119 lines
4.5 KiB
Swift
119 lines
4.5 KiB
Swift
//
|
|
// MetalView.swift
|
|
// chapter05
|
|
//
|
|
// Created by Marius on 2/3/16.
|
|
// Copyright © 2016 Marius Horga. All rights reserved.
|
|
//
|
|
|
|
import MetalKit
|
|
|
|
class MetalView: MTKView {
|
|
|
|
var commandQueue: MTLCommandQueue?
|
|
var rps: MTLRenderPipelineState?
|
|
var vertexBuffer: MTLBuffer!
|
|
var uniformBuffer: MTLBuffer!
|
|
|
|
required init(coder: NSCoder) {
|
|
super.init(coder: coder)
|
|
createBuffers()
|
|
registerShaders()
|
|
}
|
|
|
|
struct Vertex {
|
|
var position: vector_float4
|
|
var color: vector_float4
|
|
}
|
|
|
|
struct Matrix {
|
|
var m: [Float]
|
|
init() {
|
|
m = [1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
]
|
|
}
|
|
func translationMatrix(_ matrix: Matrix, _ position: float3) -> Matrix {
|
|
var matrix = matrix
|
|
matrix.m[12] = position.x
|
|
matrix.m[13] = position.y
|
|
matrix.m[14] = position.z
|
|
return matrix
|
|
}
|
|
func scalingMatrix(_ matrix: Matrix, _ scale: Float) -> Matrix {
|
|
var matrix = matrix
|
|
matrix.m[0] = scale
|
|
matrix.m[5] = scale
|
|
matrix.m[10] = scale
|
|
matrix.m[15] = 1.0
|
|
return matrix
|
|
}
|
|
func rotationMatrix(_ matrix: Matrix, _ rot: float3) -> Matrix {
|
|
var matrix = matrix
|
|
matrix.m[0] = cos(rot.y) * cos(rot.z)
|
|
matrix.m[4] = cos(rot.z) * sin(rot.x) * sin(rot.y) - cos(rot.x) * sin(rot.z)
|
|
matrix.m[8] = cos(rot.x) * cos(rot.z) * sin(rot.y) + sin(rot.x) * sin(rot.z)
|
|
matrix.m[1] = cos(rot.y) * sin(rot.z)
|
|
matrix.m[5] = cos(rot.x) * cos(rot.z) + sin(rot.x) * sin(rot.y) * sin(rot.z)
|
|
matrix.m[9] = -cos(rot.z) * sin(rot.x) + cos(rot.x) * sin(rot.y) * sin(rot.z)
|
|
matrix.m[2] = -sin(rot.y)
|
|
matrix.m[6] = cos(rot.y) * sin(rot.x)
|
|
matrix.m[10] = cos(rot.x) * cos(rot.y)
|
|
matrix.m[15] = 1.0
|
|
return matrix
|
|
}
|
|
func modelMatrix(_ matrix: Matrix) -> Matrix {
|
|
var matrix = matrix
|
|
matrix = rotationMatrix(matrix, float3(0.0, 0.0, 0.1))
|
|
matrix = scalingMatrix(matrix, 0.25)
|
|
matrix = translationMatrix(matrix, float3(0.0, 0.5, 0.0))
|
|
return matrix
|
|
}
|
|
}
|
|
|
|
func createBuffers() {
|
|
device = MTLCreateSystemDefaultDevice()!
|
|
commandQueue = device!.makeCommandQueue()
|
|
let vertex_data = [Vertex(position: [-1.0, -1.0, 0.0, 1.0], color: [1, 0, 0, 1]),
|
|
Vertex(position: [ 1.0, -1.0, 0.0, 1.0], color: [0, 1, 0, 1]),
|
|
Vertex(position: [ 0.0, 1.0, 0.0, 1.0], color: [0, 0, 1, 1])
|
|
]
|
|
vertexBuffer = device!.makeBuffer(bytes: vertex_data, length: MemoryLayout<Vertex>.size * 3, options:[])
|
|
uniformBuffer = device!.makeBuffer(length: MemoryLayout<Float>.size * 16, options: [])
|
|
let bufferPointer = uniformBuffer.contents()
|
|
memcpy(bufferPointer, Matrix().modelMatrix(Matrix()).m, MemoryLayout<Float>.size * 16)
|
|
}
|
|
|
|
func registerShaders() {
|
|
let library = device!.makeDefaultLibrary()!
|
|
let vertex_func = library.makeFunction(name: "vertex_func")
|
|
let frag_func = library.makeFunction(name: "fragment_func")
|
|
let rpld = MTLRenderPipelineDescriptor()
|
|
rpld.vertexFunction = vertex_func
|
|
rpld.fragmentFunction = frag_func
|
|
rpld.colorAttachments[0].pixelFormat = .bgra8Unorm
|
|
do {
|
|
try rps = device!.makeRenderPipelineState(descriptor: rpld)
|
|
} catch let error {
|
|
self.printView("\(error)")
|
|
}
|
|
}
|
|
|
|
override func draw(_ dirtyRect: NSRect) {
|
|
if let rpd = currentRenderPassDescriptor, let drawable = currentDrawable {
|
|
rpd.colorAttachments[0].clearColor = MTLClearColorMake(0.5, 0.5, 0.5, 1.0)
|
|
let commandBuffer = device!.makeCommandQueue()?.makeCommandBuffer()
|
|
let commandEncoder = commandBuffer?.makeRenderCommandEncoder(descriptor: rpd)
|
|
commandEncoder?.setRenderPipelineState(rps!)
|
|
commandEncoder?.setVertexBuffer(vertexBuffer, offset: 0, index: 0)
|
|
commandEncoder?.setVertexBuffer(uniformBuffer, offset: 0, index: 1)
|
|
commandEncoder?.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 3, instanceCount: 1)
|
|
commandEncoder?.endEncoding()
|
|
commandBuffer?.present(drawable)
|
|
commandBuffer?.commit()
|
|
}
|
|
}
|
|
}
|