def test_particle_burst_emission():
effect = ParticleEffect()
system = Particles("testSystem", 10)
effect.add_particles(system)
# Setup some dummy nodes, since it seems to want them
# We might normally call "start", but that calls "enable", which
# seems to assume that "base" exists and has physics and particle managers...
system.setRenderParent(NodePath(PandaNode("test")))
system.setSpawnRenderNodePath(NodePath(PandaNode("test")))
# However, we don't want normal emission, so we now soft-stop it immediately,
# before the system has a chance to update and emit.
effect.softStop()
# Now, a sanity-check: assert that we have no particles,
# Then update the system, and assert again that we
# have no particles. If so, then we're (hopefully)
# not emitting normally!
assert system.getLivingParticles() == 0
system.update(1)
assert system.getLivingParticles() == 0
# Now, the real test: emit a particle-burst!
effect.birthLitter()
# And assert that a particle has, in fact, been emitted.
assert system.getLivingParticles() == 1
# Check the snake-case version, too.
effect.birth_litter()
assert system.getLivingParticles() == 2
class Explosion:
def __init__(self, base):
self.base = base
self.p = Particles()
self.p.setFactory("PointParticleFactory")
self.p.setRenderer("LineParticleRenderer")
self.p.setEmitter("SphereSurfaceEmitter")
self.p.setPoolSize(256)
self.p.setBirthRate(0.01)
self.p.setLitterSize(256)
self.p.setSystemLifespan(2)
self.p.factory.setLifespanBase(5.0000)
self.p.renderer.setTailColor(Vec4(1.0, 1.0, 0.0, 1.0))
self.p.renderer.setHeadColor(Vec4(1.0, 0.0, 0.0, 1.0))
self.p.renderer.setAlphaMode(BaseParticleRenderer.PRALPHAOUT)
self.p.renderer.setUserAlpha(1.00)
self.p.renderer.setLineScaleFactor(32.00)
self.p.emitter.setRadius(2.0000)
self.p.setRenderParent(base.render)
self.p.enable()
self.pn = base.render.attachNewNode("particleExpNode")
# self.pn.setDepthWrite(False)
# self.pn.setBin("fixed", 0)
self.pe = ParticleEffect("exp-effect", self.p)
self.pe.reparentTo(self.pn)
self.pe.enable()