图像效果 — 滤镜、生成器、合成

在 Solar2D 中，可以以前所未有的轻松程度将视觉效果应用于显示对象。本指南列出了所有内置着色器效果。或者，若要创建您自己的自定义效果，请参阅 自定义着色器效果 指南。

注意

除了下面列出的内置着色器效果之外，您还可以编写/实现自定义效果。有关详细信息，请参阅 自定义着色器效果 指南。

滤镜效果

滤镜效果针对单个纹理/图像运行，由作为 object.fill 或 object.stroke 的 effect 属性的滤镜名称（字符串）指定

object.fill.effect = "[filter]"
object.stroke.effect = "[filter]"

大多数滤镜可以通过可选项来调整。这些选项以及可接受的值对于每个特定滤镜都有所不同，如下所示。

可以在应用滤镜后明确设置滤镜选项，甚至可以在渐进过渡的过程中设置。例如

-- Set a "sepia" filter with a non-default intensity
object.fill.effect = "filter.sepia"
object.fill.effect.intensity = 0.2

-- Transition the filter to full intensity over the course of 2 seconds
transition.to( object.fill.effect, { time=2000, intensity=1 } )
 → 

filter.bloom

渲染从图像中亮区边框延伸的光亮边缘，给人极其明亮的光束压倒视觉的感觉。

  • levels.white — 默认值 = 0.843；最小值 = 0；最大值 = 1
  • levels.black — 默认值 = 0.565；最小值 = 0；最大值 = 1
  • levels.gamma — 默认 = 1；最小值 = 0；最大值 = 1
  • add.alpha — 默认 = 1；最小值 = 0；最大值 = 1
  • blur.horizontal.blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • blur.horizontal.sigma — 默认 = 128；最小值 = 2；最大值 = 512
  • blur.vertical.blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • blur.vertical.sigma — 默认 = 128；最小值 = 2；最大值 = 512
object.fill.effect = "filter.bloom"

object.fill.effect.levels.white = 0.8
object.fill.effect.levels.black = 0.4
object.fill.effect.levels.gamma = 1
object.fill.effect.add.alpha = 0.8
object.fill.effect.blur.horizontal.blurSize = 20
object.fill.effect.blur.horizontal.sigma = 140
object.fill.effect.blur.vertical.blurSize = 20
object.fill.effect.blur.vertical.sigma = 240
 → 

filter.blur

object.fill.effect = "filter.blur"
 → 

filter.blurGaussian

  • horizontal.blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • horizontal.sigma — 默认 = 128；最小值 = 2；最大值 = 512
  • vertical.blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • vertical.sigma — 默认 = 128；最小值 = 2；最大值 = 512
object.fill.effect = "filter.blurGaussian"

object.fill.effect.horizontal.blurSize = 20
object.fill.effect.horizontal.sigma = 140
object.fill.effect.vertical.blurSize = 20
object.fill.effect.vertical.sigma = 140
 → 

filter.blurGaussianLinear

一种轻量级的对数模糊处理技术，如这篇 RasterGrid 文章 所述。

  • horizontal.offset1 — 默认 = 1.3846153846；最小值 = 0；最大值 = 100
  • horizontal.offset2 — 默认 = 3.2307692308；最小值 = 0；最大值 = 100
  • vertical.offset1 — 默认 = 1.3846153846；最小值 = 0；最大值 = 100
  • vertical.offset2 — 默认 = 3.2307692308；最小值 = 0；最大值 = 100
object.fill.effect = "filter.blurGaussianLinear"
 → 

filter.blurGaussianLinearHorizontal

  • offset1 — 默认 = 1.3846153846；最小值 = 0；最大值 = 100
  • offset2 — 默认 = 3.2307692308；最小值 = 0；最大值 = 100
object.fill.effect = "filter.blurGaussianLinearHorizontal"
 → 

filter.blurGaussianLinearVertical

  • offset1 — 默认 = 1.3846153846；最小值 = 0；最大值 = 100
  • offset2 — 默认 = 3.2307692308；最小值 = 0；最大值 = 100
object.fill.effect = "filter.blurGaussianLinearVertical"
 → 

filter.blurHorizontal

  • blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • sigma — 默认 = 128；最小值 = 2；最大值 = 512
object.fill.effect = "filter.blurHorizontal"

object.fill.effect.blurSize = 20
object.fill.effect.sigma = 140
 → 

filter.blurVertical

  • blurSize — 默认 = 8；最小值 = 2；最大值 = 512
  • sigma — 默认 = 128；最小值 = 2；最大值 = 512
object.fill.effect = "filter.blurVertical"

object.fill.effect.blurSize = 20
object.fill.effect.sigma = 140
 → 

filter.brightness

  • intensity — 默认 = 0；最小值 = 0；最大值 = 1
object.fill.effect = "filter.brightness"

object.fill.effect.intensity = 0.4
 → 

filter.bulge

通过改变眼睛的光线方向提供镜头凸出的错觉。1 以下的强度使效果向内凸出（凹形）。1 以上的强度使效果向外凸出（凸形）。

  • intensity — 默认 = 1；最小值 = 0；最大值 = (无)
object.fill.effect = "filter.bulge"

object.fill.effect.intensity = 1.8
 → 

filter.chromaKey

  • sensitivity — 默认 = 0.4；最小值 = 0；最大值 = 1
  • smoothing — 默认 = 0.1；最小值 = 0；最大值 = 1
  • color — 默认 = {1,1,1,1}；最小值 = {0,0,0,0}；最大值 = {1,1,1,1}
object.fill.effect = "filter.chromaKey"

object.fill.effect.sensitivity = 0.1
object.fill.effect.smoothing = 0.3
object.fill.effect.color = { 0.2, 0.2, 0.2, 1 }
 → 

filter.colorChannelOffset

  • xTexels — 默认 = 8；最小值 = 0；最大值 = (无)
  • yTexels — 默认 = 8；最小值 = 0；最大值 = (无)
object.fill.effect = "filter.colorChannelOffset"

object.fill.effect.xTexels = 16
object.fill.effect.yTexels = 16
 → 

filter.colorMatrix

对源颜色进行乘法处理，并为图像的每个颜色分量增加一个偏移量（偏差）。

  • coefficients — 一个 4x4 的 RGB+A 系数矩阵。
  • bias — 默认 = {0,0,0,0}；最小值 = {-1,-1,-1,-1}；最大值 = {1,1,1,1}
object.fill.effect = "filter.colorMatrix"

object.fill.effect.coefficients =
{
    1, 0, 0, 0,  --red coefficients
    0, 1, 0, 0,  --green coefficients
    0, 0, 1, 0,  --blue coefficients
    0, 0, 0, 1   --alpha coefficients
}
object.fill.effect.bias = { 0.6, 0.1, 0, 0 }
 → 

filter.colorPolynomial

向图像应用一组三次多项式。

  • coefficients — 一个 4x4 的 RGB+A 系数矩阵。
object.fill.effect = "filter.colorPolynomial"

object.fill.effect.coefficients =
{
    0, 0, 1, 0,  --red coefficients
    0, 0, 1, 0,  --green coefficients
    0, 1, 0, 0,  --blue coefficients
    0, 0, 0, 1   --alpha coefficients
}
 → 

filter.contrast

  • contrast — 默认 = 1；最小值 = 0；最大值 = 4
object.fill.effect = "filter.contrast"

object.fill.effect.contrast = 2
 → 

filter.crosshatch

  • grain — 默认 = 0；最小值 = 0；最大值 = (无)
object.fill.effect = "filter.crosshatch"

object.fill.effect.grain = 4
 → 

filter.crystallize

  • numTiles — 默认 = 16；最小值 = 2；最大值 = (无)
object.fill.effect = "filter.crystallize"

object.fill.effect.numTiles = 32
 → 

filter.desaturate

  • intensity — 默认 = 0.5；最小值 = 0；最大值 = 1
object.fill.effect = "filter.desaturate"

object.fill.effect.intensity = 0.5
 → 

filter.dissolve

  • threshold — 默认 = 1；最小值 = 0；最大值 = 1
object.fill.effect = "filter.dissolve"

object.fill.effect.threshold = 0.6
 → 

filter.duotone

通过使用不同颜色来再现不同灰度级别，增加灰度图像的色调范围。

  • darkColor — 默认 = {0,0,0.5,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • lightColor — 默认 = {1,0,0,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
object.fill.effect = "filter.duotone"

object.fill.effect.darkColor = { 0.7, 0.3, 0.3, 1 }
object.fill.effect.lightColor = { 1, 0.6, 0.4, 1 }
 → 

filter.emboss

  • intensity — 默认 = 1；最小 = 0；最大 = 4
object.fill.effect = "filter.emboss"

object.fill.effect.intensity = 0.2
 → 

filter.exposure

  • exposure — 默认 = 0；最小 = -10；最大 = 10
object.fill.effect = "filter.exposure"

object.fill.effect.exposure = 1.2
 → 

filter.frostedGlass

  • scale — 默认 = 64；最小 = 1；最大 = （无）
object.fill.effect = "filter.frostedGlass"

object.fill.effect.scale = 140
 → 

filter.grayscale

object.fill.effect = "filter.grayscale"
 → 

filter.hue

  • angle — 默认 = 0；最小 = 0；最大 = 360
object.fill.effect = "filter.hue"

object.fill.effect.angle = 200
 → 

filter.invert

object.fill.effect = "filter.invert"
 → 

filter.iris

  • center — 默认 = {0.5,0.5}；最小 = {0,0}；最大 = {1,1}
  • aperture — 默认 = 0；最小 = 0 （关闭）；最大 = 1 （打开）
  • aspectRatio — 默认 = 1；最小 = 0；最大 = （无）
  • smoothness — 默认 = 0；最小 = 0；最大 = 1
object.fill.effect = "filter.iris"

object.fill.effect.center = { 0.5, 0.5 }
object.fill.effect.aperture = 0.5
object.fill.effect.aspectRatio = ( object.width / object.height )
object.fill.effect.smoothness = 0.5
 → 

filter.levels

  • white — 默认 = 0.843；最小 = 0；最大 = 1
  • black — 默认 = 0.565；最小 = 0；最大 = 1
  • gamma — 默认 = 1；最小 = 0；最大 = 1
object.fill.effect = "filter.levels"

object.fill.effect.white = 0.5
object.fill.effect.black = 0.1
object.fill.effect.gamma = 1
 → 

filter.linearWipe

  • direction — 默认 = {1,0}；最小 = {-1,-1}；最大 = {1,1}
  • smoothness — 默认 = 0；最小 = 0；最大 = 1
  • progress — 默认 = 0；最小 = 0；最大 = 1
object.fill.effect = "filter.linearWipe"

object.fill.effect.direction = { 1, 1 }
object.fill.effect.smoothness = 1
object.fill.effect.progress = 0.5
 → 

filter.median

object.fill.effect = "filter.median"
 → 

filter.monotone

  • r — 默认 = 0；最小 = 0；最大 = 1
  • g — 默认 = 0；最小 = 0；最大 = 1
  • b — 默认 = 0；最小 = 0；最大 = 1
  • a — 默认 = 1；最小 = 0；最大 = 1
object.fill.effect = "filter.monotone"

object.fill.effect.r = 1
object.fill.effect.g = 0.2
object.fill.effect.b = 0.5
object.fill.effect.a = 0.5
 → 

filter.opTile

  • numPixels — 默认 = 8；最小 = 0；最大 = （无）
  • angle — 默认 = 0；最小 = 0；最大 = 360
  • scale — 默认 = 2.8；最小 = 0；最大 = （无）
object.fill.effect = "filter.opTile"

object.fill.effect.numPixels = 4
object.fill.effect.angle = 0
object.fill.effect.scale = 3
 → 

filter.pixelate

  • numPixels — 默认 = 4；最小 = 0；最大 = （无）
object.fill.effect = "filter.pixelate"

object.fill.effect.numPixels = 4
 → 

filter.polkaDots

  • numPixels — 默认 = 4；最小 = 4；最大 = （无）
  • dotRadius — 默认 = 1；最小 = 0；最大 = 1
  • aspectRatio — 默认 = 1；最小 = 0；最大 = （无）
object.fill.effect = "filter.polkaDots"

object.fill.effect.numPixels = 16
object.fill.effect.dotRadius = 1
object.fill.effect.aspectRatio = ( object.width / object.height )
 → 

filter.posterize

  • colorsPerChannel — 默认 = 4；最小 = 2；最大 = （无）
object.fill.effect = "filter.posterize"

object.fill.effect.colorsPerChannel = 6
 → 

filter.radialWipe

  • center — 默认 = {0.5,0.5}；最小 = {-1,-1}；最大 = {1,1}
  • smoothness — 默认 = 0；最小 = 0；最大 = 1
  • axisOrientation — 默认 = 0；最小 = 0；最大 = 1
  • progress — 默认 = 0；最小 = 0；最大 = 1
object.fill.effect = "filter.radialWipe"

object.fill.effect.center = { 0.3, 0.5 }
object.fill.effect.smoothness = 1
object.fill.effect.axisOrientation = 0
object.fill.effect.progress = 0.5
 → 

filter.saturate

  • intensity — 默认 = 1；最小 = 0；最大 = 8
object.fill.effect = "filter.saturate"

object.fill.effect.intensity = 4
 → 

filter.scatter

  • intensity — 默认 = 0.5；最小 = 0；最大 = （无）
object.fill.effect = "filter.scatter"

object.fill.effect.intensity = 0.5
 → 

filter.sepia

  • intensity — 默认 = 1；最小 = 0；最大 = 1
object.fill.effect = "filter.sepia"

object.fill.effect.intensity = 1
 → 

filter.sharpenLuminance

  • sharpness — 默认 = 0；最小 = 0；最大 = 1
object.fill.effect = "filter.sharpenLuminance"

object.fill.effect.sharpness = 1
 → 

filter.sobel

object.fill.effect = "filter.sobel"
 → 

filter.straighten

  • width — 默认 = 1；最小 = 1；最大 = （无）
  • height — 默认 = 1；最小 = 1；最大 = （无）
  • angle — 默认 = 0；最小 = 0；最大 = 360
object.fill.effect = "filter.straighten"

object.fill.effect.width = 10
object.fill.effect.height = 40
object.fill.effect.angle = 20
 → 

filter.swirl

  • intensity — 默认 = 0；最小 = 0；最大 = （无）
object.fill.effect = "filter.swirl"

object.fill.effect.intensity = 0.4
 → 

filter.vignette

  • radius — 默认 = 0.1；最小 = 0；最大 = 1
object.fill.effect = "filter.vignette"

object.fill.effect.radius = 0.1
 → 

filter.vignetteMask

  • innerRadius — 默认 = 0.8；最小 = 0；最大 = 1
  • outerRadius — 默认 = 0.25；最小 = 0；最大 = 1
object.fill.effect = "filter.vignetteMask"

object.fill.effect.innerRadius = 0.7
object.fill.effect.outerRadius = 0.1
 → 

filter.wobble

  • amplitude — 默认 = 10；最小 = （无）；最大 = （无）
object.fill.effect = "filter.wobble"

object.fill.effect.amplitude = 80
 → 

filter.woodCut

  • intensity — 默认 = 0.5；最小值 = 0；最大值 = 1
object.fill.effect = "filter.woodCut"

object.fill.effect.intensity = 0.4
 → 

filter.zoomBlur

  • u（水平原点）— 默认 = 0.5；最小 = 0；最大 = 1
  • v (垂直原点) — 默认 = 0.5；最小 = 0；最大 = 1
  • intensity — 默认 = 0.5；最小值 = 0；最大值 = 1
object.fill.effect = "filter.zoomBlur"

object.fill.effect.u = 0.5
object.fill.effect.v = 0.5
object.fill.effect.intensity = 0.3

生成器效果

生成器效果是程序生成的无需在任何纹理/图像上操作的效果。取而代之的是，它们在片段着色器中生成纹理。

与滤镜一样，生成器也由效果名称（字符串）指定，作为 object.fill 或 object.stroke 的 effect 属性

object.fill.effect = "[generator]"
object.stroke.effect = "[generator]"

大多数生成器可以通过可选参数进行调整。对于每个特定生成器来说，这些参数和可接受的值根据下文定义而有所不同。

-- Apply a "sunbeams" generator effect
object.fill.effect = "generator.sunbeams"
object.fill.effect.aspectRatio = ( object.width / object.height )

generator.checkerboard

  • color1 — 默认 = {1,0,0,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • color2 — 默认 = {0,0,1,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • xStep — 默认 = 3；最小 = 1；最大 =（无）
  • yStep — 默认 = 3；最小 = 1；最大 =（无）
object.fill.effect = "generator.checkerboard"

object.fill.effect.color1 = { 0.8, 0, 0.2, 1 }
object.fill.effect.color2 = { 0.2, 0.2, 0.2, 1 }
object.fill.effect.xStep = 8
object.fill.effect.yStep = 8

generator.lenticularHalo

在对象上渲染镜状光晕效果。尽管示例图像表示相反，但此效果是使用透明阿尔法背景生成的。seed 参数由随机算法使用，并作为改变光晕外观的手段提供。

  • posX — 默认 = 0.5；最小 = 0；最大 = 1
  • posY — 默认 = 0.5；最小 = 0；最大 = 1
  • aspectRatio — 默认 = 1；最小 = 0；最大 = （无）
  • seed — 默认 = 0；最小 = 0；最大 =（无）
object.fill.effect = "generator.lenticularHalo"

object.fill.effect.posX = 0.5
object.fill.effect.posY = 0.5
object.fill.effect.aspectRatio = ( object.width / object.height )
object.fill.effect.seed = 1

generator.linearGradient

  • color1 — 默认 = {1,0,0,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • position1 — 默认 = {0,0}；最小 = {0,0}；最大 = {1,1}
  • color2 — 默认 = {0,0,1,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • position2 — 默认 = {1,1}；最小 = {0,0}；最大 = {1,1}
object.fill.effect = "generator.linearGradient"

object.fill.effect.color1 = { 0.8, 0, 0.2, 1 }
object.fill.effect.position1  = { 0, 0 }
object.fill.effect.color2 = { 0.2, 0.2, 0.2, 1 }
object.fill.effect.position2  = { 1, 1 }

generator.marchingAnts

object.strokeWidth = 2
object.stroke.effect = "generator.marchingAnts"

generator.perlinNoise

  • color1 — 默认 = {1,0,0,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • color2 — 默认 = {0,0,1,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • scale — 默认 = 8；最小 = 0；最大 =（无）
object.fill.effect = "generator.perlinNoise"

object.fill.effect.color1 = { 0.9, 0.1, 0.3, 1 }
object.fill.effect.color2 = { 0.8, 0.8, 0.8, 1 }
object.fill.effect.scale = 12

generator.radialGradient

在对象上渲染径向渐变。center_and_radiuses 参数是一个表，按顺序指定中心**x**、中心**y**、内半径和外半径。

  • color1 — 默认 = {1,0,0,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • color2 — 默认 = {0,0,1,1}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • center_and_radiuses — 默认 = {0.5,0.5,0.125,0.25}；最小 = {0,0,0,0}；最大 = {1,1,1,1}
  • aspectRatio — 默认 = 1；最小 = 0；最大 = （无）
object.fill.effect = "generator.radialGradient"

object.fill.effect.color1 = { 0.8, 0, 0.2, 1 }
object.fill.effect.color2 = { 0.2, 0.2, 0.2, 1 }
object.fill.effect.center_and_radiuses  =  { 0.5, 0.5, 0.25, 0.75 }
object.fill.effect.aspectRatio  = 1

generator.random

object.fill.effect = "generator.random"

generator.stripes

在对象上渲染条纹图案。periods 参数是一个表，按顺序指定第一条纹宽度、第一个空隙宽度、第二条纹宽度和第二个空隙宽度。translation 参数指定图案的偏移位置。

  • periods — 默认 = {1,1,1,1}；最小 = {0,0,0,0}
  • angle — 默认 = 0；最小 = 0；最大 = 360
  • translation — 默认 = 0；最小 = 0；最大 =（无）
object.fill.effect = "generator.stripes"

object.fill.effect.periods = { 8, 2, 4, 4 }
object.fill.effect.angle = 45
object.fill.effect.translation  = 0

generator.sunbeams

在对象上渲染一束光效果。尽管示例图像表示相反，但此效果是使用透明阿尔法背景生成的。seed 参数由随机算法使用，并作为改变一束光外观的手段提供。

  • posX — 默认 = 0.5；最小 = 0；最大 = 1
  • posY — 默认 = 0.5；最小 = 0；最大 = 1
  • aspectRatio — 默认 = 1；最小 = 0；最大 = （无）
  • seed — 默认 = 0；最小 = 0；最大 =（无）
object.fill.effect = "generator.sunbeams"

object.fill.effect.posX = 0.5
object.fill.effect.posY = 0.5
object.fill.effect.aspectRatio = ( object.width / object.height )
object.fill.effect.seed = 0

合成效果

复合效果对两个纹理/图像起作用，将其组合在一起作为复合绘画。一旦定义好，此复合绘画即可用于填充/描边对象，并应用复合混合效果。一个复合绘画可以包括两个不同的纹理/图像或其自身的相同纹理/图像，具体取决于您要实现的效果。

 +  
-- Create the object
local object = display.newRect( 100, 100, 160, 160 )

-- Set up the composite paint (distinct images)
local compositePaint = {
    type="composite",
    paint1={ type="image", filename="image01.png" },
    paint2={ type="image", filename="texture.png" }
}

-- Apply the composite paint as the object's fill
object.fill = compositePaint

-- Set a composite blend as the fill effect
object.fill.effect = "composite.add"
 → 

composite.add

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.add"

object.fill.alpha = 1
 → 

composite.average

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.average"

object.fill.alpha = 1
 → 

composite.colorBurn

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.colorBurn"

object.fill.alpha = 1
 → 

composite.colorDodge

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.colorDodge"

object.fill.alpha = 1
 → 

composite.darken

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.darken"

object.fill.alpha = 1
 → 

composite.difference

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.difference"

object.fill.alpha = 1
 → 

composite.exclusion

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.exclusion"

object.fill.alpha = 0.4
 → 

composite.glow

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.glow"

object.fill.alpha = 1
 → 

composite.hardLight

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.hardLight"

object.fill.alpha = 1
 → 

composite.hardMix

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.hardMix"

object.fill.alpha = 0.2
 → 

composite.lighten

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.lighten"

object.fill.alpha = 0.8
 → 

composite.linearLight

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.linearLight"

object.fill.alpha = 0.4
 → 

composite.multiply

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.multiply"

object.fill.alpha = 1
 → 

composite.negation

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.negation"

object.fill.alpha = 0.3
 → 

composite.normalMapWith1DirLight

此复合效果在表面上呈现定向光。在此效果中，dirLightDirection 是一个包含纹理空间中光方向的表。每个轴的原点和生长方向与 composite.normalMapWith1PointLight 中 pointLightPos 所述相同。此方向向量指示了光线从何处射来，而不是光线将前往何处。不必规范化此向量，因为它已经在内部完成。

dirLightColor 参数是一个包含 RGB+A 值的表，而 ambientLightIntensity 指定了强度。

  • dirLightDirection — 默认 = {1,0,0}；最小 = {0,0,0}；最大 = {1,1,1}
  • dirLightColor — 默认 = {1,1,1,1} ; 最小 = {0,0,0,0} ; 最大 = {1,1,1,1}
  • ambientLightIntensity — 默认 = 0 ; 最小 = 0 ; 最大 = （无）
object.fill = compositePaint
object.fill.effect = "composite.normalMapWith1DirLight"

object.fill.effect.dirLightDirection = { 1, 0, 0 }
object.fill.effect.dirLightColor = { 0.3, 0.4, 1, 0.8 }
object.fill.effect.ambientLightIntensity = 1
 → 

composite.normalMapWith1PointLight

这种复合效果会在表面上渲染点光。在此效果中，pointLightPos 是一个包含纹理空间中光位置的表。此 {x,y,z} 原点是左上角 {0,0,0}。正 x 向右移动，正 y 向下移动，正 z “超出屏幕”朝向观察者移动，表示距离表面的距离。z 没有最大值，但通常此值为 0 和 1 之间。

pointLightColor 参数是一个包含 RGB+A 值的表，并且 ambientLightIntensity 指定从 0 （暗）到 1（满亮）的强度。

attenuationFactors 参数是一个包含漫反射光距离衰减因子的表。在此情况下，{x,y,z} 是常量、线性和平方衰减因子。请注意，距离衰减不会影响环境光强度。要更好地了解衰减因子，请阅读 衰减 和 光的衰减。

  • pointLightPos — 默认 = {1,0,0} ; 最小 = {0,0,0} ; 最大 = {1,1,1}
  • pointLightColor — 默认 = {1,1,1,1} ; 最小 = {0,0,0,0} ; 最大 = {1,1,1,1}
  • ambientLightIntensity — 默认 = 0 ; 最小 = 0 ; 最大 = （无）
  • attenuationFactors — 默认 = {0.4,3,20} ; 最小 = {0,0,0}
object.fill = compositePaint
object.fill.effect = "composite.normalMapWith1PointLight"

object.fill.effect.pointLightPos = { 0, 1, 1 }
object.fill.effect.pointLightColor = { 1, 0.4, 0.5, 1 }
object.fill.effect.ambientLightIntensity = 1.2
object.fill.effect.attenuationFactors = { 0.4, 3, 0 }
 → 

composite.overlay

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.overlay"

object.fill.alpha = 1
 → 

composite.phoenix

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.phoenix"

object.fill.alpha = 0.5
 → 

composite.pinLight

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.pinLight"

object.fill.alpha = 1
 → 

composite.reflect

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.reflect"

object.fill.alpha = 1
 → 

composite.screen

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.screen"

object.fill.alpha = 1
 → 

composite.softLight

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.softLight"

object.fill.alpha = 1
 → 

composite.subtract

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.subtract"

object.fill.alpha = 0.8
 → 

composite.vividLight

  • alpha — 默认 = 1；最小 = 0；最大 = 1
object.fill = compositePaint
object.fill.effect = "composite.vividLight"

object.fill.alpha = 1


特定于设备的局限

硬件支持

以下视觉效果需要现代 GPU（图形处理器），并且它们可能无法在所有设备上正常运行。

要检查设备的 GPU 功能，请通过 system.getInfo( "gpuSupportsHighPrecisionFragmentShaders" ) 进行测试。

if ( system.getInfo( "gpuSupportsHighPrecisionFragmentShaders" ) ) then
    -- This device should support all effects
else
    -- This device may have problems with certain effects
end

如果设备支持高精度片段着色器，您可以按照 此处 所述为所有 OpenGL ES 着色器覆盖默认着色器精度。

渲染执行

某些参数对效果的执行时间有直接影响。这适用于初始渲染和任何重新执行事件。例如，如果移动/转换对象，则应用到该对象的重新执行效果。因此，在设置效果参数时应小心，尤其是诸如 "filter.blurGaussian" 的参数。如果可能，我们建议您在实际设备上测试适用的项目。