apitrigeom.h File Reference

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Functions
void	rt_tri_box (void *tex, vector min, vector max)
void	rt_tri_cylinder (void *tex, vector ctr, vector axis, apiflt rad)
void	rt_tri_fcylinder (void *tex, vector ctr, vector axis, apiflt rad)
void	rt_tri_plane (void *tex, vector ctr, vector norm)
void	rt_tri_ring (void *tex, vector ctr, vector norm, apiflt a, apiflt b)

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Function Documentation

void rt_tri_box	(	void *	tex,
		vector	min,
		vector	max
	)

Definition at line 180 of file apitrigeom.cpp.

References rt_tri(), rt_vector(), vector::x, vector::y, and vector::z.

                                                    {
  /* -XY face */
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(min.x, max.y, min.z), 
              rt_vector(max.x, max.y, min.z));
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(max.x, max.y, min.z), 
              rt_vector(max.x, min.y, min.z));

  /* +XY face */
  rt_tri(tex, rt_vector(min.x, min.y, max.z),
              rt_vector(max.x, max.y, max.z),
              rt_vector(min.x, max.y, max.z)); 
  rt_tri(tex, rt_vector(min.x, min.y, max.z),
              rt_vector(max.x, min.y, max.z),
              rt_vector(max.x, max.y, max.z)); 

  /* -YZ face */
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(min.x, max.y, max.z),
              rt_vector(min.x, min.y, max.z)); 
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(min.x, max.y, min.z),
              rt_vector(min.x, max.y, max.z)); 

  /* +YZ face */
  rt_tri(tex, rt_vector(max.x, min.y, min.z),
              rt_vector(max.x, min.y, max.z),
              rt_vector(max.x, max.y, max.z));
  rt_tri(tex, rt_vector(max.x, min.y, min.z),
              rt_vector(max.x, max.y, max.z),
              rt_vector(max.x, max.y, min.z));

  /* -XZ face */
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(min.x, min.y, max.z), 
              rt_vector(max.x, min.y, max.z));
  rt_tri(tex, rt_vector(min.x, min.y, min.z),
              rt_vector(max.x, min.y, max.z), 
              rt_vector(max.x, min.y, min.z));

  /* +XZ face */
  rt_tri(tex, rt_vector(min.x, max.y, min.z),
              rt_vector(max.x, max.y, max.z),
              rt_vector(min.x, max.y, max.z)); 
  rt_tri(tex, rt_vector(min.x, max.y, min.z),
              rt_vector(max.x, max.y, min.z),
              rt_vector(max.x, max.y, max.z)); 
}

void rt_tri_cylinder	(	void *	tex,
		vector	ctr,
		vector	axis,
		apiflt	rad
	)

Definition at line 128 of file apitrigeom.cpp.

References rt_fcylinder().

                                                                      {
  rt_fcylinder(tex, ctr, axis, rad);
}

void rt_tri_fcylinder	(	void *	tex,
		vector	ctr,
		vector	axis,
		apiflt	rad
	)

Definition at line 79 of file apitrigeom.cpp.

References CYLFACETS, MyVAddS, MyVCross, MyVNorm, rt_stri(), vector::x, vector::y, and vector::z.

                                                                       {
  vector x, y, z, tmp;
  double u, v, u2, v2;
  int j;
  vector p1, p2, p3, p4;
  vector n1, n2;

  z = axis;
  MyVNorm(&z);
  tmp.x = z.y - 2.1111111;
  tmp.y = -z.z + 3.14159267;
  tmp.z = z.x - 3.915292342341;
  MyVNorm(&z);
  MyVNorm(&tmp);
  MyVCross(&z, &tmp, &x);
  MyVNorm(&x);
  MyVCross(&x, &z, &y);
  MyVNorm(&y);

  for (j=0; j<CYLFACETS; j++) {
     u = rad * sin((6.28 * j) / (CYLFACETS - 1.0));
     v = rad * cos((6.28 * j) / (CYLFACETS - 1.0));
    u2 = rad * sin((6.28 * (j + 1.0)) / (CYLFACETS - 1.0));
    v2 = rad * cos((6.28 * (j + 1.0)) / (CYLFACETS - 1.0));

    p1.x = p1.y = p1.z = 0.0;
    p4 = p3 = p2 = p1;

    MyVAddS(u, &x, &p1, &p1);
    MyVAddS(v, &y, &p1, &p1);
    n1 = p1;
    MyVNorm(&n1);
    MyVAddS(1.0, &ctr, &p1, &p1);
  

    MyVAddS(u2, &x, &p2, &p2);
    MyVAddS(v2, &y, &p2, &p2);
    n2 = p2;
    MyVNorm(&n2);
    MyVAddS(1.0, &ctr, &p2, &p2);

    MyVAddS(1.0, &axis, &p1, &p3);
    MyVAddS(1.0, &axis, &p2, &p4);

    rt_stri(tex, p1, p2, p3, n1, n2, n1);
    rt_stri(tex, p3, p2, p4, n1, n2, n2);
  }
}

void rt_tri_plane	(	void *	tex,
		vector	ctr,
		vector	norm
	)

Definition at line 233 of file apitrigeom.cpp.

References rt_tri_ring().

                                                       {
  rt_tri_ring(tex, ctr, norm, 0.0, 10000.0);
} 

void rt_tri_ring	(	void *	tex,
		vector	ctr,
		vector	norm,
		apiflt	a,
		apiflt	b
	)

Definition at line 132 of file apitrigeom.cpp.

References MyVAddS, MyVCross, MyVNorm, RINGFACETS, rt_stri(), vector::x, vector::y, and vector::z.

Referenced by rt_tri_plane().

                                                                          {
  vector x, y, z, tmp;
  double u, v, u2, v2;
  int j;
  vector p1, p2, p3, p4;
  vector n1, n2;

  z = norm;
  MyVNorm(&z);
  tmp.x = z.y - 2.1111111;
  tmp.y = -z.z + 3.14159267;
  tmp.z = z.x - 3.915292342341;
  MyVNorm(&z);
  MyVNorm(&tmp);
  MyVCross(&z, &tmp, &x);
  MyVNorm(&x);
  MyVCross(&x, &z, &y);
  MyVNorm(&y);

  for (j=0; j<RINGFACETS; j++) {
     u = sin((6.28 * j) / (RINGFACETS - 1.0));
     v = cos((6.28 * j) / (RINGFACETS - 1.0));
    u2 = sin((6.28 * (j + 1.0)) / (RINGFACETS - 1.0));
    v2 = cos((6.28 * (j + 1.0)) / (RINGFACETS - 1.0));

    p1.x = p1.y = p1.z = 0.0;
    p4 = p3 = p2 = p1;

    MyVAddS(u, &x, &p1, &p1);
    MyVAddS(v, &y, &p1, &p1);
    n1 = p1;
    MyVNorm(&n1);
    MyVAddS(a, &n1, &ctr, &p1);
    MyVAddS(b, &n1, &ctr, &p3);

    MyVAddS(u2, &x, &p2, &p2);
    MyVAddS(v2, &y, &p2, &p2);
    n2 = p2;
    MyVNorm(&n2);
    MyVAddS(a, &n2, &ctr, &p2);
    MyVAddS(b, &n2, &ctr, &p4);

    rt_stri(tex, p1, p2, p3, norm, norm, norm);
    rt_stri(tex, p3, p2, p4, norm, norm, norm);

  }
}