Builds a uniform flow field from an angle and a strength. Every pixel gets the same vector (cos(Angle), sin(Angle)) × Strength, so the whole screen flows in the same direction. It is the minimal bridge from a value (float) to a field (FlowField); plug an LFO into Angle and you get a turning wind.
Angle — in degrees. The UI slider is -180 to 180, but values coming through the input port (Angle / angleInput) are not clamped
Strength — clamped to -2 to 2, default 0.2. The unit is UV displacement per second. Negative values reverse the direction
The output texture is 8×8. The field is uniform, so a minimal resolution is enough, and the consumer reads it with bilinear filtering.
