void Inkscape::LineSnapper::freeSnap(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
bool const &/*f*/,
Geom::OptRect const &/*bbox_to_snap*/,
std::vector<SPItem const *> const */*it*/,
std::vector<Geom::Point> */*unselected_nodes*/) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(t) == false) {
return;
}
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p);
// std::cout << "snap point " << p << " to: " << std::endl;
for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {
Geom::Point const p1 = i->second; // point at guide/grid line
Geom::Point const p2 = p1 + Geom::rot90(i->first); // 2nd point at guide/grid line
// std::cout << " line through " << i->second << " with normal " << i->first;
g_assert(i->first != Geom::Point(0,0)); // we cannot project on an linesegment of zero length
Geom::Point const p_proj = project_on_linesegment(p, p1, p2);
Geom::Coord const dist = Geom::L2(p_proj - p);
//Store any line that's within snapping range
if (dist < getSnapperTolerance()) {
_addSnappedLine(sc, p_proj, dist, i->first, i->second);
// std::cout << " -> distance = " << dist;
}
// std::cout << std::endl;
}
}
void Inkscape::LineSnapper::constrainedSnap(SnappedConstraints &sc,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &/*bbox_to_snap*/,
ConstraintLine const &c,
std::vector<SPItem const *> const */*it*/) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(p.getSourceType()) == false) {
return;
}
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p.getPoint());
for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {
if (Geom::L2(c.getDirection()) > 0) { // Can't do a constrained snap without a constraint
// constraint line
Geom::Point const point_on_line = c.hasPoint() ? c.getPoint() : p.getPoint();
Geom::Line line1(point_on_line, point_on_line + c.getDirection());
// grid/guide line
Geom::Point const p1 = i->second; // point at guide/grid line
Geom::Point const p2 = p1 + Geom::rot90(i->first); // 2nd point at guide/grid line
Geom::Line line2(p1, p2);
Geom::OptCrossing inters = Geom::OptCrossing(); // empty by default
try
{
inters = Geom::intersection(line1, line2);
}
catch (Geom::InfiniteSolutions e)
{
// We're probably dealing with parallel lines, so snapping doesn't make any sense here
continue; // jump to the next iterator in the for-loop
}
if (inters) {
Geom::Point t = line1.pointAt((*inters).ta);
const Geom::Coord dist = Geom::L2(t - p.getPoint());
if (dist < getSnapperTolerance()) {
// When doing a constrained snap, we're already at an intersection.
// This snappoint is therefore fully constrained, so there's no need
// to look for additional intersections; just return the snapped point
// and forget about the line
_addSnappedPoint(sc, t, dist, p.getSourceType(), p.getSourceNum(), true);
// For any line that's within range, we will also look at it's "point on line" p1. For guides
// this point coincides with its origin; for grids this is of no use, but we cannot
// discern between grids and guides here
Geom::Coord const dist_p1 = Geom::L2(p1 - p.getPoint());
if (dist_p1 < getSnapperTolerance()) {
_addSnappedLinesOrigin(sc, p1, dist_p1, p.getSourceType(), p.getSourceNum(), true);
// Only relevant for guides; grids don't have an origin per line
// Therefore _addSnappedLinesOrigin() will only be implemented for guides
}
}
}
}
}
}
// Write file from memory buffer
int WriteOutputFile(LineList &lines, const TCHAR *filename)
{
FILE *f;
LineList::const_iterator it;
f = _wfopen(filename,TEXT("wb+"));
if (f==NULL) return 1;
for (it = lines.begin(); it != lines.end(); ++it) fputs(it->c_str(),f);
fclose(f);
return 0;
}
void Inkscape::LineSnapper::constrainedSnap(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
bool const &/*f*/,
Geom::OptRect const &/*bbox_to_snap*/,
ConstraintLine const &c,
std::vector<SPItem const *> const */*it*/) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(t) == false) {
return;
}
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p);
for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {
if (Geom::L2(c.getDirection()) > 0) { // Can't do a constrained snap without a constraint
/* Normal to the line we're trying to snap along */
Geom::Point const n(Geom::rot90(Geom::unit_vector(c.getDirection())));
Geom::Point const point_on_line = c.hasPoint() ? c.getPoint() : p;
/* Constant term of the line we're trying to snap along */
Geom::Coord const q0 = dot(n, point_on_line);
/* Constant term of the grid or guide line */
Geom::Coord const q1 = dot(i->first, i->second);
/* Try to intersect this line with the target line */
Geom::Point t_2geom(NR_HUGE, NR_HUGE);
Geom::IntersectorKind const k = Geom::line_intersection(n, q0, i->first, q1, t_2geom);
Geom::Point t(t_2geom);
if (k == Geom::intersects) {
const Geom::Coord dist = L2(t - p);
if (dist < getSnapperTolerance()) {
// When doing a constrained snap, we're already at an intersection.
// This snappoint is therefore fully constrained, so there's no need
// to look for additional intersections; just return the snapped point
// and forget about the line
sc.points.push_back(SnappedPoint(t, Inkscape::SNAPTARGET_UNDEFINED, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true));
// The type of the snap target is yet undefined, as we cannot tell whether
// we're snapping to grid or the guide lines; must be set by on a higher level
}
}
}
}
}
void GenerateMD5(LineList &lines, md5generators_t *md5s)
{
md5s->a.Init( 0x63e54c01, 0x25adab89, 0x44baecfe, 0x60f25476 );
md5s->b.Init( 0x41e24d03, 0x23b8ebea, 0x4a4bfc9e, 0x640ed89a );
md5s->c.Init( 0x61e54e01, 0x22cdab89, 0x48b20cfe, 0x62125476 );
md5s->d.Init( 0xc1e84fe8, 0x21d1c28a, 0x438e1a12, 0x6c250aee );
int skipwhitespaces = 1;
LineList::const_iterator it;
for (it = lines.begin(); it != lines.end(); ++it) {
for (unsigned int i=0; i<(it->length()); ++i) {
//Skip whitespaces
if (skipwhitespaces) {
char c = it->c_str()[i];
if (c >= 0x20 && c <= 0x7E &&
c != 0x0D &&
c != 0x0A &&
c != 0x24 &&
c != 0x2A &&
c != 0x2C &&
c != 0x21 &&
c != 0x5C &&
c != 0x5E &&
c != 0x7E) ; else continue;
}
md5s->a.Update((const unsigned char*)it->c_str()+i, 1);
md5s->b.Update((const unsigned char*)it->c_str()+i, 1);
md5s->c.Update((const unsigned char*)it->c_str()+i, 1);
md5s->d.Update((const unsigned char*)it->c_str()+i, 1);
}
}
md5s->a.Final();
md5s->b.Final();
md5s->c.Final();
md5s->d.Final();
}
void Inkscape::LineSnapper::freeSnap(SnappedConstraints &sc,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &/*bbox_to_snap*/,
std::vector<SPItem const *> const */*it*/,
std::vector<Inkscape::SnapCandidatePoint> */*unselected_nodes*/) const
{
if (!(_snap_enabled && _snapmanager->snapprefs.getSnapFrom(p.getSourceType())) ) {
return;
}
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p.getPoint());
for (LineList::const_iterator i = lines.begin(); i != lines.end(); i++) {
Geom::Point const p1 = i->second; // point at guide/grid line
Geom::Point const p2 = p1 + Geom::rot90(i->first); // 2nd point at guide/grid line
// std::cout << " line through " << i->second << " with normal " << i->first;
g_assert(i->first != Geom::Point(0,0)); // we cannot project on an linesegment of zero length
Geom::Point const p_proj = Geom::projection(p.getPoint(), Geom::Line(p1, p2));
Geom::Coord const dist = Geom::L2(p_proj - p.getPoint());
//Store any line that's within snapping range
if (dist < getSnapperTolerance()) {
_addSnappedLine(sc, p_proj, dist, p.getSourceType(), p.getSourceNum(), i->first, i->second);
// For any line that's within range, we will also look at it's "point on line" p1. For guides
// this point coincides with its origin; for grids this is of no use, but we cannot
// discern between grids and guides here
Geom::Coord const dist_p1 = Geom::L2(p1 - p.getPoint());
if (dist_p1 < getSnapperTolerance()) {
_addSnappedLinesOrigin(sc, p1, dist_p1, p.getSourceType(), p.getSourceNum(), false);
// Only relevant for guides; grids don't have an origin per line
// Therefore _addSnappedLinesOrigin() will only be implemented for guides
}
// std::cout << " -> distance = " << dist;
}
// std::cout << std::endl;
}
}
void writeStream(std::ostream &stream, int tabCount)
{
for(ValueMap::iterator vi = values.begin(); vi != values.end(); ++vi)
{
writeTabs(stream, tabCount);
stream << (*vi).first << " = " << (*vi).second.first << std::endl;
}
for(GroupMap::iterator gi = groups.begin(); gi != groups.end(); ++gi)
{
if((gi != groups.begin()) || (!values.empty()))
stream << std::endl;
writeTabs(stream, tabCount);
stream << (*gi).first << std::endl;
writeTabs(stream, tabCount);
stream << "{" << std::endl;
(*gi).second->writeStream(stream, tabCount + 1),
writeTabs(stream, tabCount);
stream << "}" << std::endl;
}
if(!lines.empty() && ((!groups.empty() || !values.empty())))
stream << std::endl;
for(LineList::iterator li = lines.begin(); li != lines.end(); ++li)
{
writeTabs(stream, tabCount);
std::string &f = (*li);
stream << (*li) << std::endl;
}
}
int main(int theArgCount, char ** theArgs)
{
if (theArgCount == 1)
{
cout << "File name must be specified\n";
return 1;
}
ifstream aF( theArgs[1], ios::in );
if ( !aF.is_open() )
{
cout << "File not found\n";
return 1;
}
LineList aVect;
while (true)
{
char aData[500];
aF.getline(aData, sizeof aData);
ProcessLine(aVect, aData);
if ( aF.bad() || aF.eof() ) break;
}
aF.close();
if (BuildNumber == 0)
{
cout << "#define BUILDNUMBER string not found\n";
return 1;
}
ofstream aFO(theArgs[1], ios::out|ios::trunc);
if ( !aFO.is_open() )
{
cout << "Could not write data back to file\n";
return 1;
}
bool aNewLine = false;
for (LineIter aIt = aVect.begin(); aIt != aVect.end(); aIt++)
{
if (aNewLine)
aFO << endl;
aFO << *aIt;
aNewLine = true;
}
aFO.close();
cout << "Success\n";
return 0;
}
void Inkscape::LineSnapper::constrainedSnap(IntermSnapResults &isr,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &/*bbox_to_snap*/,
SnapConstraint const &c,
std::vector<SPItem const *> const */*it*/,
std::vector<SnapCandidatePoint> */*unselected_nodes*/) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.isSourceSnappable(p.getSourceType()) == false) {
return;
}
// project the mouse pointer onto the constraint. Only the projected point will be considered for snapping
Geom::Point pp = c.projection(p.getPoint());
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(pp);
for (LineList::const_iterator i = lines.begin(); i != lines.end(); ++i) {
Geom::Point const point_on_line = c.hasPoint() ? c.getPoint() : pp;
Geom::Line gridguide_line(i->second, i->second + Geom::rot90(i->first));
if (c.isCircular()) {
// Find the intersections between the line and the circular constraint
// First, project the origin of the circle onto the line
Geom::Point const origin = c.getPoint();
Geom::Point const p_proj = Geom::projection(origin, gridguide_line);
Geom::Coord dist = Geom::L2(p_proj - origin); // distance from circle origin to constraint line
Geom::Coord radius = c.getRadius();
if (dist == radius) {
// Only one point of intersection;
_addSnappedPoint(isr, p_proj, Geom::L2(pp - p_proj), p.getSourceType(), p.getSourceNum(), true);
} else if (dist < radius) {
// Two points of intersection, symmetrical with respect to the projected point
// Calculate half the length of the linesegment between the two points of intersection
Geom::Coord l = sqrt(radius*radius - dist*dist);
Geom::Coord d = Geom::L2(gridguide_line.versor()); // length of versor, needed to normalize the versor
if (d > 0) {
Geom::Point v = l*gridguide_line.versor()/d;
_addSnappedPoint(isr, p_proj + v, Geom::L2(p.getPoint() - (p_proj + v)), p.getSourceType(), p.getSourceNum(), true);
_addSnappedPoint(isr, p_proj - v, Geom::L2(p.getPoint() - (p_proj - v)), p.getSourceType(), p.getSourceNum(), true);
}
}
} else {
// Find the intersections between the line and the linear constraint
Geom::Line constraint_line(point_on_line, point_on_line + c.getDirection());
Geom::OptCrossing inters = Geom::OptCrossing(); // empty by default
try
{
inters = Geom::intersection(constraint_line, gridguide_line);
}
catch (Geom::InfiniteSolutions &e)
{
// We're probably dealing with parallel lines, so snapping doesn't make any sense here
continue; // jump to the next iterator in the for-loop
}
if (inters) {
Geom::Point t = constraint_line.pointAt((*inters).ta);
const Geom::Coord dist = Geom::L2(t - p.getPoint());
if (dist < getSnapperTolerance()) {
// When doing a constrained snap, we're already at an intersection.
// This snappoint is therefore fully constrained, so there's no need
// to look for additional intersections; just return the snapped point
// and forget about the line
_addSnappedPoint(isr, t, dist, p.getSourceType(), p.getSourceNum(), true);
}
}
}
}
}
void Inkscape::LineSnapper::freeSnap(IntermSnapResults &isr,
Inkscape::SnapCandidatePoint const &p,
Geom::OptRect const &/*bbox_to_snap*/,
std::vector<SPItem const *> const */*it*/,
std::vector<Inkscape::SnapCandidatePoint> */*unselected_nodes*/) const
{
if (!(_snap_enabled && _snapmanager->snapprefs.isSourceSnappable(p.getSourceType())) ) {
return;
}
/* Get the lines that we will try to snap to */
const LineList lines = _getSnapLines(p.getPoint());
for (LineList::const_iterator i = lines.begin(); i != lines.end(); ++i) {
Geom::Point const p1 = i->second; // point at guide/grid line
Geom::Point const p2 = p1 + Geom::rot90(i->first); // 2nd point at guide/grid line
// std::cout << " line through " << i->second << " with normal " << i->first;
assert(i->first != Geom::Point(0,0)); // we cannot project on an linesegment of zero length
Geom::Point const p_proj = Geom::projection(p.getPoint(), Geom::Line(p1, p2));
Geom::Coord const dist = Geom::L2(p_proj - p.getPoint());
//Store any line that's within snapping range
if (dist < getSnapperTolerance()) {
_addSnappedLine(isr, p_proj, dist, p.getSourceType(), p.getSourceNum(), i->first, i->second);
// For any line that's within range, we will also look at it's "point on line" p1. For guides
// this point coincides with its origin; for grids this is of no use, but we cannot
// discern between grids and guides here
Geom::Coord const dist_p1 = Geom::L2(p1 - p.getPoint());
if (dist_p1 < getSnapperTolerance()) {
_addSnappedLinesOrigin(isr, p1, dist_p1, p.getSourceType(), p.getSourceNum(), false);
// Only relevant for guides; grids don't have an origin per line
// Therefore _addSnappedLinesOrigin() will only be implemented for guides
}
// Here we will try to snap either tangentially or perpendicularly to a grid/guide line
// For this we need to know where the origin is located of the line that is currently being rotated,
std::vector<std::pair<Geom::Point, bool> > const origins_and_vectors = p.getOriginsAndVectors();
// Now we will iterate over all the origins and vectors and see which of these will get use a tangential or perpendicular snap
for (std::vector<std::pair<Geom::Point, bool> >::const_iterator it_origin_or_vector = origins_and_vectors.begin(); it_origin_or_vector != origins_and_vectors.end(); ++it_origin_or_vector) {
if ((*it_origin_or_vector).second) { // if "second" is true then "first" is a vector, otherwise it's a point
// When snapping a line with a constant vector (constant direction) to a guide or grid line,
// then either all points will be perpendicular/tangential or none at all. This is not very useful
continue;
}
//Geom::Point origin_doc = _snapmanager->getDesktop()->dt2doc((*it_origin_or_vector).first); // "first" contains a Geom::Point, denoting either a point
Geom::Point origin = (*it_origin_or_vector).first; // "first" contains a Geom::Point, denoting either a point
// We won't try to snap tangentially; a line being tangential to another line can be achieved by snapping both its endpoints
// individually to the other line. There's no need to have an explicit tangential snap here, that would be redundant
if (_snapmanager->snapprefs.getSnapPerp()) { // Find the point that leads to a perpendicular snap
Geom::Point const origin_proj = Geom::projection(origin, Geom::Line(p1, p2));
Geom::Coord dist = Geom::L2(origin_proj - p.getPoint());
if (dist < getSnapperTolerance()) {
_addSnappedLinePerpendicularly(isr, origin_proj, dist, p.getSourceType(), p.getSourceNum(), false);
}
}
}
// std::cout << " -> distance = " << dist;
}
// std::cout << std::endl;
}
}
