100 lines
3.9 KiB
Swift
100 lines
3.9 KiB
Swift
/**
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* Copyright (c) 2019 Razeware LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Notwithstanding the foregoing, you may not use, copy, modify, merge, publish,
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* distribute, sublicense, create a derivative work, and/or sell copies of the
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* Software in any work that is designed, intended, or marketed for pedagogical or
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* instructional purposes related to programming, coding, application development,
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* or information technology. Permission for such use, copying, modification,
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* merger, publication, distribution, sublicensing, creation of derivative works,
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* or sale is expressly withheld.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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import MetalKit
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public typealias float2 = SIMD2<Float>
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public typealias float3 = SIMD3<Float>
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public typealias float4 = SIMD4<Float>
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class Renderer: NSObject, MTKViewDelegate {
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static var device: MTLDevice!
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let commandQueue: MTLCommandQueue
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var particlesPipelineState: MTLComputePipelineState!
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var renderPipelineState: MTLRenderPipelineState!
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var emitters: [Emitter] = []
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init?(metalView: MTKView) {
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guard let device = MTLCreateSystemDefaultDevice(),
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let commandQueue = device.makeCommandQueue() else { return nil }
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Renderer.device = device
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self.commandQueue = commandQueue
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super.init()
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metalView.delegate = self
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metalView.framebufferOnly = false
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metalView.clearColor = MTLClearColor(red: 0.2, green: 0.2,
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blue: 0.2, alpha: 1)
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buildPipelineStates()
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}
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private func buildPipelineStates() {
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do {
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guard let library = Renderer.device.makeDefaultLibrary(),
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let function = library.makeFunction(name: "compute") else { return }
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// particle update pipeline state
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particlesPipelineState = try Renderer.device.makeComputePipelineState(function: function)
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// render pipeline state
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let vertexFunction = library.makeFunction(name: "vertex_particle")
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let fragmentFunction = library.makeFunction(name: "fragment_particle")
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let descriptor = MTLRenderPipelineDescriptor()
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descriptor.vertexFunction = vertexFunction
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descriptor.fragmentFunction = fragmentFunction
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descriptor.colorAttachments[0].pixelFormat = .bgra8Unorm
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renderPipelineState = try
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Renderer.device.makeRenderPipelineState(descriptor: descriptor)
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renderPipelineState = try Renderer.device.makeRenderPipelineState(descriptor: descriptor)
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} catch let error {
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print(error.localizedDescription)
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}
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}
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public func draw(in view: MTKView) {
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guard let commandBuffer = commandQueue.makeCommandBuffer(),
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let descriptor = view.currentRenderPassDescriptor,
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let drawable = view.currentDrawable else { return }
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// first command encoder
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// update the particle emitters
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// second command encoder
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// render the particle emitters
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commandBuffer.present(drawable)
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commandBuffer.commit()
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}
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public func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {}
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}
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