The problem of the first test was, I'll have to make an emitter for each every keys if the character presses every piano keys. Also when some keys are pressed more than twice, the key should have either more than 2 emitters as the particle system can't be started more than twice. Because when once an emitter operates, it will emit the particles until lifespan of particles or endlessly.
Another way can be rendering each emitters separately and comp it later. However this way will be not only a lot of hassle and take too much time, but also it has very low chance to make good interaction with the character.
So I came up with an idea of using curve emitter. I made a line of EP curve on the piano keys and created vertexes to match up on the keys. After that, I made the curve line as emitter (emitter from object - Emitter type : Curve). Curve emitter makes each every vortexes as the source of particles.
Also I added random function to vary the particles' size. Then I played the animation..
Then the particles are emitted from each vertexes AT THE SAME TIME as you can see from the above screenshot. I wish I could modified the start time for the each emitter....
Plus, all the emitter produced such amount of particles at the same time, particles don't really stick to the goal, and also the air and the turbulence field can't control them like the first test.
Side of the particle emitting.
After all, using the curve emitter can make particles without making each every emitters separately, but it's hard to control the each emitter starts at the different time. Also im worried if the particles are too many and it might can ruin the whole scene. Ill keep finding better solution for this scene as we still have time. But hopefully find the solution soon.
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