Game Development

1:13 AM

@JesseDorsey @Josh has reversed the trend :P

Hey, I've always been reverse-pro

haha

3:12 PM

cmake is giving me an error with this code: pastebin.com/Sf4j25cd

Configuring done
CMake Error at CMakeLists.txt:51 (add_executable):
  Cannot find source file:

    Sandbox.cpp

  Tried extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm
  .hpp .hxx .in .txx


CMake Error at CMakeLists.txt:51 (add_executable):
  No SOURCES given to target: Sandbox

my dir structure is :

- CmakeLists.txt
- src
  - gl
  - vk
  - blabla
- lib
  - dlls
    - bar.dll
  - foo.lib
- Sanbox.cpp

Oh wait

it's so dumb ahahah

I've just realized that I wrote "Sanbox" instead of "Sandbox"

:D

Oopsie :D

Pikalek

Behold the power of the rubber duck.

sometimes error messages really are useful.

sometimes it's hard to tell when :)

I should have gone with an easier name ahahahah :)

user4704

3:23 PM

You're still doing a lot of set() calls you really should not do.

user4704

All that set(CMAKE_CXX_STANDARD) and such, you should do that with target properties via set_target_properties

user4704

Any time you find yourself calling set() with a name that starts with CMAKE, look for a target-specific option instead.

user4704

You can also specify multiple items for most commands, like target_link_libraries:

user4704

target_link_libraries(Omge glfw3.lib irrKlang.lib vulkan-1.lib)

ah yeah

I haven't tried to do that yet

Do you find something else that doesn't look right?

user4704

3:26 PM

The set() for the archive paths, etc.

user4704

And the use of relative paths to specify the library names versus using find_package() or similar to locate them

which version of cmake should i use though? there are so many..

user4704

You should have the latest version installed.

user4704

You should specify in your lists the oldest version that you can

user4704

But I wouldn't go back beyond 3

3:30 PM

like the minimum requirements?

user4704

Yeah, in cmake_minimum_required you should start with 3.0

user4704

And then bump it up when you find a command you want to use that requires a higher version

3:44 PM

updated code: pastebin.com/VhT3CUpy

1>------ Build started: Project: ZERO_CHECK, Configuration: Debug Win32 ------
1>Checking Build System
1>CMake does not need to re-run because C:/Users/Gabriele/Desktop/build/CMakeFiles/generate.stamp is up-to-date.
2>------ Build started: Project: Omge, Configuration: Debug Win32 ------
2>Building Custom Rule C:/Users/Gabriele/Documents/Github/OMGE/Engine/CMakeLists.txt
2>CMake does not need to re-run because C:/Users/Gabriele/Desktop/build/CMakeFiles/generate.stamp is up-to-date.
2>OGLApplication.cpp

why is there a "glfw3.lib.lib"?

user4704

Because you said to link "glfw3.lib" and cmake appended .lib because that's the standard extension for static libraries on Windows.

user4704

Since cmake is design to be run in both cross-platform contexts, and contexts where you can swap some targets between static and shared, you don't generally want to specify the extensions of libraries

user4704

This is also why you should be using e.g., find_package() to look up the libraries you want

user4704

Although that can be complex to set up. For now I'd just remove the extension from the library names

but that doesn't seem to be happening with the others

user4704

3:51 PM

Right. Because cmake generated that file

user4704

yes it is

user4704

irklang.lib.lib is in there

oh yeah

why am I so blind today

:D

user4704

the only one without it is Omge, which you specified as target_link_libraries(... Omge)

user4704

(which is correct)

3:53 PM

can i specify the stuff in the set_property functions in one line too?

user4704

No, set_property() only sets one property (but that property can have multiple values, so you can do that)

user4704

set_target_properties can set multiple properties in one call though.

like set_target_properties(p1, p2, p3, VALUES v1, v2, v3) ? (pseudo code)

user4704

No. Look at the documentation for the function.

user4704

"cmake <function name>" into any reasonable search engine will almost always link you the proper page

4:03 PM

so set_target_properties sets one property for one target?

user4704

set_target_properties sets N properties for N targets.

user4704

set_target_properties(MyTarget PROPERTIES property1 value1 property2 value2) etc

oh okay

that's convenient :)

user4704

set_target_properties(target1 target2 PROPERTIES property1 value1)

user4704

set_target_properties(target1 target2 PROPERTIES property1 value1 property2 value2)

user4704

4:07 PM

and so on

user4704

like the docs say cmake.org/cmake/help/v3.13/command/set_target_properties.html

how do you distinguis between property one and property two?

user4704

whitespace

user4704

the first thing after PROPERTIES is the name of the first property. The next thing, separated by whitespace, is the value of that property.

user4704

The next thing, separated by whitespace, is the name of the next property. etc

4:09 PM

I'm sorry, by that i meant to say "so the properties and values that you specify for tg1 and tg2 get set for both targets, right?"

user4704

Yes.

user4704

the properties you specify are set for all targets you specify

Okay.

In ten minutes in python I made what took me around 3 days to make in C :/

user4704

Unsurprising, really.

user92578

4:23 PM

Especially IIRC you are really new to C?

I've done around 12 hours lesson on it

just if I want to have the first letter of a string in python:

a="d"
print(a[0])

but c lol the strings are hard

user92578

not in that use case

oh yeah char

but y'know

user92578

const char a[] = "d"; printf(a[0]);

yep

lists are also simpler

I do like c's for loops however

user92578

4:28 PM

most stuff in C is a pain

user92578

you might want to look into C++

Q: Use a different language for engine and game

5:12 PM

scanf ARGH

fscanf AARRGGHH

@AlexandreVaillancourt how should we handle this

0

Just a quick question that I haven't been able to find an answer to, I am creating an engine for a game, I have begin making the engine in C++ but I want to make the game in java. My question is, is there a way to maker my game in a different language on a separate "layer"?

it's got an answer link to SO in the comments

user4704

5:27 PM

I just made an answer based on the some stuff in the link and a few quick tutorial googles

awesome

5:58 PM

:)

pastebin.com/hxUPA4H5

there is a problem with the relative paths of the libraries

apparently visual studio can't link them to the sandbox project. Am I doing something wrong?

I have 2 input values that are used to generate 2 output values. I want to find the 2 input values that would be the closest to 2 precise output values. I think it would be easy to do that with mathlab, but I don't have access to it. Any other options?

wolfram alpha?

that's really a question

i have no idea if it would help

what is the function?

or is it a black box

  const double suspensionErp = dt * wheelSpring / ( dt * wheelSpring + wheelDamping );
  const double suspensionCfm = 1.0              / ( dt * wheelSpring + wheelDamping );

@Almo I can give it a try..!

6:11 PM

:)

It has defaults for suspensionErp and suspensionCfm, and I'm trying to figure out what wheelSpring and wheelDamping I can give it to get the defaults.

(It being the physics engine that we use, i.e. ODE.)

can you not solve that equation for the other variables

we need a dark mode :D

@Jimmy Hmm, maybe if I wrote that down on paper I could get something better?

user4704

6:16 PM

@GabrieleVierti Specifying relative paths, probably

let W = 1 / suspensionCfm (this is your dt * spring + damping). then you have a target value for W, and w is also suspensionErp / (dt * wheelSpring)

so that gives you wheelSpring

user4704

@GabrieleVierti cmake.org/cmake/help/v3.0/command/find_library.html

@Jimmy I think I see where you're going. My brain is rusty for that kind of stuf.

stuff

@Josh I'll try that out, thanks a lot Josh.

@AlexandreVaillancourt here you go: ideone.com/SuRLLl

edit and fill in your numbers

bornander

6:38 PM

So.

La.

bornander

Anyone got any tips on how to get rid of peter panning without introducing self shading all over the place?

I don't know what "peter panning" is

bornander

When an item appears to be floating because the shadow it casts does not match up with the base of the item.

opengl-tutorial.org/intermediate-tutorials/…

I seem to trade one shadow artfact for another no matter what I try.

@Jimmy hey thanks!!

6:57 PM

@GabrieleVierti Heh I don't think it's on the top list of SE, but I guess you can hack browser extension that does this for you :P

@AlexandreVaillancourt that's exactly what i did hahahahah :D

@GabrieleVierti :)

The Mattbat999

8:34 PM

@PintOfMilk I spent months studying C, under Stratford Career Institute. 12 hours won't cut it to learn useful C.