Friday, January 22, 2010

Difference between Isometric, Oblique and Orthographic Drawing

Isometric drawing is a pictorial representation of an object in which all three dimensions are drawn at full scale rather than foreshortening them to the true projection. An isometric drawing looks like an isometric projection but all its lines are parallel to the three major axes.

Oblique drawings show a three dimensional view of an object. The width of the object will still be drawn as a horizontal line, but the depth can be drawn back at any angle. There are three types of obliques, cavalier, normal and cabinet obliques. Cabinet obliques are when you cut the depth in half. Cavalier obliques are when you keep the depth the full measurement. Normal obliques are when you cut the depth into three quarters.

Orthographic drawings show a three-dimensional object in two dimensions. It is a form of parallel projection, where the view direction is orthogonal to the projection plane resulting in every plane of the scene appearing in affine transformation on the viewing surface.

So the difference between these drawings is that isometric drawing is when all three dimensions of an object are drawn at full scale rather than foreshortening them to the true projection while in oblique drawings, the width of the object will still be drawn as a horizontal line, but the depth can be drawn back at any angle and orthographic drawings show a three-dimensional object in two dimensions.

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These drawings are isometric, oblique and orthogonal respectively.


Sources:

http://www.businessdictionary.com/definition/isometric-drawing.html

http://library.thinkquest.org/TQ0310106/oblique.html

http://en.wikipedia.org/wiki/Orthographic_projection

Saturday, January 16, 2010

Definition of theme - Environment

Definition of environment:
Environment can be defined as an area in which something exists or lives and the totality of surrounding conditions. It can also be defined as the sum of the elements, factors and conditions in the surroundings which may have an impact on the development, action or survival of an organism or group of organisms or the complex of physical, chemical, and biotic factors that act upon an organism or an ecological community and ultimately determine its form and survival.


Examples:
An unhappy home environment, may cause a child to do badly in school.
Because of global warming, we need to prevent further pollution of the environment.
How can you concentrate in such a noisy environment?

Summary:The environment is the sum of the elements, factors and conditions in the surroundings in which something exists and it can impact on the development, action or survival of an organism or an ecological community.

Sources:
http://www.medterms.com/script/main/art.asp?articlekey=19104
www.merriam-webster.com/dictionary/environment


Tuesday, January 12, 2010

ADMT Lesson 1: Personal Reflection

ADMT means how to design technology and how to market it to attract buyers. An ADMT student must have a positive attitude to be hardworking and not give up easily. My aspiration is to be good at designing and marketing products so I can set up a business to sell these products.I can achieve my aspiration by being attentive during ADMT lessons and to put what I have learnt to good use in the future.

Without ADMT, we would still be living in a life similar to that of early homosapiens.