gobjMyCircleDraw Class Reference

Draw a circle or ellipse in xy plane. More...

#include <graphmisc.h>

Inheritance diagram for gobjMyCircleDraw:

Collaboration diagram for gobjMyCircleDraw:

List of all members.

Public Member Functions
void	radiusset (doublec radius)
template<typename T >
	gobjMyCircleDraw (point3< T > const &center_, gobjMyCircle const &cir_)
	Pass in a center point and a sampled circle.
template<typename T >
	gobjMyCircleDraw (point2< T > const &center_, gobjMyCircle const &cir_)
	Pass in a center point and a sampled circle.
template<typename T >
	gobjMyCircleDraw (doublec radius, point3< T > const &center_, gobjMyCircle const &cir_)
	Pass in a center point and a sampled circle.
template<typename T >
	gobjMyCircleDraw (doublec radius, point3< T > const &center_, point3< T > const &axis_, gobjMyCircle const &cir_)
	Pass in a center point, an axis which the circle is draw about and a sampled circle.
void	draw ()
	Draw a 2D circle in 3D space.
Public Attributes
double	scalex
	Multiplier of the x component of the circle cir.
double	scaley
	Multiplier of the y component of the circle cir.
point3< double >	center
	Translate to center before drawing.
point3< double >	axis
	The circles normal, by default is the z-axis.
gobjMyCircle const &	cir
	Many drawings can share a common circle as a reference.

---

Detailed Description

Draw a circle or ellipse in xy plane.

Definition at line 693 of file graphmisc.h.

---

Constructor & Destructor Documentation

template<typename T >

gobjMyCircleDraw::gobjMyCircleDraw	(	point3< T > const &	center_,
		gobjMyCircle const &	cir_
	)			[inline]

Pass in a center point and a sampled circle.

Definition at line 718 of file graphmisc.h.

    : scalex(1.0), scaley(1.0), center(center_.x,center_.y,center_.z), 
      axis(zaxis), cir(cir_) {}

template<typename T >

gobjMyCircleDraw::gobjMyCircleDraw	(	point2< T > const &	center_,
		gobjMyCircle const &	cir_
	)			[inline]

Pass in a center point and a sampled circle.

Definition at line 728 of file graphmisc.h.

    : scalex(1.0), scaley(1.0), center(center_.x,center_.y,0.0), 
      axis(zaxis), cir(cir_) {}

template<typename T >

gobjMyCircleDraw::gobjMyCircleDraw	(	doublec	radius,
		point3< T > const &	center_,
		gobjMyCircle const &	cir_
	)			[inline]

Pass in a center point and a sampled circle.

Definition at line 739 of file graphmisc.h.

    : scalex(radius), scaley(radius), center(center_.x,center_.y,center_.z), 
      axis(zaxis), cir(cir_) {}

template<typename T >

gobjMyCircleDraw::gobjMyCircleDraw	(	doublec	radius,
		point3< T > const &	center_,
		point3< T > const &	axis_,
		gobjMyCircle const &	cir_
	)			[inline]

Pass in a center point, an axis which the circle is draw about and a sampled circle.

Definition at line 751 of file graphmisc.h.

    : scalex(radius), scaley(radius), center(center_), 
      axis(axis_), cir(cir_) {}

---

Member Function Documentation

void gobjMyCircleDraw::draw

(

)

[virtual]

Draw a 2D circle in 3D space.

Implements gobj.

Definition at line 365 of file graphmisc.cpp.

References axis, center, cir, point3< T >::distance(), point3< T >::dot(), crossproduct::evalxyz(), GOBJDEBUGCODE, gobjMyCircle::N, gobjMyCircle::ptx, gobjMyCircle::pty, scalex, scaley, point3< T >::x, point3< T >::y, and point3< T >::z.

Referenced by display(), and graphicsImmediateDeferredTest::display01().

{
  GOBJDEBUGCODE
  uintc const N(cir.N);
  float * const ptx(cir.ptx);
  float * const pty(cir.pty);

  glPushMatrix();

  glTranslatef(center.x,center.y,center.z);

  if (axis!=zaxis)
  {
    assert(axis!=point3<double>(0,0,0));

    point3<double> N;
    crossproduct::evalxyz(N,zaxis,axis);

    double angle = acos( axis.dot(zaxis) / axis.distance() );
    angle *= 180.0/PI;
    glRotated(angle,N.x,N.y,N.z);
  }

  //glBegin(GL_LINE_LOOP);
  glBegin(GL_LINE);

  if ( (scalex==1.0)&&(scaley==1.0))
  {
    for (uint i=0; i<N-1; ++i)
    {
      glVertex2f(ptx[i],pty[i]);
      glVertex2f(ptx[i+1],pty[i+1]);
    }
  }
  else
  {
    for (uint i=0; i<N-1; ++i)
    {
      glVertex2f(ptx[i]*scalex,pty[i]*scaley);
      glVertex2f(ptx[i+1]*scalex,pty[i+1]*scaley);
    }
  }
    //glVertex2f(ptx[i]*radius,pty[i]*radius);

  glEnd();

  glPopMatrix();
}

void gobjMyCircleDraw::radiusset

(

doublec

radius

)

[inline]

Definition at line 712 of file graphmisc.h.

References scalex, and scaley.

Referenced by diskinttest::update02(), and diskinttest::update03lineline().

    { scalex=radius; scaley=radius; }

---

Member Data Documentation

point3<double> gobjMyCircleDraw::axis

The circles normal, by default is the z-axis.

Definition at line 707 of file graphmisc.h.

Referenced by draw(), diskinttest::update01(), diskinttest::update02(), and diskinttest::update03lineline().

point3<double> gobjMyCircleDraw::center

Translate to center before drawing.

Definition at line 704 of file graphmisc.h.

Referenced by draw(), diskinttest::update01(), diskinttest::update02(), and diskinttest::update03lineline().

gobjMyCircle const& gobjMyCircleDraw::cir

Many drawings can share a common circle as a reference.

Definition at line 710 of file graphmisc.h.

Referenced by draw().

double gobjMyCircleDraw::scalex

Multiplier of the x component of the circle cir.

Definition at line 699 of file graphmisc.h.

Referenced by draw(), and radiusset().

double gobjMyCircleDraw::scaley

Multiplier of the y component of the circle cir.

Definition at line 701 of file graphmisc.h.

Referenced by draw(), and radiusset().

---

The documentation for this class was generated from the following files:

• graphicslib/graphmisc.h
• graphicslib/graphmisc.cpp