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- "Axis". The particles are created along the spline's path similar to a curtain. Emission direction is indicated in the viewport's through small arrows at the spline's control points. This direction can be changed with "@ rotation".
- "Tube" The particles are created along the spline's path. The fluid tube's thickness is defined through the circles at each control point. As with "Axis", emission direction is indicated through small arrows.
- "Edge". The particles are created at the first control point and moved along the spline through customizable forces. The first point's circle represents the area of emission.
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When enabled particles are deleted once they leave the spline‘s boundaries. This limit is indicated in the viewport through circles around the control points. In order to change the circles' radii, go to "@ CP radius".
Close spline
This option creates a connection between the spline's end points.
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A click on this button enables the “Edit” mode, indicated by a yellow frame around the viewport. While in “Edit” mode you are able to move (W key) the control points and their handles. You also have access to a selected point's individual “@ CP” “CP” settings. Please read the → “Spline Techniques” chapters.
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CP axial
Click on “EDIT” and select a control point to change the parameter's settings. “@ CP “CP axial” introduces a force along the spline's path. Positive values create a force in direction of the spline's last control point, negative values create a force in direction of the first control point.
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CP radial
Click on “EDIT” and select a control point to change the parameter's settings. “@ CP “CP radial” introduces a force around the control points.
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CP vortex
Click on “EDIT” and select a control point to change the parameter's settings. “@ CP “CP vortex” creates a rotational force around the spline's path. Positive values create a clockwise rotation, negative values create a counter-clockwise rotation.
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CP radius
Click on “EDIT” and select a control point to change the parameter's settings. The circle around indicates the forces' scope or radius. Only particles or rigid/soft bodies inside the viewport's circles will be affected. The circles' sizes can be controlled with the yellow dot: hit the R key, select one or more dots, and move it.
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CP speed
Click on “EDIT” and select a control point to change the parameter's settings. When the emitter is in "Axis" or "Tube" mode it is possible to define different emission speed values for every control point separately. This parameter is given in metres per second and accepts all positive values including 0.
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CP rotation
Click on “EDIT” and select a control point to change the parameter's settings. Every control point of the emitter has a small turquoise arrow, indicating the fluid's emission direction in "Axis" and "Tube" mode. By entering a positive degree value this emission direction can be changed.
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CP link
Every control point can be linked to another node, e.g. to animate a point's position. Normally, “Null” nodes are used for this purpose, but any other node will work as well. Simply click on “-” to open a node list.
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CP handle smoothness
With “Smooth” both tangents are affected while moving a single handle. When you switch to “Broken” the tangents can be edited separately.
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CP handle weighting
When set to “Even” both tangents have the same influence on the spline's curvature. With “Uneven” the tangents' influence is treated individually.