private Func <int, int, Vector3Float> vertexFunc; // 64 bits
public MinimalTriangle(Func <int, int, Vector3Float> vertexFunc, int faceIndex)
{
this.FaceIndex = faceIndex;
this.vertexFunc = vertexFunc;
var planeNormal = (vertex(1) - vertex(0)).Cross(vertex(2) - vertex(0)).GetNormal();
double distanceFromOrigin = vertex(0).Dot(planeNormal);
Plane = new PlaneFloat(new Vector3Float(planeNormal), (float)distanceFromOrigin);
center = new Vector3Float((vertex(0) + vertex(1) + vertex(2)) / 3);
var aabbMinXYZ = vertex(0).ComponentMin(vertex(1)).ComponentMin(vertex(2));
var aabbMaxXYZ = vertex(0).ComponentMax(vertex(1)).ComponentMax(vertex(2));
var aabb = new AxisAlignedBoundingBox(aabbMinXYZ, aabbMaxXYZ);
aabbSize = new Vector3Float(aabb.Size);
var normalLengths = new[] { Math.Abs(planeNormal.X), Math.Abs(planeNormal.Y), Math.Abs(planeNormal.Z) };
MajorAxis = (byte)normalLengths.Select((v, i) => new { Axis = i, Value = Math.Abs(v) }).OrderBy(o => o.Value).Last().Axis;
for (int i = 0; i < 3; i++)
{
boundsOnMajorAxis.Left = Math.Min(vertex(i)[xForMajorAxis], boundsOnMajorAxis.Left);
boundsOnMajorAxis.Right = Math.Max(vertex(i)[xForMajorAxis], boundsOnMajorAxis.Right);
boundsOnMajorAxis.Bottom = Math.Min(vertex(i)[yForMajorAxis], boundsOnMajorAxis.Bottom);
boundsOnMajorAxis.Top = Math.Max(vertex(i)[yForMajorAxis], boundsOnMajorAxis.Top);
}
}
public TriangleShape(Vector3 vertex0, Vector3 vertex1, Vector3 vertex2, MaterialAbstract material)
{
Vector3 planeNormal = Vector3Ex.Cross(vertex1 - vertex0, vertex2 - vertex0).GetNormal();
double distanceFromOrigin = Vector3Ex.Dot(vertex0, planeNormal);
Plane = new PlaneFloat(new Vector3Float(planeNormal), (float)distanceFromOrigin);
Material = material;
vertices[0] = new Vector3Float(vertex0);
vertices[1] = new Vector3Float(vertex1);
vertices[2] = new Vector3Float(vertex2);
center = new Vector3Float((vertex0 + vertex1 + vertex2) / 3);
var normalLengths = new [] { Math.Abs(planeNormal.X), Math.Abs(planeNormal.Y), Math.Abs(planeNormal.Z) };
MajorAxis = (byte)normalLengths.Select((v, i) => new { Axis = i, Value = Math.Abs(v) }).OrderBy(o => o.Value).Last().Axis;
for (int i = 0; i < 3; i++)
{
boundsOnMajorAxis.Left = Math.Min(vertices[i][xForMajorAxis], boundsOnMajorAxis.Left);
boundsOnMajorAxis.Right = Math.Max(vertices[i][xForMajorAxis], boundsOnMajorAxis.Right);
boundsOnMajorAxis.Bottom = Math.Min(vertices[i][yForMajorAxis], boundsOnMajorAxis.Bottom);
boundsOnMajorAxis.Top = Math.Max(vertices[i][yForMajorAxis], boundsOnMajorAxis.Top);
}
aabbMinXYZ = vertices[0].ComponentMin(vertices[1]).ComponentMin(vertices[2]);
aabbMaxXYZ = vertices[0].ComponentMax(vertices[1]).ComponentMax(vertices[2]);
}
public TriangleShape(Vector3 vertex0, Vector3 vertex1, Vector3 vertex2, MaterialAbstract material)
{
Vector3 planeNormal = Vector3.Cross(vertex1 - vertex0, vertex2 - vertex0).GetNormal();
double distanceFromOrigin = Vector3.Dot(vertex0, planeNormal);
plane = new PlaneFloat(new Vector3Float(planeNormal), (float)distanceFromOrigin);
Material = material;
vertices[0] = new Vector3Float(vertex0);
vertices[1] = new Vector3Float(vertex1);
vertices[2] = new Vector3Float(vertex2);
center = new Vector3Float((vertex0 + vertex1 + vertex2) / 3);
if (Math.Abs(planeNormal.x) > Math.Abs(planeNormal.y))
{
if (Math.Abs(planeNormal.x) > Math.Abs(planeNormal.z))
{
// mostly facing x axis
majorAxis = 0;
}
else if (Math.Abs(planeNormal.y) > Math.Abs(planeNormal.z))
{
// mostly facing z
majorAxis = 2;
}
}
else if (Math.Abs(planeNormal.y) > Math.Abs(planeNormal.z))
{
// mostly facing y
majorAxis = 1;
}
else
{
// mostly facing z
majorAxis = 2;
}
for (int i = 0; i < 3; i++)
{
boundsOnMajorAxis.Left = Math.Min(vertices[i][xForMajorAxis], boundsOnMajorAxis.Left);
boundsOnMajorAxis.Right = Math.Max(vertices[i][xForMajorAxis], boundsOnMajorAxis.Right);
boundsOnMajorAxis.Bottom = Math.Min(vertices[i][yForMajorAxis], boundsOnMajorAxis.Bottom);
boundsOnMajorAxis.Top = Math.Max(vertices[i][yForMajorAxis], boundsOnMajorAxis.Top);
}
}
