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%% options
copyright owner = Dirk Krause
copyright year = 2012-xxxx
license = bsd
%% header
#ifdef __cplusplus
extern "C" {
#endif
/** Reset a bounding box.
@param bb Bounding box to reset.
*/
void
dk3bb_reset(dk3_bb_t *bb);
/** Add x value to bounding box.
@param bb Bounding box to modify.
@param x Value to add.
*/
void
dk3bb_add_x(dk3_bb_t *bb, double x);
/** Add y value to bounding box.
@param bb Bounding box to modify.
@param y Value to add.
*/
void
dk3bb_add_y(dk3_bb_t *bb, double y);
/** Add x value with radius.
@param bb Bounding box to modify.
@param x X value to add.
@param r Radius.
@return 1 on success, 0 on error.
*/
int
dk3bb_add_x_width(dk3_bb_t *bb, double x, double r);
/** Add y value with radius.
@param bb Bounding box to modify.
@param y Y value to add.
@param r Radius.
@return 1 on success, 0 on error.
*/
int
dk3bb_add_y_width(dk3_bb_t *bb, double y, double r);
/** Add point.
@param bb Bouding box to grow.
@param x X value of point.
@param y Y value of point.
*/
void
dk3bb_point(dk3_bb_t *bb, double x, double y);
/** Add point with radius.
@param bb
@param x
@param y
@param r
@return 1 on success, 0 on error (math overflow).
*/
int
dk3bb_point_width(dk3_bb_t *bb, double x, double y, double r);
/** Merge two bounding boxes.
@param dbb Destination bounding box.
@param sbb Source bounding box to merge into dbb.
*/
void
dk3bb_merge(dk3_bb_t *dbb, dk3_bb_t const *sbb);
#ifdef __cplusplus
}
#endif
%% module
#include "dk3all.h"
#include "dk3bb.h"
$!trace-include
void
dk3bb_reset(dk3_bb_t *bb)
{
$? "+ dk3bb_reset"
if(bb) {
bb->xmin = bb->xmax = bb->ymin = bb->ymax = 0.0;
bb->xused = bb->yused = 0;
} $? "- dk3bb_reset"
}
void
dk3bb_add_x(dk3_bb_t *bb, double x)
{
$? "+ dk3bb_add_x x=%lg", x
if(bb) {
if(bb->xused) {
if(x < bb->xmin) { bb->xmin = x; }
if(x > bb->xmax) { bb->xmax = x; }
} else {
bb->xmin = x; bb->xmax = x; bb->xused = 1;
} $? ". NOW xmin=%lg xmax=%lg", bb->xmin, bb->xmax
} $? "- dk3bb_add_x"
}
void
dk3bb_add_y(dk3_bb_t *bb, double y)
{
$? "+ dk3bb_add_y y=%lg", y
if(bb) {
if(bb->yused) {
if(y < bb->ymin) { bb->ymin = y; }
if(y > bb->ymax) { bb->ymax = y; }
} else {
bb->ymin = y; bb->ymax = y; bb->yused = 1;
} $? ". NOW ymin=%lg ymax=%lg", bb->ymin, bb->ymax
} $? "- dk3bb_add_y"
}
int
dk3bb_add_x_width(dk3_bb_t *bb, double x, double r)
{
double x1; /* Minimum x value. */
double x2; /* Maximum x value. */
int ec = 0; /* Error code for mathematical operations. */
int back = 0;
$? "+ dk3bb_add_x_width x=%lg r=%lg", x, r
if(bb) {
x1 = dk3ma_d_sub_ok(x, r, &ec);
x2 = dk3ma_d_add_ok(x, r, &ec);
if(0 == ec) {
back = 1;
dk3bb_add_x(bb, x1);
dk3bb_add_x(bb, x2);
}
} $? "- dk3bb_add_x_width %d", back
return back;
}
int
dk3bb_add_y_width(dk3_bb_t *bb, double y, double r)
{
double y1; /* Minimum y value. */
double y2; /* Maximum y value. */
int ec = 0; /* Error code for mathematical operations. */
int back = 0;
$? "+ dk3bb_add_y_width y=%lg r=%lg", y, r
y1 = dk3ma_d_sub_ok(y, r, &ec);
y2 = dk3ma_d_add_ok(y, r, &ec);
if(0 == ec) {
back = 1;
dk3bb_add_y(bb, y1);
dk3bb_add_y(bb, y2);
} $? "- dk3bb_add_y_width %d", back
return back;
}
void
dk3bb_point(dk3_bb_t *bb, double x, double y)
{
$? "+ dk3bb_point x=%lg y=%lg", x ,y
if(bb) {
dk3bb_add_x(bb, x);
dk3bb_add_y(bb, y);
} $? "- dk3bb_point"
}
int
dk3bb_point_width(dk3_bb_t *bb, double x, double y, double r)
{
int back = 0;
$? "+ dk3bb_point_width x=%lg y=%lg r=%lg", x, y, r
if(bb) {
if(dk3bb_add_x_width(bb, x, r)) {
if(dk3bb_add_y_width(bb, y, r)) {
back = 1;
}
}
} $? "- dk3bb_point_width %d", back
return back;
}
void
dk3bb_merge(dk3_bb_t *dbb, dk3_bb_t const *sbb)
{
$? "+ dk3bb_merge"
if((dbb) && (sbb)) {
if(sbb->xused) {
dk3bb_add_x(dbb, sbb->xmin);
dk3bb_add_x(dbb, sbb->xmax);
}
if(sbb->yused) {
dk3bb_add_y(dbb, sbb->ymin);
dk3bb_add_y(dbb, sbb->ymax);
}
}
$? "- dk3bb_merge"
}
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