There are two different kinds of lines.
- Straight line:
- Curved line:
- (i) Horizontal lines: The lines drawn horizontally are called horizontal lines.
- (ii) Vertical lines: The lines drawn vertically are called vertical lines.
Continuous thick Used for visible outlines and edges. Dashed thin line. Used for hidden outlines and edges. Chain thin.
Dimension lines are drawn using continuous thin (narrow) lines (straight or curved). The given type of line in question is used to represent cutting planes. Explanation: The other lines are continuous thin (narrow) (straight or curved) which areused for grid, dimension.
A line segment has two endpoints. It contains these endpoints and all the points of the line between them. You can measure the length of a segment, but not of a line. A ray is a part of a line that has one endpoint and goes on infinitely in only one direction. You cannot measure the length of a ray.
Types of Lines | Engineering Drawing - YouTube
Explanation: The digitization process is called scan conversion. 10. Which display devices allows us to walk around an object and view it from different sides. Explanation: 3D display devices allows user to view the object from different sides.
2. CONSTRUCTION LINE – Very light and thin line use to construct layout work.
In computer graphics, line clipping is the process of removing lines or portions of lines outside an area of interest. Typically, any line or part thereof which is outside of the viewing area is removed. There are two common algorithms for line clipping: Cohen–Sutherland and Liang–Barsky.
In computing, an attribute is a specification that defines a property of an object, element, or file. An attribute of an object usually consists of a name and a value; of an element, a type or class name; of a file, a name and extension.
A line connects two points. It is a basic element in graphics. To draw a line, you need two points between which you can draw a line.
Basic attributes of a straight line segment are its type, its width, and its color. In some graphics packages, lines can also be displayed using selected pen or brush options. line-type attribute - solid lines, dashed lines, and dotted lines.
Attribute (computing) In computing, an attribute is a specification that defines a property of an object, element, or file. It may also refer to or set the specific value for a given instance of such. For clarity, attributes should more correctly be considered metadata.
1. Which of the following is the basic attribute of a character? Explanation: Font, size, color and orientation are the basic attribute of a character. Explanation: Character attributes can be set to text as well as marker symbols defined as individual characters.
It's a fairly straightforward antialiasing algorithm to
draw lines of variable
thickness.
Some simple routes to use:
- for any width n where n is odd.
- for start point p(x,y) pick the points t0 and b such that they are centred on p but n pixels apart.
- for each point p on the line instead of drawing a point draw a circle.
The primary use of clipping in computer graphics is to remove objects, lines, or line segments that are outside the viewing pane.
Computer graphics are used to simplify this process. Various algorithms and techniques are used to generate graphics in computers. This tutorial will help you understand how all these are processed by the computer to give a rich visual experience to the user.
Digital differential analyzer (graphics algorithm) In computer graphics, a digital differential analyzer (DDA) is hardware or software used for interpolation of variables over an interval between start and end point. DDAs are used for rasterization of lines, triangles and polygons.
Current fill pattern and fill color is used to fill the area. (x, y) is any point on the screen if (x,y) lies inside the area then inside will be filled otherwise outside will be filled,border specifies the color of boundary of area. To change fill pattern and fill color use setfillstyle.
A translation process moves every point a constant distance in a specified direction. It can be described as a rigid motion. A translation can also be interpreted as the addition of a constant vector to every point, or as shifting the origin of the coordinate system.
Bresenham's Line Algorithm. This algorithm is used for scan converting a line. It was developed by Bresenham. It is an efficient method because it involves only integer addition, subtractions, and multiplication operations.
How many edges of the clipping are/is present in 2D? Explanation: If the algorithm is done in 2D, we have 4 edges of the clipping area. Left edge, right edge, top edge and bottom edge.
Step 1 − Get the coordinates of the center of the circle and radius, and store them in x, y, and R respectively. Set P=0 and Q=R. Step 2 − Set decision parameter D = 3 – 2R. Step 3 − Repeat through step-8 while P ≤ Q.
Sutherland, R. F. Sproull, and R. A. Schumacker, A characterization of ten hidden surface algorithms, ACM Computing Surveys 6 1 : 1 55, March 1974. Once we transform all the geometry into screen space, we need to decide which parts are visible to the viewer.
Pattern-fill the polygon is filled with an arbitrary predefined pattern. 6. Types of Polygons: Convex and Concave Convex Polygon - For any two points P1, P2 inside the polygon, all points on the line segment which connects P1 and P2 are inside the polygon. Concave Polygon - A polygon which is not convex.
Disadvantages of DDA Algorithm
Floating point arithmetic in DDA algorithm is still time-consuming. 2. The algorithm is orientation dependent. Hence end point accuracy is poor.An accurate and efficient raster line-generating algorithm, developed by Bresenham, scan converts lines using only incremental integer calculations that can be adapted to display circles and other curves. Pixel positions along a line path are then determined by sampling at x unit intervals.
5) Which of the following technique is used in Midpoint Subdivision algorithm ? Explanation: In mid point subdivision algorithm the line segment is separated at its mid point and them the two resulting segments are checked for visibility and clipping.
Explanation: Rotation is the rigid body transformation that moves object without deformation.
