Those functions in a graphics package that we use to describe the various picture components are called the graphics output primitives, or simply primitives. The output primitives describing the geometry of objects are typically referred to as geometric primitives. Point positions and straight-line segments are the simplest geometric primitives. Additional geometric primitives that can be available in a graphics package includec circles and other conic sections, quadric surfaces, spline curves and surfaces, and polygon color areas. And most graphics systems provide some functions for dis-playing character strings.After the geometry of a picture has been specified within a selected coordinate reference frame, the output primitives are projected to a two-dimensional plane, corresponding to the display area of an output device, and scan converted into integer pixel positions within the frame buffer.In this chapter, we introduce the output primitives available in OpenGL, and we also discuss the device-level algorithms for implementing the primitives. Exploring the implementation algorithms for a graphics library will give us valuablei insight into the capabilities of these packages. It will also provide us with an understanding of how the functions work, perhaps how they couldbe improved, and

The Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line. However different Graphic packages offers different output primitives like a rectangle, conic section, circle, spline curve or may be a surface. Once it is specified what picture is to be displayed, various locations are converted into integer pixel positions within the frame buffer and various functions are used to generate the picture on the two dimensional co ordinate system of output display.

Output Premitives:

Basic geometric structures used to describe scenes.

(Points, straight line, segment, circles and other conic sections,quadric surfaces, polygon color areas,and character strings) these picture components are often defined in a continuous space

The basic elements constituting a graphic are called output primitives. GRPH1 has the following output primitives.

• Polyline
• Polymarker
• Text
• Tone

• Line:
• Arrow

Five of these six primitives (excluding the tone primitive) all consist of line segments. Line segments have two attributes: the line index and line type. A tone has the attribute of tone pattern index. These attributes are defined as follows.
Coordinates handled by GRPH1 include curvilinear coordinates, so it is not appropriate in some cases to connect coordinates specifying line segments and boundaries of tone patterns with straight lines. Therefore, a function is available that interpolates between the coordinates by dividing the space between the coordinates into several sections. Furthermore, all primitives are subject to clipping at a certain boundary.

1.     A picture can be described in several ways. In raster display, a picture is completely specified by the set of intensities for the pixel positions in the display. At the other extreme, we can describe a picture as a set of complex objects, such as trees and terrain or furniture and walls, positioned at specified coordinate locations within the scene.

2.     Shapes and colors of the objects can be described internally with pixel arrays or with sets of basic geometric structures, such as straight line segments and polygon color areas. The scene is then displayed either by loading the pixel arrays into the frame buffer or by scan converting the basic geometric-structure specifications into pixel patterns.

A picture can be described in several ways. In raster display, a picture is completely specified by the set of intensities for the pixel positions in the display. At the other extreme, we can describe a picture as a set of complex objects, such as trees and terrain or furniture and walls, positioned at specified coordinate locations within the scene.

Shapes and colors of the objects can be described internally with pixel arrays or with sets of basic geometric structures, such as straight line segments and polygon color areas. The scene is then displayed either by loading the pixel arrays into the frame buffer or by scan converting the basic geometric-structure specifications into pixel patterns.

Description of pictures.

Specified by a set of intensities for the pixel positions.

Describe it as a set of complex objects, such as trees, furniture and walls, positioned at specific coordinate locations within the scene.

Graphics programming packages provide functions to describe a scene in terms of basic geometric structures referred to as output primitives.

Points

Lines

Circles

Polygon

Essential geometric structures used to depict scenes. 

• focuses, straight line portion, circles and other conic segments, quadric surfaces, spline bend and surfaces, polygon shading regions, and character strings
• These image segments are frequently characterized in a continuous space.

 Output Primitives:  Output Primitives is a picture can be described in several ways. In raster display, a the picture is completely specified by the set of intensities for the pixel positions in the display. At the other extreme, we can describe a picture as a set of complex objects, such as trees and terrain or furniture and walls, positioned at specified coordinate locations within the scene.

Shapes and colors of the objects can be described internally with pixel arrays or with sets of basic geometric structures, such as straight line segments and polygon color areas. The scene is then displayed either by loading the pixel arrays into the frame buffer or by scan converting the basic geometric-structure specifications into pixel patterns.

Those functions in a graphics package that we use to describe the various picture components are called the graphics output primitivesPoint positions and straight-line segments are the simplest geometric primitives.

Point positions and straight-line segments are the simplest geometric primitives.

The primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line.  A picture can be described in several ways. In raster display, a picture is completely specified by the set of intensities for the pixel positions in the display. At the other extreme, we can describe a picture as a set of complex objects, such as trees and terrain or furniture and walls, positioned at specified coordinate locations within the scene.

The most basic components of Computer Graphics that are called Graphics Output Primitive or simply primitive. The Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User.

Most basic Output primitives are : 1. Point-Position

                                                             2. Straight line

Some different output primitives are:

1. Rectangle.

2. Conic

3. Circle

4. Curve etc.

Graphic SW and HW provide subroutines to describe a scene in terms of basic geometric structures called output primitives.

● Output primitives are combined to form complex structures

● Simplest primitives

– Point (pixel)

– Line segment

The Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line.

The basic elements constituting a graphic are called output primitives. GRPH1 has the following output primitives.

• Polyline
• Polymarker
• Text
• Tone

• Line:
• Arrow

Five of these six primitives (excluding the tone primitive) all consist of line segments. Line segments have two attributes: the line index and line type. A tone has the attribute of tone pattern index. These attributes are defined as follows.
Coordinates handled by GRPH1 include curvilinear coordinates, so it is not appropriate in some cases to connect coordinates specifying line segments and boundaries of tone patterns with straight lines. Therefore, a function is available that interpolates between the coordinates by dividing the space between the coordinates into several sections. 

The Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line.

Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line. Primitives are basic elements, such as lines, curves, and polygons, which you can combine to create more complex graphical images. In programming, primitives are the basic operations supported by the programming language.

The Primitives are the straightforward geometric functions that are wont to generate varied computer graphics required by the User. Some most simple Output primitives are point-position(pixel) and a straight line.

Essential geometric structures used to depict scenes. 

These image segments are frequently characterized in a continuous space. Focuses, straight line portion, circles and other conic segments, quadric surfaces, spline bend and surfaces, polygon shading regions, and character strings

Essential geometric structures used to depict scenes. 

These image segments are frequently characterized in a continuous space. Focuses, straight line portion, circles and other conic segments, quadric surfaces, spline bend and surfaces, polygon shading regions, and character strings

The basic elements constituting a graphic are called output primitives. GRPH1 has the following output primitives.

• Polyline
• Polymarker
• Text
• Tone

• Line:
• Arrow

Five of these six primitives (excluding the tone primitive) all consist of line segments. Line segments have two attributes: the line index and line type. A tone has the attribute of tone pattern index. These attributes are defined as follows.

Coordinates handled by GRPH1 include curvilinear coordinates, so it is not appropriate in some cases to connect coordinates specifying line segments and boundaries of tone patterns with straight lines. Therefore, a function is available that interpolates between the coordinates by dividing the space between the coordinates into several sections. Furthermore, all primitives are subject to clipping at a certain boundary.

The basic elements constituting a graphic are called output primitives. GRPH1 has the following output primitives.

• Polyline
• Polymarker
• Text
• Tone

• Line:
• Arrow

Five of these six primitives (excluding the tone primitive) all consist of line segments. Line segments have two attributes: the line index and line type. A tone has the attribute of tone pattern index. These attributes are defined as follows.
Coordinates handled by GRPH1 include curvilinear coordinates, so it is not appropriate in some cases to connect coordinates specifying line segments and boundaries of tone patterns with straight lines. Therefore, a function is available that interpolates between the coordinates by dividing the space between the coordinates into several sections. Furthermore, all primitives are subject to clipping at a certain boundary.

The Primitives are the simple geometric functions that are used to generate various Computer Graphics required by the User. Some most basic Output primitives are point-position(pixel), and a straight line.