/* --------------------------------------------
* gap_locateAreaWithinRadius
* --------------------------------------------
* processing starts at reference coords and continues
* outwards upto targetMoveRadius for 4 quadrants.
*
* returns average color difference (0.0 upto 1.0)
* where 0.0 indicates exact matching area
* and 1.0 indicates all pixel have maximum color diff (when comaring full white agains full black area)
*/
gdouble
gap_locateAreaWithinRadius(gint32 refDrawableId
, gint32 refX
, gint32 refY
, gint32 refShapeRadius
, gint32 targetDrawableId
, gint32 targetMoveRadius
, gint32 *targetX
, gint32 *targetY
)
{
gdouble avgColordiff;
avgColordiff =
gap_locateAreaWithinRadiusWithOffset(refDrawableId
, refX
, refY
, refShapeRadius
, targetDrawableId
, targetMoveRadius
, targetX
, targetY
, 0
, 0
);
return (avgColordiff);
} /* end gap_locateAreaWithinRadius */
/* ------------------------------------
* p_locate_target
* ------------------------------------
*/
static void
p_locate_target(gint32 refLayerId, PixelCoords *refCoords
, gint32 targetLayerId, PixelCoords *targetCoords
, gint32 locateOffsetX, gint32 locateOffsetY
, FilterValues *valPtr, gint32 *lostTraceCount)
{
gdouble colordiffLocate;
gint ref_offset_x;
gint ref_offset_y;
gint target_offset_x;
gint target_offset_y;
gint32 refX;
gint32 refY;
gint32 targetX;
gint32 targetY;
/* get offsets of the layers within the image */
gimp_drawable_offsets (refLayerId, &ref_offset_x, &ref_offset_y);
gimp_drawable_offsets (targetLayerId, &target_offset_x, &target_offset_y);
targetCoords->valid = FALSE;
refX = refCoords->px - ref_offset_x;
refY = refCoords->py - ref_offset_y;
colordiffLocate =
gap_locateAreaWithinRadiusWithOffset (refLayerId
, refX
, refY
, valPtr->refShapeRadius
, targetLayerId
, valPtr->targetMoveRadius
, &targetX
, &targetY
, locateOffsetX
, locateOffsetY
);
targetCoords->px = targetX + target_offset_x;
targetCoords->py = targetY + target_offset_y;
if (colordiffLocate < valPtr->loacteColodiffThreshold)
{
/* successful located the deatail in target layer
* set target coordinates valid.
*/
targetCoords->valid = TRUE;
}
else
{
(*lostTraceCount) += 1;
}
if(gap_debug)
{
printf("p_locate_target: refX:%d refY:%d locateOffsetX:%d locateOffsetY:%d\n"
" targetX:%d targetY:%d targetCoords->px:%d py:%d avgColodiff:%.5f valid:%d\n"
,(int)refX
,(int)refY
,(int)locateOffsetX
,(int)locateOffsetY
,(int)targetX
,(int)targetY
,(int)targetCoords->px
,(int)targetCoords->py
,(float)colordiffLocate
, targetCoords->valid
);
}
} /* end p_locate_target */
