I've introduced a new category, GFX(Graphics) and Technical Drawing. It's an attempt to show and share with people, the information I've collected or received about technical aspect of drawings and paintings.
Posts of this category will contain stuff about Computer graphics, Technical drawing and it's implementation in games,physics stimulation, media entertainment and academics .
In this post, I'm going to introduce to you,one of the most beautiful and spectacular types of computer graphics,'Cel-Shading'.
Cell Shading) is a non-realistic rendering designed to make Computer graphics to be hand-drawn. Rendering is the process of producing virtual computer graphics which are used in gaming,entertainment industries or in stimulations.
The cel-shaded object appears to be an object in cartoons or in comics. By using Cel-Shading, we can draw lovely cartoons on our computer which were used to be hand-drawn before.
Now,Let's understand 'how a cell-shaded object differs from a real one'. But before that, I need you to recollect the paintings which you have drawn in Paint or PowerPoint etc.
Do you remember this window? Yup, It's a window from paint and is used to generate colours which are not available in the colour box. You can form the desired colour by dragging the mouse pointer over or you can enter the values for three fundamental colours,Red,Green and Blue to form a particular shade.Now observe the following drawing:
As you can see, I've drawn bands of various shades of a colour. The numbers indicate the amount of red color present in the shade.
When you see a real-life object you don't see a perticular colour but various shades of that colour.Just as the bands I've drawn above. See the car below:
Cel-shaders are different in nature. In cel-shaded animation, an intermediate colour from a group of close shades is selected and that is used to paint the object. Confused? Observe below...
The colour shade having RED=225 is selected from group 200-255. The colour shade having RED=175 is selected from group 150-200. These two shades are put side by side, eliminating all the other shades in between. See the cel-shaded car.
The bottom section of the car is darkish shade of green.However, the shade changes abruptly as we move from bottom to the top section and it becomes light green.
Property 1: In cel-shading all the shades of a particular colour which are very close to each other are represented by a single colour and used to paint the object. The selected shade is not changed unless and until there's a drastic change in the colour of the object. Drastic change refers to 1. Change of surface 2. Direction of light 3.Completely different colour(say one surface is Red and the other is Blue).
Ok,Let's move to the next point. Observe the following painting. It seems like an ancient tomb. Anyways, It's cel-shaded as you can clearly see. The point to be noted is, all the boundaries of each and every object in the painting are drawn, which you don't see in the real-life object.
Following images also illustrate the fact. ----------Compare--------------
Property 2: Thus, In a cell-shaded object all the boundaries are drawn very clearly.
Here are some more cell shaded objects:
The Grand Cannon-----Teapot
Due to the above properties and some other and it's beauty, Cel-shading is becoming very popular nowadays. It is a relatively recent addition to computer graphics, most commonly turning up in consolevideo games.
The recent Computer/Console games which have used cel-shaders are Prince of Persia 2008, No more heroes etc.
I hope, You would love this powerful and fabulous art of drawing.
Note:Though the end result of cel-shading has a very simplistic feel like that of hand-drawnanimation, the process is complex. Softwares like 3ds-max provide ready made cel-shaded textures. Soon, I'll be posting a tutorial on 'how to apply cel-shading to an object'.
Here's a video,I found on YouTube. Why did 'Quantum Mechanics' take birth when the world had the 'Classical Mechanics'? The following video gives the answer.
You see,the electrons are particles, however they behave like waves. These are some of the questions which the 'Classical mechanics' couldn't answer. So came the 'QUANTUM MECHANICS'.
Let me put some light on the history of Quantum mechanics.
Developmental milestones:
1. It started with Huygens' wave theory of light. Huygens was the one to propose that Light behaves like a wave. He tried to explain phenomenon of reflection,refraction with his theory, but couldn't give satisfactory explanations. We all know that, Light does not need any medium like air,water for it's propagation. It's due to this fact, we can receive sunlight even though there is void between the sun and the earth. However, Huygens assumed a invisible medium to be present everywhere,called as 'Luminiferous ether'. He said that this medium is essential for propagation of light. Many scientists tried to locate it, but their attempts were in vain.
2.Then came,one of the most famous men in the world, Isaac Newton. He proposed the 'corpuscular theory of light'. It said that, the light consists of small,little particles called 'corpuscles'. With this theory he could easily explain phenomenon of reflection. Somehow, he also managed to explain Refraction, the propagation of light through the lens etc.
3.In the early 1800, Young and Fresnel put forward their experiments to support the Huygens' wave theory of light. Young's double slit experiment was the first to discover that the light travels as transverse waves but not longitudinal waves. He observed that when the light is passed through two slits, a pattern containing alternate bright and dark bands is observed on the screen. This pattern is called as 'Interference pattern'.
4. In the late 1800, James Maxwell explained light as the propagation of electromagnetic waves using some mathematics. This theory was accepted widely.
5.In 1901, Max Plank proposed that light propagates as small packets of energy called as 'Quanta'. The theory was carried forward by the person of century, 'Albert Einstein'. However, Einstein preferred calling 'Quantum' as 'Photons'. He explained the phenomenon of photoelectric effect using theory of photons for which he received the 'noble prize' in physics in 1921. Who switches off the lamp posts on highways in the morning? Why can't a bugler break in a house so easily,nowadays? How do we measure intensity of light? It is all possible because of this one man and the photoelectric effect.
6.De Broglie's Hypothesis: Mr.De Broglie claimed that not just the light, but all matter behaves as a particle as well as waves.He called them 'matter waves'. He found a relationship between momentum of photon and the wavelength. This guy also was awarded a noble prize in physics in 1929.
So, "Is light a wave or a particle?” Perhaps it depends on the type of experiment you do,as you can see above.
-reference Wikipedia
Note: If you find any mistake in information or logic written above, Please let me know. Suggestions are welcome.
