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Move the render queue to the Diamond-Square object

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Eryn Wells 2018-11-11 22:12:25 -05:00
parent e62dd1b0f2
commit f0d6177567
2 changed files with 24 additions and 15 deletions
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32
Terrain2/Algorithms.swift
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@ -22,7 +22,7 @@ protocol TerrainGenerator {
func updateUniforms()
func encode(in encoder: MTLComputeCommandEncoder)
func render()
func render(completion: @escaping () -> Void)
}
class Kernel {
@ -96,7 +96,7 @@ class ZeroAlgorithm: Kernel, TerrainGenerator {
func updateUniforms() { }
func render() { }
func render(completion: @escaping () -> Void) { }
}
/// Randomly generate heights that are independent of all others.
@ -130,7 +130,7 @@ class RandomAlgorithm: Kernel, TerrainGenerator {
RandomAlgorithmUniforms_refreshRandoms(uniforms)
}
func render() { }
func render(completion: @escaping () -> Void) { }
}
/// Implementation of the Diamond-Squares algorithm.
@ -234,6 +234,8 @@ public class DiamondSquareGenerator: TerrainGenerator {
struct Algorithm {
let grid: Box
private let queue = DispatchQueue(label: "Diamond-Square Algorithm Queue")
var roughness: Float = 1.0 {
didSet {
randomRange = -roughness...roughness
@ -248,7 +250,14 @@ public class DiamondSquareGenerator: TerrainGenerator {
}
/// Run the algorithm and return the genreated height map.
func render() -> [Float] {
func render(completion: @escaping ([Float]) -> Void) {
queue.async {
let heightMap = self.queue_render()
completion(heightMap)
}
}
func queue_render() -> [Float] {
var heightMap = [Float](repeating: 0, count: grid.size.w * grid.size.h)
// 0. Set the corners to initial values if they haven't been set yet.
@ -351,12 +360,15 @@ public class DiamondSquareGenerator: TerrainGenerator {
algorithm = Algorithm(grid: Box(origin: Point(), size: Size(w: DiamondSquareGenerator.textureSize.width, h: DiamondSquareGenerator.textureSize.height)))
}
func render() {
let heightMap = algorithm.render()
let region = MTLRegion(origin: MTLOrigin(), size: DiamondSquareGenerator.textureSize)
let newActiveTexture = (activeTexture + 1) % textures.count
textures[newActiveTexture].replace(region: region, mipmapLevel: 0, withBytes: heightMap, bytesPerRow: MemoryLayout<Float>.stride * DiamondSquareGenerator.textureSize.width)
activeTexture = newActiveTexture
func render(completion: @escaping () -> Void) {
algorithm.render { (heightMap: [Float]) in
let region = MTLRegion(origin: MTLOrigin(), size: DiamondSquareGenerator.textureSize)
let newActiveTexture = (self.activeTexture + 1) % self.textures.count
self.textures[newActiveTexture].replace(region: region, mipmapLevel: 0, withBytes: heightMap, bytesPerRow: MemoryLayout<Float>.stride * DiamondSquareGenerator.textureSize.width)
self.activeTexture = newActiveTexture
completion()
}
}
// MARK: Algorithm

7
Terrain2/Renderer.swift
View file

@ -38,8 +38,6 @@ class Renderer: NSObject, MTKViewDelegate {
let inFlightSemaphore = DispatchSemaphore(value: maxBuffersInFlight)
let regenerationSemaphore = DispatchSemaphore(value: 1)
let generatorQueue = DispatchQueue(label: "me.erynwells.Terrain.generatorQueue")
var uniformBufferOffset = 0
var uniformBufferIndex = 0
var uniforms: UnsafeMutablePointer<Uniforms>
@ -171,9 +169,8 @@ class Renderer: NSObject, MTKViewDelegate {
func scheduleAlgorithmIteration() {
regenerationSemaphore.wait()
if !terrain.generator.needsGPU {
generatorQueue.async {
print("Rendering terrain...")
self.terrain.generator.render()
print("Rendering terrain...")
self.terrain.generator.render {
print("Rendering terrain...complete!")
self.didUpdateTerrain = true
}