#include "guidelineline.h"
// TnzCore includes
#include "tgl.h"
//*****************************************************************************************
// TGuidelineLineBase implementation
//*****************************************************************************************
TGuidelineLineBase::TGuidelineLineBase(bool enabled, double magnetism, const TPointD &p0, const TPointD &p1):
TGuideline(enabled, magnetism), p0(p0), p1(p1) { }
TPointD
TGuidelineLineBase::calcDirection(const TPointD &p0, const TPointD &p1) {
TPointD d = p1 - p0;
double k = norm2(d);
return k > TConsts::epsilon*TConsts::epsilon ? d*(1.0/sqrt(k)) : TPointD();
}
static bool
truncateX(double &x0, double &y0, double &x1, double &y1, double minx, double maxx) {
double dx = x1 - x0;
if (fabs(dx) < TConsts::epsilon) return false;
double k = (y1 - y0)/dx;
if (dx > 0.0) {
y0 += k*(minx - x0); x0 = minx;
y1 += k*(maxx - x1); x1 = maxx;
} else {
y0 += k*(maxx - x0); x0 = maxx;
y1 += k*(minx - x1); x1 = minx;
}
return true;
}
bool
TGuidelineLineBase::truncateInfiniteLine(const TRectD &bounds, TPointD &p0, TPointD &p1) {
if (bounds.isEmpty()) return false;
TPointD d = p0 - p1;
TDimensionD size = bounds.getSize();
if (fabs(d.x)*bounds.y0 > bounds.x0*fabs(d.y)) {
// horizontal
if (!truncateX(p0.x, p0.y, p1.x, p1.y, bounds.x0, bounds.x1)) return false;
if (p0.y <= bounds.y0 && p1.y <= bounds.y0) return false;
if (p0.y >= bounds.y1 && p1.y >= bounds.y1) return false;
} else {
// vertical
if (!truncateX(p0.y, p0.x, p1.y, p1.x, bounds.y0, bounds.y1)) return false;
if (p0.x <= bounds.x0 && p1.x <= bounds.x0) return false;
if (p0.x >= bounds.x1 && p1.x >= bounds.x1) return false;
}
return true;
}
bool
TGuidelineLineBase::truncateInfiniteRay(const TRectD &bounds, TPointD &p0, TPointD &p1) {
if (bounds.isEmpty()) return false;
TRectD b(bounds);
if (b.contains(p0)) {
(p0.x < p1.x ? b.x0 : b.x1) = p0.x;
(p0.y < p1.y ? b.y0 : b.y1) = p0.y;
}
return truncateInfiniteLine(b, p0, p1);
}
void
TGuidelineLineBase::drawInfiniteLine(const TPointD &p0, const TPointD &p1, bool ray, bool active, bool enabled) const {
TAffine4 modelview, projection;
glGetDoublev(GL_MODELVIEW_MATRIX, modelview.a);
glGetDoublev(GL_PROJECTION_MATRIX, projection.a);
TAffine matrix = (projection*modelview).get2d();
TPointD pp0 = matrix*p0;
TPointD pp1 = matrix*p1;
if ( ray
? !truncateInfiniteRay (TRectD(-1.0, -1.0, 1.0, 1.0), pp0, pp1)
: !truncateInfiniteLine(TRectD(-1.0, -1.0, 1.0, 1.0), pp0, pp1) ) return;
double pixelSize = sqrt(tglGetPixelSize2());
TAffine matrixInv = matrix.inv();
drawSegment(matrixInv*pp0, matrixInv*pp1, pixelSize, active, enabled);
}
//*****************************************************************************************
// TGuidelineLine implementation
//*****************************************************************************************
TGuidelineLine::TGuidelineLine(bool enabled, double magnetism, const TPointD &p0, const TPointD &p1):
TGuidelineLineBase(enabled, magnetism, p0, p1),
dir(calcDirection(p0, p1)),
dist(norm(p1 - p0)) { }
TTrackPoint
TGuidelineLine::transformPoint(const TTrackPoint &point) const {
TTrackPoint p(point);
p.position = p0 + dir * std::max(0.0, std::min(dist, ((p.position - p0)*dir)));
return p;
}
void
TGuidelineLine::draw(bool active, bool enabled) const
{ drawSegment(p0, p1, sqrt(tglGetPixelSize2()), active, enabled); }
//*****************************************************************************************
// TGuidelineInfiniteLine implementation
//*****************************************************************************************
TGuidelineInfiniteLine::TGuidelineInfiniteLine(bool enabled, double magnetism, const TPointD &p0, const TPointD &p1):
TGuidelineLineBase(enabled, magnetism, p0, p1),
dir(calcDirection(p0, p1)) { }
TTrackPoint
TGuidelineInfiniteLine::transformPoint(const TTrackPoint &point) const {
TTrackPoint p(point);
p.position = p0 + dir * ((p.position - p0)*dir);
return p;
}
void
TGuidelineInfiniteLine::draw(bool active, bool enabled) const
{ drawInfiniteLine(p0, p1, false, active, enabled); }
//*****************************************************************************************
// TGuidelineRay implementation
//*****************************************************************************************
TGuidelineRay::TGuidelineRay(bool enabled, double magnetism, const TPointD &p0, const TPointD &p1):
TGuidelineLineBase(enabled, magnetism, p0, p1),
dir(calcDirection(p0, p1)) { }
TTrackPoint
TGuidelineRay::transformPoint(const TTrackPoint &point) const {
TTrackPoint p(point);
p.position = p0 + dir * std::max(0.0, ((p.position - p0)*dir));
return p;
}
void
TGuidelineRay::draw(bool active, bool enabled) const
{ drawInfiniteLine(p0, p1, true, active, enabled); }