Active Edge Table

Ab chunki ho sakta hai ki ham eek se adhik point or ending p[oint prapt ho toh ham in intersection points ko jodo mei draw kar sakte hai.

Ek scan line dwara curerent intersion dwara cross ki gayi samasta edges ki suchi rakhti hai yah un edges ki ek suchi hai jo is scan in eke liye active hai or inhe x axes ke sath intersections ke badhte huyebkram mei surakshit kiya jata hai.

Is algoritham mei nimnlikhit baate dhyan rakhne yogye hai-

Jab ek scan line ek edge ko intersect karti hai toh ek integer coordinate y prapt hota hai.

Yadi yah point edge point ke end point ka hai toh is point ko gina jayega.

Yadi edge horizontal hai or scan line par hai toh is point ko nahi gina jayega.

Interstion process ke doran pratyek scan line ke sath active edge table ko update kiya jata hai taki scan line dwara intersect kiye ja sakne wale points ko surakshit kiya ja sakta hai.

Rando scan monitors

Random scan monitors ek chitre ko draw karte samaye ek samaye par ek line ko draw karte hai isey karan se inhe vector display bhi kaha jata hai in monitoirs ko strock writing athwa calligraphic display bhi kaha jata hai random scan system dwara chitre ki component lines ko ek specified order mei hi draw kiya jata hai chitre ko draw karne ke uprant system cycle wapas pehli line par aa jata hai or chitre ki sabhi lines ko ek second mei tees se saath baar draw karta rehta hai is prakar ke monitirs kevel line drawing appilications ke liye upyogi hote hai or ye vastvik images ko nahi darsha sakte hai.

Random scan system mei refresh rate display ki jane wali picture par nirbhar karta hai picture definition ko line drawing commands ki jane wali ke samuh ke roop mei memory ke ek bhag ke roop mei surakshit kiya jata hai jisey refresh display file kaha jata hai kabhi kabhi refersh display fle ko display list display program athwa refresh buffer bhi kaha jata hai ek p;icture ko pradarshit karne ke liye system display file bhi commands ke set ko cycle arthat punarvit karta hai or kramanusar pratyek component line ko draw karta hai.

Sabhi line drawing commands ko pricess karne ke pashchat system wapas mei suchi ki pehli line par aa jata hai random scan display ko ek picture ki prati second 30 se 60 baar component lines ko draw karne ke liye banaya jata hai.

Raster scan monitors

Yah television technology par aadharot graphics monitirs ka sabse aam prakar hai raster scan system mei ek electron beam screen par baye se dayi or swap hoti hai or ek line rwa karti hai or is prakar eke k line karke chitre ko upar se niche draw karti hai jese jese electron beam ek line mei move karti hai toh elemuntaed spaots ke pattern ko create karne ke liye beam intensity on or off hoti hai pratyek line ke antt mei beam intensity off ho jati hai or agli line ke liye elctron beam screen ke baye sire par aa jati hai isey prakar jab pura chitre draw ho jata hai toh electron beam screen ki pehli line ke liye screen ke baye sire par aa jati hai is prakar ke monitirs apeskhakrat mehngy hote hai or inka resolution bhi apekshakrat kam hota hai.

Raster scan system mei ek electron beam hota hai arthat electron ki ek kiranscreen par ek row arthat upar se niche swap karti hai jese jese electron beam pratyek row mei karye karti rehti hai.