/*
* Determines whether the point is inside a contour, outside, or lies on an edge (or coinsides with a vertex).
* @overload point_polygon_test(point, measure_dist)
* @param point [CvPoint2D32f] Point tested against the contour
* @param measure_dist [Boolean] If true, the method estimates the signed distance from the point to
* the nearest contour edge. Otherwise, the function only checks if the point is inside a contour or not.
* @return [Number] When measure_dist = false, the return value is +1, -1 and 0, respectively.
* When measure_dist = true, it is a signed distance between the point and the nearest contour edge.
* @opencv_func cvPointPolygonTest
*/
VALUE
rb_point_polygon_test(VALUE self, VALUE point, VALUE measure_dist)
{
int measure_dist_flag;
if (measure_dist == Qtrue)
measure_dist_flag = 1;
else if (measure_dist == Qfalse)
measure_dist_flag = 0;
else
measure_dist_flag = NUM2INT(measure_dist);
double dist = Qnil;
try {
dist = cvPointPolygonTest(CVARR(self), VALUE_TO_CVPOINT2D32F(point), measure_dist_flag);
}
catch (cv::Exception& e) {
raise_cverror(e);
}
/* cvPointPolygonTest returns 100, -100 or 0 when measure_dist = 0 */
if ((!measure_dist_flag) && ((int)dist) != 0)
dist = (dist > 0) ? 1 : -1;
return rb_float_new(dist);
}
/*
* Create a CvSURFPoint
*
* @overload new(pt, laplacian, size, dir, hessian)
* @param pt [CvPoint2D32f] Position of the feature within the image
* @param laplacian [Integer] -1, 0 or +1. sign of the laplacian at the point.
* Can be used to speedup feature comparison
* (normally features with laplacians of different signs can not match)
* @param size [Integer] Size of the feature
* @param dir [Number] Orientation of the feature: 0..360 degrees
* @param hessian [Number] Value of the hessian (can be used to
* approximately estimate the feature strengths)
* @return [CvSURFPoint] self
*/
VALUE
rb_initialize(VALUE self, VALUE pt, VALUE laplacian, VALUE size, VALUE dir, VALUE hessian)
{
CvSURFPoint *self_ptr = CVSURFPOINT(self);
self_ptr->pt = VALUE_TO_CVPOINT2D32F(pt);
self_ptr->laplacian = NUM2INT(laplacian);
self_ptr->size = NUM2INT(size);
self_ptr->dir = (float)NUM2DBL(dir);
self_ptr->hessian = (float)NUM2DBL(hessian);
return self;
}
/*
* Calculates distance between a point and the nearest contour edgex
* @overload measure_distance(point)
* @param point [CvPoint2D32f] Point tested against the contour
* @return Signed distance between the point and the nearest contour edge
* @opencv_func cvPointPolygonTest
*/
VALUE
rb_measure_distance(VALUE self, VALUE point)
{
double distance = 0;
try {
distance = cvPointPolygonTest(CVARR(self), VALUE_TO_CVPOINT2D32F(point), 1);
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return rb_float_new(distance);
}
/*
* Performs a point-in-contour test.
* The method determines whether the point is inside a contour, outside,
* or lies on an edge (or coincides with a vertex).
* @overload in?(point)
* @param point [CvPoint2D32f] Point tested against the contour
* @return [Boolean] If the point is inside, returns true. If outside, returns false.
* If lies on an edge, returns nil.
* @opencv_func cvPointPolygonTest
*/
VALUE
rb_in_q(VALUE self, VALUE point)
{
double n = 0;
try {
n = cvPointPolygonTest(CVARR(self), VALUE_TO_CVPOINT2D32F(point), 0);
}
catch (cv::Exception& e) {
raise_cverror(e);
}
return n == 0 ? Qnil : n > 0 ? Qtrue : Qfalse;
}
/*
* call-seq:
* CvBox2D.new(<i>[center][, size][, angle]</i>) -> cvbox2d
*
* Create a box
*/
VALUE
rb_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE center, size, angle;
rb_scan_args(argc, argv, "03", ¢er, &size, &angle);
if (!NIL_P(center))
CVBOX2D(self)->center = VALUE_TO_CVPOINT2D32F(center);
if (!NIL_P(size))
CVBOX2D(self)->size = VALUE_TO_CVSIZE2D32F(size);
if (!NIL_P(size))
CVBOX2D(self)->angle = NUM2DBL(angle);
return self;
}
/*
* call-seq:
* center = <i>value</i>
*
* Set center to <i>value</i>
*/
VALUE
rb_set_center(VALUE self, VALUE value)
{
CVBOX2D(self)->center = VALUE_TO_CVPOINT2D32F(value);
return self;
}
/*
* Set position of the feature.
*
* @overload pt=(value)
* @param value [CvPoint2D32f] Valuet to set.
*/
VALUE
rb_set_pt(VALUE self, VALUE value)
{
CVSURFPOINT(self)->pt = VALUE_TO_CVPOINT2D32F(value);
return self;
}
