Qt3D-Particle-Framework
En Ar Bg De El Es Fa Fi Fr Hi Hu It Ja Kn Ko Ms Nl Pl Pt Ru Sq Th Tr Uk Zh
Details
- Summary: Support particle systems in Qt 3D's renderer
- Project lead: Paul Lemire
- Branch: wip/particles
Goals
To be able to specify particle systems at a high level but remain flexible and efficient.
Details
Initial aim is to support systems that provide compute shader capabilities as this is where the hardware is going (OpenGL ES 3.1 onwards, OpenGL 4.3 onwards, Vulkan, D3D12, Metal all have native support). Once this is working we can investigate adding some support for older systems based on transform feedback or vertex shader tricks if deemed worthwhile.
Taking inspiration from particle systems in other engines we want the ability to be able to customise: emission, forces, lifetimes, colors, orientations etc. The approach is to have the ParticleSystem component dynamically generate suitable compute shaders that are then used to step the particle simulations and feed data to the renderer for actually displaying the particles.
The rendering part is taken care of by specifying a GeometryRenderer and Material as usual. The ParticleSystem component only steps the particle simulation.
Rendering may be done by building indirect draw call command buffers in the compute shader.