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#include <Precision.hxx>
#include <Standard_Failure.hxx>
void Compute(const Standard_Real P1,
const Standard_Real P2,
const Standard_Real Ra,
const Standard_Real Rb,
const Coord& Xd,
const Coord& Yd,
const Coord& O,
Bound& B) {
Standard_Real Teta1;
Standard_Real Teta2;
if (P2<P1) {
Teta1 = P2;
Teta2 = P1;
}
else {
Teta1 = P1;
Teta2 = P2;
}
Standard_Real Delta =Abs(Teta2-Teta1);
if (Delta > 2. * PI) {
Teta1 = 0.;
Teta2 = 2. * PI;
}
else {
if (Teta1 < 0.) {
do { Teta1+=2.*PI;} while (Teta1< 0.);
}
else if (Teta1> 2.*PI) {
do { Teta1-=2.*PI;} while (Teta1> 2.*PI);
}
Teta2 = Teta1 + Delta;
}
// One places already both ends
Standard_Real Cn1,Sn1,Cn2,Sn2;
Cn1 = Cos(Teta1); Sn1 = Sin(Teta1);
Cn2 = Cos(Teta2); Sn2 = Sin(Teta2);
B.Add(Point(O +Ra*Cn1*Xd +Rb*Sn1*Yd));
B.Add(Point(O +Ra*Cn2*Xd +Rb*Sn2*Yd));
Standard_Real Ram,Rbm;
if (Delta > PI/8.) {
// Main radiuses to take into account only 8 points (/cos(Pi/8.))
Ram=Ra/0.92387953251128674;
Rbm=Rb/0.92387953251128674;
}
else {
// Main radiuses to take into account the arrow
Standard_Real tc=cos(Delta/2);
Ram=Ra/tc;
Rbm=Rb/tc;
}
B.Add(Point(O +Ram*Cn1*Xd +Rbm*Sn1*Yd));
B.Add(Point(O +Ram*Cn2*Xd +Rbm*Sn2*Yd));
// cos or sin PI/4.
#define PI4 0.70710678118654746
// 8 points of the polygon
#define addP0 B.Add(Point(O +Ram*Xd ))
#define addP1 B.Add(Point(O +Ram*PI4*Xd +Rbm*PI4*Yd))
#define addP2 B.Add(Point(O +Rbm*Yd))
#define addP3 B.Add(Point(O -Ram*PI4*Xd +Rbm*PI4*Yd))
#define addP4 B.Add(Point(O -Ram*Xd ))
#define addP5 B.Add(Point(O -Ram*PI4*Xd -Rbm*PI4*Yd))
#define addP6 B.Add(Point(O -Rbm*Yd));
#define addP7 B.Add(Point(O +Ram*PI4*Xd -Rbm*PI4*Yd))
Standard_Integer deb = (Standard_Integer )( Teta1/(PI/4.));
Standard_Integer fin = (Standard_Integer )( Teta2/(PI/4.));
deb++;
if (deb>fin) return;
switch (deb) {
case 1 :
{
addP1;
if (fin <= 1) break;
}
case 2 :
{
addP2;
if (fin <= 2) break;
}
case 3 :
{
addP3;
if (fin <= 3) break;
}
case 4 :
{
addP4;
if (fin <= 4) break;
}
case 5 :
{
addP5;
if (fin <= 5) break;
}
case 6 :
{
addP6;
if (fin <= 6) break;
}
case 7 :
{
addP7;
if (fin <= 7) break;
}
case 8 :
{
addP0;
if (fin <= 8) break;
}
case 9 :
{
addP1;
if (fin <= 9) break;
}
case 10 :
{
addP2;
if (fin <= 10) break;
}
case 11:
{
addP3;
if (fin <= 11) break;
}
case 12:
{
addP4;
if (fin <= 12) break;
}
case 13:
{
addP5;
if (fin <= 13) break;
}
case 14:
{
addP6;
if (fin <= 14) break;
}
case 15:
{
addP7;
if (fin <= 15) break;
}
}
}
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