public override Vertex Interpolate(Vertex other, float t)
{
var pos = Vector3.Lerp(Position, other.Position, t);
var norm = Vector3.Lerp(Normal, other.Normal, t);
var colorVertex = other as ColorVertex;
Color color = colorVertex == null ? Color : Color.Lerp(Color, (colorVertex).Color, t);
return new ColorVertex(pos, norm, color);
}
public void ClonePolygon()
{
Vertex a = new Vertex(new Vector3(0, 0, 0), Vector3.Zero);
Vertex b = new Vertex(new Vector3(0, 1, 0), Vector3.Zero);
Vertex c = new Vertex(new Vector3(1, 0, 0), Vector3.Zero);
Polygon abc = new Polygon(a, b, c);
Polygon abc2 = abc.Clone();
Assert.AreEqual(abc.Plane, abc2.Plane);
}
public void NormalWinding()
{
Vertex a = new Vertex(new Vector3(0, 0, 0), Vector3.Zero);
Vertex b = new Vertex(new Vector3(0, 1, 0), Vector3.Zero);
Vertex c = new Vertex(new Vector3(1, 0, 0), Vector3.Zero);
Polygon abc = new Polygon(a, b, c);
Polygon cba = new Polygon(c, b, a);
Vector3 abcNormal = Vector3.Cross(b.Position - a.Position, c.Position - a.Position);
Assert.AreEqual(abcNormal, abc.Plane.Normal);
Vector3 cbaNormal = Vector3.Cross(b.Position - c.Position, a.Position - c.Position);
Assert.AreEqual(cbaNormal, cba.Plane.Normal);
Assert.AreNotEqual(abc.Plane, cba.Plane);
cba.Flip();
Assert.AreEqual(abc.Plane, cba.Plane);
}
public override Vertex Interpolate(Vertex other, float t)
{
var b = base.Interpolate(other, t);
return new VertexTest(b.Position, b.Normal);
}
public virtual Vertex Interpolate(Vertex other, float t)
{
return new Vertex(Vector3.Lerp(Position, other.Position, t), Vector3.Lerp(Normal, other.Normal, t));
}
public Polygon(Vertex a, Vertex b, Vertex c)
:this(new[] { a, b, c })
{
}