Image noise: Difference between revisions
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(Added Axe) |
(→{{header|Axe}}: Added optimizations, FPS count info, and randomization info) |
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Instead of naively drawing each pixel to the screen, this implementation directly writes random numbers to the buffer, which randomly sets each pixel. Because Axe does not have native clock support, the FPS counter is simulated by counting "ticks" at the known interrupt rate of 107.79 Hz (rounded to 108). |
Instead of naively drawing each pixel to the screen, this implementation directly writes random numbers to the buffer, which randomly sets each pixel. Because Axe does not have native clock support, the FPS counter is simulated by counting "ticks" at the known interrupt rate of 107.79 Hz (rounded to 108). |
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It is possible to notice some vertical line patterns in the noise. This is likely due to the pseudorandom number generator and not the drawing method. |
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<lang axe>0→F |
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This example gets steady 48 FPS on a TI-84 Plus Silver Edition running at 15 MHz. It gets 26 FPS when running at 6 MHz. |
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<lang axe>.Enable 15 MHz full speed mode |
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Full |
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.Disable memory access delays (adds 1 FPS) |
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Fullʳ |
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.Setup |
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0→F |
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0→N |
0→N |
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Fix 5 |
Fix 5 |
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fnInt(FPS,6) |
fnInt(FPS,6) |
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.Flush key presses |
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While getKey(0) |
While getKey(0) |
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End |
End |
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Repeat getKey(0) |
Repeat getKey(0) |
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NOISE() |
NOISE() |
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RecallPic |
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F++ |
F++ |
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Text(0,0,F*108/N▶Dec) |
Text(0,0,F*108/N▶Dec) |
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End |
End |
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.Clean up |
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LnRegʳ |
LnRegʳ |
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Fix 4 |
Fix 4 |
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Return |
Return |
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.Draws random noise to the back buffer |
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Lbl NOISE |
Lbl NOISE |
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ClrDraw |
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ClrDrawʳ |
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For(I,0,5) |
For(I,0,5) |
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For(J,0,63) |
For(J,0,63) |
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rand→{J*12+(I*2)+ |
rand→{J*12+(I*2)+L₆}ʳ |
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End |
End |
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End |
End |
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Return |
Return |
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.Increments the tick counter |
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Lbl FPS |
Lbl FPS |
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N++ |
N++ |
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