public static MyMatrix FromVector2(Vector2 v)
{
MyMatrix ret = new MyMatrix(3, 1);
double[,] arr = new double[3, 1]
{
{ v.X },
{ v.Y },
{ 1.0 }
};
ret.SetValue(arr);
return(ret);
}
public static MyMatrix FromVector44(Vector4 v)
{
MyMatrix ret = new MyMatrix(5, 1);
double[,] arr = new double[5, 1]
{
{ v.X },
{ v.Y },
{ v.Z },
{ v.W },
{ 1.0 }
};
ret.SetValue(arr);
return(ret);
}
public static MyMatrix operator*(MyMatrix m1, MyMatrix m2)
{
if (m1.Cols != m2.Rows)
{
throw new ArgumentException("乘法：矩阵两边维度不匹配！");
}
MyMatrix ans = new MyMatrix(m1.Rows, m2.Cols);
for (int i = 0; i < ans.Rows; i++)
{
for (int j = 0; j < ans.Cols; j++)
{
for (int k = 0; k < m2.Rows; k++)
{
ans[i, j] += m1[i, k] * m2[k, j];
}
}
}
return(ans);
}
