private static Matrix Sum(TokenType left, TokenType right, bool negative)
{
Matrix l = left as Matrix;
Matrix r = right as Matrix;
Matrix ret = Matrix.CreateUnsafeMatrix(l.rows, l.columns);
if (l.rows != r.rows || l.columns != r.columns)
{
throw new ExprCoreException("행과 열이 다른 행렬은 더할 수 없습니다.");
}
for (int i = 0; i < l.rows; i++)
{
for (int j = 0; j < l.columns; j++)
{
TokenType lParam = l.data[i, j];
TokenType rParam = r.data[i, j];
if (lParam is Fraction && rParam is Fraction)
{
ret.data[i, j] = negative ? FractionOperators.Subtract(lParam, rParam) : FractionOperators.Add(lParam, rParam);
}
else
{
throw new ExprCoreException("상수인 행렬만 더할 수 있습니다.");
}
}
}
return(ret);
}
public static Vec2 Subtract(TokenType left, TokenType right)
{
Vec2 l = left as Vec2;
Vec2 r = right as Vec2;
Vector.CheckNumberic(l, r);
return(new Vec2(FractionOperators.Subtract(l.X, r.X), FractionOperators.Subtract(l.Y, r.Y)));
}
public static Vec3 Cross(TokenType left, TokenType right)
{
Vec3 l = left as Vec3;
Vec3 r = right as Vec3;
Vector.CheckNumberic(r);
Fraction x = FractionOperators.Subtract(FractionOperators.Multiply(l.Y, r.Z), FractionOperators.Multiply(l.Z, r.Y));
Fraction y = FractionOperators.Subtract(FractionOperators.Multiply(l.Z, r.X), FractionOperators.Multiply(l.X, r.Z));
Fraction z = FractionOperators.Subtract(FractionOperators.Multiply(l.X, r.Y), FractionOperators.Multiply(l.Y, r.X));
return(new Vec3(x, y, z));
}