|
|
Apple Shake是非常强大的后期合成软件，在很多著名电影中都有应用，例如《金刚》等。Shake的表达式跟C语言很像，先贴个操作符、函数表格以供参考。
ArithmeticOperators
| [/tr] | *
| Multiply
| /
| Divide
| +
| Plus
| -
| Subtract
| RelationalOperators
| [/tr] | <
| Less than
| >
| Greater than
| <=
| Less than or equal to
| >=
| Greater than or equal to
| ==
| Equal to
| !=
| Not equal to
| LogicalOperators
| [/tr] | &&
| And
| ||
| Or
| !
| Not
| ConditionalExpression
| [/tr] | expr1?expr2:expr3
| If expr1 is true (non-zero),then to expr2, else do expr3
| GlobalVariables
| [/tr] | time
| Current frame number
| ImageVariables
| Theseare variables carried by each node.
| parameterName
| Value of parameterNamefrom inside that node.
| nodeName.parameterName
| Value of parameterNamein nodeName from outside of that node.
| parameterName@@time
| Allowsyou to access a value at a different frame. For example:
Blur1.xPixel@@(time-3)looks at the value from 3 frames earlier.
| bytes
| The number of bytes in thatimage. This takes the input bit-depth when called from inside ofthe node, and the output bit-depth when called from outside of thenode.
| width
| Width of the image. Takesthe input width when called from inside of the node, and theoutput width when called from outside of the node.
| height
| Height of the image. Takesthe input height when called from inside of the node, and theoutput height when called from outside of the node.
| _curImageName
| Returnsthe name of the actual file being used for the current frame.Useful when plugged into a Text node:
{FileIn1._curImageName}
| dod[0], dod[1], dod[2],dod[3]
| The variable for the Domainof Definition xMin, yMin, xMax, yMax, respectively.
| In-NodeVariables
| Theseare channel variables used in nodes such as ColorX, LayerX,Reorder, etc. Check the documentation for specific supportof any variable.
| nr, ng, nb, na, nz
| New red, green, blue, alpha,Z channel
| r, g, b, a, z
| Original red, green, blue,alpha, Z channels
| l
| Luminance channel forReorder
| n
| Null channel. Strips out thealpha in Reorder when used like this: rgbn
| r2, g2, b2, a2, z2
| Second image's channel forLayerX
| MathFunctions
| [/tr] | abs(x)
| Integer absolute value.abs(-4) = 4. Be careful, as this will return an integer, not afloat. Use fabs for float.
| biasedGain(value, gain,bias)
| This gives aContrastLum-like curve that gives rolloff between twovalues.
| cbrt(x)
| Cubic root. cbrt(8) = 2
| ceil(x)
| Truncates to next integer.ceil(5.3) = 6
| clamp(x, lo, hi)
| Clamps x to betweenlo and hi
clamp(1.5,0,1) = 1
| exp(x)
| Natural exponent. exp(0) = 1
| fabs(x)
| Float absolute value.fabs(-4.1) = 4.1
| floor(x)
| Truncates to next lowestinteger. floor(5.8) = 5
| fmod(x,y)
| Float modulus. Returns theremainder in float.
fmod(11.45,3) = 2 , ie, (3x3+2.45 =11.45)
| log(x)
| Natural log. log(1) = 0
| log10(x)
| Returns base 10 log.log10(10) = 1
| M_PI
| A variable set to pi at 20decimal places
| max(a,b)
| Returns maximum between aand b
max(5,10) = 10
| max3(a,b,c)
| Returns maximum between a,b, and c.
max3(5,2,4) = 5
| min(a,b)
| Returns minumum between aand b.
min(5,10) = 10
| min3(a,b,c)
| Returns minumum between a,b, and c.
min3(5,2,4) = 2
| a%b
| Modulus. 27%20 = 7
| pow(x,y)
| Returns x to the y power.pow(2,4) = 16
| round(x)
| Rounds number off. Valuesbelow x.5 are rounded to x, values equal to or above x.5 arerounded to x+1. round(4.3) = 4
| sqrt(x)
| Square root. sqrt(9) = 3
| NoiseFunctions
| Theseare ideal for WarpXand ColorX.
| noise(seed)
| 1 dimensional cubic splineinterpolation of noise
| noise2d(seed,seed)
| 2d noise
| noise3d(seed,seed,seed)
| 3d noise
| noise4d(seed,seed,seed,seed)
| 4d noise
| lnoise(seed)
| 1d linear interpolation ofnoise
| lnoise2d(seed,seed)
| 2d noise
| lnoise3d(seed,seed,seed)
| 3d noise
| lnoise4d(seed,seed,seed,seed)
| 4d noise
| fnoise(x,xScale)
| 1d fractal noise based onnoise()
| fnoise2d(x,y,xScale,yScale)
| [/tr] | fnoise3d(x, y, z, xScale,yScale, zScale)
| [/tr] | turbulence(x, xScale)
| A cheaper, rougher versionof fnoise().
| turbulence2d(x, y, xScale,yScale )
| Continuous 2d noise
| turbulence3d(x, y, z,xScale, yScale, zScale)
| Continuous 3d noise
| rnd(seed)
| Hash-based pseudo-randomnumbers. Non-hash based RNG (like rand() or drand48()) should notbe used in Shake because they can't be reproduced from one machineto another, and even on the same machine, repeated evaluations ofthe same node at the same time would produce different results.
| rnd1d(seed, seed)
| 1d random value
| rnd2d(seed,seed,seed)
| 2d random value
| rnd3d(seed,seed,seed,seed)
| 3d random value
| rnd4d(seed,seed,seed,seed,seed)
| 4d random value
| TrigFunctions (in radians)
| [/tr] | M_PI
| A variable set to pi at 20decimal places.
| acos(A)
| Arc cosine in radians
| asin(A)
| Arc sine
| atan(A)
| Arc tangent
| atan2(y,x)
| Returns the radian verifyingsin(a) = y and cos(a) = x.
| cos(A)
| Cosine
| sin(A)
| Sin
| TrigFunctions (in degrees)
| [/tr] | 
| Hmmm, yummy trigonometry!Welcome back. For those of you who may have forgotten, here is ahelpful chart for some commonly used equations.
| acosd(A)
| arc cosine in degrees
| asind(A)
| arc sine in degrees
| atand(A)
| arc tangent in degrees
| atan2d(y,x)
| returns the angle verifyingsin(a) = y and cos(a) = x.
| cosd(A)
| cosine in degrees
| distance(x1,y1,x2,y2)
| calculates the distancebetween two points, (x1,y1) and (x2, y2)
| sind(A)
| sin in degrees
| tand(A)
| tangent in degrees
| StringFunctions
| [/tr] | stringf( "xyz",...)
| Sinceyou basically can write books on this, here is an example.Otherwise, it is recommended to purchase a book on C. There arealso several examples under the Scriptsdocumentation. This example takes the scriptName parameterand uses the system function echo to print it:
extern "C" intsystem(const char*);
const char *z= stringf("echo%s",scriptName);
system(z);
| printf( "xyz",...)
| [/tr] | strlen("mystring")
| Returns the length of thestring
| strsub(
const char*string,
int offset,
int length
)
| Extracts a string fromanother string.
| CurveFunctions
| Thecurve functions with implicit time (Linear,CSpline,etc.) all assume that time is the first argument, so the followingstatements are identical:
LinearV(time,0,1@1,20@20)
Linear(0,1@1,20@20)
Youcan, however, adjust the time value explictly with the V versionof each curve type. For more infomation on spline types, jump toAboutSplines.
Theseare the cycle type codes:
0= KeepValue
1 = KeepSlope
2 = RepeatValue
3 =MirrorValue
4 = OffsetValue
| biasedGain(x,gain,bias)
| Gives a smoothly rampedinterpolation between 0 and 1, similar to Shake's contrast curve.gain increase the contrast, and bias offsets the center.
| Linear(cycle,
value@key1,
value@key2,
...)
| Linear interpolation fromvalue at key1 to value at key2, etc.
| LinearV(time_value, cycle,value@key1,
value@key2,
...)
| Linear interpolation fromvalue at key1 to value at key2, etc.
| CSpline(cycle,
value@key1,
value@key2,
...)
| Cardinal-splineinterpolation, a.k.a. Catmull-Rom splines
| CSplineV(time_value, cycle,value@key1,
value@key2,
...)
| Cardinal-splineinterpolation, a.k.a. Catmull-Rom splines
| JSpline(cycle,
value@key1,
value@key2,
...)
| Jeffress-splineinterpolation
| JSplineV(time_value, cycle,value@key1,
value@key2,
...)
| Jeffress-splineinterpolation
| NSpline(cycle,
value@key1,
value@key2,
...)
| Natural-spline interpolation
| NSplineV(time_value, cycle,value@key1, value@key2,...)
| Natural-spline interpolation
| Hermite(cycle,
[value,tangent1,tangent2]@key1,
[value,tangent1,tangent2]@key2,
...)
| Hermite-spline interpolation
| HermiteV(time_value,cycle,
[value,tangent1,tangent2]@key1,
[value,tangent1,tangent2]@key2,
...)
| Hermite-spline
|
|
|
京ICP备14020293号-2
本网站内容均收集于互联网，如有问题请联系QQ:389897944予以删除
窥视卡
雷达卡
楼主
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡