internal static Point3D Rotate(Point3D vertex, Axis axis, double angle)
{
//calculate offset values
var xCenter = Math.Abs(screen.X / 2);
var yCenter = Math.Abs(screen.Y / 2);
var zCenter = Math.Abs(zDistanceMinMax.X - zDistanceMinMax.Y) / 2;
//our distance vector - we need this?
//double[] distanceVector = { xCenter, yCenter, zCenter };
//base matrix representation of our vertex:
double[,] baseVertexMtx = { { vertex.X, vertex.Y, vertex.Z, 1 } };
//post rotation processed matrix
double[,] rotatedMtx;
switch (axis)
{
default:
case Axis.X:
rotatedMtx = MtxHelper.MtxMultiply(baseVertexMtx, RotateXMatrix(angle));
break;
case Axis.Y:
rotatedMtx = MtxHelper.MtxMultiply(baseVertexMtx, RotateYMatrix(angle));
break;
case Axis.Z:
rotatedMtx = MtxHelper.MtxMultiply(baseVertexMtx, RotateZMatrix(angle));
break;
}
//return new rotated 3d point:
return(new Point3D(rotatedMtx[0, 0], rotatedMtx[0, 1], rotatedMtx[0, 2]));
}
internal static Point3D Transition(Point3D vertex, Axis axis, double value)
{
//base matrix representation of our vertex:
double[,] baseVertexMtx = { { vertex.X, vertex.Y, vertex.Z, 1 } };
//post transition processed matrix:
double[,] transitionedMtx = MtxHelper.MtxMultiply(baseVertexMtx, TransitioningMatrix(axis, value));
//return new rotated 3d point:
return(new Point3D(transitionedMtx[0, 0], transitionedMtx[0, 1], transitionedMtx[0, 2]));
}
//projections implementation:
//orthographic:
public static Point3D Orthographic(Point3D vertex)
{
//base matrix representation of our vertex:
double[,] baseVertexMtx = { { vertex.X, vertex.Y, vertex.Z, 1 } };
//orthographic matrix representation
double[,] orthographicMtx =
{
{ 1, 0, 0, 0 },
{ 0, 1, 0, 0 },
{ 0, 0, 1, 0 },
{ 0, 0, 0, 1 }
};
//resulted processed matrix
double[,] processedMtx = MtxHelper.MtxMultiply(baseVertexMtx, orthographicMtx);
return(new Point3D(processedMtx[0, 0], processedMtx[0, 1], processedMtx[0, 2]));
}
//perspective:
public static Point3D Perspective(Point3D vertex)
{
//base matrix representation of our vertex:
double[,] baseVertexMtx = { { vertex.X, vertex.Y, vertex.Z, 1 } };
//calculate S(Z) as in formula
var sZ = 1 / (1 + (vertex.Z / userPov.Z));
//perspective matrix representation
double[,] perspectiveMtx =
{
{ sZ, 0, 0, 0 },
{ 0, sZ, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 1 }
};
//resulted processed matrix
double[,] processedMtx = MtxHelper.MtxMultiply(baseVertexMtx, perspectiveMtx);
return(new Point3D(processedMtx[0, 0], processedMtx[0, 1], processedMtx[0, 2]));
}
//oblique:
public static Point3D Oblique(Point3D vertex, double angle = 90.0)
{
//base matrix representation of our vertex:
double[,] baseVertexMtx = { { vertex.X, vertex.Y, vertex.Z, 1 } };
//cos and sin angle calculation
var cos = (Math.Cos(angle * (Math.PI / 180)));
var sin = (Math.Sin(angle * (Math.PI / 180)));
//oblique matrix representation (Cabinet)
double[,] obliqueMtx =
{
{ 1, 0, 0, 0 },
{ 0, 1, 0, 0 },
{ cos / 2, sin / 2, 1, 0 },
{ 0, 0, 0, 1 }
};
//resulted processed matrix
double[,] processedMtx = MtxHelper.MtxMultiply(baseVertexMtx, obliqueMtx);
return(new Point3D(processedMtx[0, 0], processedMtx[0, 1], processedMtx[0, 2]));
}
