Direct3D Particle System Testing

Playing around with a particle system that I made during the fall of 2010 using C++ and DirectX 9.0c. Fraps unfortunately made the frame rate slow down and fluctuate (usually stable at 60 Hz).

Category:

Science & Technology

Tags:

• particle system
• particle
• particles
• c++
• programming
• directx
• direct3d
• point sprites
• sine wave
• explosion

[khyar]

Nice! I have yet to master glowing / translucent point sprites like that with DX9c, how did you do it? I really want to make an effect as seen in the video /watch?v=Zst40bqW1P8 . Any tips?

[Zeptoflop]

@khyar Hey! For a glowing effect what you want is additive blending. In the program running here I believe I use these render states when rendering the particles:

SetRenderState( D3DRENDERSTATE_ALPHABLENDENABL­E, TRUE );

SetRenderState( D3DRS_FILLMODE, D3DFILL_POINT );

SetRenderState( D3DRS_LIGHTING, FALSE );

SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );

SetRenderState( D3DRS_DESTBLEND, D3DBLEND_ONE );

SetRenderState( D3DRS_ZWRITEENABLE, FALSE );

[Zeptoflop]

@khyar Note that I disable the Z-buffer so of course things would not look very pleasing if you were to have additional geometry in your scene, and enabling Z-buffer writes and sorting the particles would be needed in such a case, but judging by your "Tree of Life" video it seems like you are well aware of this. :)

[khyar]

@Zeptoflop Wohoo! Thanks a lot. I immersed myself in a 100x100x100 cube with 10000 randomly distributed rainbow coloured, alpha blended, point sprites and then spun it around. Very pretty and relaxing ;-))))) Maybe I will post a video....