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https://github.com/qelectrotech/qelectrotech-source-mirror.git
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DXF Arc & Ellipse: Improved approximate formation.
The ellipse is divided into 4 parts (as per 4 quadrants). These 4 arcs are drawn separately by approximating them as arcs of circles. git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2760 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
abhishekm71
@@ -441,9 +441,9 @@ void ExportDialog::generateDxf(Diagram *diagram, int width, int height, bool kee
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y -= fontSize*1.06;
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else if (int(angle - 180) % 360 == 0) // 180 degrees rotation
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y += fontSize*1.06;
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else if (int(angle - 270) % 360 == 0) // 90 degrees rotation
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else if (int(angle - 270) % 360 == 0) // 270 degrees rotation
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x -= fontSize*1.06;
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else // ((angle - 90) % 360 == 0) 270 degrees rotation
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else // ((angle - 90) % 360 == 0) 90 degrees rotation
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x += fontSize*1.06;
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}
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@@ -579,9 +579,9 @@ void ExportDialog::generateDxf(Diagram *diagram, int width, int height, bool kee
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y -= fontSize*1.06;
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else if (int(angle - 180) % 360 == 0) // 180 degrees rotation
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y += fontSize*1.06;
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else if (int(angle - 270) % 360 == 0) // 90 degrees rotation
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else if (int(angle - 270) % 360 == 0) // 270 degrees rotation
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x -= fontSize*1.06;
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else // ((angle - 90) % 360 == 0) 270 degrees rotation
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else // ((angle - 90) % 360 == 0) 90 degrees rotation
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x += fontSize*1.06;
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}
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@@ -608,9 +608,9 @@ void ExportDialog::generateDxf(Diagram *diagram, int width, int height, bool kee
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y -= fontSize*1.06;
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else if (int(angle - 180) % 360 == 0) // 180 degrees rotation
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y += fontSize*1.06;
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else if (int(angle - 270) % 360 == 0) // 90 degrees rotation
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else if (int(angle - 270) % 360 == 0) // 270 degrees rotation
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x -= fontSize*1.06;
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else // ((angle - 90) % 360 == 0) 270 degrees rotation
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else // ((angle - 90) % 360 == 0) 90 degrees rotation
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x += fontSize*1.06;
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}
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}
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@@ -621,27 +621,125 @@ void ExportDialog::generateDxf(Diagram *diagram, int width, int height, bool kee
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void ExportDialog::drawDxfArcEllipse(QString file_path, qreal x, qreal y, qreal w, qreal h, qreal startAngle,
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qreal spanAngle, qreal hotspot_x, qreal hotspot_y, qreal rotation_angle) {
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/*//if horizontal ellipse
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if (w > h) {
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qreal sin1 = sin(startAngle);
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qreal sin2 = sin(startAngle + spanAngle);
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if (sin1 > 0 && sin2 < 0) {
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// vector of parts of arc (stored as a pair of startAngle and spanAngle) for each quadrant.
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QVector< QPair<qreal,qreal> > arc_parts_vector;
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if (spanAngle > 0) {
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qreal start = startAngle;
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qreal span;
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int i;
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for ( i = startAngle; i < startAngle+spanAngle; i++ ) {
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int absolute_theta = (i > 0) ? i : -i;
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if (absolute_theta == 0 || absolute_theta == 90 ||
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absolute_theta == 180 || absolute_theta == 270 ||
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absolute_theta == 360) {
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span = i - start;
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QPair<qreal, qreal> newPart(start,span);
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arc_parts_vector.push_back(newPart);
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start = i;
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}
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}
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}*/
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qreal center_x = x + w/2;
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qreal center_y = y - w/2;
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qreal radius = (w+h)/4;
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qreal endAngle = startAngle + spanAngle;
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QPointF transformed_point = rotation_transformed(center_x, center_y, hotspot_x, hotspot_y, rotation_angle);
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center_x = transformed_point.x();
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center_y = transformed_point.y();
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if (startAngle == 0 && spanAngle == 360)
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Createdxf::drawCircle(file_path, radius, center_x, center_y, 0);
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else {
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endAngle += rotation_angle;
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startAngle += rotation_angle;
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Createdxf::drawArc(file_path, center_x, center_y, radius, endAngle, startAngle, 0);
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if (start != i) {
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span = i - start;
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QPair<qreal, qreal> newPart(start,span);
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arc_parts_vector.push_back(newPart);
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}
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} else {
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qreal start = startAngle;
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qreal span;
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int i;
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for ( i = startAngle; i > startAngle+spanAngle; i-- ) {
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int absolute_theta = (i > 0) ? i : -i;
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if (absolute_theta == 0 || absolute_theta == 90 ||
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absolute_theta == 180 || absolute_theta == 270 ||
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absolute_theta == 360) {
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span = i - start;
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QPair<qreal, qreal> newPart(start,span);
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arc_parts_vector.push_back(newPart);
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start = i;
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}
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}
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if (start != i) {
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span = i - start;
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QPair<qreal, qreal> newPart(start,span);
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arc_parts_vector.push_back(newPart);
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}
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}
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for (int i = 0; i < arc_parts_vector.size(); i++) {
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QPair<qreal,qreal> arc = arc_parts_vector[i];
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if (arc.second == 0)
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continue;
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qreal arc_startAngle = arc.first * 3.142/180;
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qreal arc_spanAngle = arc.second * 3.142/180;
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qreal a = w/2;
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qreal b = h/2;
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qreal x1 = x + w/2 + a*cos(arc_startAngle);
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qreal y1 = y - h/2 + b*sin(arc_startAngle);
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qreal x2 = x + w/2 + a*cos(arc_startAngle + arc_spanAngle);
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qreal y2 = y - h/2 + b*sin(arc_startAngle + arc_spanAngle);
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qreal mid_ellipse_x = x + w/2 + a*cos(arc_startAngle + arc_spanAngle/2);
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qreal mid_ellipse_y = y - h/2 + b*sin(arc_startAngle + arc_spanAngle/2);
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qreal mid_line_x = (x1+x2)/2;
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qreal mid_line_y = (y1+y2)/2;
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qreal x3 = (mid_ellipse_x + mid_line_x)/2;
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qreal y3 = (mid_ellipse_y + mid_line_y)/2;
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// find circumcenter of points (x1,y1), (x3,y3) and (x2,y2)
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qreal a1 = 2*x2 - 2*x1;
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qreal b1 = 2*y2 - 2*y1;
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qreal c1 = x1*x1 + y1*y1 - x2*x2 - y2*y2;
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qreal a2 = 2*x3 - 2*x1;
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qreal b2 = 2*y3 - 2*y1;
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qreal c2 = x1*x1 + y1*y1 - x3*x3 - y3*y3;
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qreal center_x = (b1*c2 - b2*c1) / (a1*b2 - a2*b1);
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qreal center_y = (a1*c2 - a2*c1) / (b1*a2 - b2*a1);
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qreal radius = sqrt( (x1-center_x)*(x1-center_x) + (y1-center_y)*(y1-center_y) );
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if ( x1 > center_x && y1 > center_y )
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arc_startAngle = asin( (y1 - center_y) / radius );
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else if ( x1 > center_x && y1 < center_y )
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arc_startAngle = 3.142*2 - asin( (center_y - y1) / radius );
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else if ( x1 < center_x && y1 < center_y )
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arc_startAngle = 3.142 + asin( (center_y - y1) / radius );
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else
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arc_startAngle = 3.142 - asin( (y1 - center_y) / radius );
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qreal arc_endAngle;
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if ( x2 > center_x && y2 > center_y )
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arc_endAngle = asin( (y2 - center_y) / radius );
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else if ( x2 > center_x && y2 < center_y )
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arc_endAngle = 3.142*2 - asin( (center_y - y2) / radius );
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else if ( x2 < center_x && y2 < center_y )
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arc_endAngle = 3.142 + asin( (center_y - y2) / radius );
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else
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arc_endAngle = 3.142 - asin( (y2 - center_y) / radius );
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if (arc_endAngle < arc_startAngle) {
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qreal temp = arc_startAngle;
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arc_startAngle = arc_endAngle;
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arc_endAngle = temp;
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}
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QPointF transformed_point = rotation_transformed(center_x, center_y, hotspot_x, hotspot_y, rotation_angle);
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center_x = transformed_point.x();
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center_y = transformed_point.y();
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arc_endAngle *= 180/3.142;
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arc_startAngle *= 180/3.142;
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arc_endAngle -= rotation_angle;
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arc_startAngle -= rotation_angle;
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Createdxf::drawArc(file_path, center_x, center_y, radius, arc_startAngle, arc_endAngle, 0);
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}
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}
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