ID3DXSprite
Author
Hi everybody
Ive desided to look into the ID3DXSprite interface since it appears to be a powerful tool. Are there any nice tutorials/samples explaining the basic consepts and usage of the interface?
I searched google "ID3DXSprite Samples" but i found nothing.
//Emil
well you could go to msdn they have a pretty comprehensive explanation but I will give you an overview.
The first thing you need to do is set up direct3d(I will assume that you already know how to do this so I will just overview it)
then you need to do is create a pointer for your sprite. This will be the way you access and controll the ID3DXSPRITE.
despite what it seems, you dont need a sprite object for every sprite you want to draw in the gameworld. That is why I named it sprite_handler instead of something spacific like Micky_sprite.
Before you can use the pointer you have to create the sprite inteface and with sprite_handler pointing to the interface
to draw the sprite you need to first load a texture into memory.
you can do this with the following:
now that you have a texture you can draw it on the screen as a sprite using the sprite interface
there you go. I am sure I missed a few things But i gave you the names of may inportant functions so just go to msdn and look them up. IT has much more information that I do.
The first thing you need to do is set up direct3d(I will assume that you already know how to do this so I will just overview it)
//so you have the handle for the direct3ddevice9LPDIRECT3D9 d3d = NULL;LPDIRECT3DDEVICE9 d3ddev = NULL;then you need to do is create a pointer for your sprite. This will be the way you access and controll the ID3DXSPRITE.
//this declares a pointer for the spriteLPD3DXSPRITE sprite_handler;despite what it seems, you dont need a sprite object for every sprite you want to draw in the gameworld. That is why I named it sprite_handler instead of something spacific like Micky_sprite.
Before you can use the pointer you have to create the sprite inteface and with sprite_handler pointing to the interface
//now the sprite_handler points to a sprite.D3DXCreateSprite(d3ddev, &sprite_handler);to draw the sprite you need to first load a texture into memory.
you can do this with the following:
//the texture pointer LPDIRECT3DTEXTURE9 MickyTexture = NULL; //the struct for reading bitmap file info D3DXIMAGE_INFO info; //standard Windows return value HRESULT result; //get width and height from bitmap file result = D3DXGetImageInfoFromFile(filename, &info); if (result != D3D_OK) return NULL; //create the new texture by loading a bitmap image file D3DXCreateTextureFromFileEx( d3ddev, //Direct3D device object "Micky.bmp", //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 D3DCOLOR_XRGB(255,0,255), //color key for transparency (anytime d3d finds this color it will turn it transparent. &info, //bitmap file info (from loaded file) NULL, //color palette &MickyTexture ); //destination texture //make sure the bitmap textre was loaded correctly if (result != D3D_OK) MessageBox(hwnd, "unable to create texture", "error", MB_OK);now that you have a texture you can draw it on the screen as a sprite using the sprite interface
d3dd3v->BeginScene();sprite_handler->Begin(d3dxsprite_alphablend); //THIS ALLOWS ALPHABLENDING OF DIFFERENT SPRITES//YOU MUST CAll Begin in order to use the draw interfaceD3DXVECTOR2 translate(50,300);D3DXVECTOR2 scaleVector(.5, 2);D3DXMATRIX mscale;D3DXMatrixTransformation2D(&mscale, NULL, NULL, &scaleVector, NULL, NULL, &translate);sprite_handler->SetTransform(&premscale); sprite_handler->Draw( &MickyTexture, NULL, NULL, NULL, D3DCOLOR_RGBA(255,255,255,255));sprite_handler->End();d3dd3v->EndScene();d3ddev->Present(NULL,NULL,NULL,NULL);there you go. I am sure I missed a few things But i gave you the names of may inportant functions so just go to msdn and look them up. IT has much more information that I do.
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