void DrawLine(Base3D.Point p1, Base3D.Point p2, Pen pen)
{
if (!context.BeforeScreen(p1.X) || !context.BeforeScreen(p2.X))
{
return;
}
graphics.DrawLine(pen, (float)p1.Y, (float)p1.Z, (float)p2.Y, (float)p2.Z);
}
void DrawPoint(Base3D.Point point, Pen pen)
{
Base3D.Point p = point * cameraMatric;
if (!context.BeforeScreen(p.X))
{
return;
}
float r = 3;
graphics.DrawEllipse(pen,
(float)(p.Y - r), (float)(p.Z - r), r * 2, r * 2);
}
void DrawPolygon(Base3D.Polygon pol, List <Base3D.Point> points, Pen pen)
{
if (pol.indexes.Length < 3)
{
return;
}
var polyPoints = pol.Points(points);
if (hideInvisible)
{
if (polyPoints.Any(p => !context.BeforeScreen(p.X)))
{
return;
}
var v1 = polyPoints[1] - polyPoints[0];
var v2 = polyPoints[2] - polyPoints[0];
var prod = new Base3D.Point
{
X = v1.Y * v2.Z - v2.Y * v1.Z,
Y = v1.Z * v2.X - v2.Z * v1.X,
Z = v1.X * v2.Y - v2.X * v1.Y
};
if (prod.X > 0)
{
return;
}
if (prod.Length() == 0)
{
return;
}
}
var end = polyPoints.Aggregate((p1, p2) => { DrawLine(p1, p2, pen); return(p2); });
DrawLine(end, polyPoints.First(), pen);
}
