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Yeah, that is certainly incorrect. Not only are perpendicular lines perpendicular regardless of the display aspect ratio (edit: as long as you set the projectio
by exDM69 11y ago
Yeah, that is certainly incorrect. Not only are perpendicular lines perpendicular regardless of the display aspect ratio (edit: as long as you set the projection axes correctly), you can adjust the displayed range in the TI.
And the pixels in the display are square shaped (unlike e.g. Commodore 64 in some modes), so there's no distortion from that either.
- thaumasiotes 11y agoI'm not sure what you think the display aspect ratio means, but a 2:1 aspect ratio means that the horizontal axis of a graph will get scaled by a factor of 2 if the window is displaying a square section of space. The lines y = x and y = -x are perpendicular. 2:1 scaling means the line y = x will appear on screen as y = 0.5x . A line perpendicular to that would have slope -2. But the line y = -x, which is actually perpendicular to y = x, will instead appear on screen as y = -0.5x .
- exDM69 11y ago> that the horizontal axis of a graph will get scaled by a factor of 2 if the window is displaying a square section of space. Yes, exactly. But you can adjust the axes of the graph to get an 1:1 display (ie. x is -10..10 and y is -5..5, not a square space). And that is the default in the TI graphs IIRC. So as long as you set up the projection to match the screen resolution aspect ratio, you'll get perpendicular lines correctly.
- vardump 11y agoAt least on TI-85, I think the pixels are slightly taller than wide, by about 20%. Not square shaped. I'd assume same is true for other TI-8x calculators.
- thaumasiotes 11y agoAs discussed in the other comments, the default window is -10..10 and -10..10 in 3:2 aspect ratio.