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[Metaballs] Alpha blend~

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This commit is contained in:
Eryn Wells 2017-08-06 12:12:07 -07:00
parent 1f2469f686
commit 861c8a149b
2 changed files with 37 additions and 14 deletions
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13
Metaballs/Renderer.swift
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@ -58,7 +58,18 @@ class Renderer: NSObject, MTKViewDelegate {
pipelineStateDescriptor.label = "Render Pipeline"
pipelineStateDescriptor.vertexFunction = vertexShader
pipelineStateDescriptor.fragmentFunction = fragmentShader
pipelineStateDescriptor.colorAttachments[0].pixelFormat = view.colorPixelFormat
if let renderAttachment = pipelineStateDescriptor.colorAttachments[0] {
renderAttachment.pixelFormat = view.colorPixelFormat
// Pulled all this from SO. I don't know what all this does...
// https://stackoverflow.com/q/43727335/1174185
renderAttachment.isBlendingEnabled = true
renderAttachment.alphaBlendOperation = .add
renderAttachment.rgbBlendOperation = .add
renderAttachment.sourceRGBBlendFactor = .sourceAlpha
renderAttachment.sourceAlphaBlendFactor = .sourceAlpha
renderAttachment.destinationRGBBlendFactor = .oneMinusSourceAlpha
renderAttachment.destinationAlphaBlendFactor = .oneMinusSourceAlpha
}
renderPipelineState = try device.makeRenderPipelineState(descriptor: pipelineStateDescriptor)
commandQueue = device.makeCommandQueue()