# 1.3 Game 2302-0110: updating the game math library for graphics  (Page 2/20)

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## General background information

So far, we have been dealing with column matrices, points, vectors, and lines. (We will get to other topics in future modules.)

What is a point?

According to Kjell, a point is simply a location in space. It has no width, depth, or height. Therefore, it cannot be seen by the human eye,which means that we can't draw a point on the computer screen. However, it is possible to draw an object on the computer screen that indicates the locationof the point.

What do I mean by this?

Suppose you go out onto your driveway and establish that one corner of the driveway represents the origin in a rectangular Cartesian coordinate framework. Then you usemeasuring devices to identify a specific location on the driveway. You can point to that location with your finger, and others can see your finger, butthey can't see the point. Once again, the point has no width, height, or depth, and therefore cannot be seen by the human eye.

Mark the point

What you can do, however, is to take a piece of chalk and draw a small circle around your finger. Then others can see the mark that you have drawn as anestimate of the location of the point. It is very important however to remember that the chalk mark is not the point. It is simply a visualobject that indicates the location of the point to some degree of accuracy. The actual location of the point is a piece of underlying data . The chalk mark is a graphic object that you have invented to represent thatunderlying data in a visual way to a human observer.

Program output

Both of the sample programs that I will explain in this module will produce the same graphic screen output, which is shown in Figure 1 .

Figure 1 Screen output from both sample programs.

The left image in Figure 1 contains seven small circles. Each of those seven circles marks the location of a point in the 2D space of the image.However, those circles are not the points. The seven points consist solely of coordinate values and are not visible to the human eye. The sevencircles are graphics objects that were placed there to mark the locations in space of the seven points. The points existed in the 2D space before thegraphics objects were created, and would have existed even if I had not caused the circles to be drawn to mark the locations of the points.

What is a line segment?

This can be even more confusing. Kjell tells us that a line segment is the straight path between two points, and that it has no thickness. Sinceit has no thickness, a line cannot be seen by the human eye.

The left image in Figure 1 contains six graphic objects that we are likely to call lines or line segments. True enough, those graphic objects markthe path taken by the lines that represent straight paths between the pairs of points whose locations are indicated by the circles. However,those graphic objects are not lines in the context of this discussion. Rather, they are simply graphic objects that were used to mark the paths ofthe lines in a visual way for the benefit of a human observer.

where we get a research paper on Nano chemistry....?
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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