Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Ellipse Generation Algorithm
You know that a circle is symmetric in all the octants, while ellipse is symmetric with respect to four quadrants. Therefore, to draw an ellipse, we need to determine approximating pixels in one quadrant. We proceed exactly the same way as we did in the case of a circle. Define a decision parameter and choose the next pixel position depending on the sign of the decision parameter. The decision parameter is defined in terms of the equation of an ellipse.
As in the case of a circle, let us assume that the ellipse is having centre at the origin. Consider its perimeter segment in the positive quadrant. Identify the point on the perimeter where the ellipse has tangent line with slope = -1. Then divide the positive quadrant in two regions- Region I where slope dy/dx > -1 and Region II where slope dy/dx < -1 . You may notice that for Region I, y values of points of the perimeter are decreasing slowly with respect to x values, than in Region II. This means for determining the approximating pixels, we have to do the following. For each increment in x value, y will either remain same or be decremented depending on the sign of a decision parameter. But in Region II, for each decremented y value, x will either be incremented or will remain the same (compare with two cases of Bresenham line drawing algorithm for slopes | m | < 1 and | m | > 1).
pagemaker is a image editor
Scenes - polygon rendering and ray tracing methods In the context of ray tracing, a scene is a set of objects and light sources which will be viewed through a camera. All of
side-effect of scan-conversion
what do you mean by retracing? Define horizontal as well as Vertical retracing?
I need different convincing virtual environments (2D and 3D) that alter size perception. In particular, for 2D environment or background, when any object is augmented with the 2D e
Windowing Transformations - Raster Graphics and Clipping From the above section of introduction, we understood the meaning of the viewport and term window that could again be
Geometric tables - Polygon Tables 1) Vertex table: Keep vertices' coordinates values in the object. 2) Edge table: Keep pointers back in to the vertex table for identif
What is translation? Translation is the process of changing the position of an object in a straight-line path from one coordinate location to another. Each point (x, y) in the
Magnify a triangle with vertices A = (1,1), B = (3,1) and C = (2,2) to twice its size in such a way that A remains in its original position. Answer: You need to apply scaling b
Define Octrees? Hierarchical tree structures called octrees, are used to show solid objects in some graphics systems. Medical imaging and other applications that needs display
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd