Linear float curve

Module — 2 files

These files compile together (same module folder).

curve_float.verse

using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/SpatialMath }

# A curve meant to be @editable
# The X values of the point should be sequential
curve_float := class<concrete>()
{
    # Given the points:
    # 0, 0
    # 5, 100
    # 10, 0
    #
    # Results:
    # For X=2,  Y=40
    # For X=5,  Y=100
    # For X=7.5,Y=50
    # For X=10, Y=0
    # For X=-1, Fails
    # For X=11, Fails
    @editable
    Points: []vector2 = array{}

    Evaluate(X: float)<transacts><decides>:float =
        var Result: ?float = false
        for: 
            Index->Point: Points
            not Result?                         # If Result is not set, else skip
            CurrentPoint:= Points[Index]
            NextPoint:= Points[Index+1]
            CurrentPoint.X <= X <= NextPoint.X  # If X is between two points
            Alpha:= (X-CurrentPoint.X)/(NextPoint.X-CurrentPoint.X) # Get the alpha value from X in relation to the two points
        do:
            set Result = option{Lerp(CurrentPoint.Y, NextPoint.Y, Alpha)}
        Result?
}

file_2.verse

# The curve should have values so X=1.0 can be evaluated
@editable
Curve: curve_float = curve_float{}

# Can also be defined in Verse directly
@editable
Curve2: curve_float = curve_float:
    Points:= array:
        vector2{X:= 0.0, Y:= 0.0}
        vector2{X:= 1.0, Y:= 100.0}
        vector2{X:= 2.0, Y:= 0.0}

Test():void =
    # Evaluate curve for X = 1.0
    if(Value := Curve.Evaluate[1.0]):
        Print("Y Value is {Value}")

Copy-paste each file above is always free.

Linear float curve

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