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by rozick1
Eigen library - references
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Hello I am using the Eigen library. I have a 4x3 matrix of doubles and would like to obtain a reference to a row or column of the matrix (so that changes to t... |
Apr 29, 2023 at 11:10pm
[4 replies] Last: See the documentation about working with block matrices: https://eigen... (by mbozzi)
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by JUANDENT
akgorithm to order modules according to dependencies
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Hi, i have a program that reads module interface units and stores each module's dependencies, like this pseudo code: module A, imports B,C,D module B, imports... |
Apr 27, 2023 at 9:01pm
[2 replies] Last: The relevant search term is "topological sorting" You could do someth... (by mbozzi)
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by Weasel
undefined reference
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Hello, I've been reading Professional C++ by Marc Gregoire and I'm having problems with some of his code. Here is the code of three files I have taken fro... |
Apr 25, 2023 at 4:32pm
[2 replies] Last: Keep in mind that the header file ( .h ) only contains the declaratio... (by kigar64551)
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by seeker62
dbase
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Does c++ have a dbase lib that will be there out of the box? I am trying to use SGLAPI without any success. Am also using code::blocks without much success. |
Apr 25, 2023 at 5:22am
[5 replies] Last: In addition to the include path you need also the library. See this: ... (by coder777)
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by cgm2k7
Sprite sheet animation calculation
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Good afternoon! I'm creating a small 2d game in directx11, I'm trying to animate the sprites. See my doubt: I have a sprite sheet with 18 frames, 3 rows with... |
Apr 23, 2023 at 12:51pm
[2 replies] Last: I already managed to solve. m_vertices .uv.x = (currentFrame ... (by cgm2k7)
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by seeplus
Random probability
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I have this pseudo-code (NOT c c/++) k = 0 b = 0 for i = 1 to 64 r = rnd() if r > .96 then b = b + 1 if r > .98 then k = k + 3 else if r... |
Apr 19, 2023 at 8:32pm
[4 replies] Last: Actually, it can be done using the multinomial distribution - see http... (by lastchance)
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by malibor
Scaling a variable by percentage forth and back
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Hello guys, even though this is about windows programing, my problem is actually math in relation to DPI aware program, so I'm posting here rather than in windo... |
Apr 19, 2023 at 1:27pm
[4 replies] Last: You're right, I gave up from scaling and will continue to use variable... (by malibor)
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by JUANDENT
unmangling C++ unresolved external
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Hi, I have a project that upon compiling gives me an unresolved external error with a monstrous name mangling (using VS2022 Preview 17.6 Preview 3 Is ther... |
Apr 18, 2023 at 10:18pm
[3 replies] Last: the method in error seems to be sync_table correct? correct... (by kbw)
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by tigerlcf
Force this C++ Programs to use Windows Console Host NOT default Windows Terminal
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I have some programs that require MANY changes to use Windows Terminal mode of of console display. Is there a way to force my programs to use the OLD cmd.exe (... |
Apr 18, 2023 at 1:52am
[3 replies] Last: Thanks I tried your way (conhost.exe cmd.exe) and it works calling cm... (by tigerlcf)
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by frek
Assign to a specific memory address
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Suppose some address like 0x25D4C3FA is available on my memory. I want to assign to that address. One way that firstly comes to mind is like: int* p = (int*) ... |
Apr 17, 2023 at 1:08pm
[16 replies] Last: Thanks for the link. Do you have a platform-independent link to sugge... (by kigar64551)
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by helios
resvg
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https://github.com/RazrFalcon/resvg Finally, an SVG rendering library that's actually usable on Windows. It builds in seconds and the code to render looks like... |
Apr 16, 2023 at 10:39pm
[no replies]
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by JUANDENT
unresolved external from library containing many templates and many C++20 modules!
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Hi, I have a library composed of many C++20 modules and when I link with it in an executable I get unresolved external...why? I am using VS2022 latest Pre... |
Apr 16, 2023 at 2:21am
[1 reply] : Not enough information in your post to give you a meaningful response.... (by AbstractionAnon)
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by JUANDENT
class template has already been defined!!
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Hi, I have a static library made up of many C++20 modules and many of them #include <system_error> in the section between module and export module, like this: ... |
Apr 15, 2023 at 6:05pm
[no replies]
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by jonnin
little help playing with concept and templates
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I have this toy that is trying to conditionally inherit different base classes to change the behavior of get value. That may not be the best plan here anyway(o... |
Apr 14, 2023 at 6:28pm
[5 replies] Last: thx again! (by jonnin)
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by JamieAl
Optimization using OpenMP: Parallel code is slow
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I have a made a post in the past about optimization and parallelization where I got lots of help and feedback. I am attempting to use openMP with FFTW library a... |
Apr 14, 2023 at 2:34am
[12 replies] Last: But if I run with openMP and FFTW following the instructions: https://... (by JamieAl)
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by marhuum
vector multi template argument
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what multi template argument in vector seen eg. std::vector<_Tp, _Alloc>::reference |
Apr 13, 2023 at 5:11pm
[1 reply] : https://cplusplus.com/reference/vector/vector/ _Tp is the data type o... (by doug4)
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by JUANDENT
Is it possible to access a non exported item from another translation unit?
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I have a definition of a function called Mem() inside a C++ 20 module but not exported. I need to access Mem() from another translation unit in the project. Is ... |
Apr 10, 2023 at 5:08pm
[no replies]
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by Cplusc
Octree data structure method
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Can anyone tell my why I'm getting out of subscription error for blockIndices? This code reads the triangulation of the surface of a volume and uses Octree meth... |
Apr 8, 2023 at 2:14am
[3 replies] Last: ok, and what does it do in generate hex mesh? you just say main doesn... (by jonnin)
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by JUANDENT
how to get local hh_mm_ss for current local time?
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Hi, I need a local now point that will give me current time zone values. For instance if i am in Kansas, the local time would be the value of GMT-6. Using sy... |
Apr 6, 2023 at 6:29am
[2 replies] Last: // C++20 #include <iostream> #include <chrono> int main() { // ... (by JLBorges)
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equal_range question |
I'm using a multimap to store a collection of PLAY objects. The multimap entries consist of a score (int) and a copy of the PLAY object. I'm stuck in two pl... |
Apr 5, 2023 at 9:33am
[3 replies] Last: Consider something like this - where the map is sorted descending rath... (by seeplus)
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