drawing a polygon with gdi+ and a vector of points

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I have a vector of PointF's and I'm trying to draw a polygon with GDI+:

void Polygons::create_polygons(CDC& dc, std::array<Gdiplus::Color, 6>& cols)

{

    Gdiplus::Graphics gr{ dc };

    find_poly_vertices();

    Gdiplus::Pen pen{ Gdiplus::Color(255,0,0,0) };

    auto old_brush = dc.GetCurrentBrush();

    for (int i = 0; i != points.size(); ++i)

    {



        Gdiplus::SolidBrush br{ cols[i] };

        gr.DrawPolygon(&pen, points[i], points[i].size());

        gr.FillPolygon(&br, points[i], points[i].size());

    }

    dc.SelectObject(old_brush);

}

the find_poly_vertices() saves the points of the polygon in an array of vectors in Polygons.

when I compile in visual studio I get error C2664:

cannot convert argument 2 from"std::vector<Gdiplus::PointF,std::allocator<_Ty>>" to "const Gdiplus::PointF *"

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

1

If you read the error, what do you think it means? What do you think might be a way to solve it?
– Some programmer dude
Nov 14 at 7:57

@paddy thanks! std::vector::data() solved it
– Amer Dakak
Nov 14 at 8:01

Baffles me that you would choose to show the function that doesn't contain the error...
– paddy
Nov 14 at 8:01

@paddy what do you mean? the line gr.DrawPolygon(&pen, points[i], points[i].size()); and gr.FillPolygon(&br, points[i], points[i].size()); in this function are underlined
– Amer Dakak
Nov 14 at 8:04

@AmerDakak For future questions, please read about how to ask good questions, as well as this question checklist. Besides showing the full and complete error output, also add comments at the lines where the errors are.
– Some programmer dude
Nov 14 at 8:07

add a comment |

up vote
0
down vote

favorite

I have a vector of PointF's and I'm trying to draw a polygon with GDI+:

void Polygons::create_polygons(CDC& dc, std::array<Gdiplus::Color, 6>& cols)

{

    Gdiplus::Graphics gr{ dc };

    find_poly_vertices();

    Gdiplus::Pen pen{ Gdiplus::Color(255,0,0,0) };

    auto old_brush = dc.GetCurrentBrush();

    for (int i = 0; i != points.size(); ++i)

    {



        Gdiplus::SolidBrush br{ cols[i] };

        gr.DrawPolygon(&pen, points[i], points[i].size());

        gr.FillPolygon(&br, points[i], points[i].size());

    }

    dc.SelectObject(old_brush);

}

the find_poly_vertices() saves the points of the polygon in an array of vectors in Polygons.

when I compile in visual studio I get error C2664:

cannot convert argument 2 from"std::vector<Gdiplus::PointF,std::allocator<_Ty>>" to "const Gdiplus::PointF *"

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

1

If you read the error, what do you think it means? What do you think might be a way to solve it?
– Some programmer dude
Nov 14 at 7:57

@paddy thanks! std::vector::data() solved it
– Amer Dakak
Nov 14 at 8:01

Baffles me that you would choose to show the function that doesn't contain the error...
– paddy
Nov 14 at 8:01

@paddy what do you mean? the line gr.DrawPolygon(&pen, points[i], points[i].size()); and gr.FillPolygon(&br, points[i], points[i].size()); in this function are underlined
– Amer Dakak
Nov 14 at 8:04

@AmerDakak For future questions, please read about how to ask good questions, as well as this question checklist. Besides showing the full and complete error output, also add comments at the lines where the errors are.
– Some programmer dude
Nov 14 at 8:07

add a comment |

up vote
0
down vote

favorite

I have a vector of PointF's and I'm trying to draw a polygon with GDI+:

void Polygons::create_polygons(CDC& dc, std::array<Gdiplus::Color, 6>& cols)

{

    Gdiplus::Graphics gr{ dc };

    find_poly_vertices();

    Gdiplus::Pen pen{ Gdiplus::Color(255,0,0,0) };

    auto old_brush = dc.GetCurrentBrush();

    for (int i = 0; i != points.size(); ++i)

    {



        Gdiplus::SolidBrush br{ cols[i] };

        gr.DrawPolygon(&pen, points[i], points[i].size());

        gr.FillPolygon(&br, points[i], points[i].size());

    }

    dc.SelectObject(old_brush);

}

the find_poly_vertices() saves the points of the polygon in an array of vectors in Polygons.

when I compile in visual studio I get error C2664:

cannot convert argument 2 from"std::vector<Gdiplus::PointF,std::allocator<_Ty>>" to "const Gdiplus::PointF *"

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

I have a vector of PointF's and I'm trying to draw a polygon with GDI+:

void Polygons::create_polygons(CDC& dc, std::array<Gdiplus::Color, 6>& cols)

{

    Gdiplus::Graphics gr{ dc };

    find_poly_vertices();

    Gdiplus::Pen pen{ Gdiplus::Color(255,0,0,0) };

    auto old_brush = dc.GetCurrentBrush();

    for (int i = 0; i != points.size(); ++i)

    {



        Gdiplus::SolidBrush br{ cols[i] };

        gr.DrawPolygon(&pen, points[i], points[i].size());

        gr.FillPolygon(&br, points[i], points[i].size());

    }

    dc.SelectObject(old_brush);

}

the find_poly_vertices() saves the points of the polygon in an array of vectors in Polygons.

when I compile in visual studio I get error C2664:

cannot convert argument 2 from"std::vector<Gdiplus::PointF,std::allocator<_Ty>>" to "const Gdiplus::PointF *"

c++ gdi+

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

edited Nov 14 at 7:58

asked Nov 14 at 7:52

Amer Dakak

asked Nov 14 at 7:52

Amer Dakak

asked Nov 14 at 7:52

Amer Dakak

1

If you read the error, what do you think it means? What do you think might be a way to solve it?
– Some programmer dude
Nov 14 at 7:57

@paddy thanks! std::vector::data() solved it
– Amer Dakak
Nov 14 at 8:01

Baffles me that you would choose to show the function that doesn't contain the error...
– paddy
Nov 14 at 8:01

@paddy what do you mean? the line gr.DrawPolygon(&pen, points[i], points[i].size()); and gr.FillPolygon(&br, points[i], points[i].size()); in this function are underlined
– Amer Dakak
Nov 14 at 8:04

@AmerDakak For future questions, please read about how to ask good questions, as well as this question checklist. Besides showing the full and complete error output, also add comments at the lines where the errors are.
– Some programmer dude
Nov 14 at 8:07

add a comment |

1

If you read the error, what do you think it means? What do you think might be a way to solve it?
– Some programmer dude
Nov 14 at 7:57

@paddy thanks! std::vector::data() solved it
– Amer Dakak
Nov 14 at 8:01

Baffles me that you would choose to show the function that doesn't contain the error...
– paddy
Nov 14 at 8:01

@paddy what do you mean? the line gr.DrawPolygon(&pen, points[i], points[i].size()); and gr.FillPolygon(&br, points[i], points[i].size()); in this function are underlined
– Amer Dakak
Nov 14 at 8:04

@AmerDakak For future questions, please read about how to ask good questions, as well as this question checklist. Besides showing the full and complete error output, also add comments at the lines where the errors are.
– Some programmer dude
Nov 14 at 8:07

If you read the error, what do you think it means? What do you think might be a way to solve it?
– Some programmer dude
Nov 14 at 7:57

@paddy thanks! std::vector::data() solved it
– Amer Dakak
Nov 14 at 8:01

Baffles me that you would choose to show the function that doesn't contain the error...
– paddy
Nov 14 at 8:01

@paddy what do you mean? the line gr.DrawPolygon(&pen, points[i], points[i].size()); and gr.FillPolygon(&br, points[i], points[i].size()); in this function are underlined
– Amer Dakak
Nov 14 at 8:04

@AmerDakak For future questions, please read about how to ask good questions, as well as this question checklist. Besides showing the full and complete error output, also add comments at the lines where the errors are.
– Some programmer dude
Nov 14 at 8:07

add a comment |

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