Hi Melvin,
Eng Yuit Fun, Melvin wrote:
> Hi again,
>
> Sure no problem...
> I have a 5-million-point dataset containing 3D position coordinates and an
> intensity value for each point.
> This is the result of some urban atmospheric pollutant simulation where each
> point is to be rendered as a translucent smoke sprite at the specified
> position, and with the degree of translucency scaled by the specified
> intensity. Translucency animation is expected as the intensity values will
> vary with time(though the positions are all fixed).
> I hope this is clear enough? Please feel free to ask for further
> clarification...
>
The Particles core comes to mind, but it doesn't use Point Sprites
(they're fairly restrictive, and the upside-down texture is just
annoying). Today I'd probably go for a Geometry shader to create the
billboards, but I don't have an example for that, sorry. :(
Note that for 5 million transparent particles the sorting is going to
hurt a lot. We do have a BSP in the particles core, if the particle
positions don't change, but it's probably not going to be realtime in
any case.
Hope it helps
Dirk
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