gds-render/trigonometric/cell-trigonometrics.c

120 lines
3.5 KiB
C

/*
* GDSII-Converter
* Copyright (C) 2018 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of GDSII-Converter.
*
* GDSII-Converter is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* GDSII-Converter is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file cell-trigonometrics.c
* @brief Calculation of gds_cell trigonometrics
* @author Mario Hüttel <mario.huettel@gmx.net>
*/
#include "cell-trigonometrics.h"
#include <math.h>
/**
* @addtogroup trigonometric
* @{
*/
static void convert_gds_point_to_2d_vector(struct gds_point *pt, struct vector_2d *vector)
{
vector->x = pt->x;
vector->y = pt->y;
}
/**
* @brief Update the given bounding box with the bounding box of a graphics element.
* @param box box to update
* @param gfx Graphics element
*/
static void update_box_with_gfx(union bounding_box *box, struct gds_graphics *gfx)
{
union bounding_box current_box;
bounding_box_prepare_empty(&current_box);
switch (gfx->gfx_type) {
case GRAPHIC_BOX:
/* Expected fallthrough */
case GRAPHIC_POLYGON:
bounding_box_calculate_polygon(gfx->vertices,
(conv_generic_to_vector_2d_t)&convert_gds_point_to_2d_vector,
&current_box);
break;
case GRAPHIC_PATH:
/*
* This is not implemented correctly.
* Please be aware if paths are the outmost elements of your cell.
* You might end up with a completely wrong calculated cell size.
*/
bounding_box_calculate_path_box(gfx->vertices, gfx->width_absolute,
(conv_generic_to_vector_2d_t)&convert_gds_point_to_2d_vector,
&current_box);
break;
default:
/* Unknown graphics object. */
/* Print error? Nah.. */
break;
}
/* Update box with results */
bounding_box_update_box(box, &current_box);
}
void calculate_cell_bounding_box(union bounding_box *box, struct gds_cell *cell)
{
GList *gfx_list;
struct gds_graphics *gfx;
GList *sub_cell_list;
struct gds_cell_instance *sub_cell;
union bounding_box temp_box;
if (!box || !cell)
return;
/* Update box with graphic elements */
for (gfx_list = cell->graphic_objs; gfx_list != NULL; gfx_list = gfx_list->next) {
gfx = (struct gds_graphics *)gfx_list->data;
update_box_with_gfx(box, gfx);
}
/* Update bounding box with boxes of subcells */
for (sub_cell_list = cell->child_cells; sub_cell_list != NULL;
sub_cell_list = sub_cell_list->next) {
sub_cell = (struct gds_cell_instance *)sub_cell_list->data;
bounding_box_prepare_empty(&temp_box);
/* Recursion Woohoo!! This dies if your GDS is faulty and contains a reference loop */
calculate_cell_bounding_box(&temp_box, sub_cell->cell_ref);
/* Apply transformations */
bounding_box_apply_transform(ABS(sub_cell->magnification), sub_cell->angle,
sub_cell->flipped, &temp_box);
/* Move bounding box to origin */
temp_box.vectors.lower_left.x += sub_cell->origin.x;
temp_box.vectors.upper_right.x += sub_cell->origin.x;
temp_box.vectors.lower_left.y += sub_cell->origin.y;
temp_box.vectors.upper_right.y += sub_cell->origin.y;
/* update the parent's box */
bounding_box_update_box(box, &temp_box);
}
}
/** @} */