View Full Version : Per particle goal weights, strange behaviour

 Droolz03 March 2008, 11:39 PMHey all, I'm tring to animate some particles that have 4 goals, and I'd like the attracted particles to be fairly random. The creation expression looks like this: baseParticleShape.mass = `rand 0.5 2.0`; //set 'goal ID' for the particles - note rand is higher than number of goals, so approx 50% of particles have no goal weights assigned baseParticleShape.userScalar1PP = floor(rand(8)); int \$id=baseParticleShape.userScalar1PP; //set all goals to void baseParticleShape.goalWeight0PP =0; baseParticleShape.goalWeight1PP =0; baseParticleShape.goalWeight2PP =0; baseParticleShape.goalWeight3PP =0; if (\$id==0){ baseParticleShape.goalWeight0PP=0.5; }else if (\$id==1){ baseParticleShape.goalWeight1PP=0.5; }else if (\$id==2){ baseParticleShape.goalWeight2PP=0.5; }else if (\$id==3){ baseParticleShape.goalWeight3PP=0.5; } The idea behind this is roughly 50% of the particles will get weighted to a goal, the others ignore the goals. The overall (non PP) goal weights are set to 1. If you cut this: if (\$id==0){ baseParticleShape.goalWeight0PP=0.5; }else if (\$id==1){ baseParticleShape.goalWeight1PP=0.5; }else if (\$id==2){ baseParticleShape.goalWeight2PP=0.5; }else if (\$id==3){ baseParticleShape.goalWeight3PP=0.5; } Then you get the behavior of no goals, as expected. However with this code, *all* particles appear to be weighted. There are no 'loose' particles. Does anyone have any ideas why this is the case, no doubt something astoundingly obvious, but I appear to be having a perpetual brainfart. Cheers, Jules
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03 March 2008, 11:39 PM
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