Post your idiot spare time projects. i'm the subtle buttocks

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > YOSPOS > Post your idiot spare time projects. i'm the subtle buttocks

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Panty Saluter: Jan 17, 2004; Making learning fun!

i have a hakko 508, which is just a very basic 40w pen type. its ok i guess, no worse than similarly priced wellers and such. im no solder pro but i wonder how much a nicer station would help. i still have trouble getting even small wires hot enough to make the solder flow properly

# ? Aug 25, 2013 02:26

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# ? Jun 7, 2023 23:45

Dr. Honked: Jan 9, 2011; eat it you slaaaaaaag

Detroit Q. Spider posted:

i have a hakko 508, which is just a very basic 40w pen type. its ok i guess, no worse than similarly priced wellers and such. im no solder pro but i wonder how much a nicer station would help. i still have trouble getting even small wires hot enough to make the solder flow properly

i regularly use 25 watt pieces of poo poo that cost ten buxx and i do not have that problem, maybe you are not wetting your tip properly or something???

wet your tip everyday

# ? Aug 25, 2013 02:50

Sagebrush: Feb 26, 2012

yeh wet the tip before every joint basically. just a tiny drop, enough to make a liquid connection so the heat conducts

if the tip isn't shiny, and instead is dusty gray/brown/yellow with old oxides, it's hosed up. melt solder (rosin-core only) all over it and roll it around until you get a bunch of black dross rising to the top and the solder starts to stick instead of balling up. then keep adding more and wiping it off until the whole tip is shiny metallic coated. always make sure the tip is shiny and metallic before you start soldering

tip maintenance is like 95% of getting a good connection

# ? Aug 25, 2013 03:02

Dr. Honked: Jan 9, 2011; eat it you slaaaaaaag

maintain this one weird old tip

# ? Aug 25, 2013 03:04

Panty Saluter: Jan 17, 2004; Making learning fun!

Sagebrush posted:

yeh wet the tip before every joint basically. just a tiny drop, enough to make a liquid connection so the heat conducts

if the tip isn't shiny, and instead is dusty gray/brown/yellow with old oxides, it's hosed up. melt solder (rosin-core only) all over it and roll it around until you get a bunch of black dross rising to the top and the solder starts to stick instead of balling up. then keep adding more and wiping it off until the whole tip is shiny metallic coated. always make sure the tip is shiny and metallic before you start soldering

tip maintenance is like 95% of getting a good connection

this is v. helpful, i didnt know the process for tip wetting

but then again most goons dont!!!

# ? Aug 25, 2013 06:21

spankmeister: Jun 15, 2008

Dr. Honked posted:

maintain this one weird old tip

# ? Aug 25, 2013 08:06

GameCube: Nov 21, 2006

also gently caress wet sponges, get yourself one of these

# ? Aug 26, 2013 20:09

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

# ? Aug 26, 2013 20:23

Jonny 290: May 5, 2005; [ASK] Me About OS/2 WARP

Werthog 95 posted:

also gently caress wet sponges, get yourself one of these

don't post R2D2 genitals tia

# ? Aug 26, 2013 20:23

Smythe: Oct 12, 2003; no meds = f4

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

ur rly smart

# ? Aug 26, 2013 20:28

echinopsis: Apr 13, 2004

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

aren't their lubraires that do this for you

or are you doing it for ~*ThE ChAlLeNgE*~

# ? Aug 26, 2013 20:36

spankmeister: Jun 15, 2008

echinopsis posted:

aren't their lubraires that do this for you

or are you doing it for ~*ThE ChAlLeNgE*~

dude just leave him be hell have one of them nonbias thingamabobs you like so much running in no time.

# ? Aug 26, 2013 20:38

computer toucher: Jan 8, 2012

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

Most people play with their python to avoid blue balls gj

# ? Aug 26, 2013 20:39

DaTroof: Nov 16, 2000; CC LIMERICK CONTEST GRAND CHAMPION
There once was a poster named Troof
Who was getting quite long in the toof

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

Nice!

is this part of a bigger project or just fun experiments (not to say that "just fun" is a bad thing)

cistps: last week i finally managed to mock a 3d perspective with sprites, now i need to reverse-engineer a bunch of crap i hard-coded into the algorithms to make them work with arbitrary screen resolutions

# ? Aug 26, 2013 20:39

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

oh i'm sure i could do like

code:

import 3d

ball=([320,240,0],[127,127,255],80)
light = [500,500,500]

3d.drawlitball(ball,light)

and be done but yeah i'm doing it to learn mainly

# ? Aug 26, 2013 20:39

Socracheese: Oct 20, 2008

if you're gonna make yourself suffer you might as well use C, it'll probably at least be a lil faster. probably not much tho. would be interesting to see the difference

# ? Aug 26, 2013 20:48

GameCube: Nov 21, 2006

idk seems like that'd double the suffering. suffer the math or suffer the programming imo

# ? Aug 26, 2013 20:54

DaTroof: Nov 16, 2000; CC LIMERICK CONTEST GRAND CHAMPION
There once was a poster named Troof
Who was getting quite long in the toof

if he decides to savagely optimize it in c down the road at least he'll already understand the fundamental algorithms

# ? Aug 26, 2013 21:03

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

i imagine there are some significant speedups that i could do, mainly in the areas of simplifying the trig functions and making sure each pixel within the defined area is only called once

oh and that pixels on the other side of the ball from the light source aren't touched

right now it calls a trig function five times per pixel which is definitely way overkill

# ? Aug 26, 2013 21:06

echinopsis: Apr 13, 2004

ol qwerty bastard posted:

oh i'm sure i could do like
code:
import 3d

ball=([320,240,0],[127,127,255],80)
light = [500,500,500]

3d.drawlitball(ball,light)
and be done but yeah i'm doing it to learn mainly

i respect it

are you using an accepted falloff algorithm or just normal directions?

# ? Aug 26, 2013 21:17

peepsalot: Apr 24, 2007; ��PEEP THIS...
��BITCH!

now throw some specularity on dat ho

# ? Aug 26, 2013 21:19

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

echinopsis posted:

i respect it

are you using an accepted falloff algorithm or just normal directions?

not sure exactly what you mean but i'm first calculating the intensity of light hitting a point as (some constant)/(distance from point to light source)² and then multiplying that by the dot product of the surface normal (unit) vector and the unit vector from the point to the light source to get the actual brightness of the point

(then the point gets drawn as just its x and y coordinates; i'll mess around with depth and visual field and camera angles and poo poo later)

# ? Aug 26, 2013 21:22

Bloody: Mar 3, 2013

http://en.wikipedia.org/wiki/Fast_inverse_square_root for your lighting math needs

this isnt a spoiler of your own future work because this is something i can pmuch guarantee you never arrive at independently while also being cool enough and simple enough to understand

# ? Aug 26, 2013 21:29

GameCube: Nov 21, 2006

hey if carmack could do it why not this guy

man I would have been so much more into math in high school if each unit culminated in some sick graphics demos using what we learned

# ? Aug 26, 2013 21:37

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

my problem with programming is i get sidetracked a lot

FOR EXAMPLE i thought "man, my lit sphere thing looks like a planet's day/night cycle, i wonder if i could make it look more like a planet by putting clouds on it"

and then "the clouds should evolve with time, though, and look realistic; i wonder how hard it is to do 2-D CFD on the surface of a sphere"

so now i'm bashing together a silly little fluid mechanics program; right now it's only going on a regular 2-D plane but it's interesting watching it evolve:

(red is x-velocity, blue is y-velocity at each point)

# ? Aug 26, 2013 22:43

Panty Saluter: Jan 17, 2004; Making learning fun!

Werthog 95 posted:

also gently caress wet sponges, get yourself one of these

got one of those

# ? Aug 26, 2013 22:55

Symbolic Butt: Mar 22, 2009; (_!_); Buglord

ol qwerty bastard posted:

so now i'm bashing together a silly little fluid mechanics program; right now it's only going on a regular 2-D plane but it's interesting watching it evolve:

(red is x-velocity, blue is y-velocity at each point)

neat, I wish I studied more these physics instead of just observing the patterns in meteorological maps when I worked with these things

# ? Aug 26, 2013 23:05

echinopsis: Apr 13, 2004

Detroit Q. Spider posted:

got one of those

$8 from fasttech

ol qwerty bastard posted:

not sure exactly what you mean but i'm first calculating the intensity of light hitting a point as (some constant)/(distance from point to light source)² and then multiplying that by the dot product of the surface normal (unit) vector and the unit vector from the point to the light source to get the actual brightness of the point

(then the point gets drawn as just its x and y coordinates; i'll mess around with depth and visual field and camera angles and poo poo later)

I don't mean to judge coz what you're doing is light years ahead of what I can do but [and u might not care] but that falloff your using [the reflection dimming as the angle increases] I don't think is very physically accurate at all. u may not care but either way I respect your work! u doing well m8

# ? Aug 26, 2013 23:35

hubris.height: Jan 6, 2005; Pork Pro

wow fukken nice qwerty.

i just got collision kinda working a little bit, some issues with call order and such. you're an inspiration and god speed to applying that to your 3d sphere

# ? Aug 26, 2013 23:53

coffeetable: Feb 5, 2006; TELL ME AGAIN HOW GREAT BRITAIN WOULD BE IF IT WAS RULED BY THE MERCILESS JACKBOOT OF PRINCE CHARLES

YES I DO TALK TO PLANTS ACTUALLY

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

qwerty go download + play with Unity3D. you will be suitably impressed. you can manipulate as much or as little of the low-level stuff as you want.

(i spent the day w/ a very similar blue sphere. trying to implement a player-manipulable mesh in such a way that when i scrap spherical coords in favour of a cubed sphere, it won't break everything)

# ? Aug 26, 2013 23:56

Symbolic Butt: Mar 22, 2009; (_!_); Buglord

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

I know you like creating your own implementation of vectors and dot products and stuff and it's neat doing it once but consider using numpy arrays because it'll be a great skill to have in your sleeve.

numpy is kinda painful at first because the data structures aren't as straightforward to use as the built-ins but hey it's fortran-like numerics calculations speed at your reach :science:

# ? Aug 26, 2013 23:59

Jenny Agutter: Mar 18, 2009

ol qwerty bastard posted:

this week's project: same as last week, but now in THREE_{THREE_THREE}DEE_{DEE_DEE}

so far i've got lighting figured out; holy hell it takes a long time to light a sphere though. basically doing the vector math at each point on its surface to figure out the intensity (dot product of the normal vector with the unit vector pointing at the light source)

im just going to echo what everyone else is saying, this is some cool stuff you are doing. are you still getting graphics through pygame? or was that someone else? in addition to whats been suggested, programming with opengl can get you some speedup by offloading display functions to your graphics card, and creating a little 3d solar system was one of the first exercises i did. but it might be a little too close to the "import 3d" stuff you want to avoid

# ? Aug 27, 2013 00:38

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

i dunno if i'll do anything substantially more interesting with 3d stuff but i'll probably look into opengl and such if i do

this is definitely just a learning exercise for me; there's nothing practical about it at all

(yeah i'm still using pygame for these things)

# ? Aug 27, 2013 02:38

echinopsis: Apr 13, 2004

you own mate go have a beer

# ? Aug 27, 2013 02:56

Moist von Lipwig: Oct 28, 2006; by FactsAreUseless; Tortured By Flan

yeah seriously qwerty that poo poo owns, super jealous

my little javascript thing is finally complete(maybe)

don't think I'll add many more features at this point but it was a fun ride

SquatBot

# ? Aug 27, 2013 03:14

ol qwerty bastard: Dec 13, 2005; If you want something done, do it yourself!

final thing for tonight: made the ball bounce around in 3d space with a light just off to the right of the screen

tomorrow perhaps... two balls! i already wrote the collision algorithm from my bouncysticky 2d ball program to work in 3d so that should be straightforward; harder will be getting the balls to cast shadows on each other

# ? Aug 27, 2013 03:21