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Shading - Polygon Rendering and Ray Tracing Methods
When one thing is under the exposure of light, so the rays of light are distributed over the surface and there the distribution of intensity pattern depends extremely on the shape of that thing. Here to represent that 3D scene on computer we want to do rendering, that is transforming the 3-D image into a 2-D image, and due to this rendering there is an option of loss of information like height, depth and so on, of an object in the scene. Therefore to preserve this takes different Illumination models into consideration, for saving the information embedded in 3-D scene and allow it not be lost whereas transforming it in to 2-D scene. Thus here we study in some detail the type of rendering techniques and shading.
What is scaling? The scaling transformations changes the shape of an object and can be carried out by multiplying every vertex (x,y) by scaling factor Sx, Sy where Sx is the
Morphing - Key Frame Systems Transformation of object shapes from one form to the other is termed as morphing as short form of metamorphism. This method can be applied to any o
What is persistence? The time it takes the emitted light from the screen to decompose one tenth of its original intensity is known as persistence.
Explain the merits and demerits of Penetration techniques. The merits and demerits of the Penetration techniques are as follows: It is an inexpensive method. It h
Differentiate between z-buffer method and scan-line method. What is the visibility test made in these methods? Solution : In depth buffer algorithm every pixel location on the
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Polygon representation methods - Boundary representations Boundary representations: now the 3-D object is shown as a set of surfaces which separate the object interior from
Principal vanishing point write respect to Z-axis Principal vanishing point w.r.t z-axis: By the 3rd row of matrix equation, we declare that the principal vanishing point w
Beam Penetration Method and Shadow Mask Method Two methods exist for displaying colors in a CRT monitor - beam penetration method and shadow mask method. Beam penetration metho
Linearly interpolate - Modeling and Rendering I 4 = I 1 + t (I 2 - I 1 ); here t = (|y 1 - y 2 |)/(|y 1 - y 2 |) I D = I A + t (I B - I A ); here t = (|AD|)/(|AB|)
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