simple line drawing algorithm
Slope m 6-0 4-0 64. Now for generating any line segment we need intermediate points and for calculating them we can use a basic algorithm called DDA Digital differential analyzer line generating algorithm.
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Basic Line Drawing Algorithm.
. Set R Round H Plot the point at RC on the screen. Let the two end points of a line be P1 x1 y1 and P2 x2 y2. IE a 45 degree line going up and to the right.
But it is less suited for hardware implementation. You can define a line by its two end points and by the line equation y mx c where m is called the slope and c the y intercept of the line. Calculate dx x 2-x 1.
Calculate dy y 2-y 1. Find the slope m. Xmax x2.
Line Generation Algorithm DDA Algorithm. It is more suitable for generating line using the software. As shown in the above figure let we have initial coordinates of a line xk yk The next coordinates of a line xk1 yk1 The intersection point between yk and yk1 y.
The Bresenham algorithm is another incremental scan conversion algorithm. Calculate dx dy dx X1 - X0. This works but its slow.
Set C Round xa Let F Round xb Let H ya. Given the starting and ending coordinates of a line DDA Algorithm attempts to generate the. For each x compute y according to our line equation and round to the nearest integer.
Declare x 1y 1x 2y 2dxdyxy as integer variables. There are three line drawing algorithms in computer graphics. DDA Algorithm is the simplest line drawing algorithm.
DDA Line Drawing Algorithm Part-2 httpsyoutubeua6lGnqtL0QMyself Shridhar Mankar a Engineer l YouTuber l Educational Blogger l Educator l Podcaster. Else xmin x2. Use Bresenhams algorithm on y1 x1 to y2 x2.
Assume that the slope is greater than 1. The line equation describes the coordinates of all. Draw a line from x1 y1 to x2 y2.
Let we assume that the distance between y and yk d1. Increment C C1 If C. Dy Y1 - Y0.
In Bresenhams Line Drawing algorithm we have to calculate the slope m between the starting point and the ending point. DDAs are used for rasterization of lines triangles and polygons. Xmax x1.
In computer graphics a digital differential analyzer DDA is hardware or software used for interpolation of variables over an interval between start and end point. M 6-0 4-0 64 which is more than 1. Float xmin xmax.
Consider one point of the line as X0 Y0 and the second point of the line as X1 Y1. Calculate the pixels of the line as previously. Let R represent the row and C the column.
DDA algorithm Digital Differential Analyzer Midpoint algorithm. Towards a Line Drawing Algorithm For now well deal with the simple case where x0 x1 y0 y1 0. Draw a line using DDA Algorithm from 00 to 46 This case is for slope m greater than 1.
If ABS dx ABS dy Then step abs dx. Enter value of x 1y 1x 2y 2. Set xmin to the lower x value given and xmax to the higher value if x1 x2 xmin x1.
As m 64 is greater than 1 therefore y is increased and x is calculated. To draw the line in terms of the x dimension we must first figure out the minimum and maximum x values that were passed to the function since x2 may be lower than x1 and vice versa. Digital Differential Analyzer D D A algorithm is the simple line generation algorithm which is explained.
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