What do you need help with? Version 5

[robmaister12]

[QUOTE=ThePuska;38301662]I'm testing out Visual Studio 2012, for C# specifically.

Can someone tell me if it's possible to have some references and other files in the project dependent on your solution platform? I need to reference different DLLs on x86 and x64, and copy different DLLs to the output folder depending on the platform. It'd be nice to automate this.[/QUOTE]

You can edit the .csproj file and throw the Condition attribute on pretty much any tag:

Condition=" '$(Platform)' == 'x86' "

[Chezburger]

Hi, I just wonderd, is function prototyping a bad habit?

I keep thinking it is bad, because I noticed it slows down the code a bit.

[ThePuska]

It's not a bad practice. What language are you using? I don't think it'd have a noticeable effect in any language, much less a negative effect!

[Lord Fear]

I'm fairly sure modern compliers will optimize it so it won't make a difference if you prototype or not.

[Cesar Augusto]

With the same problem :(

[Meatpuppet]

Need some help with sine waves.

Here is my drawing function so far:

[cpp](x and y were initialized to 0)
for(int n=0; n<75; n++)
{
y = (sin(x) * 10) + 715;
D3DXVECTOR3 pos(x, y, 0);
spriteobj->Draw(square, NULL, NULL, &pos, D3DCOLOR_XRGB(255, 255, 255));
x += 16;
}[/cpp]

Now, that gets me this:

[IMG]http://i.imgur.com/UdFsI.png[/IMG]

I know that sin(16) gives a negative value, so that's why every other square is acting weird.
I tried to abs() the sin function, so it wouldn't give negative values, but...

[IMG]http://i.imgur.com/Q1pkV.png[/IMG]

That doesn't look quite right... if I'm just seeing things and this is right, just tell me.

Can someone tell me how to draw the cubes in a regular sine function, no oddities?

[dajoh]

[QUOTE=Number-41;38299835]And is there some comprehensive tutorial that explains each of these components?

[URL="http://www.cprogramming.com/tutorial/opengl_first_windows_app.html"]This one[/URL] is a bit brief...[/QUOTE]

[url]http://www.winprog.org/tutorial/[/url]

[MakeR]

[QUOTE=Meatpuppet;38303335]Can someone tell me how to draw the cubes in a regular sine function, no oddities?[/QUOTE]

sin takes an angle in radians, 16 radians is ~916 degrees.

[robmaister12]

Instead of drawing large squares on the screen, try creating a texture where every pixel is (sin(x) * cos(y)) or something like that, then test it by drawing that texture as a fullscreen quad.

Just make the texture a float[][] and start filling it in..

[Meatpuppet]

[QUOTE=robmaister12;38303577]Instead of drawing large squares on the screen, try creating a texture where every pixel is (sin(x) * cos(y)) or something like that, then test it by drawing that texture as a fullscreen quad.

Just make the texture a float[][] and start filling it in..[/QUOTE]
I'm not quite sure what you mean.

[editline]3rd November 2012[/editline]

[QUOTE=MakeR;38303553]sin takes an angle in radians, 16 radians is ~916 degrees.[/QUOTE]

So I need to convert sin(x) to rads?

[editline]3rd November 2012[/editline]

Woo, converting it to radians worked! :D Thanks!

If anyone wants to know:
[cpp] for(int n=0; n<75; n++)
{
y = ((sin(x*2) * (3.14159 / 180)) * 500) + 715;
D3DXVECTOR3 pos(x, y, 0);
spriteobj->Draw(square, NULL, NULL, &pos, D3DCOLOR_XRGB(255, 255, 255));
x += 16;
}[/cpp]
[img]http://i.imgur.com/AxUTq.png[/img]

[MakeR]

[QUOTE=Meatpuppet;38303642]So I need to convert sin(x) to rads?[/QUOTE]

I'm assuming you don't want each square to be 916 degrees ahead of the last, so you should convert x to radians then sin it.

[Meatpuppet]

-snip-

[MakeR]

[QUOTE=Meatpuppet;38303642]Woo, converting it to radians worked! :D Thanks![/QUOTE]

That isn't actually correct, although it is displaying a sine wave. You should convert x to radians before you sine it.

[Meatpuppet]

[QUOTE=MakeR;38303723]That isn't actually correct, although it is displaying a sine wave. You should convert x to radians before you sine it.[/QUOTE]

Ok, I'll do that.

[editline]3rd November 2012[/editline]

It's only drawing one square.
[cpp] for(int n=0; n<75; n++)
{
x *= 3.14159/180;
y = (sin(x) * 10) + 715;
D3DXVECTOR3 pos(x, y, 0);
spriteobj->Draw(square, NULL, NULL, &pos, D3DCOLOR_XRGB(255, 255, 255));
x += 16;
}[/cpp]

[editline]3rd November 2012[/editline]

Also, I need some help. I don't know how to I don't know how to[quote]- Use perlin noise to generate a 2D array of height data (2D array = image). If you looked at this image, it'd be a top-down map of terrain height. Lower values mean low terrain. Higher values mean high terrain. (of course, you could flip this).[/quote]

I don't understand how to make an array like that. I'm looking at [url=http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise-math-faq.html#toc-algorithm]this[/url], but I'm really dumb and don't know how to make all of that into a function in C++.

[robmaister12]

[QUOTE=Meatpuppet;38303642]I'm not quite sure what you mean.[/QUOTE]

I'm talking about where you should go next. Generate an image outside of DirectX and use it as a texture:

float[][] terrain = new float[512][512];
for (int i = 0; i < 512; i++)
{
    for (int j = 0; j < 512; j++)
    {
        terrain[i][j] = sin(i) * cos(j);
    }
}

//import as directX texture

//draw fullscreen quad with texture to test

[Meatpuppet]

How do you import an array as a texture?

[MakeR]

[QUOTE=Meatpuppet;38303782]It's only drawing one square.
[cpp] for(int n=0; n<75; n++)
{
x *= 3.14159/180;
y = (sin(x) * 10) + 715;
D3DXVECTOR3 pos(x, y, 0);
spriteobj->Draw(square, NULL, NULL, &pos, D3DCOLOR_XRGB(255, 255, 255));
x += 16;
}[/cpp][/QUOTE]

Don't change the x variable, just convert it in the call to sin.

[cpp]y = 10*sin(x*3.14159/180) + 715;[/cpp]

[Meatpuppet]

Oh, duh, haha. Thanks!

[robmaister12]

[QUOTE=Meatpuppet;38303902]How do you import an array as a texture?[/QUOTE]

How do you regularly import textures? I only know OpenGL and glTexImage2D takes an array of values as pixels.

So essentially you take the float[][] and pass it into the equivalent DirectX method, you may have to convert it to a byte[][] first, depending on what it can accept. Just look it up, it's fairly standard stuff...

[Meatpuppet]

[QUOTE=robmaister12;38304114]How do you regularly import textures? I only know OpenGL and glTexImage2D takes an array of values as pixels.

So essentially you take the float[][] and pass it into the equivalent DirectX method, you may have to convert it to a byte[][] first, depending on what it can accept. Just look it up, it's fairly standard stuff...[/QUOTE]
This is how I define textures in DirectX:
[cpp]

LPDIRECT3DTEXTURE9 square = NULL;[/cpp]

Then in Game_Init:[cpp]

square = LoadTexture("square.bmp");
if(!square) return false;[/cpp]

So, you're saying to do this?[cpp]

float[][] terrain = new float[512][512];
for (int i = 0; i < 512; i++)
{
for (int j = 0; j < 512; j++)
{
terrain[i][j] = sin(i) * cos(j);
}
}
LPD3DTEXURE9[][] terrain[/cpp]

[editline]3rd November 2012[/editline]

Fucking facepunch.

[robmaister12]

[QUOTE=Meatpuppet;38304158]This is how I define textures in DirectX:
[cpp]

LPDIRECT3DTEXTURE9 square = NULL;[/cpp]

Then in Game_Init:[cpp]

square = LoadTexture("square.bmp");
if(!square) return false;[/cpp]

So, you're saying to do this?[cpp]

float[][] terrain = new float[512][512];
for (int i = 0; i < 512; i++)
{
for (int j = 0; j < 512; j++)
{
terrain[i][j] = sin(i) * cos(j);
}
}
LPD3DTEXURE9[][] terrain[/cpp]

[editline]3rd November 2012[/editline]

Fucking facepunch.[/QUOTE]

What's the contents of LoadTexture()? Instead of passing the path to a file, you should also accept a byte[][] of pixels, since it's just reading out a byte[][] from the .bmp file.

You want to generate a single primitive that has a texture of size 512x512, not 262,144 primitives.

[thrawn2787]

anyone know if the semaphores in semaphore.h are FIFO or not?

[Meatpuppet]

[QUOTE=robmaister12;38304278]What's the contents of LoadTexture()? Instead of passing the path to a file, you should also accept a byte[][] of pixels, since it's just reading out a byte[][] from the .bmp file.

You want to generate a single primitive that has a texture of size 512x512, not 262,144 primitives.[/QUOTE]

Here is loadtexture()
[cpp]LPDIRECT3DTEXTURE9 LoadTexture(std::string filename, D3DCOLOR transcolor)
{
LPDIRECT3DTEXTURE9 texture = NULL;

//get width and height from bitmap file
D3DXIMAGE_INFO info;
HRESULT result = D3DXGetImageInfoFromFile(filename.c_str(), &info);
if (result != D3D_OK) return NULL;

//create the new texture by loading a bitmap image file
D3DXCreateTextureFromFileEx(
d3ddev, //Direct3D device object
filename.c_str(), //bitmap filename
info.Width, //bitmap image width
info.Height, //bitmap image height
1, //mip-map levels (1 for no chain)
D3DPOOL_DEFAULT, //the type of surface (standard)
D3DFMT_UNKNOWN, //surface format (default)
D3DPOOL_DEFAULT, //memory class for the texture
D3DX_DEFAULT, //image filter
D3DX_DEFAULT, //mip filter
transcolor, //color key for transparency
&info, //bitmap file info (from loaded file)
NULL, //color palette
&texture ); //destination texture

//make sure the bitmap textre was loaded correctly
if (result != D3D_OK) return NULL;

return texture;
}

[/cpp]

I can't figure out a way for it to accept a byte[][], because the function I'm using is just based off of a filename. I can't find a DX function for reading out a byte[][].

[ThePuska]

[QUOTE=thrawn2787;38304490]anyone know if the semaphores in semaphore.h are FIFO or not?[/QUOTE]

They're not.

edit: The order is practically random, whatever thread happens to be in the scheduler's favour when the semaphore is released gets it

[Philly c]

[URL="http://msdn.microsoft.com/en-gb/library/windows/desktop/bb174363(v=vs.85).aspx"]Create[/URL]
[URL="http://msdn.microsoft.com/en-gb/library/windows/desktop/bb205913(v=vs.85).aspx"]lock[/URL]
Copy texture data.
[URL="http://msdn.microsoft.com/en-gb/library/windows/desktop/bb205914(v=vs.85).aspx"]unlock[/URL]

Haven't used d3d9 myself but it is similar to d3d11 without being able to initialize a texture with the data.

[Meatpuppet]

I'm using d3d9

[robmaister12]

After like 2 minutes of googling: [url]http://msdn.microsoft.com/en-us/library/windows/desktop/bb172804(v=vs.85).aspx[/url]

[editline]3rd November 2012[/editline]

dayum, you guys are fast!

[Meatpuppet]

Also, how does that enable me to input an array of bytes to get a texture?

[editline]3rd November 2012[/editline]

I googled "Creating a texture from a byte array" and nothing came up.

[robmaister12]

[QUOTE=Meatpuppet;38304759]Also, how does that enable me to input an array of bytes to get a texture?

[editline]3rd November 2012[/editline]

I googled "Creating a texture from a byte array" and nothing came up.[/QUOTE]

Textures are just arrays of color values, most commonly 3 or 4 bytes per pixel, RGB or RGBA, but you can specify other formats.

The pSrcData parameter is basically just a void*, meaning you can pass in any sort of pointer or array as long as you specify the size in pSrcDataSize.

[Meatpuppet]

Can I have an example of the function being used?