public static Matrix3d GetMapMatrix(Coordinates center, double fieldWidth, double fieldHeight, double rotation)
{
double offsetX = 0;
double offsetY = 0;
offsetX = -(((center.Lng + 180 - (fieldWidth / 2)) / 360));
offsetY = -((1 - ((center.Lat + 90 + (fieldHeight / 2)) / 180)));
var mat = new Matrix2d();
double scaleX = 0;
double scaleY = 0;
scaleX = 360 / fieldWidth;
scaleY = 180 / fieldHeight;
mat = mat * Matrix2d.Translation(offsetX, offsetY);
mat = mat * Matrix2d.Scaling(scaleX, scaleY);
if (rotation != 0)
{
mat = mat * Matrix2d.Translation(-.5, -.5);
mat = mat * Matrix2d.Rotation(rotation);
mat = mat * Matrix2d.Translation(.5, .5);
}
return FromMatrix2d(mat);
}
public static Matrix2d Translation(double x, double y)
{
var mat = new Matrix2d {M31 = x, M32 = y};
return mat;
}
public static Matrix3d FromMatrix2d(Matrix2d mat)
{
var mat3d = CreateIdentity();
mat3d.M11 = mat.M11;
mat3d.M12 = mat.M12;
mat3d.M13 = mat.M13;
mat3d.M21 = mat.M21;
mat3d.M22 = mat.M22;
mat3d.M23 = mat.M23;
mat3d.M31 = mat.M31;
mat3d.M32 = mat.M32;
mat3d.M33 = mat.M33;
mat3d._isNotKnownToBeIdentity = true;
return mat3d;
}
public static Matrix2d Scaling(double x, double y)
{
var mat = new Matrix2d {M11 = x, M22 = y};
return mat;
}
public static Matrix2d Rotation(double angle)
{
var mat = new Matrix2d
{
M11 = Math.Cos(angle),
M21 = -Math.Sin(angle),
M12 = Math.Sin(angle),
M22 = Math.Cos(angle)
};
return mat;
}
public static Matrix2d Translation(double x, double y)
{
Matrix2d mat = new Matrix2d();
mat.M31 = x;
mat.M32 = y;
return mat;
}
public static Matrix2d Scaling(double x, double y)
{
Matrix2d mat = new Matrix2d();
mat.M11 = x;
mat.M22 = y;
return mat;
}
public static Matrix2d Rotation(double angle)
{
Matrix2d mat = new Matrix2d();
mat.M11 = Math.Cos(angle);
mat.M21 = -Math.Sin(angle);
mat.M12 = Math.Sin(angle);
mat.M22 = Math.Cos(angle);
return mat;
}
