/*! \brief Calculate the bounds of the path
*
* On failure, this function sets the bounds to empty.
*
* \param [in] toplevel Unused
* \param [in] object The path to calculate bounds of.
* \param [out] bounds The bounds of the path
*/
void
geda_path_object_calculate_bounds (TOPLEVEL *toplevel,
const OBJECT *object,
GedaBounds *bounds)
{
gint expand;
gint i;
geda_bounds_init (bounds);
g_return_if_fail (object != NULL);
g_return_if_fail (object->type == OBJ_PATH);
g_return_if_fail (object->path != NULL);
/* Find the bounds of the path region */
for (i = 0; i < object->path->num_sections; i++) {
PATH_SECTION *section = &object->path->sections[i];
switch (section->code) {
case PATH_CURVETO:
/* Bezier curves with this construction of control points will lie
* within the convex hull of the control and curve end points */
bounds->min_x = MIN (bounds->min_x, section->x1);
bounds->min_y = MIN (bounds->min_y, section->y1);
bounds->max_x = MAX (bounds->max_x, section->x1);
bounds->max_y = MAX (bounds->max_y, section->y1);
bounds->min_x = MIN (bounds->min_x, section->x2);
bounds->min_y = MIN (bounds->min_y, section->y2);
bounds->max_x = MAX (bounds->max_x, section->x2);
bounds->max_y = MAX (bounds->max_y, section->y2);
/* Fall through */
case PATH_MOVETO:
case PATH_MOVETO_OPEN:
case PATH_LINETO:
bounds->min_x = MIN (bounds->min_x, section->x3);
bounds->min_y = MIN (bounds->min_y, section->y3);
bounds->max_x = MAX (bounds->max_x, section->x3);
bounds->max_y = MAX (bounds->max_y, section->y3);
break;
case PATH_END:
break;
}
}
expand = ceil (0.5 * G_SQRT2 * object->line_width);
/* This isn't strictly correct, but a 1st order approximation */
geda_bounds_expand (bounds, bounds, expand, expand);
}
/*! \brief Get BOX bounding rectangle in WORLD coordinates.
* \par Function Description
* This function sets the <B>left</B>, <B>top</B>, <B>right</B> and <B>bottom</B>
* parameters to the boundings of the box object described in <B>*box</B>
* in world units.
*
* \param [in] toplevel The TOPLEVEL object.
* \param [in] object BOX OBJECT to read coordinates from.
* \param [out] left Left box coordinate in WORLD units.
* \param [out] top Top box coordinate in WORLD units.
* \param [out] right Right box coordinate in WORLD units.
* \param [out] bottom Bottom box coordinate in WORLD units.
*/
void
geda_box_object_calculate_bounds (TOPLEVEL *toplevel,
const OBJECT *object,
GedaBounds *bounds)
{
gint expand;
geda_bounds_init (bounds);
g_return_if_fail (object != NULL);
g_return_if_fail (object->type == OBJ_BOX);
g_return_if_fail (object->box != NULL);
geda_box_calculate_bounds (object->box, bounds);
expand = (object->line_width + 1) / 2;
/* This isn't strictly correct, but a 1st order approximation */
geda_bounds_expand (bounds, bounds, expand, expand);
}
/*! \brief Calculate the bounds of the net
*
* On failure, this function sets the bounds to empty.
*
* \param [in] toplevel Unused
* \param [in] object The net object
* \param [out] bounds The bounds of the net
*/
void
geda_net_object_calculate_bounds (TOPLEVEL *toplevel,
const OBJECT *object,
GedaBounds *bounds)
{
gint expand;
geda_bounds_init (bounds);
g_return_if_fail (object != NULL);
g_return_if_fail (object->type == OBJ_NET);
g_return_if_fail (object->line != NULL);
geda_line_calculate_bounds (object->line, bounds);
expand = ceil (0.5 * G_SQRT2 * NET_WIDTH);
/* This isn't strictly correct, but a 1st order approximation */
geda_bounds_expand (bounds, bounds, expand, expand);
}
