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[Gatleos]

It's actually pretty realistic to have lone smaller peaks near areas of solid mountain.

Yeah, and mountains in the real world transition gradually (usually). By necessity I have an instant color switch. I can talk all I want about trying to make the mountain ranges "realistic", but it's obvious I just want them to look good.

I'll probably just have to deal with it; a more pressing problem is determining how to render these maps in-game. That whole hex grid is just a set of vertices with texture coordinates being piped through opengl each render pass, so determining what they will be rendered as is important to establish beforehand. What you see in those screenshots is a single white hex graphic drawn over and over, with colors applied to the 4 vertices of each one.

I was planning on using a sprite for each terrain type, but this color gradient looks too good to pass up. The problem is that it's difficult to add any detail to the tiles when they're being tinted, since the color is subtracted from the original sprite.

[miauw62]

Compile a single executable that just starts cata with that option?

[Orange Wizard]

Here's you guys with your fancy terrain generation, and here's me with weird ASCII splodges.

Spoiler (click to show/hide)

[HavingPhun]

Here's you guys with your fancy terrain generation, and here's me with weird ASCII splodges.

Spoiler (click to show/hide)

I planned on displaying it with ascii characters once I am happy with it, it's just easier for me to visualize the map this way  . I can see the whole thing without panning around, and can fit multiple maps on a screen at once this way.

[alway]

So, I'm working on some graphics tutorials with some folks, generally using C++ with OpenGL or OpenGL-like stuff. Intention being minimal explanation outside the code itself, using simple, understandable coding style to do so.

Question: what is the most confusing part of this code? Or in general, what would most keep you from arbitrarily modifying it into something with similar code but different results? https://github.com/jalway/tut0

[TheDarkStar]

I'm looking at wxWidgets for the first time (FOSS C++ application framework). Is there anything that I should keep in mind while using it?

[i2amroy]

-And solved, finally managed to track down the answer-

[HavingPhun]

There are still many things that I do not understand. Currently I am trying to create a function that can determine each individual region of the world in my world generator. For example, it would be able to tell one lake, forest, or mountain from each other. The specific method of achieving this isn't what I am asking about, I did some brainstorming and I think I am going to do some sort of flood fill approach to determine which regions are which.

To do this, I will have a vector that contains the region classes. The part of code that causes problems is this:

Code: [Select]


//check if current tile is part of existing region, if not create new region and add it to the region vector.

NaturalRegionContainer.push_back(new NaturalRegion); //create new object of the NaturalRegion class.

Now, let me explain some of my thoughts behind this. I cannot know how many regions I will have because the map is randomly generated, so I used a vector as the container. For the same reason, I attempted to create a new region the way I did. I figured this method would be much easier, since this way I would not have to individually name each region by myself in the code. When building I get the error "Undefined reference to NaturalRegion".

So, how exactly could I create a new object of a class on demand and add it to a vector, without knowing how many regions I will have until runtime?

[Reelya]

"Undefined xyz" means that the cpp module doesn't have access to the definition of the "xyz" class or function. It means that you need an #include to link the class definition from somewhere. modules only know about the existence of code on their #include path, so you have to explicitly set this up. Generally the best solution is a strict "need to know" basis, so i avoid letting .h files have other includes in them whenever possible. put all your #includes at the cpp level then you can see clearly which modules are using which headers.

[HavingPhun]

"Undefined xyz" means that the cpp module doesn't have access to the definition of the "xyz" class or function. It means that you need an #include to link the class definition from somewhere. modules only know about the existence of code on their #include path, so you have to explicitly set this up. Generally the best solution is a strict "need to know" basis, so i avoid letting .h files have other includes in them whenever possible. put all your #includes at the cpp level then you can see clearly which modules are using which headers.

Hmm, odd. I have the definition of NatureRegion in GameMap.h. The function mentioned is within GameMap.cpp, which includes GameMap.h. I'll try sticking the class in its own header though. Also, should the above code work, how I wished it to function?

[Reelya]

you shouldn't need a separate .h file. you just need to ensure that natureRegion is properly on the #include path wherever it's used.

But i notice that you're saying both "NaturalRegion" and "NatureRegion", so check spelling.

I find namespaces can make errors more informative. if you had:

namespace gameMap
{
   // .h stuff 
   class NaturalRegion;
}

and refer to it as gameMap::NaturalRegion, then you get the error instead "gameMap does not include a definition of "NatureRegion", which is more informative than just "undefined".

[HavingPhun]

The GameMap.cpp is something like 2000 lines so I'm just putting the function involved, unless you want it's entirety. It's currently incomplete, I decided not to do anything extensive until I had this sorted out.

GameMap.h

Spoiler (click to show/hide)

Code: [Select]

#include GameMap.cpp

void GameMap::CalculateMapRegions(bool DebugMessages)
{
    //0 = nothing
    //1 = tundra
    //2 = snow
    //3 = desert
    //4 = grassland
    //5 = decidous forest
    //6 = marshland / swamp
    //7 = tropical deciduous
    //8 = tropical rainforest
    //9 = bare
    //10 = scorched
    //11 = water

    int GridX;
    int GridY;

    int XLimit = x - 1;
    int YLimit = y - 1;

    std::queue <CartesianCoordinate*> CoordinateQueue;

    bool exit = 0;

    int CurrentBiome;
    int TempArrayPos;
    int CurrentRegion = 1;

    while(exit == 0)
    {
        TempArrayPos = ConvertToAbsolute(GridX, GridY);
        CurrentBiome = data[TempArrayPos].Biome;

        bool exit2 = 0;
        int InitialX = GridX;
        int InitialY = GridY;

        int GridX2 = InitialX;
        int GridY2 = InitialY;

        int TempArrayPos2;

        NatureRegions.push_back(new NatureRegion);

        while(exit2 == 0)
        {
            TempArrayPos2 = ConvertToAbsolute(GridX2, GridY2);



            CoordinateQueue.push(new CartesianCoordinate(GridX2, GridY2));
        }

    }
}





GameMap.cpp

Spoiler (click to show/hide)

Code: [Select]

class NatureRegion
{
public:
    NatureRegion();
    ~NatureRegion();

    int CenterX;
    int CenterY;

    std::vector <CartesianCoordinate*> ContainedCoordinates;

    CartesianCoordinate* operator[](int arraypos)
    {
        return ContainedCoordinates[arraypos];
    }

};

//GameMap class would be below, the CartesianCoordinate class is also below.


That should be everything. I also tried separating them into different files, and that did nothing, as you had said.

Edit: This is the error that is thrown.

Code: [Select]

Release\obj\GameMap.o:GameMap.cpp:(.text+0x6323): undefined reference to `NatureRegion::NatureRegion()'


But i notice that you're saying both "NaturalRegion" and "NatureRegion", so check spelling.

Oh, sorry for the confusion. It seems I just did that in the pseudo code.

I find namespaces can make errors more informative. if you had:

namespace gameMap
{
   // .h stuff 
   class NaturalRegion;
}

and refer to it as gameMap::NaturalRegion, then you get the error instead "gameMap does not include a definition of "NatureRegion", which is more informative than just "undefined".

Just to be sure. You can have multiple classes in a namespace, correct?

[Orange Wizard]

2000 lines

How much stuff is handled in that file?

[TheDarkStar]

I'm looking at wxWidgets for the first time (FOSS C++ application framework). Is there anything that I should keep in mind while using it?

Following up on this, I've spent 3-4 hours trying to get this to work. It's my first time installing a library and the documentation for doing this is rather lacking. Tutorials on the same wiki are for arbitrary versions and pick random problems to provide help for. Some of them assume that a reader has extensive knowledge of the subject already. I've googled several different things relating to problems, and I think I've solved most of them.

The error that I'm getting right now is essentially "ld.exe cannot find -lwxmsw30u". I'm using code::blocks and I've already looked through the wxWidgets files to see if a file similar to "lwxmsw30u" exists (but I didn't find it anywhere). Does anyone have any help to offer?

[HavingPhun]

2000 lines

How much stuff is handled in that file?

Well, it has all the stuff for world generation, including the temperature, moisture, and biome functions. But really it could do with some pruning, there are a few functions that I don't even use anymore.

Also, Reelya, I added the namespace, and now it just says this for an error:

Code: [Select]

Release\obj\GameMap.o:GameMap.cpp:(.text+0x6323): undefined reference to `MapSystem::NatureRegion::NatureRegion()'

So, I am guessing that there is something wrong with this line, without it there is no error:

Code: [Select]

NatureRegions.push_back(new NatureRegion);
Just to note, NatureRegions is the vector containing the regions, it could probably use a better name. I'm not yet, quite sure of any other ways to do what I want that line to do.