Constructor of array of Point

german or english, which language do you prefer ?

Actually, you don't need an multidimensional array here if you only want to pass it to the Matrix constructor. You just add three Points to the array like this:

cli::array<System::Drawing::Point^>^ plgpts; // no dimension means single-dimension
plgpts = gcnew cli::array<System::Drawing::Point^>(3); // 3 for 3 Points

// define Points
System::Drawing::Point^ pt1; 
System::Drawing::Point^ pt2; 
System::Drawing::Point^ pt3; 
pt1=gcnew System::Drawing::Point::Point(0,0); 
pt2=gcnew System::Drawing::Point::Point(0,2048); 
pt3=gcnew System::Drawing::Point::Point(1536,2048); 

// add them to the array
plgpts[0] = pt1;
plgpts[1] = pt2;
plgpts[2] = pt3;

or:

cli::array<System::Drawing::Point^>^ plgpts = gcnew cli::array<System::Drawing::Point^>{pt1, pt2, pt3};

or:

cli::array<System::Drawing::Point^>^ plgpts = {pt1, pt2, pt3};

with kind regards,

Probe-Nutzer

*amp*rea

ich weiß ein bisschen Deutsch aber nicht genug um technische Sachen zu sprechen, jjeje!!

I have proved your suggestions and all of them have the same problem:

error C2059: syntax error : ';'

3 times, one for each of those lines

pt1=gcnew (System::Drawing::Point::Point(0,0));
	pt2=gcnew (System::Drawing::Point::Point(0,2048));
	pt3=gcnew (System::Drawing::Point::Point(1536,2048));

and too
Error C2665: 'System::Drawing::Drawing2D::Matrix::Matrix' : none of the 6 overloads could convert all the argument types

in

L=gcnew( System::Drawing::Drawing2D::Matrix::Matrix(rect,plgpts));

but I supposed that it comes from the error of the points.

my mistake, try it like this:

// omit one ::Point in all of the Point definitions
pt1=gcnew System::Drawing::Point(0,0);
...

the same with Matrix:

L=gcnew System::Drawing::Drawing2D::Matrix(rect,plgpts);

with kind regards,

Probe-Nutzer

*amp*rea

I have made these changes and now I have got another error but I don't understand why, it says something about RectangleF and I am not using it. If I change my Rectangle into RectangleF there is also another error.

System::Drawing::Rectangle^ rect;
        System::Drawing::Bitmap^ img;
	img=gcnew System::Drawing::Bitmap(image);
	int nc=img->Width;
	int nr=img->Height;
        rect=System::Drawing::Rectangle(0, 0, nc, nr);

        L=gcnew System::Drawing::Drawing2D::Matrix(rect,plgpts);

error C2664: 'System::Drawing::Drawing2D::Matrix::Matrix(System::Drawing::RectangleF,cli::array<Type,dimension> ^)' : cannot convert parameter 1 from 'System::Drawing::Rectangle ^' to 'System::Drawing::RectangleF'

if I declare it as RectangleF this is the error (the same as before)

error C2664: 'System::Drawing::Drawing2D::Matrix::Matrix(System::Drawing::RectangleF,cli::array<Type,dimension> ^)' : cannot convert parameter 1 from 'System::Drawing::RectangleF ^' to 'System::Drawing::RectangleF'

both of the System::Drawing::Drawing2D::Matrix constructors with Rectangle(F) arguments expect a value type as first argument. Look at the declaration:

public:
Matrix (
	Rectangle rect, 
	array<Point>^ plgpts
)

There's no "^" next to Rectangle, therefore:

System::Drawing::Rectangle rect;

is the right way to declare the rect.

with kind regards,

Probe-Nutzer

*amp*rea

System::Drawing::Drawing2D::Matrix^ L;
	System::Drawing::Rectangle rect;
        cli::array<System::Drawing::Point^>^ plgpts; 
	plgpts = gcnew cli::array<System::Drawing::Point^>(3); // 3 for 3 Points

	System::Drawing::Point^ pt1;
	System::Drawing::Point^ pt2;
	System::Drawing::Point^ pt3;

	pt1=gcnew System::Drawing::Point(0,0);
	pt2=gcnew System::Drawing::Point(0,2048);
	pt3=gcnew System::Drawing::Point(2048,1536);

	plgpts[0] = pt1;
	plgpts[1] = pt2;
	plgpts[2] = pt3;

	System::Drawing::Bitmap^ img;

	img=gcnew System::Drawing::Bitmap(image);
	int nc=img->Width;
	int nr=img->Height;
	rect=System::Drawing::Rectangle(0, 0, nc, nr);

	L=gcnew System::Drawing::Drawing2D::Matrix(rect,plgpts);

this is what I have until now. Now that there is no problem in the first parameter there is another one with the second one. Puff!!it has no end

error C2664: 'System::Drawing::Drawing2D::Matrix::Matrix(System::Drawing::RectangleF,cli::array<Type,dimension> ^)' : cannot convert parameter 2 from 'cli::array<Type> ^' to 'cli::array<Type,dimension> ^'

yet another change:

System::Drawing::Drawing2D::Matrix^ L;
    System::Drawing::Rectangle rect;
        cli::array<System::Drawing::Point>^ plgpts; 
    plgpts = gcnew cli::array<System::Drawing::Point>(3); // 3 for 3 Points

    System::Drawing::Point pt1;
    System::Drawing::Point pt2;
    System::Drawing::Point pt3;

    pt1=System::Drawing::Point(0,0);
    pt2=System::Drawing::Point(0,2048);
    pt3=System::Drawing::Point(2048,1536);

    plgpts[0] = pt1;
    plgpts[1] = pt2;
    plgpts[2] = pt3;

    System::Drawing::Bitmap^ img;

    img=gcnew System::Drawing::Bitmap(image);
    int nc=img->Width;
    int nr=img->Height;
    rect=System::Drawing::Rectangle(0, 0, nc, nr);

    L=gcnew System::Drawing::Drawing2D::Matrix(rect,plgpts);

with kind regards,

Probe-Nutzer

*amp*rea

puff!!it's unbelievable that nothing works. Now the errors are in the points

error C2440: '=' : cannot convert from 'System::Drawing::Point ^' to 'System::Drawing::Point'

The constructor of Matrix in the second parameter needs this
cli::arraySystem::Drawing::Point,1^plgpts

maybe there is something wrong with that 1, or we don't need Point to be Point^ but if I try there's the error of above.

change the array's initialization:

cli::array<System::Drawing::Point>^ plgpts = gcnew cli::array<System::Drawing::Point>{System::Drawing::Point(0,0), System::Drawing::Point(0,2048), System::Drawing::Point(2048,1536)};

then the following lines:

plgpts = gcnew cli::array<System::Drawing::Point>(3); // 3 for 3 Points

    System::Drawing::Point pt1;
    System::Drawing::Point pt2;
    System::Drawing::Point pt3;

    pt1=System::Drawing::Point(0,0);
    pt2=System::Drawing::Point(0,2048);
    pt3=System::Drawing::Point(2048,1536);

    plgpts[0] = pt1;
    plgpts[1] = pt2;
    plgpts[2] = pt3;

can be removed.

with kind regards,

Probe-Nutzer

*amp*rea

wunderbaaaar!!!

IT WORKS!!!!!
Thank you so much for your help and dedication!!