Computer graphics-code_2

#include <windows.h> #include <stdlib.h> #include <string.h> #include <tchar.h> #include < vector> #include <string> #include <time.h>using namespace std;typedef struct Point {//DOT structure public:int x; int y;struct Point (): X (0), y (0) {}struct points (int a, int b): X (a), Y (b) {}}point;typedef struct node {//Link table node Public:poi  NT data;struct Node *next = null;struct node ():d ata (0, 0), next (null) {}struct Node (int a, int b):d ata (A, B), Next (null) {}}node, *pnode;//global variable static TCHAR szwindowclass[] = _t ("Win32app"); static TCHAR sztitle[] = _t ("Win32 application"); HIN Stance HInst; UINT width = 800;//window width uint height = 600;//window height colorref bkg_clr = RGB (255, 255, 255);//Background color node stack;//stack Vector<point &  Gt points_set;//Polygon Point Set//function declaration lresult CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);//Message processing void display (HDC hdc);//wm_ Paint message response, drawing function/* Drawing related */void line (hdc hdc, int x_beg, int y_beg, int x_end, int y_end, COLORREF color = RGB (255, 255, 255), int line_width=1, int line_style= Ps_solid);//Draw line void ellipse (hdc hdc, int x_left, int y_top, int x_right, int y_bottom, COLORREF color = RGB (255, 255, 255  ), int line_width = 1, int line_style = ps_solid);//ellipse void rect (hdc hdc, int x_left, int y_top, int x_right, int y_bottom, COLORREF color = RGB (255, 255, 255), int line_width = 1, int line_style = ps_solid);//Rectangle void Polygon (hdc hdc, VECTOR&LT;P oint>* set, Colorref color = RGB (255, 255, 255), int line_width = 1, int line_style = ps_solid);//Draw polygon void Polygon_poi NTS ();//Polygon Point set generation/* Stack related */void setstackempty (pnode L);//Stack empty bool Isstackempty (pnode L);//Determine if stack is empty void Stackpush (Pnode l, Point e);//into the stack point Stackpop (Pnode L);//out of the stack/* implementation */void Scanlinefill (HDC hdc, int x, int y, colorref oldcolor, COLORREF newcol OR);//scan fills int WINAPI WinMain (hinstance hinstance,hinstance hprevinstance,lpstr lpcmdline,int ncmdshow) {wndclassex wcex;//initialization window class wcex.cbsize = sizeof (wndclassex); Wcex.style = Cs_hredraw | Cs_vredraw|cs_owndc;wcex.lpfnwndproc = Wndproc;wcex.cbclsextra = 0;wcex.cbwndextra = 0;wCex.hinstance = Hinstance;wcex.hicon = LoadIcon (hinstance, Makeintresource (idi_application)); wcex.hCursor = LoadCursor (null, idc_arrow); wcex.hbrbackground = (Hbrush) createsolidbrush (BKG_CLR); wcex.lpszmenuname = null; Wcex.lpszclassname = SZWINDOWCLASS;WCEX.HICONSM = LoadIcon (Wcex.hinstance, Makeintresource (IDI_APPLICATION)); RegisterClassEx (&wcex)) {//Register window Class MessageBox (null,_t ("Call to RegisterClassEx failed!"), _t ("Win32 application"), NULL); return 1;} HInst = hinstance; HWND hwnd = CreateWindow (Szwindowclass,sztitle,ws_overlappedwindow,200,100,width, Height,null,null,hinstance,null) ;//Create window if (!hwnd) {//If Create failed MessageBox (null,_t ("Call to CreateWindow failed!"), _t ("Win32 application"), NULL); return 1;} ShowWindow (hwnd,ncmdshow);//Display UpdateWindow (HWND);//update msg Msg;while again before display (GetMessage (&msg, NULL, 0, 0)) {// Gets the message in the message Queue TranslateMessage (&msg);D ispatchmessage (&msg);} return (int) Msg.wparam;} LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM WPARAM, LPARAM LPARAM) {paintstruct PS HDC hdc;switch (message) {case wm_paint://Redraw hdc = BeginPaint (hWnd, &ps);d isplay (HDC); EndPaint (HWnd, &ps); ReleaseDC (HWND,HDC); Break;case wm_char://response button switch (wParam) {case 27://escpostquitmessage (0); return 0;case wm_destroy:postquitmessage (0); Break;case wm_close:postquitmessage (0); return 0;default:return DefWindowProc (hWnd, message, WParam, LParam); return 0;} void display (HDC hdc) {polygon_points (); Srand ((unsigned) time (NULL));p Olygon (hdc, &AMP;POINTS_SET,RGB (255,0,0), 3); Ellipse (hdc, Max, Max, Max, Max, RGB (0, 255, 0), 3), Rect (hdc, n, Z, 550, RGB (0, 0, 255), 3); for (;;) {int rgb_a = rand ()% 256;int rgb_b = rand ()% 256;int Rgb_c = rand ()% 256; Scanlinefill (hdc, +,/*bkg_clr*/getpixel, HDC, +, (), RGB (Rgb_a, Rgb_b, Rgb_c)); Scanlinefill (hdc, WIDTH/2 +, HEIGHT/2 + ten,/*bkg_clr*/getpixel (hdc, WIDTH/2 + ten, HEIGHT/2 +), RGB (Rgb_b, Rgb_c, rgb_a)); Scanlinefill (hdc, RGB_A, 400,/*bkg_clr*/getpixel (HDC, n, N), RGB (Rgb_c, Rgb_b, Messa));Gebox (0, _t ("Continue"), _t ("Warning"), Mb_yesno | mb_iconquestion) = = Idyes) continue;elsebreak;}} void Line (HDC hdc, int x_beg, int y_beg, int x_end, int y_end, COLORREF color,int line_width, int line_style) {Hpen pen_o Ld;pen_old= (Hpen) SelectObject (hdc, CreatePen (Line_style,line_width,color));//Select Brush Movetoex (hdc, X_beg, Y_beg, NULL) ; LineTo (HDC, X_end, y_end); SelectObject (HDC, pen_old);} void Ellipse (hdc hdc, int x_left, int y_top, int x_right, int y_bottom, COLORREF color, int line_width, int line_style) {H PEN pen_old;pen_old = (hpen) SelectObject (hdc, CreatePen (Line_style, line_width, color));//Select Brush SelectObject (HDC, Getstockobject (Null_brush)); Ellipse (HDC, X_left, Y_top, X_right, Y_bottom); SelectObject (HDC, pen_old);}  void rect (hdc hdc, int x_left, int y_top, int x_right, int y_bottom, COLORREF color, int line_width, int line_style) {Hpen Pen_old;pen_old = (hpen) SelectObject (hdc, CreatePen (Line_style, line_width, color));//Select Brush SelectObject (HDC, Getstockobject (Null_brush)); Rectangle (HDC, X_left, Y_top, X_right, Y_bottom); SelectObject (HDC, pen_old);} void Polygon_points () {Point A (20+WIDTH/2, 150+HEIGHT/2); Point B (+ WIDTH/2, -130 + HEIGHT/2); Point C ( -20 + WIDTH/2, + HEIGHT/2); Point D ( -120 + WIDTH/2, -55 + HEIGHT/2); Point E ( -20 + WIDTH/2, + HEIGHT/2); Point F ( -80 + WIDTH/2, + height/2);p oints_set.push_back (A);p oints_set.push_back (B);p oints_set.push_back (C);p oints _set.push_back (D);p oints_set.push_back (E);p oints_set.push_back (F); void Polygon (HDC hdc,vector<point>* set, colorref color, int line_width, int line_style) {for (Auto PR = Set->beg In () +1; PR! = set->end (); ++PR) {Auto PL = pr-1;line (HDC, Pl->x, Pl->y, Pr->x, Pr->y, color,line_width);} Line (HDC, (Set->end ()-1)->x, (Set->end ()-1)->y, Set->begin ()->x, Set->begin ()->y, color, Line_width);} void Setstackempty (Pnode L) {//stack empty l->next = null;} BOOL Isstackempty (Pnode L) {//If the stack is empty if (L->next = = NULL) return True;elsereturn FALSE;} void StAckpush (Pnode L, point e) {//stack Pnode temp = new Node;pnode pt = L;while (pt->next) pt = pt->next;temp->data.x = e. X;TEMP-&GT;DATA.Y = E.y;pt->next = temp;} Point Stackpop (Pnode L) {//out of Stack point Temp;pnode pt = l;while (pt->next) pt = pt->next;temp.x = PT-&GT;DATA.X;TEMP.Y = P T->data.y;pt = L;while (pt->next->next) pt = Pt->next;pt->next = Null;return temp;} void Scanlinefill (HDC hdc,int x, int y, colorref oldcolor, colorref newcolor) {int xl, XR, I;bool Scanneedfill; Point pt; Setstackempty (&stack);p t.x = X;pt.y = y; Stackpush (&stack, PT); while (!isstackempty (&stack)) {pt = Stackpop (&stack); y = Pt.y;x = Pt.x;while (GetPixel (hdc, x, y) = = Oldcolor) {//Right-fill setpixel (hdc, x, y, Newcolor); XR = X-1;x = Pt.x-1;while (GetPixel (hdc, x, y) = = Oldcolor) {//left padding SetPixel (hdc, x, y, newcolor); x--;} XL = x + 1;//processing above a scan line x = Xl;y = y + 1;while (x < XR) {Scanneedfill = False;while (HDC, x, y) = = GetPixel) {SC Anneedfill = true;x++;} if (SCANNEEDFIll) {pt.x = X-1;pt.y = y; Stackpush (&stack, pt); scanneedfill = FALSE;} while (GetPixel (HDC, x, y)! = oldcolor&&x < XR) x + +;} Process the following scan line x = Xl;y = y-2;while (x < XR) {Scanneedfill = False;while (HDC, x, y) = = GetPixel) {Oldcolor = true;x++;} if (scanneedfill) {pt.x = X-1;pt.y = y; Stackpush (&stack, pt); scanneedfill = FALSE;} while (GetPixel (HDC, x, y) = oldcolor&&x < XR) x + +;}}}

　　

Computer graphics-code_2