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Merge pull request #13933 from SamGondelman/accelerationSpread

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Fix particle acceleration spread
This commit is contained in:
John Conklin II 2018-09-19 11:49:42 -07:00 committed by GitHub
commit 6c63f92f39
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1 changed files with 5 additions and 8 deletions
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13
libraries/entities-renderer/src/RenderableParticleEffectEntityItem.cpp
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@ -187,12 +187,10 @@ ParticleEffectEntityRenderer::CpuParticle ParticleEffectEntityRenderer::createPa
particle.basePosition = baseTransform.getTranslation();
// Position, velocity, and acceleration
glm::vec3 emitDirection;
if (polarStart == 0.0f && polarFinish == 0.0f && emitDimensions.z == 0.0f) {
// Emit along z-axis from position
particle.velocity = (emitSpeed + randFloatInRange(-1.0f, 1.0f) * speedSpread) * (emitOrientation * Vectors::UNIT_Z);
particle.acceleration = emitAcceleration + randFloatInRange(-1.0f, 1.0f) * accelerationSpread;
emitDirection = Vectors::UNIT_Z;
} else {
// Emit around point or from ellipsoid
// - Distribute directions evenly around point
@ -210,7 +208,6 @@ ParticleEffectEntityRenderer::CpuParticle ParticleEffectEntityRenderer::createPa
azimuth = azimuthStart + (TWO_PI + azimuthFinish - azimuthStart) * randFloat();
}
glm::vec3 emitDirection;
if (emitDimensions == Vectors::ZERO) {
// Point
emitDirection = glm::quat(glm::vec3(PI_OVER_TWO - elevation, 0.0f, azimuth)) * Vectors::UNIT_Z;
@ -235,10 +232,10 @@ ParticleEffectEntityRenderer::CpuParticle ParticleEffectEntityRenderer::createPa
));
particle.relativePosition += emitOrientation * emitPosition;
}
particle.velocity = (emitSpeed + randFloatInRange(-1.0f, 1.0f) * speedSpread) * (emitOrientation * emitDirection);
particle.acceleration = emitAcceleration + randFloatInRange(-1.0f, 1.0f) * accelerationSpread;
}
particle.velocity = (emitSpeed + randFloatInRange(-1.0f, 1.0f) * speedSpread) * (emitOrientation * emitDirection);
particle.acceleration = emitAcceleration +
glm::vec3(randFloatInRange(-1.0f, 1.0f), randFloatInRange(-1.0f, 1.0f), randFloatInRange(-1.0f, 1.0f)) * accelerationSpread;
return particle;
}