Note that there are two parts of the memory: front buffer(currently on display) and back buffer(will be display when the buffer swaps). Whatever written to the framebuffer will show up on the screen, usually 24 times a second to achieve smooth animation.

When we mention framebuffer, usually, we're referring to a graphic's cards memory (RAM). The frame buffer is graphics memory that stores the result of rendering operations. They are the ones that will be displayed on the screen. Only the fragments passed all the tests (per fragment operation) will survive, and be qualified for pixels. Also, the color data of the fragment may be changed by some blending (alpha-test). To become a real pixel, it has to pass depth test.

So, for our example: v = /* v is the *VALUE* of the ith object i.e.A fragment is just a candidate to become a pixel but not yet.Īfter rasterization of points, lines, bitmaps (per vertex operation), we end up with some pixel-like data. Finally add as much as you can of the next object. Then you take the objects with the highest ratios and add them until you can’t add the next object as whole. The idea is to calculate for each object the ratio of value/cost, and sort them according to this ratio. In fact, it’s one of the classic examples. You’ve got the fractional knapsack problem when you can take fractions (as opposed to all or nothing) of the objects. You’re usually dealling with a knapsack problem when you’re give the cost and the benefits of certain objects and asked to obtain the maximum benefit so that the sum of the costs is smaller than a given value. Ted should take piles 2, 3, 4 and 5 completely and about 58% of pile 1. Given n, v, c and W, calculate which piles Ted should completely put into his knapsack and which he should put only a fraction of. Ted has a knapsack that can only hold W kilograms. Because the each pile has a different purity, each pile also has a different value ( v) and a different weight ( c). Ted Thief has just broken into the Fort Knox! He sees himself in a room with n piles of gold dust. The Fractional Knapsack Problem usually sounds like this: In this article, I describe the greedy algorithm for solving the Fractional Knapsack Problem and give an implementation in C.

Knapsack problem using opengl