Messages

Am I doing this right

first I create a window like

Code Select Expand


hWnd = CreateWindowEx(NULL, L"WindowClass", L"test",
                          WS_OVERLAPPED, 0, 0, 1024, 768,
                          NULL, NULL, hInstance, NULL);


Then I create device like

Code Select Expand


    d3d = Direct3DCreate9(D3D_SDK_VERSION);

    D3DPRESENT_PARAMETERS d3dpp;

    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = true;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.hDeviceWindow = hWnd;
    d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
    d3dpp.BackBufferWidth = 1024;
    d3dpp.BackBufferHeight = 768;

    d3d->CreateDevice(D3DADAPTER_DEFAULT,
                      D3DDEVTYPE_HAL,
                      hWnd,
                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                      &d3dpp,
                      &d3ddev);


And i have

Code Select Expand


D3DXMATRIX matRotateY;

static float index = 0.0f; index+=0.05f;
D3DXMatrixRotationY(&matRotateY, index);
d3ddev->SetTransform(D3DTS_WORLD, &matRotateY);

D3DXMATRIX matView;
D3DXMatrixLookAtLH(&matView,
                       &D3DXVECTOR3 (0.0f, 0.0f, 10.0f),
                       &D3DXVECTOR3 (0.0f, 0.0f, 0.0f),
                       &D3DXVECTOR3 (0.0f, 1.0f, 0.0f));
d3ddev->SetTransform(D3DTS_VIEW, &matView);

D3DXMATRIX matProjection;
D3DXMatrixPerspectiveFovLH(&matProjection,
                               D3DXToRadian(45),
                               589824.0f,                            //is this right?
                               1.0f,
                               100.0f);
d3ddev->SetTransform(D3DTS_PROJECTION, &matProjection);


How do I add black lines since they dont come automatically?

Mayby I can explain myselve a litte better. If I design a program to use a 1280x720 resolution (aspec ratio 16:9) but I give user an opportunity to run a program in 1024x768 (aspect ratio 4:3). I still want to forse users to use 16:9 aspect ratio in 1024x768 mode and i can do that by adding borders to tom and bottomm but how do I add them?

I dont understand source code of those examples since they are c# and vb and i would prefere c++ or c sample

but looking at those they wont still add black lines to top and bottom if I would scale window

How can I achieve letterboxing in directx so that my graphics wont get stretched with differet aspect ratios?

Whats wrong with dosbox i know it dosent run all the intros at the moment but its getting better and better all the time.
Personally I use a qemu with MSDOS-6.22 and Win98 installed and Ive been able to run most dos demos Ive tried and it dosent take even much resources about 14mb whitout virtual disk.

Ahh sorry for my previous post apparantly I have to modify value of position not center I dont really understand why center doesnt work but I got it working by modifying position.

BIG thanks to everybody who helped me throught this I wont forget you.

Yep I got i working

Code Select Expand


for(int x=0; x<5; x++)  // 5 times 5 is 25
{
for(int y=0; y<5; y++)
{
lockedarea[x+y * offset / 4] = 0x00000000;  // if I do this shouldnt this produce a square but instead it produces a line that is 25
}
}


But now Im noticed that Im having trouble with Z-Buffering. I use this code to draw tiles

Code Select Expand


D3DXVECTOR3 center(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 position(50.0f, 50.0f, 1.0f);
d3dspt->Draw(Texture1, NULL, &center, &position, D3DCOLOR_ARGB(alph, 255, 255, 255));


when i set Z value of position to anything non 0 my tile dosent apper

I have enabled and cleared Z-Buffer by

Code Select Expand


d3ddev->SetRenderState(D3DRS_ZENABLE, TRUE); //this one is in init function
d3ddev->Clear(0, NULL, D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0); // and this one in rendering function


Might the problem be that Im trying to draw a sprite interface (d3dspt) and not to the d3ddev? Can I enable Z-Buffering to sprite interface or is there a way to overcome this problem?

Yeah I almost solved this one.

Heres the code

Code Select Expand



D3DXCreateTextureFromFileEx(d3ddev,    // the device pointer
                                L"image.png",    // the new file name
                                D3DX_DEFAULT,    // default width
                                D3DX_DEFAULT,    // default height
                                D3DX_DEFAULT,    // no mip mapping
                                NULL,
                                D3DFMT_A8R8G8B8,    // 32-bit pixels with alpha
                                D3DPOOL_MANAGED,    // typical memory handling
                                D3DX_DEFAULT,    // no filtering
                                D3DX_DEFAULT,    // no mip filtering
                                D3DCOLOR_XRGB(255, 0, 255),    // the hot-pink color key
                                NULL,    // no image info struct
                                NULL,    // not using 256 colors
                                &Texture);    // load to sprite

RECT area;
D3DLOCKED_RECT LockedRect;

SetRect(&area, 40, 40, 45, 45);    // area is 5 x 5
Texture->LockRect(0, &LockedRect, &area, 0); // lock target area

DWORD *lockedarea = (DWORD *)LockedRect.pBits;

for(int i=0; i<25; i++)  // 5 times 5 is 25
{
lockedarea[i] = 0x00000000;  // if I do this shouldnt this produce a square but instead it produces a line that is 25
                                                       // (pixels?) long
}

Texture->UnlockRect(0);


Some other interesting issues when I try

Code Select Expand

lockedarea[i] = 0xFFFF00FF; it produses a hot-pink line but if pink is a color-key shouldnt it be then transparent but well I can just set alpha color to 0 and dont bother whit this.

But still why this produces a line instead of square whats wrong? My SetRect() is wrong or LockRect() or maybe Im drawing it wrong?

Big thanks rain_storm I will try to this out.

First I allocate memory for texture and load it

Code Select Expand


LPDIRECT3DTEXTURE9 sprite;    // the pointer to the sprite

D3DXCreateTextureFromFileEx(d3ddev,    // the device pointer
                                L"Panel2.png",    // file name to load texture from
                                D3DX_DEFAULT,    // default width
                                D3DX_DEFAULT,    // default height
                                D3DX_DEFAULT,    // no mip mapping
                                NULL,    // regular usage
                                D3DFMT_A8R8G8B8,    // 32-bit pixels with alpha
                                D3DPOOL_MANAGED,    // typical memory handling
                                D3DX_DEFAULT,    // no filtering
                                D3DX_DEFAULT,    // no mip filtering
                                D3DCOLOR_XRGB(255, 0, 255),    // the hot-pink color key
                                NULL,    // no image info struct
                                NULL,    // not using 256 colors
&sprite);    // load to sprite


2. Im not sure if Im doing this next step right

Code Select Expand


        RECT area;
D3DLOCKED_RECT area2;

SetRect(&area, 10, 10, 30, 30);  // I define area to be 20 x 20 big area from sprite
sprite->LockRect(0, &area2, &area, D3DLOCK_DISCARD); // and then I lock it


How can I access that area
can i now use sprite as a pointer and plot thing to it like

Code Select Expand


for (int i = 0; i < 30 * 30; i++)
{
    &sprite[i] = D3DCOLOR_XRGB(255, 0, 255);  // this dosent work
}


Works in here NV8800GTS vista home premium

BIG thanks to every one who ansewered I will continue working on this.

But how can i turn part of tile to transparent to see other tile under it? Can I somehow access pixels in texture and set some of them to alpha or set them match color key which will make them transparent? Or can I create 2D array copy correct data to it and then load it as a texture?

In ASD - Metamorphosis demo http://www.pouet.net/prod.php?which=50127 when the lines are drawn and ants run inside of lines how can this line drawing be achievend in directx? Im trying to make a scroller demo like Metamorphosis and I thing tiles is a way to go. Lets say I have a tile1 of size 512x512 under tile2 and tile2 of size 200x200 exactly in center over tile1. How can I draw a vertical line throught tile2 and see tile1 throught it?

Im very sorry for my bad english.