Cross Reference: /inkscape/src/display/canvas-axonomgrid.cpp

Lines Matching defs:grid
24 # include <gtkmm/grid.h>
37 #include "display/canvas-grid.h"
236             // Legacy grid not in 'user units'
249             // Legacy grid not in 'user units'
262             // Legacy grid not in 'user units'
321         gridunit = unit_table.getUnit(value); // Display unit identifier in grid menu
359             _("_Origin X:"), _("X coordinate of grid origin"), "originx",
362             _("O_rigin Y:"), _("Y coordinate of grid origin"), "originy",
374             _("Minor grid line _color:"), _("Minor grid line color"), _("Color of the minor grid lines"),
379             _("Ma_jor grid line color:"), _("Major grid line color"),
380             _("Color of the major (highlighted) grid lines"),
384             _("_Major grid line every:"), "", _("lines"), "empspacing", _wr, repr, doc ) );
538     // gc = gridcoordinates (the coordinates calculated from the grids origin 'grid->ow'.
651 CanvasAxonomGridSnapper::CanvasAxonomGridSnapper(CanvasAxonomGrid *grid, SnapManager *sm, Geom::Coord const d) : LineSnapper(sm, d)
653     this->grid = grid;
676     if ( grid == NULL ) {
684         // Only snapping to visible grid lines
685         spacing_h = grid->spacing_ylines; // this is the spacing of the visible grid lines measured in screen pixels
686         spacing_v = grid->lyw; // vertical
695         // Snapping to any grid line, whether it's visible or not
696         spacing_h = grid->lengthy  /(grid->tan_angle[X] + grid->tan_angle[Z]);
697         spacing_v = grid->lengthy;
701     // In an axonometric grid, any point will be surrounded by 6 grid lines:
702     // - 2 vertical grid lines, one left and one right from the point
703     // - 2 angled z grid lines, one above and one below the point
704     // - 2 angled x grid lines, one above and one below the point
706     // Calculate the x coordinate of the vertical grid lines
707     Geom::Coord x_max = Inkscape::Util::round_to_upper_multiple_plus(p[Geom::X], spacing_h, grid->origin[Geom::X]);
708     Geom::Coord x_min = Inkscape::Util::round_to_lower_multiple_plus(p[Geom::X], spacing_h, grid->origin[Geom::X]);
710     // Calculate the y coordinate of the intersection of the angled grid lines with the y-axis
711     double y_proj_along_z = p[Geom::Y] - grid->tan_angle[Z]*(p[Geom::X] - grid->origin[Geom::X]);
712     double y_proj_along_x = p[Geom::Y] + grid->tan_angle[X]*(p[Geom::X] - grid->origin[Geom::X]);
713     double y_proj_along_z_max = Inkscape::Util::round_to_upper_multiple_plus(y_proj_along_z, spacing_v, grid->origin[Geom::Y]);
714     double y_proj_along_z_min = Inkscape::Util::round_to_lower_multiple_plus(y_proj_along_z, spacing_v, grid->origin[Geom::Y]);
715     double y_proj_along_x_max = Inkscape::Util::round_to_upper_multiple_plus(y_proj_along_x, spacing_v, grid->origin[Geom::Y]);
716     double y_proj_along_x_min = Inkscape::Util::round_to_lower_multiple_plus(y_proj_along_x, spacing_v, grid->origin[Geom::Y]);
718     // Calculate the versor for the angled grid lines
719     Geom::Point vers_x = Geom::Point(1, -grid->tan_angle[X]);
720     Geom::Point vers_z = Geom::Point(1, grid->tan_angle[Z]);
722     // Calculate the normal for the angled grid lines
726     // The four angled grid lines form a parallelogram, enclosing the point
727     // One of the two vertical grid lines divides this parallelogram in two triangles
729     // only the three grid lines defining that triangle
731     // The vertical grid line is at the intersection of two angled grid lines.
755         use_left_half = (p[Geom::X] - grid->origin[Geom::X]) < inters_pt[Geom::X];
759     // Return the three grid lines which define the triangle that encloses our point
760     // If we didn't find an intersection above, all 6 grid lines will be returned
762         s.push_back(std::make_pair(norm_z, Geom::Point(grid->origin[Geom::X], y_proj_along_z_max)));
763         s.push_back(std::make_pair(norm_x, Geom::Point(grid->origin[Geom::X], y_proj_along_x_min)));
768         s.push_back(std::make_pair(norm_z, Geom::Point(grid->origin[Geom::X], y_proj_along_z_min)));
769         s.push_back(std::make_pair(norm_x, Geom::Point(grid->origin[Geom::X], y_proj_along_x_max)));