Game Development - 2015-07-31 (page 2 of 2)

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5:01 PM

@MickLH ^

oh sorry

@Tyyppi_77 Lets check by assuming the facts and seeing if that implies what we want

    so bisection will find `t` where `f(t) = 0`, so start from your equation
f(t) = cubic_bezier(0, x1, x2, 1, t) - x
    and replace f(t) with 0
cubic_bezier(0, x1, x2, 1, t) - x = 0
cubic_bezier(0, x1, x2, 1, t) = x

you can replace the "$$" with "`"

hehe

if that works in a multiline.... I guess not

oh well

:P

user92578

@MickLH So it's right, right?

user92578

5:07 PM

HMM I might be getting accurate results

@Tyyppi_77 Yeah, as long as that's what you want to calculate

checked my latest phone bill, got charged for movies

like, pay per view

CAVEAT, I don't have TV service

lol

I think I might post this on reddit to see if others had similar charges

user92578

pastebin.com/StcsuJmw

5:08 PM

That's horrible

This is no laughing matter, the system charged me for something that is not even possible

Sounds like the usual, @Jon. I'm almost sure at this point that they just add random charges here and there to get money out of the people who don't notice or are too lazy and/or incapable of fighting back

Literally every single person I know, with every single phone and internet provider, has been able to find some charges somewhere that they did not rightfully incur.

And have been able to get the charges cancelled and refunded over the phone in most cases

user92578

What kind of precision limit would I like?

@Tyyppi_77 Might as well go to machine precision

Float only has 24-bits of mantissa to fill

user92578

So is there a constant I can just query?

user92578

5:11 PM

epsilon

just do 24 iterations lol

user92578

Oh

That's not a perfect way to deal with it, it's oversimplifying the situation

But, it's close enough

user92578

It exits at my check earlier

user92578

if (abs(BezierFunctionCall(x1, x2, c, t)) < FLT_EPSILON) return c;

5:13 PM

As expected

user92578

at 22 iterations, it seems to find the closest value possible in float space?

Floats are non-linear

You lose precision as the absolute value grows larger

user92578

Okay, so I did 10 checks using the bezier editor, checking values in the editor and what my code returns

user92578

seems to return quite nice results

Plot graphs! everyone loves graphs

user92578

5:16 PM

I don't think I can render those easily in my game

loop() { printf("[%f,%f],", x, y); }

user92578

okay

copy paste into maxima, plot2d([discrete, [],[],[].....])

user92578

the printf data?

Yeah, that's the format for plotting a table of data in maxima

user92578

5:18 PM

how many points would I want?

100?

enough to make it worth graphing?

as close to infinity as you're willing to approximate?

100?

user92578

100 might be good

user92578

uuum

user92578

windows console is not good for this stuff

5:23 PM

ouch lol

pipe your output to a file

C:\> GunHero.exe > log.txt

@Tyyppi_77 windows console isn't good for much compared to Cygwin

user92578

I normally use a custom console, Console 2 I think

oh god I'm not relying on Cygwin am I? I could have sworn vanilla windows console can pipe

user92578

yeah it can

I don't understand how it can feel like so much work, tabbing between windows and typing

And so I'll have to take a break.. by tabbing between windows and typing

user92578

5:28 PM

fuck the text is disappearing in maxima when i paste in

@Tyyppi_77 I understand if you call fuckits here

user92578

the clipboard data is all valid

user92578

pastebin accepts it

user92578

what the fuck is wrong with maxima?

I always use right-click paste

I think the problem is in the wxWidgets front end

user92578

5:30 PM

yeah it's still disappearing

I get horrible sketchy behavior from all copy/paste operations, but it's minimzed when using the right click menu exclusively

I forgot all the subtle details but it's just programmed into my unconscious at this point

Like moving the I beam cursor thing to home and end and selecting the last character or something

user92578

tried restarting maxima

Some magical voodoo that makes it accept a paste, or not deselect while copying

It's really, really bad

And restarting never helps, only the voodoo, for me

Sometimes I literally just use the command line version instead

user92578

same commands work there I suppose?

Yeah everything is the same, except you will get ASCII art instead of rendered math

5:33 PM

user image

apparently a rejected flag design from my province, lol

lol

Whoever came up with that flag, should not

user92578

hmm the data is not complete

user92578

there are a few points missing at the end

@Tyyppi_77 do you mean the values are wrong, or there just aren't samples?

user92578

it ends at [0.97

user92578

5:36 PM

and then nothing

user92578

no y value, no closing parenthesis

user92578

so no samples

meh, sounds like your program maybe ended before the buffer flushed

@Jon who the fuck

Literally, the only way I could imagine to make that flag worse would be to put a big swastika on it... no even that would just dilute how horrible mosquitoes are

user92578

5:37 PM

how do I make the console thing execute?

@Tyyppi_77 how do I parse meaning?

user92578

like what shift-enter does in the gui app

oh, you need a semicolon at the end of every command

user92578

oh

The GUI adds it for you

user92578

5:39 PM

it renders an odd sized plot

If it's in a gnuplot window, you can just resize it, and click the button in the top left

It re-draws at the resolution you resized to

user92578

the axes are weird

user92578

x goes from -1 to 1

user92578

y goes from 0.0003 to 0.001

uh.. and that doesn't match the range of your samples? that's kinda fucking weird

user92578

5:41 PM

yeah

anyways, just give maxima explicit range then plot2d(....... , [x, 0, 1], [y, 0, 2]);

Sometimes, it's so hard to stick with this program lol

user92578

do the ranges go in the [] or the ()?

() like: plot2d([discrete, [x1,y2],[x2,y2]], [x,0,1], [y,0,2]);

user92578

now there's nothing in the plot

user92578

maybe my data is wrong then

5:44 PM

Did you check the numbers in the text you copied.... ?

To make sure they are.... numbers?

user92578

yeah, they look valid

As in, not all near zero

1.38475364E-16, 0.38745639E-16

user92578

[0.000000,0.000000], [0.001000,0.000374], [0.002000,0.000749], [0.003000,0.001126] and then they keep groving

alright well screw it, that's good enough

user92578

would you want to try if I paste you the data?

5:45 PM

sure

user92578

pastebin.com/9kWE7HRh

put another [ ] around your data points

I don't know why maxima is choking without it, but that worked for me

user92578

okay

user image

user92578

Yup!

user92578

5:49 PM

Thank you so fucking much Mick

user92578

I never could've done this without your help

np, glad we got through it :P

user92578

me too... I learned a lot

user92578

Not only about these curves but also about tools that I can use for this stuff

:)

I already investigated using the closed form solution directly... and that requires you to either 1. implement complex numbers in C++ (ugh) or 2. manipulate your formula to operate in the entirely real domain (ugh)

user92578

5:52 PM

Okay

I tried the 2nd approach, because it should be shorter code... After some squeezing I got it down to 2 kb of nasty raw C++ with all 3 letter variable names

I basically recommend against it lol

user92578

aight that's kinda nice to hear

user92578

sorry you had to go trough all that work tough

haha nah don't worry, I didn't do much by hand

I've already written tools to do these manipulations

Sometimes I can't get around it, and need a big nasty formula in a simulation

user92578

ah that's a relief then :)

5:54 PM

I haven't tried implementing Newton's method yet

but that's my knee-jerk reaction to this problem

user92578

Right the derivative method, right?

Yes

I might even do a higher order householder method

user92578

okay then

user92578

I really gotta call it a day now

user92578

I'll see if it needs / I can do some optimizations tomorrow

5:55 PM

:D

I haven't worked on a programming thing all day.... I probably should at some point

user92578

Thanks once again, maybe next time I don't have to be taught everything by practically holding my hand

user92578

cya guys

peace

Oh, I just realized the secant method should give fast convergence like newton, but without calculus tools

peace

Math way above my head

I'm taking pre-calc next year in school

They need to be teaching calculus in the 4th grade

can you imagine real life @Pip? yeah? ok you know calculus at some level lol

5:59 PM

:P

I agree that it should to taught earlier... I don't know about 4th grade though

man if I took the time to draw a picture of newton's method... you'd say "Yeah, obviously." and I'm not a teacher lol

lol, I just reserved my "Windows 10"

I recommend reading "Issac Newton" by James Gleik. Great book, and it's short.

don't they know, it's already released and I should be just reserving it?

Issac was some kind of fucking weirdo

But he said this: "I was like a boy playing on the sea-shore, and diverting myself now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me."

6:13 PM

Then he got stung by a jellyfish and said "Fucken shit"

He didn't like to tell people about his discoveries... unless it looked like someone else might discover it, and he was loathe to have it look like they found it first.

i think i am gonna try to self finance this next car

not sure if wise

what you mean

pay cash for a car?

they have cash discount, but their financing sucks

yeah, pay cash

smart

6:16 PM

i have a line of credit

getting a loan for an asset that depreciates as fast as a car is not the best thing

paying cash is better

well its not upfront cash

i'd have to pay interest on it

oh ok

but its not a lean

how much

right

6:17 PM

Jello everyone :D

lien I think you mean

if you finance through dealership, you have to make minimum payments

if you miss one, they can repo the car

yeah

what's your interest rate?

4.4%

its not great, but at 30k, it accumulates about 120$ interest per month

not bad for a car, though usually you can get certain cars at 0%

though there's still the lien issue

6:18 PM

Yeah

but the deals are, either you get a CASH incentive, or a great financing rate

i kinda like the cash incentives the more I look at them

Well, you're a smart guy you can do that math and see which costs you more :)

i guess i'll have to do math, lol

still not sure what I am getting though

going to test drive in 40 mins :D

cool what you trying?

user image

Ford Explorer

BIG

we have

user image

6:20 PM

its actually small

Turbo

yeah, i am avoiding the turbo

love it.

premium gas ain't cheap

VROOM

6:20 PM

Also, winters here are insane man

little car like that would get stuck everywhere

I'm in MTL

Moncton

the car has a computer that kicks ass in snow and ice

just google moncton snow

I was driving out into Rigaud with it in the winter, handled it fine

6:21 PM

user image

hahah :D

this was last winter, the banks are where the city dumps from main street

last winter was the worst winter we have ever had though

kinda have a feeling it isn't goign to get better

Proves no global warming

hahahah

4WD

Subaru Impreza AWD

6:22 PM

does the fiat run on AWD?

get one of those

yeah i checked out the WRX, then I told myself i was an adult.

the fiat is FWD I think

I drove into some deep snow at one point, and it did pretty well

I'm used to a 390HP Hemi

the traction control thing works quite well

hahah neato

6:23 PM

sucks to go down

like, test driving 200hp cars, and i'm like... MEH...

Oh

I said Explorer, I mean Escape btw

They make this little Escape thing, with a 220HP 2.0L engine that does 10L/100km

I miss 2007. Remember when bloom was a big deal and it was everywhere? Those were the days.

3

7:03 PM

@Honeybunch Bloom?

user image

user image

too little bloom

needs more bloom

:D

ok I got more Bloom for you

vignette3.wikia.nocookie.net/nickelodeon/images/9/92/…

thanks

any time :)

back

7:13 PM

> NRUB'YIGLITH, SHAMEBEAST KING OF GROTESQUERY, WRITHE-LORD OF THE MOIST BEYONDHOOD. Hearing his melodious chirps and tongue-clicks causes one's bones to explode.

Great villain for a video game :P

:D

vignette1.wikia.nocookie.net/winx/images/0/0d/My_bloom.jpg/…

@Almo That doesn't look like an overused post-processing effect to me

It's definitely "Bloom" though.

7:40 PM

user image

@Almo you draw that?

hahah no

that's "Bloom" a character from Winx

oh

someone talked about the bloom visual effect in games earlier

so I started posting pictures of Bloom

even though it's an odd drawing, I'd be happy if I could draw that well

user image

wayne barlowe. a great fantasy painter.

quite the inspiration.

Did a work depicting the inferno that is amazing.

8:00 PM

another inspiration of mine and a great artist: beksinski.pl

I quite like some of Pete Mohrbacher's work.

whoa thanks for that.

:)

I like how the titles were taken from the Kabbalah.

@Lokkij wow freaky

8:10 PM

Definitely a bit freaky, yeah

Awesome, Amplitude is going so well, HMX is putting more money into it, delaying it 6 months and adding more stuff!

I would like to incorporate the black mass in some of my works. make a scary game.

Rocket LEague's new leaver buster is harsh

games last about 6-7 minutes

first player to leave a ranked game is banned from the matchmaker for 15 minutes

good move, in my opinion

Yeah that sounds good

played 3v3 today with friends at work

all on voice chat (both teams together)

was great fun

8:21 PM

Cobalt looks like a lot of fun to play. watched a video on it recently.

8:45 PM

Hey guys! Can you rate/ give your opinion about my ice cream pixel art sprites?

user image

I love how all of your art is always happy :D

they are great

i hope someday you produce a full video game with total "cute" style.

I agree

thx guys :D

interesting article: gizmodo.com/…

8:52 PM

Lol I had this phone when i was in 3rd grade

user image

Then one day it fell out of my pocket on the bus :P

:(

nokia had a trend phone everyone had. then there was the iPhone.

beeper motorola

smart watches now

amusing to observe market trends

@TheMuffinCoder Did the bus break?

Since that day, the bus has never been found, legend has it that the nokia phone became hungry and ate the entire bus

Haha :P

@Tyyppi_77 Congratz on solving the equation :)

I had one of those Nokias when I was in 3'rd grade:

user image

user92578

9:07 PM

Ty

Hated the damn thing so much we played baseball with it.. It didn't even break :(

I had Sony CM-DX 1000 (in high school)

yes, I'm old as dirt

NO COLOUR DISPLAY?! shudders

later I upgraded to:

user image

@Tyyppi_77 You're welcome

9:09 PM

that thing was as tough as 3310, with a 3D scrollable menu

9:40 PM

eyo (again)

:P

10:36 PM

user image

11:08 PM

Future Holograms - Valentine

@ShenRuki Nice beat

thanks

11:33 PM

Shen

whatcha making?

Today was the first day I used Github, never used git or anything before :D

I bought a fucken car today, lol

Git <3

Made a page for my repository

themuffincoder.github.io/Ice-Cream-Complication

Can u guys see it?

@Jon the tiguan?

11:34 PM

ford escape

@TheMuffinCoder I see "hello github"

@Jon oh cool, how is it?

:D yay it works

@Jon is it shiny?

its pretty nice

Shininess is all that matters

i got the 240hp edition :)

11:35 PM

user image

Seems pretty cool to me :P

thats not it

lol i had the wrong paste is this one it?

yep, black

its pretty decent

i'm used to so much more power though, haha

lol

what happened to the old car?

trade in

11:44 PM

@TheMuffinCoder Your link is invalid

@Hjorthenify my github one?!?!?!

Or the car image

Github

It's all black

and I can't visit: themuffincoder.github.io

themuffincoder.github.io/Ice-Cream-Complication

There's more to the link :P u only had up .io

@TheMuffinCoder Remove the ':D's from your code

+ its suppose to be black =^.^=

@Honeybunch lol where

11:47 PM

<meta content="TheLastPastry - Explore generated worlds as a pastry :D" name="description">

lol i even had the wrong title

xD i copied my index file from a previous project

Also

inline JS is a big no-no

don't do that

???? inline js

^ do whatever is fastest to get it working, fix it after

wait nvm

11:50 PM

javascript on the page, not in a file

Firebug was being cool

Lol i dont have any inline js

and showing me the contents of your JS inline, it's in a separate file

you're good nvm

thx :D

any other tips Honeybunch?

@TheMuffinCoder Ah I was trying to see what else you had by accessing the root

11:51 PM

xD

Just make sure you use IIFEs to make sure you don't leak globals

that's as far as my basic JS wisdom goes

Yep :D i'm using typescript to help out with that

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