Performance problem...

Snash · 2002-07-28T11:32:06

I've been working on a simple 2D engine in Direct3D.. Works great but get very choppy when I create lets say 200 sprites. I get about 800 FPS when I draw one. but when I draw 200 i get 60-70 fps. 2 faces * 200 sprites = 400 faces.(not much) Code: my draw code to place a 2D sprite on screen.. void CObject2D::Draw(float X,float Y,float Z,float A,float S) { CObject2D_D3DDevice->SetStreamSource(0, VertexBuffer, sizeof(PANEL_CUSTOMVERTEX)); CObject2D_D3DDevice->SetVertexShader(PANEL_D3DFVF_CUSTOMVERTEX); if(Texture != NULL) { CObject2D_D3DDevice->SetTexture(0, Texture); CObject2D_D3DDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE); } else { CObject2D_D3DDevice->SetTexture(0, NULL); //ERROR } D3DXMatrixIdentity(&World); D3DXMatrixScaling(&Temp,S,S,S); D3DXMatrixMultiply(&World,&World,&Temp); D3DXMatrixTranslation(&Temp, X, Y, Z); D3DXMatrixMultiply(&World,&World,&Temp); D3DXMatrixRotationZ(&Temp,A); D3DXMatrixMultiply(&World,&World,&Temp); D3DXMatrixRotationY(&Temp,-testvar); D3DXMatrixMultiply(&World,&World,&Temp); CObject2D_D3DDevice->SetTransform(D3DTS_WORLD, &World); // CObject2D_D3DDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2); } my computer specs: 1800 mhz P4 GeForce 3.. Any idea what I can do to speed this up? thanks [edited by - Snash on July 27, 2002 7:14:19 PM]

Graphics and GPU Programming Programming

Started by Snash July 27, 2002 06:12 PM

14 comments, last by Snash 21 years, 9 months ago

Semicolon

122

July 28, 2002 10:29 AM

Yes i think so!

Hippokrates

122

July 28, 2002 10:41 AM

Cool.
And how is this to be done?

Im Anfang war die Tat...
Faust

Im Anfang war die Tat...Faust

Semicolon

122

July 28, 2002 10:57 AM

Before you create the vb you transform the vectors of your vertexes with the D3DXVectorMatrixMultiply func. Then you have a buffer of transformed vertexes and you can copy them into the vb!

Hippokrates

122

July 28, 2002 11:05 AM

But what kind of FVF descriptor has to be set then? Do I have to include an rhw value ?

Im Anfang war die Tat...
Faust

Im Anfang war die Tat...Faust

Snash

122

Author

July 28, 2002 11:23 AM

the program needs to call Lock every time I want to change the Position of the X amount of sprites. Wouldnt that Reduce speed even more?

Hippokrates

122

July 28, 2002 11:32 AM

Well you will only have to lock it once per frame and then update all sprites.

Im Anfang war die Tat...
Faust

Im Anfang war die Tat...Faust

Performance problem...

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