CompStart

Pro레슨코스엘리먼트소프트웨어

CompStart

최첨단 시각효과 기술을 마스터하세요.

학습

코스레슨Pro 기능에셋소프트웨어

Tools

Tech CheckDisplay CheckMotion BlurCIE 1931PhysLightNuke Tools

회사

Instructor미션임프레숨개인정보처리방침이용약관

프로젝트

Moray RenderEXR ConverterOCIO.ccNuke ToolsDerekVFX

Follow

YouTubeInstagramTikTokThreads문의

© 2026 CompStart. All rights reserved.

스펙트럼 수차

ToolSets / Lens
Lens

2026-09-07

ToolSets/lens/spectralAberration.nk

렌즈
색수차
캘리포니아
광학
주변
블링크스크립트
분산
공익사업
View on GitHub

Nuke용 파장 샘플링 색수차 - 분산 곡선에서 가져온 방사형, 선형 또는 스핀 색수차이며, RGB 채널 스케일이 아닙니다.

스펙트럼 수차는 파장 범위를 샘플링하고 CIE 기반 가중치를 사용하여 RGB를 재구성함으로써 색수차를 생성합니다. 이는 단순한 RGB 채널 스케일이나 오프셋이 아닙니다.

이 기능을 사용하여 플레이트 렌즈의 색수차를 보정하거나 제어된 테두리 효과를 추가할 수 있습니다. 모드는 방사형(측면 색수차), 선형(프리즘 번짐), 회전(헬리오스 스타일 소용돌이), 방사형 후 회전을 지원합니다. 분산 옵션은 선형 파장, BK7 코시, 플린트 SF10입니다. 양은 강도를 설정하고, 보호 및 감소는 중앙부를 깨끗하게 유지합니다. 초점 파장, 람다 최소/최대, 샘플 수, 테두리 채도, 종횡비, 반전, 중앙 모양 조정을 통해 테두리 효과를 조절할 수 있습니다.

알파는 소스에 유지되거나 가장자리로 확장될 수 있습니다. 오버스캔, 바운딩 박스 유지, 마스크 및 믹스핏은 표준 컴포지션 사용에 적합합니다. 이 효과는 BlinkScript에서 실행되며 상용 Nuke가 필요합니다. 컨트롤이 작동하지 않으면 커널을 다시 컴파일한 후 노브를 바인딩하십시오.

Script code

set cut_paste_input [stack 0]
version 17.0 v3
push $cut_paste_input
Group {
 name spectralAberration
 help "spectralAberration v1.2\n\nWavelength-sampled CA. Not RGB channel scale.\n\nIf the Viewer looks unchanged:\n1. Ctrl+Enter into this Group\n2. Select SpectralCA_kernel\n3. BlinkScript tab → factory Recompile\n4. Click Bind knobs on this Group\n5. Set amount to 0.05 and protect to 0. Look at the corners.\n\nBlinkScript requires commercial Nuke.\nderekvfx.ca"
 onCreate "n = nuke.thisNode()\nk = n.node('SpectralCA_kernel')\nif k is not None:\n    try:\n        src = k\['kernelSource'].value()\n        k\['kernelSource'].setValue(src)\n    except Exception:\n        pass\n    try:\n        if 'rebuild' in k.knobs():\n            k\['rebuild'].setValue('')\n    except Exception:\n        pass\n    pairs = \[\n        ('SpectralCA_amount', 'parent.amount'),\n        ('SpectralCA_samples', 'parent.samples'),\n        ('SpectralCA_focusNm', 'parent.focusNm'),\n        ('SpectralCA_lambdaMin', 'parent.lambdaMin'),\n        ('SpectralCA_lambdaMax', 'parent.lambdaMax'),\n        ('SpectralCA_mode', 'parent.mode'),\n        ('SpectralCA_curve', 'parent.curve'),\n        ('SpectralCA_invert', 'parent.invert'),\n        ('SpectralCA_alphaMode', 'parent.alphaMode'),\n        ('SpectralCA_aspect', 'parent.aspect'),\n        ('SpectralCA_protect', 'parent.protect'),\n        ('SpectralCA_falloff', 'parent.falloff'),\n        ('SpectralCA_angleDeg', 'parent.angleDeg'),\n        ('SpectralCA_spinDeg', 'parent.spinDeg'),\n        ('SpectralCA_fringeSat', 'parent.fringeSat'),\n    ]\n    for knob, expr in pairs:\n        if k.knob(knob):\n            try:\n                k\[knob].setExpression(expr)\n            except Exception:\n                pass\n    if k.knob('SpectralCA_center'):\n        try:\n            k\['SpectralCA_center'].setExpression('parent.center.x', 0)\n            k\['SpectralCA_center'].setExpression('parent.center.y', 1)\n        except Exception:\n            pass\n    if k.knob('SpectralCA_formatSize'):\n        try:\n            k\['SpectralCA_formatSize'].setExpression('width', 0)\n            k\['SpectralCA_formatSize'].setExpression('height', 1)\n        except Exception:\n            pass\n"
 tile_color 0x421010ff
 label "spectral CA"
 selected true
 xpos 507
 ypos 971
 addUserKnob {20 User l spectralAberration}
 addUserKnob {22 bindBtn l "Bind knobs" t "Wire Group knobs to the inner Blink kernel. Does not call execute() on PythonKnobs. If it says 0 knobs bound, use the factory Recompile inside SpectralCA_kernel first." -STARTLINE T "n = nuke.thisNode()\nk = n.node('SpectralCA_kernel')\nif k is None:\n    nuke.message('SpectralCA_kernel not found. Ctrl+Enter into the Group and check.')\nelse:\n    try:\n        src = k\['kernelSource'].value()\n        k\['kernelSource'].setValue(src)\n    except Exception:\n        pass\n    try:\n        if 'rebuild' in k.knobs():\n            k\['rebuild'].setValue('')\n    except Exception:\n        pass\n    try:\n        if 'recompileCount' in k.knobs():\n            k\['recompileCount'].setValue(int(k\['recompileCount'].value()) + 1)\n    except Exception:\n        pass\n    pairs = \[\n        ('SpectralCA_amount', 'parent.amount'),\n        ('SpectralCA_samples', 'parent.samples'),\n        ('SpectralCA_focusNm', 'parent.focusNm'),\n        ('SpectralCA_lambdaMin', 'parent.lambdaMin'),\n        ('SpectralCA_lambdaMax', 'parent.lambdaMax'),\n        ('SpectralCA_mode', 'parent.mode'),\n        ('SpectralCA_curve', 'parent.curve'),\n        ('SpectralCA_invert', 'parent.invert'),\n        ('SpectralCA_alphaMode', 'parent.alphaMode'),\n        ('SpectralCA_aspect', 'parent.aspect'),\n        ('SpectralCA_protect', 'parent.protect'),\n        ('SpectralCA_falloff', 'parent.falloff'),\n        ('SpectralCA_angleDeg', 'parent.angleDeg'),\n        ('SpectralCA_spinDeg', 'parent.spinDeg'),\n        ('SpectralCA_fringeSat', 'parent.fringeSat'),\n    ]\n    bound = 0\n    missing = \[]\n    for knob, expr in pairs:\n        if k.knob(knob):\n            try:\n                k\[knob].setExpression(expr)\n                bound += 1\n            except Exception:\n                missing.append(knob)\n        else:\n            missing.append(knob)\n    if k.knob('SpectralCA_center'):\n        try:\n            k\['SpectralCA_center'].setExpression('parent.center.x', 0)\n            k\['SpectralCA_center'].setExpression('parent.center.y', 1)\n            bound += 1\n        except Exception:\n            missing.append('SpectralCA_center')\n    else:\n        missing.append('SpectralCA_center')\n    if k.knob('SpectralCA_formatSize'):\n        try:\n            k\['SpectralCA_formatSize'].setExpression('width', 0)\n            k\['SpectralCA_formatSize'].setExpression('height', 1)\n            bound += 1\n        except Exception:\n            missing.append('SpectralCA_formatSize')\n    else:\n        missing.append('SpectralCA_formatSize')\n    if bound == 0:\n        nuke.message('Kernel params are not built yet.\\n\\nCtrl+Enter into the Group, select SpectralCA_kernel, open the BlinkScript tab, click the factory Recompile button, then click Bind knobs again.\\n\\nOr just drive amount on the Kernel Parameters tab (try 0.05, protect 0).')\n    else:\n        nuke.message('Bound %d kernel knobs.\\nSet amount to 0.05 and protect to 0, then look at the frame corners.' % bound)\n"}
 addUserKnob {26 ""}
 addUserKnob {4 mode t "radial = lateral CA.\nlinear = prism smear.\nspin = Helios swirl.\nradial+spin = radial then swirl." M {radial linear spin radial+spin}}
 addUserKnob {4 curve l dispersion t "linear λ = even hues.\nBK7 Cauchy = crown glass.\nflint SF10 = heavier blue." M {"linear λ" "BK7 Cauchy" "flint SF10"}}
 curve "flint SF10"
 addUserKnob {7 amount t "0.05 is obvious. 0.008-0.02 matches plates. 0 is identity." R -0.2 0.2}
 amount 0.022
 addUserKnob {3 samples}
 samples 22
 addUserKnob {6 invert t "Flip red/blue sides." -STARTLINE}
 addUserKnob {26 ""}
 addUserKnob {7 focusNm l "focus (nm)" R 400 700}
 focusNm 550
 addUserKnob {7 lambdaMin l "λ min" R 380 500}
 lambdaMin 400
 addUserKnob {7 lambdaMax l "λ max" R 600 780}
 lambdaMax 700
 addUserKnob {7 fringeSat l "fringe sat" R 0 2}
 fringeSat 1
 addUserKnob {26 ""}
 addUserKnob {12 center}
 center {{width/2} {height/2}}
 addUserKnob {22 snapCenter l "snap / lock center" -STARTLINE T "n = nuke.thisNode()\nn\['center'].clearAnimated()\nn\['center'].setExpression('width/2', 0)\nn\['center'].setExpression('height/2', 1)\n"}
 addUserKnob {22 unlockCenter l unlock -STARTLINE T "n = nuke.thisNode()\ntry:\n    x = n.width()/2.0\n    y = n.height()/2.0\nexcept:\n    x = n\['center'].getValue(0)\n    y = n\['center'].getValue(1)\nn\['center'].clearAnimated()\nn\['center'].setValue(\[x, y])\n"}
 addUserKnob {7 aspect R 0.25 4}
 aspect 1
 addUserKnob {7 protect t "0 = aberration everywhere. 0.2 = clean center."}
 addUserKnob {7 falloff l "protect gamma" R 0.1 4}
 falloff 1
 addUserKnob {26 ""}
 addUserKnob {7 spinDeg l swirl R -45 45}
 addUserKnob {7 angleDeg l "linear angle" R -180 180}
 addUserKnob {26 ""}
 addUserKnob {4 alphaMode l alpha M {"source alpha" "dilate to fringe"}}
 addUserKnob {7 overscan R 0 200}
 overscan 32
 addUserKnob {6 preserveBBox l "preserve bbox" +STARTLINE}
 preserveBBox true
 addUserKnob {26 ""}
 addUserKnob {41 maskChannelMask l mask T MergeOut.maskChannelMask}
 addUserKnob {41 invert_mask l invert T MergeOut.invert_mask}
 addUserKnob {41 mix T MergeOut.mix}
 addUserKnob {26 ""}
 addUserKnob {26 lbl l "" +STARTLINE T "spectralAberration v1.2"}
 addUserKnob {22 btn l DerekVFX.ca T "nuke.tcl('start', 'https://derekvfx.ca')" +STARTLINE}
}
 Input {
  inputs 0
  name Input
  xpos 0
  ypos -400
 }
set Nd44d4f00 [stack 0]
 Input {
  inputs 0
  name mask
  xpos 280
  ypos -400
  number 1
 }
 AddChannels {
  channels rgba
  name AddChannels1
  xpos 280
  ypos -376
 }
push $Nd44d4f00
push $Nd44d4f00
 AdjBBox {
  numpixels {{parent.overscan}}
  name AdjBBox1
  xpos 0
  ypos -300
 }
 BlinkScript {
  recompileCount 2
  ProgramGroup 1
  KernelDescription "3 \"SpectralCA\" iterate pixelWise b3cabcc9dea6241db8efaa5ebee73a76791c436fdfcf30f63f6d4d77719a322d 2 \"src\" Read Random \"dst\" Write Point 17 \"amount\" Float 1 CtcjPQ== \"samples\" Int 1 CwAAAA== \"focusNm\" Float 1 AIAJRA== \"lambdaMin\" Float 1 AADIQw== \"lambdaMax\" Float 1 AAAvRA== \"mode\" Int 1 AAAAAA== \"curve\" Int 1 AQAAAA== \"invert\" Int 1 AAAAAA== \"alphaMode\" Int 1 AAAAAA== \"center\" Float 2 AABwRAAAB0Q= \"formatSize\" Float 2 AADwRAAAh0Q= \"aspect\" Float 1 AACAPw== \"protect\" Float 1 zcxMPg== \"falloff\" Float 1 AACAPw== \"angleDeg\" Float 1 AAAAAA== \"spinDeg\" Float 1 AAAAAA== \"fringeSat\" Float 1 AACAPw== 17 \"amount\" 1 1 Default \"samples\" 1 1 Default \"focusNm\" 1 1 Default \"lambdaMin\" 1 1 Default \"lambdaMax\" 1 1 Default \"mode\" 1 1 Default \"curve\" 1 1 Default \"invert\" 1 1 Default \"alphaMode\" 1 1 Default \"center\" 2 1 Default \"formatSize\" 2 1 Default \"aspect\" 1 1 Default \"protect\" 1 1 Default \"falloff\" 1 1 Default \"angleDeg\" 1 1 Default \"spinDeg\" 1 1 Default \"fringeSat\" 1 1 Default 4 \"wRGB\" Float 3 32 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= \"disp\" Float 1 32 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= \"n\" Int 1 1 AAAAAA== \"maxRadius\" Float 1 1 AAAAAA=="
  kernelSource "kernel SpectralCA : ImageComputationKernel<ePixelWise>\n\{\n  Image<eRead, eAccessRandom, eEdgeClamped> src;\n  Image<eWrite> dst;\n\n  param:\n    float amount;\n    int samples;\n    float focusNm;\n    float lambdaMin;\n    float lambdaMax;\n    int mode;\n    int curve;\n    int invert;\n    int alphaMode;\n    float2 center;\n    float2 formatSize;\n    float aspect;\n    float protect;\n    float falloff;\n    float angleDeg;\n    float spinDeg;\n    float fringeSat;\n\n  local:\n    float3 wRGB\[32];\n    float disp\[32];\n    int n;\n    float maxRadius;\n\n  void define() \{\n    defineParam(amount,     \"amount\",     0.04f);\n    defineParam(samples,    \"samples\",    11);\n    defineParam(focusNm,    \"focusNm\",    550.0f);\n    defineParam(lambdaMin,  \"lambdaMin\",  400.0f);\n    defineParam(lambdaMax,  \"lambdaMax\",  700.0f);\n    defineParam(mode,       \"mode\",       0);\n    defineParam(curve,      \"curve\",      1);\n    defineParam(invert,     \"invert\",     0);\n    defineParam(alphaMode,  \"alphaMode\",  0);\n    defineParam(center,     \"center\",     float2(960.0f, 540.0f));\n    defineParam(formatSize, \"formatSize\", float2(1920.0f, 1080.0f));\n    defineParam(aspect,     \"aspect\",     1.0f);\n    defineParam(protect,    \"protect\",    0.2f);\n    defineParam(falloff,    \"falloff\",    1.0f);\n    defineParam(angleDeg,   \"angleDeg\",   0.0f);\n    defineParam(spinDeg,    \"spinDeg\",    0.0f);\n    defineParam(fringeSat,  \"fringeSat\",  1.0f);\n  \}\n\n  float cmfX(float lam) \{\n    float t1 = (lam - 442.0f) * ((lam < 442.0f) ? 0.0624f : 0.0374f);\n    float t2 = (lam - 599.8f) * ((lam < 599.8f) ? 0.0264f : 0.0323f);\n    float t3 = (lam - 501.1f) * ((lam < 501.1f) ? 0.0490f : 0.0382f);\n    return 0.362f * exp(-0.5f * t1 * t1)\n         + 1.056f * exp(-0.5f * t2 * t2)\n         - 0.065f * exp(-0.5f * t3 * t3);\n  \}\n\n  float cmfY(float lam) \{\n    float t1 = (lam - 568.8f) * ((lam < 568.8f) ? 0.0213f : 0.0247f);\n    float t2 = (lam - 530.9f) * ((lam < 530.9f) ? 0.0613f : 0.0322f);\n    return 0.821f * exp(-0.5f * t1 * t1)\n         + 0.286f * exp(-0.5f * t2 * t2);\n  \}\n\n  float cmfZ(float lam) \{\n    float t1 = (lam - 437.0f) * ((lam < 437.0f) ? 0.0845f : 0.0278f);\n    float t2 = (lam - 459.0f) * ((lam < 459.0f) ? 0.0385f : 0.0725f);\n    return 1.217f * exp(-0.5f * t1 * t1)\n         + 0.681f * exp(-0.5f * t2 * t2);\n  \}\n\n  float3 xyzToRec709(float3 xyz) \{\n    return float3(\n       3.2404542f * xyz.x - 1.5371385f * xyz.y - 0.4985314f * xyz.z,\n      -0.9692660f * xyz.x + 1.8760108f * xyz.y + 0.0415560f * xyz.z,\n       0.0556434f * xyz.x - 0.2040259f * xyz.y + 1.0572252f * xyz.z\n    );\n  \}\n\n  float iorDelta(float lamNm, float focus) \{\n    if (curve == 0) \{\n      return (focus - lamNm) / max(lambdaMax - lambdaMin, 1.0f);\n    \}\n    float u  = lamNm * 0.001f;\n    float uf = focus * 0.001f;\n    float B  = (curve == 2) ? 0.01342f : 0.00420f;\n    return (B / max(u * u, 1.0e-8f)) - (B / max(uf * uf, 1.0e-8f));\n  \}\n\n  float smstep(float e0, float e1, float x) \{\n    float t = clamp((x - e0) / max(e1 - e0, 1.0e-8f), 0.0f, 1.0f);\n    return t * t * (3.0f - 2.0f * t);\n  \}\n\n  void init() \{\n    n = samples;\n    if (n < 3) n = 3;\n    if (n > 32) n = 32;\n\n    float l0 = min(lambdaMin, lambdaMax);\n    float l1 = max(lambdaMin, lambdaMax);\n    if (l1 - l0 < 1.0f) l1 = l0 + 1.0f;\n    float focus = clamp(focusNm, l0, l1);\n\n    float sign = (invert != 0) ? -1.0f : 1.0f;\n    float maxAbs = 1.0e-4f;\n    int i;\n    for (i = 0; i < 32; i++) \{\n      wRGB\[i] = float3(0.0f, 0.0f, 0.0f);\n      disp\[i] = 0.0f;\n      if (i < n) \{\n        float t = (n > 1) ? float(i) / float(n - 1) : 0.5f;\n        float lam = l0 + t * (l1 - l0);\n        float d = iorDelta(lam, focus);\n        disp\[i] = d;\n        float ad = fabs(d);\n        if (ad > maxAbs) maxAbs = ad;\n      \}\n    \}\n\n    float3 sumW = float3(0.0f, 0.0f, 0.0f);\n    for (i = 0; i < 32; i++) \{\n      if (i < n) \{\n        float t = (n > 1) ? float(i) / float(n - 1) : 0.5f;\n        float lam = l0 + t * (l1 - l0);\n        disp\[i] = (disp\[i] / maxAbs) * sign;\n\n        float3 xyz = float3(cmfX(lam), cmfY(lam), cmfZ(lam));\n        float3 rgb = xyzToRec709(xyz);\n        rgb = float3(max(rgb.x, 0.0f), max(rgb.y, 0.0f), max(rgb.z, 0.0f));\n        float lum = (rgb.x + rgb.y + rgb.z) * 0.33333334f;\n        float sat = clamp(fringeSat, 0.0f, 2.0f);\n        rgb = float3(\n          lum + (rgb.x - lum) * sat,\n          lum + (rgb.y - lum) * sat,\n          lum + (rgb.z - lum) * sat\n        );\n        wRGB\[i] = rgb;\n        sumW += rgb;\n      \}\n    \}\n\n    sumW = float3(max(sumW.x, 1.0e-8f), max(sumW.y, 1.0e-8f), max(sumW.z, 1.0e-8f));\n    for (i = 0; i < 32; i++) \{\n      if (i < n) \{\n        wRGB\[i] = float3(wRGB\[i].x / sumW.x, wRGB\[i].y / sumW.y, wRGB\[i].z / sumW.z);\n      \}\n    \}\n\n    float2 fs = formatSize;\n    if (fs.x < 1.0f) fs.x = 1.0f;\n    if (fs.y < 1.0f) fs.y = 1.0f;\n    float asp = (aspect <= 0.0f) ? 1.0f : aspect;\n    maxRadius = 0.5f * length(float2(fs.x, fs.y * asp));\n    if (maxRadius < 1.0f) maxRadius = 1.0f;\n  \}\n\n  void process(int2 pos) \{\n    float2 p = float2(float(pos.x) + 0.5f, float(pos.y) + 0.5f);\n    SampleType(src) srcCol = bilinear(src, p.x, p.y);\n\n    float2 c = center;\n    float asp = (aspect <= 0.0f) ? 1.0f : aspect;\n    float2 v = p - c;\n    v.y *= asp;\n    float rNorm = length(v) / maxRadius;\n\n    float fade = 1.0f;\n    if (protect >= 0.999f) \{\n      fade = 0.0f;\n    \} else if (protect > 0.0f) \{\n      fade = smstep(protect, 1.0f, rNorm);\n      fade = pow(max(fade, 0.0f), max(falloff, 0.01f));\n    \}\n\n    float amountEff = amount * fade;\n    if (fabs(amountEff) < 1.0e-8f) \{\n      dst() = srcCol;\n      return;\n    \}\n\n    float ang = angleDeg * 0.017453292519943295f;\n    float2 dirLin = float2(cos(ang), sin(ang));\n    float spinMax = spinDeg * 0.017453292519943295f;\n\n    float3 acc = float3(0.0f, 0.0f, 0.0f);\n    float aMax = srcCol.w;\n\n    int i;\n    for (i = 0; i < 32; i++) \{\n      if (i < n) \{\n        float d = disp\[i] * amountEff;\n        float2 dir = v;\n\n        if (mode == 2 || mode == 3) \{\n          float th = spinMax * disp\[i] * fade;\n          float cs = cos(th);\n          float sn = sin(th);\n          dir = float2(dir.x * cs - dir.y * sn, dir.x * sn + dir.y * cs);\n        \}\n\n        float2 sPos = p;\n        if (mode == 1) \{\n          sPos = p - float2(dirLin.x, dirLin.y / asp) * (d * maxRadius);\n        \} else if (mode == 2) \{\n          dir.y /= asp;\n          sPos = c + dir;\n        \} else \{\n          float scale = 1.0f + d;\n          if (fabs(scale) < 1.0e-4f) scale = (scale < 0.0f) ? -1.0e-4f : 1.0e-4f;\n          dir = dir / scale;\n          dir.y /= asp;\n          sPos = c + dir;\n        \}\n\n        SampleType(src) s = bilinear(src, sPos.x, sPos.y);\n        acc.x += s.x * wRGB\[i].x;\n        acc.y += s.y * wRGB\[i].y;\n        acc.z += s.z * wRGB\[i].z;\n        if (s.w > aMax) aMax = s.w;\n      \}\n    \}\n\n    float4 outp;\n    outp.x = acc.x;\n    outp.y = acc.y;\n    outp.z = acc.z;\n    outp.w = (alphaMode == 1) ? aMax : srcCol.w;\n    dst() = outp;\n  \}\n\};\n"
  rebuild ""
  SpectralCA_amount {{parent.amount}}
  SpectralCA_samples {{parent.samples}}
  SpectralCA_focusNm {{parent.focusNm}}
  SpectralCA_lambdaMin {{parent.lambdaMin}}
  SpectralCA_lambdaMax {{parent.lambdaMax}}
  SpectralCA_mode {{parent.mode}}
  SpectralCA_curve {{parent.curve}}
  SpectralCA_invert {{parent.invert}}
  SpectralCA_alphaMode {{parent.alphaMode}}
  SpectralCA_center {{parent.center.x} {parent.center.y}}
  SpectralCA_formatSize {{width} {height}}
  SpectralCA_aspect {{parent.aspect}}
  SpectralCA_protect {{parent.protect}}
  SpectralCA_falloff {{parent.falloff}}
  SpectralCA_angleDeg {{parent.angleDeg}}
  SpectralCA_spinDeg {{parent.spinDeg}}
  SpectralCA_fringeSat {{parent.fringeSat}}
  rebuild_finalise ""
  name SpectralCA_kernel
  xpos 0
  ypos -200
 }
 Merge2 {
  inputs 2+1
  operation copy
  name MergeOut
  xpos 0
  ypos -80
 }
 CopyBBox {
  inputs 2
  name CopyBBox1
  xpos 0
  disable {{!parent.preserveBBox}}
 }
 Output {
  name Output1
  xpos 0
  ypos 80
 }
end_group