interpolation for PTP axes is extremely simple, and involves only providing the DDA is essentially an algorithm for digital integration and generates a pulse. Figure 2: DDA interpolation structure with decimal control. value is 1 so that code can be easy to handle and hardware resource can be saved as well). PDF | A software interpolator which is comprised of linear and circular interpolations is compared with its hardware counterpart and with other circular.

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Digital differential analyzer (graphics algorithm) – Wikipedia

From Wikipedia, the free encyclopedia. Please help to improve this article by introducing more precise citations. Computer graphics algorithms Digital geometry. For the digital implementation interpolatipn a differential analyzer, see Digital differential analyzer.

They can gardware extended to non linear functions, such as perspective correct texture mappingquadratic curvesand traversing voxels.


In fact any two consecutive point x,y lying on this line segment should satisfy the equation. June Learn how and when to remove this template message.

The DDA method can be implemented using floating-point or integer arithmetic. By using this site, you agree to the Terms of Use and Privacy Policy. This process is only efficient when an FPU with fast add and rounding operation will be available. The native floating-point implementation requires one addition and one rounding operation per interpolated value e.

Interpoltaion k takes integer values starting from 0, for the 1st point and increases by 1 until endpoint is reached. The fixed-point integer operation requires two additions per output cycle, and in case of fractional part overflow, one additional increment and subtraction.

Similar calculations are carried out to determine pixel positions along a line with negative slope. A line is then sampled at unit intervals in one coordinate and corresponding integer values nearest the line path are determined for the other coordinate.


In computer graphicsa digital differential analyzer DDA is hardware or software used for interpolation of variables over an interval between start and end point. A linear DDA starts by calculating the smaller of interplation or dx for a unit increment of the other. Retrieved from ” https: This page was last edited on 17 Julyat DDAs are used for rasterization of lines, triangles and polygons.

Views Read Edit View history. This article is about a graphics algorithm. For lines with slope greater than 1, we reverse the interpolatoon of x and y i. This article includes a list of referencesrelated reading or external linksbut its sources remain unclear because it lacks inline citations.