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Generate terrain on a keypress

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This commit is contained in:
Eryn Wells 2018-11-04 14:19:02 -05:00
parent 55a134882d
commit 8ffb0a1cfe
5 changed files with 44 additions and 11 deletions
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18
Terrain2/Algorithms.swift
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@ -15,8 +15,10 @@ enum KernelError: Error {
}
protocol Algorithm {
static var name: String { get }
var name: String { get }
var outTexture: MTLTexture { get }
func encode(in encoder: MTLComputeCommandEncoder)
}
class Kernel {
@ -33,10 +35,10 @@ class Kernel {
let textures: [MTLTexture]
var outTexture: MTLTexture {
return textures[indexes.out]
return textures[textureIndexes.out]
}
private(set) var indexes: (`in`: Int, out: Int) = (in: 0, out: 1)
private(set) var textureIndexes: (`in`: Int, out: Int) = (in: 0, out: 1)
init(device: MTLDevice, library: MTLLibrary, functionName: String) throws {
guard let computeFunction = library.makeFunction(name: functionName) else {
@ -56,17 +58,17 @@ class Kernel {
self.textures = textures
}
func encode(in encoder: MTLComputeCommandEncoder, inTexture: MTLTexture?, outTexture: MTLTexture?) {
func encode(in encoder: MTLComputeCommandEncoder) {
encoder.setComputePipelineState(pipeline)
encoder.setTexture(inTexture, index: GeneratorTextureIndex.in.rawValue)
encoder.setTexture(inTexture, index: GeneratorTextureIndex.out.rawValue)
encoder.setTexture(textures[textureIndexes.in], index: textureIndexes.in)
encoder.setTexture(textures[textureIndexes.out], index: textureIndexes.out)
encoder.dispatchThreads(Kernel.textureSize, threadsPerThreadgroup: MTLSize(width: 8, height: 8, depth: 1))
}
}
/// "Compute" zero for every value of the height map.
class ZeroAlgorithm: Kernel, Algorithm {
static let name = "Zero"
let name = "Zero"
init?(device: MTLDevice, library: MTLLibrary) {
do {
@ -80,7 +82,7 @@ class ZeroAlgorithm: Kernel, Algorithm {
/// Randomly generate heights that are independent of all others.
class RandomAlgorithm: Kernel, Algorithm {
static let name = "Random"
let name = "Random"
init?(device: MTLDevice, library: MTLLibrary) {
do {