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I think this has something to do with how colour multipliers are applied to the materials used for the particles. First, let's suppose you have entityColor 1 set in the particle decl. If you use a material like textures/particles/boomboom3, which uses the vertexcolor keyword, as your particle, the emitter's _color gets applied to the particles. If you instead use textures/particles/dim_disk, which references entity shaderparms instead of using vertexcolor, then in 2.05 the particles have the _color of the emitter, but in 2.07 I don't see anything (maybe the effective colour is black?). If I disable entityColor and try to apply a colour within the particle decl, again, I can colour textures/particles/dim_disk in 2.05 but see nothing in 2.07. |
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It doesn't seem to be a problem with passing shaderparms in general, only with setting the colour. I tried making material stages conditional on parm7 and those particles worked as expected. |
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Relevant? (From draw_common.cpp): // Ignoring vertexColor is not recommended for particles. The particle system uses vertexColor for fading. // However, there are existing particle effects that don't use it, in which case we default to using the // rgb color modulation specified in the material like the "old stages" do below. |
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It seems to be less easily worked around than 'particles without vertexColor are broken'. bloodwound (particle decl) uses textures/particles/bloodspray In 2.05 the particle is visible on an emitter. If I comment out vertexColor, textures/particles/bloodspray becomes visible on a worldspawn patch too, and the particles remain visible. In 2.07 commenting out vertexColor still makes the material visible on a patch, but the particles are invisible either way. Edit: actually, that's probably what I noted above about particles that don't use entityColor. Possibly complicated by the material's use of a gl_one_minus_src_color multiplier in the blend mode. Edit: well, setting entityColor 1 and giving the emitter a _color doesn't seem to be getting me anywhere... |
- Anonymous
