype = 0;
double coords[7][2];
double x1 = 0, x2 = 0, y1 = 0, y2 = 0;
@ -54,7 +68,6 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
for (int j = 0; j < 2; j++)
coords[i][j] = 0;
bool in_entities_section = false;
QHash<QString, int> unsupported_entities_list;
while (!f.atEnd())
@ -85,12 +98,14 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
switch (id)
{
case 0:
if (in_entities_section && mode == "LINE" &&
(layername.isNull() || layername == layer)) {
if (mode == "SECTION") {
in_entities_section = iddata == "ENTITIES";
in_blocks_section = iddata == "BLOCKS";
}
if (mode == "LINE") {
ADD_LINE(x1, y1, x2, y2);
}
if (in_entities_section && mode == "CIRCLE" &&
(layername.isNull() || layername == layer)) {
if (mode == "CIRCLE") {
int n = get_fragments_from_r(radius, fn, fs, fa);
for (int i = 0; i < n; i++) {
double a1 = (2*M_PI*i)/n;
@ -99,8 +114,7 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
cos(a2)*radius + x1, sin(a2)*radius + y1);
}
}
if (in_entities_section && mode == "ARC" &&
(layername.isNull() || layername == layer)) {
if (mode == "ARC") {
int n = get_fragments_from_r(radius, fn, fs, fa);
while (start_angle > stop_angle)
stop_angle += 360.0;
@ -114,7 +128,22 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
cos(a2)*radius + x1, sin(a2)*radius + y1);
}
}
if (in_entities_section && mode == "DIMENSION" &&
if (mode == "INSERT") {
int n = blockdata[iddata].size();
for (int i = 0; i < n; i++) {
double a = -start_angle * M_PI / 180.0;
double lx1 = blockdata[iddata][i].p[0]->x;
double ly1 = blockdata[iddata][i].p[0]->y;
double lx2 = blockdata[iddata][i].p[1]->x;
double ly2 = blockdata[iddata][i].p[1]->y;
double px1 = cos(a)*lx1 + sin(a)*ly1 + x1;
double py1 = sin(a)*lx1 + cos(a)*ly1 + y1;
double px2 = cos(a)*lx2 + sin(a)*ly2 + x1;
double py2 = sin(a)*lx2 + cos(a)*ly2 + y1;
ADD_LINE(px1, py1, px2, py2);
}
}
if (mode == "DIMENSION" &&
(layername.isNull() || layername == layer)) {
dims.append(Dim());
dims.last().type = dimtype;
@ -124,15 +153,23 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
dims.last().angle = start_angle;
dims.last().name = name;
}
if (in_entities_section &&
(layername.isNull() || layername == layer)) {
if (mode == "BLOCK") {
current_block = iddata;
}
if (mode == "ENDBLK") {
current_block = QString();
}
if (in_blocks_section || (in_entities_section &&
(layername.isNull() || layername == layer))) {
if (mode != "SECTION" && mode != "ENDSEC" && mode != "DIMENSION" &&
mode != "LINE" && mode != "ARC" && mode != "CIRCLE")
mode != "LINE" && mode != "ARC" && mode != "CIRCLE" &&
mode != "BLOCK" && mode != "ENDBLK" && mode != "INSERT")
unsupported_entities_list[mode]++;
}
mode = data;
layer = QString();
name = QString();
iddata = QString();
dimtype = 0;
for (int i = 0; i < 7; i++)
for (int j = 0; j < 2; j++)
@ -144,8 +181,7 @@ DxfData::DxfData(double fn, double fs, double fa, QString filename, QString laye
name = data;
break;
case 2:
if (mode == "SECTION")
in_entities_section = data == "ENTITIES";
iddata = data;
break;
case 8:
layer = data;

4
dxflinextrude.cc
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@ -236,10 +236,10 @@ QString DxfLinearExtrudeNode::dump(QString indent) const
memset(&st, 0, sizeof(struct stat));
stat(filename.toAscii().data(), &st);
text.sprintf("dxf_linear_extrude(file = \"%s\", cache = \"%x.%x\", layer = \"%s\", "
"height = %f, origin = [ %f %f ], scale = %f, center = %s",
"height = %f, origin = [ %f %f ], scale = %f, center = %s, convexity = %d",
filename.toAscii().data(), (int)st.st_mtime, (int)st.st_size,
layername.toAscii().data(), height, origin_x, origin_y, scale,
center ? "true" : "false");
center ? "true" : "false", convexity);
if (has_twist) {
QString t2;
t2.sprintf(", twist = %f, slices = %d", twist, slices);

2276
examples/example013.dxf Normal file
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File diff suppressed because it is too large Load Diff

12
examples/example013.scad Normal file
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@ -0,0 +1,12 @@
intersection()
{
dxf_linear_extrude(file = "example013.dxf",
height = 100, center = true, convexity= 3);
rotate([0, 90, 0])
dxf_linear_extrude(file = "example013.dxf",
height = 100, center = true, convexity= 3);
rotate([90, 0, 0])
dxf_linear_extrude(file = "example013.dxf",
height = 100, center = true, convexity= 3);
}