A buffer method

1. What is a buffer method?
2. How is a buffer method different from Z buffer method?
3. What is Z buffer method in computer graphics?
4. What are the fields of each position in the A buffer?
5. What does a buffer consist of?
6. What are the advantages of a buffer over z-buffer?
7. How do you calculate z-buffer?
8. Which algorithm is required two different buffers?
9. Where is z-buffer algorithm used?
10. What do you mean by polygon clipping?
11. Why z-buffer is fast?
12. What is a depth buffer and what does it accumulate?
13. What is frame buffer memory?
14. What is the best fit definition for accumulation buffer?

What is a buffer method?

A-Buffer method in computer graphics is a general hidden face detection mechanism suited to medium scale virtual memory computers. This method is also known as anti-aliased or area-averaged or accumulation buffer.

How is a buffer method different from Z buffer method?

Z buffer and A buffer are two of the most popular visible surface detection techniques used in 3D computer graphics. ... Z buffer method computes the surface depth values for each pixel throughout the whole scene. A buffer method is an extension to Z buffer method, which adds transparency.

What is Z buffer method in computer graphics?

A depth buffer, also known as a z-buffer, is a type of data buffer used in computer graphics to represent depth information of objects in 3D space from a particular perspective. Depth buffers are an aid to rendering a scene to ensure that the correct polygons properly occlude other polygons.

What are the fields of each position in the A buffer?

Each position in the A-buffer has two fields: depth field- stores a positive or negative real number. intensity field- stores surface-intensity information or a pointer value.

What does a buffer consist of?

A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it.

What are the advantages of a buffer over z-buffer?

Here, the depth and opacity are implemented to determine the final color of the pixel. The other advantage of A buffer technique is that it provides anti-aliasing in addition to what Z-buffer performs.

How do you calculate z-buffer?

z' = (2^d -1 ) * ((far + near)/(2 * (far - near) + (1 / z) * (-far * near) / (far - near) + 1/2) when d is the depth of the z-buffer (24 bits at my case) and z is the z value of the vertex.

Which algorithm is required two different buffers?

It, however, trades off time for space complexity, requiring approximately twice the buffer space. Hence, it is called the Double Buffer algorithm.

Where is z-buffer algorithm used?

Z-buffer, which is also known as the Depth-buffer method is one of the commonly used method for hidden surface detection. It is an Image space method. Image space methods are based on the pixel to be drawn on 2D. For these methods, the running time complexity is the number of pixels times number of objects.

What do you mean by polygon clipping?

Polygon clipping is an important operation that computers,execute all the time. An algorithm that clips a polygon is rather complex. Each edge ofthe polygon must be tested against each edge of the clipping window, usually a rectangle. ... Multiple polygons may result from clipping a single polygon.

Why z-buffer is fast?

Z-buffer provides fast results even if the number of planes is large. Object comparison is not required in the z-buffer method. Non-polygonal hidden objects can also be detected using this method. No extra data-structure for storing and resolving is required.

What is a depth buffer and what does it accumulate?

Answer: A type of buffer that accumulates "depth" information in a 3D scene.

What is frame buffer memory?

A framebuffer (frame buffer, or sometimes framestore) is a portion of random-access memory (RAM) containing a bitmap that drives a video display. It is a memory buffer containing data representing all the pixels in a complete video frame. Modern video cards contain framebuffer circuitry in their cores.

What is the best fit definition for accumulation buffer?

Accumulation Buffer

It's typically used for accumulating a series of images into a final, composite image. With this method, you can perform operations like scene antialiasing by supersampling an image and then averaging the samples to produce the values that are finally painted into the pixels of the color buffers.