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Messages - Xeda112358
Pages: 1 ... 57 58 [59] 60 61 ... 317
871
« on: June 30, 2013, 10:00:46 pm »
Oh, the BASIC raycaster is more like a pseudo-3D thing, but the topic is here. I based that off of Lodev's tutorial and code by Matrefeytontias. I'm not all that good at 3D stuff, but I found some math about 3D rotations and whatnot in my Linear Algebra book. I have some difficulty figuring out the right way to do projections, still.
872
« on: June 30, 2013, 06:21:22 pm »
I found a few errors in the log_2 routine (translation issues from hex->assembly). As well, I rearranged the code and in all saved a byte and some t-states  I updated the first post with my preferred version which is slightly speed optimised in the same way as the last version. Here is a cleaner, smaller version and is only slightly slower (about 39 t-states on average): Log_2_88_size:
;Inputs:
; HL is an unsigned 8.8 fixed point number.
;Outputs:
; HL is the signed 8.8 fixed point value of log base 2 of the input.
;Example:
; pass HL = 3.0, returns 1.58203125 (actual is ~1.584962501...)
;averages about 39 t-states slower than original
;62 bytes
ex de,hl
ld hl,0
ld a,d
ld c,8
or a
jr z,DE_lessthan_1
srl d
jr z,logloop-1
inc l
rr e
jr $-7
DE_lessthan_1:
ld a,e
dec hl
or a
ret z
inc l
dec l
add a,a
jr nc,$-2
ld e,a
inc d
logloop:
add hl,hl
push hl
ld h,d
ld l,e
ld a,e
ld b,8
add hl,hl
rla
jr nc,$+5
add hl,de
adc a,0
djnz $-7
ld e,h
ld d,a
pop hl
rr a ;this is right >_>
jr z,$+7
srl d
rr e
inc l
dec c
jr nz,logloop
ret
Also, I used 'rr a' here for the flags to test if a>1 (the c flag is reset before hand, but I could have used sra a or srl a or bit 1,a or bit 1,d).
873
« on: June 30, 2013, 08:29:00 am »
874
« on: June 29, 2013, 09:19:54 am »
Have you checked the batteries? And yeah, I did that to one of my motors and it is no longer as powerful :[
875
« on: June 29, 2013, 09:17:07 am »
Maybe a piece got stuck in a gear?
876
« on: June 28, 2013, 07:36:43 am »
Cool, I just started really learning C++ a few days ago, too! I finally made the start of a Mandelbrot set explorer yesterday I basically just used Google to look up how to do things. If I know what the code is supposed to do, then I can usually figure out what each part of the code is doing and that is how I am learning new things. My code is pretty ugly, but I am hoping it will get better as I get more experience  Here is a video : https://docs.google.com/file/d/0B4HNIXQZLWM8ZzJUV2NFa3V1LU0/edit?usp=sharingIt makes me really strain my brain to learn this stuff, but it is rewarding! EDIT: It is so much more of a pain to set up than TI-BASIC 
878
« on: June 27, 2013, 08:43:20 am »
Cats. Ponies and cats. Hide your data in such images and use algorithms to extract the data. We have been working for years to establish our Trojan Horse, now we must use it wisely. * Xeda112358 runs
879
« on: June 26, 2013, 10:58:24 pm »
Some commands I think you should have are:
For math:
+,-,*,/,^,log2,sqrt() and maybe some trig functions
Some bit operations such as arbitrary shifts/rotates and bit-logic
For Graphics:
Line, Circle, Sprite, Rectangle, lcd refresh
For Input/Output:
getkey, Text()
And a few commands for creating and editing files.
That should make for a light language and still powerful. As well, there should be an easy way to incorporate assembly for users that want to be very precise with what there program does.
If the math can return information such as the c,z, and sign flags (maybe store this in a system var), that would also be very useful. If users needed, say, 32-bit math precision, this would help.
Good luck!
880
« on: June 26, 2013, 10:34:57 am »
I plan to work with this later, thanks! I really need a prettier font 
881
« on: June 25, 2013, 06:50:15 pm »
Oh, I see .__. If it is possible, do you plan to have any kind of interpreted language? It might make it easier to keep program size down, but the cost would be consuming flash memory.
882
« on: June 25, 2013, 06:46:25 pm »
Hmm, why does it have to load to RAM to run? Is there no way to let it run from flash? If it is an interpreted program, I would imagine that it could be sourced directly from flash (though this has potential to be slower).
883
« on: June 25, 2013, 11:07:29 am »
That is really cool, Matrefeytontias, especially the stuff that looked like 3D Pong!
884
« on: June 25, 2013, 10:46:04 am »
16KB of flash and 2KB of RAM, while doable, that seems like it isn't... much. With the 20MHz speed and 2 processors, is it possible to have more? TI calculators currently have more totally memory available just in RAM.
But otherwise, this is excellent! How fast does the LCD respond?
EDIT: Now I see that there is a microSD slot, cool!
885
« on: June 25, 2013, 09:24:37 am »
There is xLIB CSE that makes use of a pallet and it might be possible to adapt the pallet to be customisable.
Also, how many colors do you have currently? If you are using 16 colors, then it would actually be pretty easy to compress the pics to half their size without any data loss. (1 nibble can hold a value from 0 to 15).
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