79 lines
2.4 KiB
ReStructuredText
79 lines
2.4 KiB
ReStructuredText
.. TODO2.8, Add: Angular Velocity: Axis changed, added options.
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********
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Rotation
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.. reference::
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:Panel: :menuselection:`Particle System --> Rotation`
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.. TODO2.8:
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.. figure:: /images/physics_particles_emitter_rotation_panel.png
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Particles rotation settings.
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These parameters specify how the individual particles are rotated during their travel.
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To visualize the rotation of a particle, display particles as *Axis*
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in the :doc:`/physics/particles/emitter/display` panel.
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Orientation Axis
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Sets the initial rotation of the particle by aligning the X axis in the direction of:
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None
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The global X axis.
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Normal
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Orient to the emitter's surface normal, the objects Y axis points outwards.
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Normal-Tangent
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As with normal, orient the Y axis to the surface normal.
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Also orient the X axis to the tangent for control over the objects rotation about the normal.
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requires UV coordinates, the UV rotation effects the objects orientation, currently uses the active UV map.
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This allow deformation without the objects rotating in relation to their surface.
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Velocity
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The particle's initial velocity.
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Global X, Y, Z
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One of the global axes.
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Object X, Y, Z
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One of the emitter object axes.
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Random
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Randomizes rotation.
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Phase
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Initial rotation phase.
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Randomize Phase
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Adds a random variation to the *Phase*.
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Dynamic
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If Dynamic is enabled, only initializes particles to the chosen rotation and angular velocity and
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let the physics simulation handle the rest.
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Particles then change their angular velocity if they collide with other objects
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(like in the real world due to friction between the colliding surfaces).
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Otherwise the angular velocity is predetermined at all times (i.e. set rotation to dynamic/constant).
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Angular Velocity
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================
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.. reference::
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:Panel: :menuselection:`Particle System --> Rotation --> Angular Velocity`
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Axis
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The selector specifies the axis of angular velocity to be.
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None
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A zero vector (no rotation).
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Spin
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The particles velocity vector.
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Random
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A random vector.
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.. hint:: Curve Guide
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If you use a Curve Guide and want the particles to follow the curve,
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you have to set Angular Velocity to Spin and leave the rotation on Constant
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(i.e. do not turn on Dynamic). Curve Follow does not work for particles.
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Amount
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The magnitude of angular velocity.
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