A digital differential analyzer (DDA), also sometimes called a digital integrating computer, is a digital implementation of a differential analyzer. The integrators in a DDA are implemented as accumulators, with the numeric result converted back to a pulse rate by the overflow of the accumulator.
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| - Digital differential analyzer (en)
- Digital Differential Analyzer (pt)
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| - A digital differential analyzer (DDA), also sometimes called a digital integrating computer, is a digital implementation of a differential analyzer. The integrators in a DDA are implemented as accumulators, with the numeric result converted back to a pulse rate by the overflow of the accumulator. (en)
- O Analisador Diferencial Digital (em inglês Digital Differential Analyzer ou simplesmente DDA) é uma implementação digital do . Os integradores em uma DDA são implementados como acumuladores, com o resultado numérico convertido a uma sequência de pulso pelo do acumulador. Segue o código para o algoritmo do DDa em C++ (pt)
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| - A digital differential analyzer (DDA), also sometimes called a digital integrating computer, is a digital implementation of a differential analyzer. The integrators in a DDA are implemented as accumulators, with the numeric result converted back to a pulse rate by the overflow of the accumulator. The primary advantages of a DDA over the conventional analog differential analyzer are greater precision of the results and the lack of drift/noise/slip/lash in the calculations. The precision is only limited by register size and the resulting accumulated rounding/truncation errors of repeated addition. Digital electronics inherently lacks the temperature sensitive drift and noise level issues of analog electronics and the and "lash" issues of mechanical analog systems. For problems that can be expressed as differential equations, a DDA can solve them much faster than a general purpose computer (using similar technology). However reprogramming a DDA to solve a different problem (or fix a bug) is much harder than reprogramming a general purpose computer. Many DDAs were hardwired for one problem only and could not be reprogrammed without redesigning them. (en)
- O Analisador Diferencial Digital (em inglês Digital Differential Analyzer ou simplesmente DDA) é uma implementação digital do . Os integradores em uma DDA são implementados como acumuladores, com o resultado numérico convertido a uma sequência de pulso pelo do acumulador. Segue o código para o algoritmo do DDa em C++ #include #include #include using namespace std;int x1, x2, yl, y2;int main{ int dx,dy,k; float xin, passos, yin, x, y; cout << "insira x1 e y1: "; cin >> x1 >> yl; cout << "insira x2 e y2: "; cin >> x2 >> y2; dx = x2 - x1; dy = y2 - yl; if( abs( dx ) > abs( dy ) ) { passos = abs( dx ); } else { passos = abs( dy ); } xin = dx / passos; yin = dy / passos; x = x1; y = yl; round( x ), round( y ); for( k=1; k < passos; k++ ) { round( xin ), round( yin ); x = x + xin; y = y + yin; round( xin ), round( yin ); cout << "x" << k << ":" << x << " " << "y" << k << ":" << y << endl; } system( "PAUSE" ); return EXIT_SUCCESS;} (pt)
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