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This commit is contained in:
Eryn Wells 2018-10-11 16:45:01 -07:00
parent e212a338d7
commit cb8afac46f
1 changed files with 3 additions and 0 deletions
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MetaballsKit/Renderer.swift
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@ -168,6 +168,7 @@ public class Renderer: NSObject, MTKViewDelegate {
buffer.label = "Metaballs Command Buffer" buffer.label = "Metaballs Command Buffer"
var didEncode = false var didEncode = false
// Render the per-pixel metaballs
if let pipeline = pixelPipeline, if let pipeline = pixelPipeline,
let encoder = buffer.makeRenderCommandEncoder(descriptor: renderPass) { let encoder = buffer.makeRenderCommandEncoder(descriptor: renderPass) {
encoder.label = "Pixel Render" encoder.label = "Pixel Render"
@ -181,6 +182,8 @@ public class Renderer: NSObject, MTKViewDelegate {
didEncode = true didEncode = true
} }
// Render the marching squares version over top of the pixel version.
// We need our own render pass descriptor that specifies that we load the results of the previous pass to make this render pass appear on top of the other.
let pass = renderPass.copy() as! MTLRenderPassDescriptor let pass = renderPass.copy() as! MTLRenderPassDescriptor
pass.colorAttachments[0].loadAction = .load pass.colorAttachments[0].loadAction = .load
if let pipeline = marchingSquaresPipeline, if let pipeline = marchingSquaresPipeline,