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Help support Wordnik (and make this page ad-free) by adopting the word deltay.
Examples
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Y dw 0; current working y coordinate on line deltax dw 0; number of pixels / iteration we advance x using Bresenham's line drawing algorithm deltay dw 0; number of pixels / iteration we advance y using Bresenham's line drawing algorithm error dw 0; used to determine which side of the true line we place each pixel
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; initialise deltax with the absolute difference between its start and end x coordinates mov ax, startx mov bx, endx cmp ax, bx ja otherx sub bx, ax mov deltax, bx jmp dodlty; go to process deltay now otherx: sub ax, bx mov deltax, ax
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; do other initialisations for the algorithm (error, Xgrad, X and Y) inits: mov error,0; initialise error mov ax, deltay; initialise Xgrad mov Xgrad, ax mov ax, startx; initialise working coordinates X and Y mov X, ax mov ax, starty mov Y, ax
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