private PolygonShape CreatePortalShape(FixturePortal portal, bool previousVertex)
{
Vector2[] verts = new Vector2[3];
PolygonShape shape = (PolygonShape)FixtureExt.GetFixtureAttached(portal).Shape;
int i = 1;
if (previousVertex)
{
i = 0;
}
int iNext = (i + 1) % 2;
Transform2 t = portal.GetTransform();
t.MirrorX = false;
t.Size = Math.Abs(t.Size);
int index = (portal.Position.EdgeIndex + i) % Actor.Vertices.Count;
verts[0] = Vector2Ext.Transform(Portal.GetVerts(portal)[iNext], t.GetMatrix());
verts[1] = Actor.GetFixtureContour(Actor)[index];
verts[2] = Vector2Ext.Transform(Portal.GetVerts(portal)[iNext] + new Vector2(-FixturePortal.EdgeMargin, 0), t.GetMatrix());
verts = MathExt.SetWinding(verts, false);
return new PolygonShape(new FarseerPhysics.Common.Vertices(verts.Select(v => (Xna.Framework.Vector2)v)), 0);
}
private PolygonShape CreatePortalShape(FixturePortal portal, FixturePortal portalNext)
{
Debug.Assert(portal.Position.EdgeIndex == portalNext.Position.EdgeIndex);
Debug.Assert(portal.Position.EdgeT < portalNext.Position.EdgeT);
Vector2[] verts = new Vector2[4];
{
Transform2 t0 = portal.GetTransform();
t0.MirrorX = false;
t0.Size = Math.Abs(t0.Size);
verts[0] = Vector2Ext.Transform(Portal.GetVerts(portal)[0], t0.GetMatrix());
verts[1] = Vector2Ext.Transform(Portal.GetVerts(portal)[0] + new Vector2(-FixturePortal.EdgeMargin, 0), t0.GetMatrix());
}
{
Transform2 t1 = portalNext.GetTransform();
t1.MirrorX = false;
t1.Size = Math.Abs(t1.Size);
verts[2] = Vector2Ext.Transform(Portal.GetVerts(portalNext)[1] + new Vector2(-FixturePortal.EdgeMargin, 0), t1.GetMatrix());
verts[3] = Vector2Ext.Transform(Portal.GetVerts(portalNext)[1], t1.GetMatrix());
}
verts = MathExt.SetWinding(verts, false);
return new PolygonShape(new FarseerPhysics.Common.Vertices(verts.Select(v => (Xna.Framework.Vector2)v)), 0);
}