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Let the delegate provide the marchingSquares instance

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This commit is contained in:
Eryn Wells 2018-10-14 08:27:45 -07:00
parent 4cc2b315a1
commit 7399d2d187
3 changed files with 27 additions and 23 deletions
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38
MetaballsKit/Renderer.swift
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@ -13,9 +13,10 @@ public enum RendererError: Error {
case MetalError(String)
}
public protocol RendererDelegate {
protocol RendererDelegate {
var renderSize: Size { get set }
var field: Field { get }
var marchingSquares: MarchingSquares { get }
var metalView: MTKView { get }
}
@ -29,7 +30,7 @@ struct Vertex {
}
public class Renderer: NSObject, MTKViewDelegate {
public var delegate: RendererDelegate? = nil {
var delegate: RendererDelegate? = nil {
didSet {
guard let delegate = delegate else {
return
@ -41,7 +42,8 @@ public class Renderer: NSObject, MTKViewDelegate {
configurePixelPipeline(withPixelFormat: view.colorPixelFormat)
configureMarchingSquaresPipeline(withPixelFormat: view.colorPixelFormat)
try! delegate.field.setupMetal(withDevice: device)
delegate.field.setupMetal(withDevice: device)
delegate.marchingSquares.setupMetal(withDevice: device)
}
}
@ -80,7 +82,7 @@ public class Renderer: NSObject, MTKViewDelegate {
super.init()
}
public convenience init(delegate: RendererDelegate) throws {
convenience init(delegate: RendererDelegate) throws {
self.init()
self.delegate = delegate
}
@ -223,19 +225,21 @@ public class Renderer: NSObject, MTKViewDelegate {
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
pass.colorAttachments[0].loadAction = .load
if let pipeline = marchingSquaresPipeline,
let encoder = buffer.makeRenderCommandEncoder(descriptor: pass) {
encoder.label = "Marching Squares Render"
encoder.setRenderPipelineState(pipeline)
encoder.setVertexBuffer(field.marchingSquares.gridGeometry, offset: 0, index: 0)
encoder.setVertexBuffer(parametersBuffer, offset: 0, index: 1)
encoder.drawPrimitives(type: .line, vertexStart: 0, vertexCount: field.marchingSquares.gridVertexCount)
encoder.endEncoding()
didEncode = true
if let marchingSquares = delegate?.marchingSquares {
// 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
pass.colorAttachments[0].loadAction = .load
if let pipeline = marchingSquaresPipeline,
let encoder = buffer.makeRenderCommandEncoder(descriptor: pass) {
encoder.label = "Marching Squares Render"
encoder.setRenderPipelineState(pipeline)
encoder.setVertexBuffer(marchingSquares.gridGeometry, offset: 0, index: 0)
encoder.setVertexBuffer(parametersBuffer, offset: 0, index: 1)
encoder.drawPrimitives(type: .line, vertexStart: 0, vertexCount: marchingSquares.gridVertexCount)
encoder.endEncoding()
didEncode = true
}
}
}