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Questions tagged [alpha]

An alpha channel determines the transparency of an image or view. Lower values are more transparent, and higher values are more opaque

An alpha channel determines the transparency of an image or view. Lower values are more transparent, and higher values are more opaque

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Is there a cheaper (performance-wise) alternative for changing alpha values?

I've noticed that setting (decreasing) the alpha value of a view is a very expensive operation. I've tried using it in my view/page transformers and I have no choice but to just remove it. And it's not just limited to transformers and the likes.…
Sid Go
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Coreplot - change alpha of gradient

I am trying to change alpha of the gradients I am using below my scatter plot: //add gradient to line CPTColor *underLineGradientStartColor = [CPTColor colorWithComponentRed:CPTFloat(0.4) green:CPTFloat(0.2) blue:CPTFloat(0.9)…
izik461
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The problem with alpha channel MovieClip (Actionscript3)

Here is my code: var menu = new Menu (); menu.x = 0; menu.y = 0; addChild (menu); menu.alpha = 0; TweenLite.to (menu, 10, (alpha: 1)); This works, but transparency varies for each element MovieClip separately, but I would like that would have…
Kir
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iOS: Overlay two images with Alpha offscreen

sorry, for this question, I know there is a similar question, but I can not get the answer to work. Probably some dumb error on my side ;-) I want to overlay two images with Alpha on iOS. The images taken from two videos, read by an AssetReader and…
BetaVersion
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OpenGL - Performing depth peeling in a scene with opaque objects

I'm trying to perform the depth peeling algorithm, to draw in correct order transparent objects in a scene already full of opaque objects (A terrain that almost occludes the transparent objects most of the time). I have already separated the draw…
Ivelate
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Corona alpha transpency with display.newImage

I want to display an image which has some alpha=50% transparency but my alpha is displayed as solid. I'm using display.newImage. How do I use alphas? Many Thanks :)
Jason Bullen
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svg luminanceToAlpha reverse?

Is there a way to reverse a luminanceToAlpha? From this: To This
Dennis Betman
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Imagemagick convert command adds noise to the png-to-png export result

I'm trying to convert an not-optimized PNG to an optimized version using ImageMagick's convert command: convert -colors 40 test.png test-optimized.png The problem is however that the convert operation adds weird noise. I want multiple levels of…
murb
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iOS: alpha relating visual effect

My goal is to achieve something like this. There is a background, above the background I added a view with an alpha set to 0.9 and background set to black. The bubbles are UIButtons, and I want to highlight them when they are clicked. But I don't…
Huang C.
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How to apply the alphaMaskFilter in Flash CC using Easel.js?

I am working in a canvas document using Flash CC and have the following labeled moveclips on the stage mask_mc (which is a movieclip with a alpha gradient) and logo. The objective is to create a sheen going across the logo. var mask_mc =…
user2163224
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LWGJL Blending Issues

I'm trying to use a lightmap to create an effect like this, but doing it only with blending functions and rendering: https://www.youtube.com/watch?v=JkyGTZ0992s Basically, have the light map have 100% transparency when it's all white and have it…
SirTrashyton
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Convert black parts of an image to transparent parts by batch file

Hi guys I'm an animator working with textures that some of them need to Convert black parts of an image to transparent parts and it's really boring to sit and all the day do it with photoshop can't I do it with a batch file?tnx.
kmthrong kmthrongi
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Are images in Android global?

This is a strange problem -- may be not a problem. Before the last step to finish writing a application, I would use icon to replace any image. That is, all the things like
Henry Sou
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Creating texture with varying alpha values for drawing anti-aliased lines in OpenGL-ES

I am working on drawing anti-aliased lines in OpenGL-ES on iPhone. I am using an approach outlined in iPhone 3D Programming, called "Rendering Anti-Aliased Lines with Textures". The basis idea is to iterate through the line creating a bounding…
westsider
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three.js Alpha failing to blend

What it should look like. What it does look like. So I have an object that has transparency enabled, the things surrounding the central object. If alpha is turned up to 1 they look just as they should. But they are meant to be alpha blended, and…
Hamish Todd
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