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Messages - fb39ca4
Pages: 1 ... 7 8 [9] 10 11 ... 126
121
« on: December 24, 2013, 11:41:44 pm »
122
« on: December 22, 2013, 10:53:27 pm »
So for PWM it will really be 36,000 writes to the link port per second? And if I am doing PWM at 18KHz, won't the noise from that be audible?
123
« on: December 22, 2013, 04:49:55 pm »
With the recent improvements in video compression I have made, it appears that I will have 500-550KB of space in Bad Apple which I can use for audio, which works out to 18kbits/s. Because of this, I want to try playing back waveform audio of the original song, rather than synthesized notes. What are the pros and cons of different methods used to play back 8 bit audio on 1 bit outputs used by other sound applications like RealSound and TruSound? I haven't found much information about how they work. I also found this algorithm, which encodes higher bit audio down to 1 bit by predicting the behavior of an RC filter, so how does it compare?
124
« on: December 22, 2013, 01:50:03 pm »
To extract the frames, I losslessly reencoded the video in handbrake, resizing it to 96x72. (I'm sure I could have done the cropping in that step as well, but the settings are confusing.) Then, I ran ffmpeg on the resulting video, using (if I remember correctly) -o badapple%05d.png to output each frame to a numbered .png file. From there, my python encoding script crops, converts to monochrome, encodes, and places into page .bin files each frame.
125
« on: December 22, 2013, 01:37:49 pm »
Nice to see some competition.  By the way, I'm currently at 966,656 bytes including executable code and wasted space in the app pages.
126
« on: December 22, 2013, 01:05:19 pm »
I was also using interlacing in the previous GIF, but here it is much more visible as I had a bug that made the "upper" frames display on the "lower" scanlines and vice versa. I also fixed the problem last night, but forgot to upload the updated version, so here it is. There's no visual difference, but I managed to make the file size smaller.
127
« on: December 22, 2013, 01:35:46 am »
I've been making some progress on P-Frames. It's not quite ready yet, as you can see in this GIF:
128
« on: December 22, 2013, 12:25:10 am »
In Firefox, it runs smoothly for a minute, and then the framerate drops to 15FPS for ten seconds or so, while the keyboard inputs continue to be accepted at the normal rate. This has the effect of making the ship continue to move in the direction you were holding down during the framerate drop for several seconds after the framerate goes back to normal again.
129
« on: December 21, 2013, 09:48:45 pm »
What is the purpose of the for loops?
Hexatron: For drawing a line representing the hands of a clock? The implicit equation for a circle would not be helpful in that case. You want the starting and ending point for the line drawing command. The starting point is the center of the circle, and the end is at some point on the edge of the circle at the particular angle. You can use trig to calculate that ending point.
130
« on: December 21, 2013, 11:43:43 am »
You should make the program automatically change settings to radians and maybe keep the previous setting in memory if that's possible in HP PPL, for people who don't like when programs overwrite their settings, since another program (Trailblazer) requires Degree mode to be on.
What is this, the 90s? You'd think we could have moved beyond global variables by then.  I actually liked what the Nspire did, where you could add a degree sign (or a tiny r for radians) to your number. I wonder if something like this is possible with the Prime.
131
« on: December 21, 2013, 01:17:31 am »
This is how it should be.  Could it be possible to make a scaled-down monochrome grayscale version of this? It looks interesting and I want to play it, but I don't have a CSE.
132
« on: December 20, 2013, 09:49:42 pm »
Sounds good! Here is the version with the timing fix.
133
« on: December 20, 2013, 08:05:33 pm »
I didn't fix the sound glitch. It happens when using two sound channels and I disabled one of them in this version.
134
« on: December 20, 2013, 07:00:14 pm »
A simple way:
Type your equations as Yn = (Yn being any of the then equations) - and in the homescreen enter "DrawInv Yn". That swaps X and Y axis around.
I learned something new today.
135
« on: December 20, 2013, 06:42:27 pm »
What I wish is that we find ways to crack the TI-Nspire RSA keys faster. But then, TI will have switched to something else long ago.
An attack like this would not help for the Nspire, because the private keys are never present on the calculator in the first place.
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