# Exemples de la distribution

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pascal.xp [ source ] [ fermer ]
```/* -*-ePiX-*- */
#include "epix.h"
using namespace ePiX;

int main()
{
bounding_box(P(-2,-2),P(2,2));
unitlength("1in");
picture(3,3);
offset(1.25, 0);

begin();
crop();

P V = P(2,-0.25),   W = P(3,1);
P P1=P(-1.5,-1),    P2 = P1 + V,       P3 = P1 + 1.5*V;    // points
P Q1 = P(-1,1),     Q2 = Q1 + 0.5*W,   Q3 = Q1 + W;

segment L12(P1, Q2),   L13(P1, Q3);
segment L21(P2, Q1),   L23(P2, Q3);
segment L31(P3, Q1),   L32(P3, Q2);

P R1 = L12*L21,    R2 = L13*L31,    R3 = L32*L23;   // points of intersection

dot(P1, P(0,-2), "\$P_1\$", b);   dot(Q1, P(0,2), "\$Q_1\$", t);
dot(P2, P(0,-2), "\$P_2\$", b);   dot(Q2, P(0,2), "\$Q_2\$", t);
dot(P3, P(0,-2), "\$P_3\$", b);   dot(Q3, P(0,2), "\$Q_3\$", t);

red();  L12.draw();  L21.draw();  L13.draw();  L31.draw();  L32.draw();  L23.draw();

green();    Line(P1,P3);    Line(Q1,Q3);

blue();
box(R1, P(4,2), "\$p_1\$", r);
box(R2, P(4,2), "\$p_2\$", r);
box(R3, P(4,2), "\$p_3\$", r);

dashed();    Line(R1,R3);
end();
}
```