What is hidden line surface elimination?
The problem of hidden line and surface elimination is also known as visible surface elimination. It was solved by. application of different hidden surface algorithms. These algorithms determine the lines or edges, vertices, surfaces or. volumes which are visible or invisible to the observer at specified point.
What is hidden line elimination in computer graphics?
Computer programs for line drawings of opaque objects must be able to decide which edges or which parts of the edges are hidden by an object itself or by other objects, so that those edges can be clipped during rendering. This problem is known as hidden-line removal.
Which of this is hidden-line removal method?
Algorithms used for hidden line surface detection
- Back Face Removal Algorithm.
- Z-Buffer Algorithm.
- Painter Algorithm.
- Scan Line Algorithm.
- Subdivision Algorithm.
- Floating horizon Algorithm.
What is the importance of hidden surface removal?
Hidden surface determination is necessary to render an image correctly, so that one may not view features hidden behind the model itself, allowing only the naturally viewable portion of the graphic to be visible.
Why is removal of hidden lines important?
Hidden line removal is utilized by a CAD to display the visual lines. It is considered that information openly exists to define a 2D wireframe model as well as the 3D topological information. Typically, the best algorithm is required for viewing this information from an available part representation.
How many types of hidden surface algorithm are?
We have discussed five different hidden surface algorithms: z-buffer, scan line, ray casting, depth sort, and bsp-tree. Two key ideas are applied to help increase the speed of these algorithms: sorting of edges by depth, and pixel coherence for depth and intensity.
Why we need removal of hidden surfaces?
All the hidden surface algorithms employe image space approach except?
…
| Q. | Why we need removal of hidden surface |
|---|---|
| B. | for determining the closest visible surface |
| C. | Both a & b |
| D. | None of these |
| Answer» c. Both a & b |
Which algorithm is used for hidden surface are?
What is hidden surface & line?
Hidden Surface Removal. – Viewing – Looking along any projector (from center of projection, for example) we see one or more surfaces. Hidden Line – when outline of an object is to be displayed – similar to clipping a line segment against a window – most surface algorithms can be applied for hidden line elimination.
Which is line drawing algorithm?
In computer graphics, a line drawing algorithm is an algorithm for approximating a line segment on discrete graphical media, such as pixel-based displays and printers. On such media, line drawing requires an approximation (in nontrivial cases). Basic algorithms rasterize lines in one color.
What do you mean by hidden surface problem?
When we view a picture containing non-transparent objects and surfaces, then we cannot see those objects from view which are behind from objects closer to eye. We must remove these hidden surfaces to get a realistic screen image. The identification and removal of these surfaces is called Hidden-surface problem.
How many types of hidden surface removal algorithms are there?
We have discussed five different hidden surface algorithms: z-buffer, scan line, ray casting, depth sort, and bsp-tree.
What are the different types of line algorithms?
Types of Line Drawing Algorithm
- Digital Differential Algorithm ( DDA) An incremental conversion method is a DDA Algorithm and also we called Digital Differential Algorithm (DDA).
- The Bresenham Line Algorithm. The Scan conversion algorithm is Bresenham-algorithm.
How many types of line algorithms are there?
There are following algorithms used for drawing a line: DDA (Digital Differential Analyzer) Line Drawing Algorithm. Bresenham’s Line Drawing Algorithm. Mid-Point Line Drawing Algorithm.
What do you mean by line algorithm?
What are the properties of line drawing algorithm?
Properties of Good Line Drawing Algorithm:
- Line should appear Straight: We must appropriate the line by choosing addressable points close to it.
- Lines should terminate accurately: Unless lines are plotted accurately, they may terminate at the wrong place.
What are the types of line drawing algorithm?
Why line drawing algorithm is used?