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Multiple sprites - multiple transformations

Started by Side Winder Jun 13, 2007 at 8:01 PM 2 replies 850+ views

Original Post

Jun 13, 2007 at 8:01 PM

Is the only way for this to have multiple sprite interfaces with one sprite per interface? For example, I have a ship sprite on one interface which I translate and rotate a certain way. If I were to have an enemy on that same interface, that enemy would also be translated and rotated, yes? So I'd need to have them on different interfaces..?

Wardyahh

Jun 13, 2007 at 8:27 PM

you could maybe overlay one sprite onto the other manually (by copying the
individual pixels onto the lower sprite permanantly)after the lowersprite
has been rotated but that would only work for a single rotation and only
if top sprite was completely withing the boundaries of the bottom one.

what are you trying to accomplish and i might be able to suggest an alternative
..although i am far from an expert :)

renman29

Jun 14, 2007 at 3:33 AM

Might not need to. Maybe this works?

a=0; do {    D3DXMATRIX mat;    D3DXVECTOR2 pos=D3DXVECTOR2(ship[a].x,ship[a].y);    D3DXVECTOR2 mid=D3DXVECTOR2(ship[a].center_x,ship[a].center_y);    D3DXVECTOR2 scale(ship[a].scale,ship[a].scale);    float rot=ship[a].rot;    D3DXMatrixTransformation2(&mat,NULL,0.0,&scale,∣,rot,&pos);    g_sprite->SetTransform(&mat);    g_sprite->Draw(ship_texture[a],NULL,NULL,NULL,0xFFFFFFFF));    a++;}while(a<num_ships);

I haven't tested it but if I understand the problem correctly, it seems like this should work.
Best of luck! :)

Side Winder

Author

Side Winder

Jun 14, 2007 at 6:07 AM

Quote:
Original post by renman29
Might not need to. Maybe this works?

*** Source Snippet Removed ***

I haven't tested it but if I understand the problem correctly, it seems like this should work.
Best of luck! :)

Ah, yes that could work.

And I'm making a sprite-based asteroids game.

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