Normalize and Blend expressions

Another personal reminder note so that I can actually remember how to do this without having to spend a few dozen minutes googling it…

Normalizing values between 2 bounds

Normalize between 0 and 1

$${x' = \frac{x - \min{x}}{\max{x} - \min{x}}}$$

Normalize between -1 and 1

$${x'' = 2\frac{x - \min{x}}{\max{x} - \min{x}}-1}$$

Normalise between a and b

$${x''' = (b-a)\frac{x - \min{x}}{\max{x} - \min{x}} + a}$$

Nuke node

NoOp {
 name NormaliseValues
 selected true
 xpos -5265
 ypos 718
 addUserKnob {20 User}
 addUserKnob {7 val}
 val 1
 addUserKnob {7 minval}
 minval 0
 addUserKnob {7 maxval}
 maxval 10
 addUserKnob {26 "" +STARTLINE}
 addUserKnob {7 upperbound}
 upperbound 1
 addUserKnob {7 lowerbound}
 addUserKnob {26 "" +STARTLINE}
 addUserKnob {7 result}
 result {{"(upperbound-lowerbound) * ((val - minval) / (maxval - minval)) + lowerbound"}}
}

Blend 2 values

With w : [0;1] $$x=Aw + B(1-w)$$

Nuke node

NoOp {
 name BlendValues
 selected true
 xpos -5080
 ypos 784
 addUserKnob {20 User}
 addUserKnob {7 val1 R -10 10}
 addUserKnob {7 val2 R -10 10}
 val2 1
 addUserKnob {7 blender}
 blender 1
 addUserKnob {26 "" +STARTLINE}
 addUserKnob {7 result R -10 10}
 result {{"val2 * blender + val1 * (1-blender)"}}
}