Apple MA434Z/A User Manual - Page 942

Image Variables bytes width height _curImageName dod[0], dod[1], dod[2], dod[3] Definition The number of bytes in that image. This takes the input bit depth when called from inside of the node, and the output bit depth when called from outside of the node. Width of the image. Takes the input width when called from inside of the node, and the output width when called from outside of the node. Height of the image. Takes the input height when called from inside of the node, and the output height when called from outside of the node. Returns the name of the actual file being used for the current frame. Useful when plugged into a Text node: {FileIn1._curImageName} The variable for the Domain of Definition (DOD): xMin, yMin, xMax, yMax, respectively. The following table shows channel variables used in nodes such as ColorX, LayerX, Reorder, etc. Check the documentation for specific support of any variable. In-Node Variables nr, ng, nb, na, nz r, g, b, a, z l n r2, g2, b2, a2, z2 Definition New red, green, blue, alpha, Z channel. Original red, green, blue, alpha, Z channel. Luminance channel for Reorder. Null channel. Strips out the alpha in Reorder when used like this: rgbn Second image's channel for LayerX. Math Functions abs(x) biasedGain(value, gain, bias) cbrt(x) ceil(x) clamp(x, lo, hi) exp(x) fabs(x) floor(x) fmod(x,y) log(x) Definition Integer absolute value. abs(-4) = 4. Be careful, as this returns an integer, not a float. Use fabs for float. Gives a ContrastLum-like curve that gives roll-off between two values. Cubic root. cbrt(8) = 2 Truncates to next integer. ceil(5.3) = 6 Clamps x to between lo and hi. clamp(1.5,0,1) = 1 Natural exponent. exp(0) = 1 Float absolute value. fabs(-4.1) = 4.1 Truncates to next lowest integer. floor(5.8) = 5 Float modulus. Returns the remainder in float. fmod(11.45,3) = 2, for example, (3x3+2.45 = 11.45) Natural log. log(1) = 0 942 Chapter 31 Expressions and Scripting