13-Laboratoriya ishi. C ++ tilining grafik imkoniyatlari

Chiziq rangini tanlash - setcolor ( rang);
Rang va bo’yaladigan soha stilini tanlash - setfillstyle ( stili, rangi );

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  0 – shaffof;
  
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  1 – to’liq bo’yalgan;
  
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  3..6 - qiya chiziqli;
  
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  7..8 – setka;
  
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  9..11- nuqtali.
  

Nuqta hosil qilish - putpixel (x o’qi bo’yicha koordinata, y o’qi bo’yicha koordinata, rang);
Masalan: putpixel (150,120, 9);
To’g’ri chiziq hosil qilish - line (x1, y1, x2, y2); x1, y1- chiziq boshi koordinatasi; x2, y2 - chiziq oxiri koordinatasi.
Masalan: setcolor ( 10 );
line (120,100,220,100);
Siniq chiziqlar hosil qilish
setcolor ( 12 ); - chiziq rangi
moveto (x1, y1); - chiziq boshlanish koordinatasi lineto (x2, y2); - chiziq singan qismi koordinatasi lineto (x3, y3); - chiziq oxiri koordinatasi
to’rtburchak hosil qilish - rectangle (x1, y1, x2, y2); x1, y1- to’rtburchak diogonali boshi koordinatasi; x2, y2 - to’rtburchak diogonali oxiri koordinatasi.
Masalan: setcolor ( 10 ); rectangle (100, 100, 200, 200);
to’rtburchak soha hosil qilish
setfillstyle ( 1, 12 ); - stil va rangni tanlash
bar (x1, y1, x2, y2); - to’rtburchak soha chizish; x1, y1- to’rtburchak diogonali boshi koordinatasi; x2, y2 - to’rtburchak diogonali oxiri koordinatasi.
Aylana chizish - circle ( x, y, R ); x, y – aylana markazi koordinatasi, R – aylana radiusi.
Masalan:
setcolor ( LIGHTRED ); circle ( 120,130,50 ); Grafikda matn xosil qilish setcolor ( 9 );
outtextxy ( x, y, "Olim" );
x, y – matn hosil bo’ladigan koordinata.
Ranglar:


Namuna. Quyidagi y=2arctg(x)-x+3 funksiya grafigini x[-5;5] oraliqda n=0.0001 qadam bilan chizing. Uning C++ tilidagi dasturi quyidagicha.

#include #include #include #include int main() { float y,x; float z,w; initwindow(640,480); //Oyna o’lchami
moveto(320,0); //koordinata gorizontal o’qi boshi lineto(320,480); //koordinata gorizontal o’qi oxiri moveto(0,240); //koordinata vertikal o’qi boshi lineto(640,240); //koordinata vertikal o’qi oxiri z=320; w=240; for(x=-5;x<=5;x+=0.0001) { y=2*atan(x)-x+3; moveto(z,w); putpixel(320+x*50,240-y*50,14); z=320+x*50; w=240-y*50; } getch();closegraph(); }