Set Position (Shape : Line)

Menu Path : Position > Set Position (Shape : Line)

The Set Position (Shape : Line) Block calculates a position based on an input Line and stores the result in the position attribute, based on composition.

This Block also calculates a direction vector based on the calculated position on the shape, and stores it to the direction attribute, based on composition. This direction is equal to the normalized vector that goes from the start point of the line to its end point.

Note: Velocity from Direction and Speed Blocks can then process the direction attribute.

Block compatibility

This Block is compatible with the following Contexts:

Block settings

Setting Type Description
Spawn Mode Enum Specifies how to distribute particles along the line: The options are:
• Random: Calculates a per-particle random progress (from 0 to 1) along the line.
• Custom: Allows you to manually specify the progress on the line in the Line Sequencer property.
Composition Position Enum (Inspector) Specifies how this Block composes the position attribute. The options are:
• Set: Overwrites the position attribute with the new value.
• Add: Adds the new value to the position attribute value.
• Multiply: Multiplies the position attribute value by the new value.
• Blend: Interpolates between the position attribute value and the new value. You can specify the blend factor between 0 and 1.
Composition Direction Enum (Inspector) Specifies how this Block composes the direction attribute. The options are:
• Set: Overwrites the position attribute with the new value.
• Add: Adds the new value to the position attribute value.
• Multiply: Multiplies the position attribute value by the new value.
• Blend: Interpolates between the position attribute value and the new value. You can specify the blend factor between 0 and 1.

Block properties

Input Type Description
Line Line The Line that determines the shape to calculate the position from..
Line Sequencer Float Determines the position of a particle on the line (as a percentage of its progress).
This property only appears if you set Spawn Mode to Custom.
Blend Position Float The blend percentage between the current position attribute value and the newly calculated position value.
This property only appears if you set Composition Position to Blend.
Blend Direction Float The blend percentage between the current direction attribute value and the newly calculated direction value.
This property only appears if you set Composition Direction to Blend.