Question

What are basic line attributes in computer graphics?

Answer 1

Attributes: Line, Curve, Area Fill, Text. Basic attributes of a straight line segment are its type, its width, and its color.

A device context (DC) contains attributes that affect line and curve output. The line and curve attributes include the current position, brush style, brush color, pen style, pen color, transformation, and so on.May 30, 2018

Answer 2

Answer:

A straight line segment's basic characteristics are its type, width, and color. Lines can also be displayed using selected pen or brush options in some graphics program.

Explanation:

Line attributes in computer graphics are:

Line Type:

Type of Line: Solid lines, dashed lines, and dotted lines are the three line types. To generate such lines, we alter a line drawing algorithm by adjusting the length and spacing of displayed solid sections along the line path.

• An inter dash spacing equal to the length of the solid sections could be used to display a dashed line. The inter dash spacing and the length of the dashes are frequently specified as user options. To create a dotted line, create very short dashes with spacing equal to or greater than the dash size. Similar techniques are employed.
• A user calls the function to set line type attributes in a PHICS application program.

Line Width:

We use the command to set the line-width attribute:

• A positive number is assigned to the line-width parameter or. to indicate the relative width of the line to be displayed.

• A standard-width line is specified by a value of 1. On. We can draw thick lines with horizontal spans for lines with slope magnitude greater than 1, alternately picking up pixels to the right and left of the line path.

Line Color:

When a system offers color (or intensity) options, a parameter indicating the current setting is included.

• The color index is one of the system-attribute values. A polyline routine displays a line in the current color by using the setpixel procedure to set the current color value in the framebuffer at pixel locations along the line path.
• The number of color options is determined by the number of bits per pixel available in the frame buffer. In PHlCS, we use the function to set the line color value.
• Set the PolylineColourIndex property (le).

CURVE ATTRIBUTES:

Curve attributes have the same set of parameters as line segments. Curves can be displayed in a variety of colors, widths, dot dash patterns, and pen or brush options.