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1.It drift away from the actual line path because of rounding off float values to integer
2.It causes jaggies or stair-step effect
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Disadvantage:The accumulation of round of error is successive addition of the floating point increments is used to find the pixel position but it take lot of time to compute the pixel position.----------------------------------------------------------------------------------------------------------------
More Informationhttp://knol.Google.com/k/thiyagaraaj-m/dda-line-algorithm/1lfp8o9xxpx13/78#http://i.thiyagaraaj.com/articles/articles/dda-line-algorithm
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the standard version of dda given as in one of its steps as
if(abs(dx)>abs(dy)) steps=abs(dx);
else steps=abs(dy);
this part just supports the positive slop with starting point on left side. Take an example of any other end points as {(8,3) to (2,2) or (4,5) to ( 8,2) or (8,3) to (5,5) } where the slop needs to be negative( for the last two cases) only.
can anyone correct me by suggesting the accurate version of DDA? Or is this the actual DDA??.
Wiki User
∙ 14y ago
Wiki User
∙ 12y ago1. Division logic is needed which switches it towards hardware logic.
2. Floor integer values are used in place of normal integer values which may different result.
3. Floating point arithmetic is needed thus it is line consuming
Wiki User
∙ 10y agoyes
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Which modifications are necessary to generate dda dotted line code from dda algorithm?
What is the advantage of bresenham algorithm over dda algorithm?Read more: What_is_the_advantage_of_bresenham_algorithm_over_dda_algorithm
Difference between simple and symmetrical dda line drawing algorithm?
"Simple DDA" does not require special skills for implementation.
What are the differences between Bresenham's line algorithm and Bresenham's circle algorithm?
These two algorithms are almost completely different. The only real similarity is that they are each designed to use only integer addition/subtraction and multiplication, avoiding expensive division and floating point operations.
What are the advantages of bresenhams's line drawing algorithm over the cartesian slope ana ddadigitial defrantial analyser?
DDA uses float numbers and uses operators such as division and multiplication in its calculation. Bresgenham's algorithm uses ints and only uses addition and subtraction. Due to the use of only addition subtraction and bit shifting (multiplication and division use more resources and processor power) bresenhams algorithm is faster than DDA in producing the line. Im not sure, though if i remember right, they still produce the same line in the end. One note concerning efficiency: Fixed point DDA algorithms are generally superior to Bresenhams algorithm on modern computers. The reason is that Bresenhams algorithm uses a conditional branch in the loop, and this results in frequent branch mispredictions in the CPU. Fixed point DDA also has fewer instructions in the loop body (one bit shift, one increment and one addition to be exact. In addition to the loop instructions and the actual plotting). As CPU pipelines become deeper, mispredictions penalties will become more severe. Since DDA uses rounding off of the pixel position obtained by multiplication or division, causes an accumulation of error in the proceeding pixels whereas in Bresenhams line algorithm the new pixel is calculated with a small unit change in one direction and checking of nearest pixel with the decision variable satisfying the line equation.
Advantages of DDA line drawing algorithm?
DDA Line Drawing AlgorithmStep 1:[Determine The Dx & Dy]Dx=Xb-XaDy=Yb-YaStep 2:[Determine Slope is Gentle or Sharp]If |Dx|>|Dy| thenGentle SlopeM=Dy/DxSet The Starting PointIf Dx>0 ThenC=CELING(Xb)D=Yb+M*(C-Xb)F=FLOOR(Xa)R=FLOOR(D+0.5)H=R-D+MIF M>0 ThenPositive Gentle SlopeM1=M-1Now Step Through The ColumnsWHILE Cabs(dy)) steps=abs(dx);else steps=abs(dy);xincrement=dx/(float)steps;yincrement=dy/(float)steps;putpixel(round(x),round(y),2)for(k=0;k
Which modifications are necessary to generate dda dotted line code from dda algorithm?
What is the advantage of bresenham algorithm over dda algorithm?Read more: What_is_the_advantage_of_bresenham_algorithm_over_dda_algorithm
Which line drawing algorithm is better dda or bresenhams?
Bresenhams' algorithm is better
Difference between simple and symmetrical dda line drawing algorithm?
"Simple DDA" does not require special skills for implementation.
What are the differences between Bresenham's line algorithm and Bresenham's circle algorithm?
These two algorithms are almost completely different. The only real similarity is that they are each designed to use only integer addition/subtraction and multiplication, avoiding expensive division and floating point operations.
What are the advantages of bresenhams's line drawing algorithm over the cartesian slope ana ddadigitial defrantial analyser?
DDA uses float numbers and uses operators such as division and multiplication in its calculation. Bresgenham's algorithm uses ints and only uses addition and subtraction. Due to the use of only addition subtraction and bit shifting (multiplication and division use more resources and processor power) bresenhams algorithm is faster than DDA in producing the line. Im not sure, though if i remember right, they still produce the same line in the end. One note concerning efficiency: Fixed point DDA algorithms are generally superior to Bresenhams algorithm on modern computers. The reason is that Bresenhams algorithm uses a conditional branch in the loop, and this results in frequent branch mispredictions in the CPU. Fixed point DDA also has fewer instructions in the loop body (one bit shift, one increment and one addition to be exact. In addition to the loop instructions and the actual plotting). As CPU pipelines become deeper, mispredictions penalties will become more severe. Since DDA uses rounding off of the pixel position obtained by multiplication or division, causes an accumulation of error in the proceeding pixels whereas in Bresenhams line algorithm the new pixel is calculated with a small unit change in one direction and checking of nearest pixel with the decision variable satisfying the line equation.
DDA line algorithm to be executed in C?
C Programming Coding For DDA Algorithmvoid linedda(int xa,int ya,int xb,int yb) {int dx=xb-xa,dy=yb-ya,steps,k;float xincrement,yincrement,x=xa,y=ya;if(abs(dx)>abs(dy)) steps=abs(dx);else steps=abs(dy);xincrement=dx/(float)steps;yincrement=dy/(float)steps;putpixel(round(x),round(y),2)for(k=0;k
Who is responsible for maximizing the benefical use of excess obsolete and unserviceable military munitions and minimizing WMM generation?
dda's
Differences between digital differential analyzer and bresenham algorithm?
AnswerDDA uses float numbers and uses operators such as division and multiplication in its calculation. Bresenhams algorithm uses ints and only uses addition and subtraction. Due to the use of only addition subtraction and bit shifting (multiplication and division use more resources and processor power) bresenhams algorithm is faster than DDA in producing the line. Im not sure, though if i remember right, they still produce the same line in the end.One note concerning efficiency: Fixed point DDA algorithms are generally superior to Bresenhams algorithm on modern computers. The reason is that Bresenhams algorithm uses a conditional branch in the loop, and this results in frequent branch mispredictions in the CPU. Fixed point DDA also has fewer instructions in the loop body (one bit shift, one increment and one addition to be exact. In addition to the loop instructions and the actual plotting). As CPU pipelines become deeper, mispredictions penalties will become more severe.Since DDA uses rounding off of the pixel position obtained by multiplication or division, causes an accumulation of error in the proceeding pixels whereas in Bresenhams line algorithm the new pixel is calculated with a small unit change in one direction and checking of nearest pixel with the decision variable satisfying the line equation.BUT this error can be calculated and will not cause problems for typical line drawing applications. Lines longer than what fits on a typical computer screen (a few thousand pixels) will be identical to Bresenham lines when using 32 bit integers. Fixed point DDA also has another advantage: Since it does not require conditional jumps, you can compute several lines in parallel with SIMD (Single Instruction Multiple Data) techniques.
Advantages of DDA line drawing algorithm?
DDA Line Drawing AlgorithmStep 1:[Determine The Dx & Dy]Dx=Xb-XaDy=Yb-YaStep 2:[Determine Slope is Gentle or Sharp]If |Dx|>|Dy| thenGentle SlopeM=Dy/DxSet The Starting PointIf Dx>0 ThenC=CELING(Xb)D=Yb+M*(C-Xb)F=FLOOR(Xa)R=FLOOR(D+0.5)H=R-D+MIF M>0 ThenPositive Gentle SlopeM1=M-1Now Step Through The ColumnsWHILE Cabs(dy)) steps=abs(dx);else steps=abs(dy);xincrement=dx/(float)steps;yincrement=dy/(float)steps;putpixel(round(x),round(y),2)for(k=0;k
What is simple dda?
DDA stands for Digital Differential Analyzer. With that in mind, simple DDA just means that it is simplified.
Give 10 difference between dda and bresenham algorithm?
My answer is to atlas be under nine or 4"9" but if you are under nine without a booster seat you will be fined at least $25 or $75 each.
How do you find your dda number?
were is the dda number on a check
