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added raytracing

This commit is contained in:
Marius Horga 2018-07-12 11:13:53 -05:00
parent 04c26636ad
commit fa63cd009e
15 changed files with 1970 additions and 0 deletions
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345
raytracing/RayTracing.xcodeproj/project.pbxproj Normal file
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//
// Renderer.swift
//
// Created by Marius Horga on 7/7/18.
//
import MetalKit
import MetalPerformanceShaders
class Renderer: NSObject {
let device: MTLDevice!
let queue: MTLCommandQueue!
var rayPipeline: MTLComputePipelineState!
var shadePipeline: MTLComputePipelineState!
var shadowPipeline: MTLComputePipelineState!
var accumulatePipeline: MTLComputePipelineState!
var copyPipeline: MTLRenderPipelineState!
let maxFramesInFlight = 3
let alignedUniformsSize = (MemoryLayout<Uniforms>.stride + 255) & ~255
let rayStride = 48 // shouldn't be hardcoded... if possible
let intersectionStride = MemoryLayout<MPSIntersectionDistancePrimitiveIndexCoordinates>.stride
var accelerationStructure: MPSTriangleAccelerationStructure!
var intersector: MPSRayIntersector!
var vertexPositionBuffer: MTLBuffer!
var vertexNormalBuffer: MTLBuffer!
var vertexColorBuffer: MTLBuffer!
var rayBuffer: MTLBuffer!
var shadowRayBuffer: MTLBuffer!
var intersectionBuffer: MTLBuffer!
var uniformBuffer: MTLBuffer!
var randomBuffer: MTLBuffer!
var triangleMaskBuffer: MTLBuffer!
var renderTarget: MTLTexture!
var accumulationTarget: MTLTexture!
var semaphore: DispatchSemaphore!
var size: CGSize!
var randomBufferOffset: Int!
var uniformBufferOffset: Int!
var uniformBufferIndex: Int = 0
var frameIndex: uint!
init?(metalKitView: MTKView) {
metalKitView.colorPixelFormat = .rgba16Float
metalKitView.sampleCount = 1
metalKitView.drawableSize = metalKitView.frame.size
guard let device = metalKitView.device else {
return nil
}
self.device = device
queue = self.device.makeCommandQueue()
super.init()
semaphore = DispatchSemaphore.init(value: maxFramesInFlight)
createPipelines(device: self.device, view: metalKitView)
createScene()
createBuffers()
createIntersector()
mtkView(metalKitView, drawableSizeWillChange: metalKitView.frame.size)
}
func createPipelines(device: MTLDevice, view: MTKView) {
guard let library = device.makeDefaultLibrary() else {
return
}
let computeDescriptor = MTLComputePipelineDescriptor()
computeDescriptor.threadGroupSizeIsMultipleOfThreadExecutionWidth = true
let vertexFunction = library.makeFunction(name: "vertexShader")
let fragmentFunction = library.makeFunction(name: "fragmentShader")
let pipelineDescriptor = MTLRenderPipelineDescriptor()
pipelineDescriptor.sampleCount = view.sampleCount
pipelineDescriptor.vertexFunction = vertexFunction
pipelineDescriptor.fragmentFunction = fragmentFunction
pipelineDescriptor.colorAttachments[0].pixelFormat = view.colorPixelFormat
do {
computeDescriptor.computeFunction = library.makeFunction(name: "rayKernel")
rayPipeline = try device.makeComputePipelineState(descriptor: computeDescriptor, options: [], reflection: nil)
computeDescriptor.computeFunction = library.makeFunction(name: "shadeKernel")
shadePipeline = try device.makeComputePipelineState(descriptor: computeDescriptor, options: [], reflection: nil)
computeDescriptor.computeFunction = library.makeFunction(name: "shadowKernel")
shadowPipeline = try device.makeComputePipelineState(descriptor: computeDescriptor, options: [], reflection: nil)
computeDescriptor.computeFunction = library.makeFunction(name: "accumulateKernel")
accumulatePipeline = try device.makeComputePipelineState(descriptor: computeDescriptor, options: [], reflection: nil)
copyPipeline = try device.makeRenderPipelineState(descriptor: pipelineDescriptor)
} catch let error {
print(error.localizedDescription)
}
}
func createScene() {
// light source
var transform = translate(tx: 0, ty: 1, tz: 0) * scale(sx: 0.5, sy: 1.98, sz: 0.5)
createCube(faceMask: .positiveY, color: float3(1), transform: transform, inwardNormals: true, triangleMask: TRIANGLE_MASK_LIGHT)
// top, bottom and back walls
transform = translate(tx: 0, ty: 1, tz: 0) * scale(sx: 2, sy: 2, sz: 2)
createCube(faceMask: [.negativeY, .positiveY, .negativeZ], color: float3(0.725, 0.71, 0.68), transform: transform, inwardNormals: true, triangleMask: TRIANGLE_MASK_GEOMETRY)
// left wall
createCube(faceMask: .negativeX, color: float3(0.63, 0.065, 0.05), transform: transform, inwardNormals: true, triangleMask: TRIANGLE_MASK_GEOMETRY)
// right wall
createCube(faceMask: .positiveX, color: float3(0.14, 0.45, 0.091), transform: transform, inwardNormals: true, triangleMask: TRIANGLE_MASK_GEOMETRY)
// short box
transform = translate(tx: 0.3275, ty: 0.3, tz: 0.3725) * rotate(radians: -0.3, axis: float3(0.0, 1.0, 0.0)) * scale(sx: 0.6, sy: 0.6, sz: 0.6)
createCube(faceMask: .all, color: float3(0.725, 0.71, 0.68), transform: transform, inwardNormals: false, triangleMask: TRIANGLE_MASK_GEOMETRY)
// tall box
transform = translate(tx: -0.335, ty: 0.6, tz: -0.29) * rotate(radians: 0.3, axis: float3(0.0, 1.0, 0.0)) * scale(sx: 0.6, sy: 1.2, sz: 0.6)
createCube(faceMask: .all, color: float3(0.725, 0.71, 0.68), transform: transform, inwardNormals: false, triangleMask: TRIANGLE_MASK_GEOMETRY)
}
func createBuffers() {
let uniformBufferSize = alignedUniformsSize * maxFramesInFlight
uniformBuffer = device.makeBuffer(length: uniformBufferSize, options: .storageModeManaged)
randomBuffer = device.makeBuffer(length: 256 * MemoryLayout<float2>.stride * maxFramesInFlight, options: .storageModeManaged)
vertexPositionBuffer = device.makeBuffer(bytes: &vertices, length: vertices.count * MemoryLayout<float3>.stride, options: .storageModeManaged)
vertexColorBuffer = device.makeBuffer(bytes: &colors, length: colors.count * MemoryLayout<float3>.stride, options: .storageModeManaged)
vertexNormalBuffer = device.makeBuffer(bytes: &normals, length: normals.count * MemoryLayout<float3>.stride, options: .storageModeManaged)
triangleMaskBuffer = device.makeBuffer(bytes: &masks, length: masks.count * MemoryLayout<uint>.stride, options: .storageModeManaged)
vertexPositionBuffer?.didModifyRange(0..<(vertexPositionBuffer?.length)!)
vertexColorBuffer?.didModifyRange(0..<(vertexColorBuffer?.length)!)
vertexNormalBuffer?.didModifyRange(0..<(vertexNormalBuffer?.length)!)
triangleMaskBuffer?.didModifyRange(0..<(triangleMaskBuffer?.length)!)
}
func createIntersector() {
intersector = MPSRayIntersector(device: device)
intersector?.rayDataType = .originMaskDirectionMaxDistance
intersector?.rayStride = rayStride
intersector?.rayMaskOptions = .primitive
accelerationStructure = MPSTriangleAccelerationStructure(device: device)
accelerationStructure?.vertexBuffer = vertexPositionBuffer
accelerationStructure?.maskBuffer = triangleMaskBuffer
accelerationStructure?.triangleCount = vertices.count / 3
accelerationStructure?.rebuild()
}
func updateUniforms() {
uniformBufferOffset = alignedUniformsSize * uniformBufferIndex
let pointer = uniformBuffer!.contents().advanced(by: uniformBufferOffset)
let uniforms = pointer.bindMemory(to: Uniforms.self, capacity: 1)
uniforms.pointee.camera.position = float3(0.0, 1.0, 3.38)
uniforms.pointee.camera.forward = float3(0.0, 0.0, -1.0)
uniforms.pointee.camera.right = float3(1.0, 0.0, 0.0)
uniforms.pointee.camera.up = float3(0.0, 1.0, 0.0)
uniforms.pointee.light.position = float3(0.0, 1.98, 0.0)
uniforms.pointee.light.forward = float3(0.0, -1.0, 0.0)
uniforms.pointee.light.right = float3(0.25, 0.0, 0.0)
uniforms.pointee.light.up = float3(0.0, 0.0, 0.25)
uniforms.pointee.light.color = float3(4.0, 4.0, 4.0)
let fieldOfView = 45.0 * (Float.pi / 180.0)
let aspectRatio = Float(size.width) / Float(size.height)
let imagePlaneHeight = tanf(fieldOfView / 2.0)
let imagePlaneWidth = aspectRatio * imagePlaneHeight
uniforms.pointee.camera.right *= imagePlaneWidth
uniforms.pointee.camera.up *= imagePlaneHeight
uniforms.pointee.width = uint(size.width)
uniforms.pointee.height = uint(size.height)
uniforms.pointee.blocksWide = (uniforms.pointee.width + 15) / 16
uniforms.pointee.frameIndex = frameIndex
frameIndex += 1
uniformBuffer?.didModifyRange(uniformBufferOffset..<(uniformBufferOffset + alignedUniformsSize))
randomBufferOffset = 256 * MemoryLayout<float2>.stride * uniformBufferIndex
let p = randomBuffer!.contents().advanced(by: randomBufferOffset)
var random = p.bindMemory(to: float2.self, capacity: 1)
for _ in 0..<256 {
random.pointee = float2(Float(drand48()), Float(drand48()) )
random = random.advanced(by: 1)
}
randomBuffer?.didModifyRange(randomBufferOffset..<(randomBufferOffset + 256 * MemoryLayout<float2>.stride))
uniformBufferIndex = (uniformBufferIndex + 1) % maxFramesInFlight
}
}
extension Renderer: MTKViewDelegate {
func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
self.size = size
let rayCount = Int(size.width * size.height)
rayBuffer = device.makeBuffer(length: rayStride * rayCount, options: .storageModePrivate)
shadowRayBuffer = device.makeBuffer(length: rayStride * rayCount, options: .storageModePrivate)
intersectionBuffer = device.makeBuffer(length: intersectionStride * rayCount, options: .storageModePrivate)
let renderTargetDescriptor = MTLTextureDescriptor()
renderTargetDescriptor.pixelFormat = .rgba32Float
renderTargetDescriptor.textureType = .type2D
renderTargetDescriptor.width = Int(size.width)
renderTargetDescriptor.height = Int(size.height)
renderTargetDescriptor.storageMode = .private
renderTargetDescriptor.usage = [.shaderRead, .shaderWrite]
renderTarget = device.makeTexture(descriptor: renderTargetDescriptor)
accumulationTarget = device.makeTexture(descriptor: renderTargetDescriptor)
frameIndex = 0
}
func draw(in view: MTKView) {
semaphore.wait()
guard let commandBuffer = queue.makeCommandBuffer() else {
return
}
commandBuffer.addCompletedHandler { cb in
self.semaphore.signal()
}
updateUniforms()
let width = Int(size.width)
let height = Int(size.height)
let threadsPerThreadgroup = MTLSizeMake(8, 8, 1)
let threadgroups = MTLSizeMake(
(width + threadsPerThreadgroup.width - 1) / threadsPerThreadgroup.width,
(height + threadsPerThreadgroup.height - 1) / threadsPerThreadgroup.height,
1)
// 1st compute pipeline - Primary Rays
var computeEncoder = commandBuffer.makeComputeCommandEncoder()
computeEncoder?.setBuffer(uniformBuffer, offset: uniformBufferOffset, index: 0)
computeEncoder?.setBuffer(rayBuffer, offset: 0, index: 1)
computeEncoder?.setBuffer(randomBuffer, offset: randomBufferOffset, index: 2)
computeEncoder?.setTexture(renderTarget, index: 0)
computeEncoder?.setComputePipelineState(rayPipeline!)
computeEncoder?.dispatchThreadgroups(threadgroups, threadsPerThreadgroup: threadsPerThreadgroup)
computeEncoder?.endEncoding()
// 2nd and 3rd compute pipelines
for _ in 0..<3 {
// Shade pipeline
intersector?.intersectionDataType = .distancePrimitiveIndexCoordinates
intersector?.encodeIntersection(commandBuffer: commandBuffer,
intersectionType: .nearest,
rayBuffer: rayBuffer!,
rayBufferOffset: 0,
intersectionBuffer: intersectionBuffer!,
intersectionBufferOffset: 0,
rayCount: width * height,
accelerationStructure: accelerationStructure!)
computeEncoder = commandBuffer.makeComputeCommandEncoder()
computeEncoder?.setBuffer(uniformBuffer, offset: uniformBufferOffset, index: 0)
computeEncoder?.setBuffer(rayBuffer, offset: 0, index: 1)
computeEncoder?.setBuffer(shadowRayBuffer, offset: 0, index: 2)
computeEncoder?.setBuffer(intersectionBuffer, offset: 0, index: 3)
computeEncoder?.setBuffer(vertexColorBuffer, offset: 0, index: 4)
computeEncoder?.setBuffer(vertexNormalBuffer, offset: 0, index: 5)
computeEncoder?.setBuffer(randomBuffer, offset: randomBufferOffset, index: 6)
computeEncoder?.setBuffer(triangleMaskBuffer, offset: 0, index: 7)
computeEncoder?.setTexture(renderTarget, index: 0)
computeEncoder?.setComputePipelineState(shadePipeline!)
computeEncoder?.dispatchThreadgroups(threadgroups, threadsPerThreadgroup: threadsPerThreadgroup)
computeEncoder?.endEncoding()
// Shadows pipeline
intersector?.intersectionDataType = .distance
intersector?.encodeIntersection(commandBuffer: commandBuffer,
intersectionType: .any,
rayBuffer: shadowRayBuffer!,
rayBufferOffset: 0,
intersectionBuffer: intersectionBuffer!,
intersectionBufferOffset: 0,
rayCount: width * height,
accelerationStructure: accelerationStructure!)
computeEncoder = commandBuffer.makeComputeCommandEncoder()
computeEncoder?.setBuffer(uniformBuffer, offset: uniformBufferOffset, index: 0)
computeEncoder?.setBuffer(shadowRayBuffer, offset: 0, index: 1)
computeEncoder?.setBuffer(intersectionBuffer, offset: 0, index: 2)
computeEncoder?.setTexture(renderTarget, index: 0)
computeEncoder?.setComputePipelineState(shadowPipeline!)
computeEncoder?.dispatchThreadgroups(threadgroups, threadsPerThreadgroup: threadsPerThreadgroup)
computeEncoder?.endEncoding()
}
// 4th compute pipeline
computeEncoder = commandBuffer.makeComputeCommandEncoder()
computeEncoder?.setBuffer(uniformBuffer, offset: uniformBufferOffset, index: 0)
computeEncoder?.setTexture(renderTarget, index: 0)
computeEncoder?.setTexture(accumulationTarget, index: 1)
computeEncoder?.setComputePipelineState(accumulatePipeline!)
computeEncoder?.dispatchThreadgroups(threadgroups, threadsPerThreadgroup: threadsPerThreadgroup)
computeEncoder?.endEncoding()
guard let descriptor = view.currentRenderPassDescriptor,
let renderEncoder = commandBuffer.makeRenderCommandEncoder(
descriptor: descriptor) else {
return
}
renderEncoder.setRenderPipelineState(copyPipeline!)
renderEncoder.setFragmentTexture(accumulationTarget, index: 0)
renderEncoder.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 6)
renderEncoder.endEncoding()
guard let drawable = view.currentDrawable else {
return
}
commandBuffer.present(drawable)
commandBuffer.commit()
}
}

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//
// Scene.swift
//
// Created by Marius Horga on 7/7/18.
//
import simd
var vertices = [float3]()
var normals = [float3]()
var colors = [float3]()
var masks = [uint]()
struct Faces: OptionSet {
let rawValue: Int
static let positiveX = Faces(rawValue: 1)
static let negativeX = Faces(rawValue: 2)
static let positiveY = Faces(rawValue: 4)
static let negativeY = Faces(rawValue: 8)
static let positiveZ = Faces(rawValue: 16)
static let negativeZ = Faces(rawValue: 32)
static let all = Faces(rawValue: 64)
}
func getTriangleNormal(v0: float3, v1: float3, v2: float3) -> float3 {
let e1 = normalize(v1 - v0)
let e2 = normalize(v2 - v0)
return cross(e1, e2)
}
func createCubeFace(cubeVertices: [float3],
color: float3,
i0: Int,
i1: Int,
i2: Int,
i3: Int,
inwardNormals: Bool,
triangleMask: uint)
{
let v0 = cubeVertices[i0]
let v1 = cubeVertices[i1]
let v2 = cubeVertices[i2]
let v3 = cubeVertices[i3]
var n0 = getTriangleNormal(v0: v0, v1: v1, v2: v2)
var n1 = getTriangleNormal(v0: v0, v1: v2, v2: v3)
if (inwardNormals) {
n0 = -n0
n1 = -n1
}
vertices += [v0, v1, v2, v0, v2, v3]
normals += [n0, n0, n0, n1, n1, n1]
colors += [color, color, color, color, color, color]
masks += [triangleMask, triangleMask]
}
func createCube(faceMask: Faces,
color: float3,
transform: float4x4,
inwardNormals: Bool,
triangleMask: Int32)
{
var cubeVertices = [
float3(-0.5, -0.5, -0.5),
float3( 0.5, -0.5, -0.5),
float3(-0.5, 0.5, -0.5),
float3( 0.5, 0.5, -0.5),
float3(-0.5, -0.5, 0.5),
float3( 0.5, -0.5, 0.5),
float3(-0.5, 0.5, 0.5),
float3( 0.5, 0.5, 0.5)
]
for i in 0...7 {
let vertex = cubeVertices[i]
var transformedVertex = float4(vertex.x, vertex.y, vertex.z, 1.0)
transformedVertex = transform * transformedVertex
cubeVertices[i] = float3(transformedVertex.x, transformedVertex.y, transformedVertex.z)
}
if faceMask.contains(.negativeX) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 0, i1: 4, i2: 6, i3: 2, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
if faceMask.contains(.positiveX) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 1, i1: 3, i2: 7, i3: 5, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
if faceMask.contains(.negativeY) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 0, i1: 1, i2: 5, i3: 4, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
if faceMask.contains(.positiveY) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 2, i1: 6, i2: 7, i3: 3, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
if faceMask.contains(.negativeZ) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 0, i1: 2, i2: 3, i3: 1, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
if faceMask.contains(.positiveZ) || faceMask.contains(.all) {
createCubeFace(cubeVertices: cubeVertices, color: color, i0: 4, i1: 5, i2: 7, i3: 6, inwardNormals: inwardNormals, triangleMask: uint(triangleMask))
}
}

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//
// ShaderTypes.h
//
// Created by Marius Horga on 7/7/18.
//
#ifndef ShaderTypes_h
#define ShaderTypes_h
#include <simd/simd.h>
#define TRIANGLE_MASK_GEOMETRY 1
#define TRIANGLE_MASK_LIGHT 2
#define RAY_MASK_PRIMARY 3
#define RAY_MASK_SHADOW 1
#define RAY_MASK_SECONDARY 1
struct Camera {
vector_float3 position;
vector_float3 right;
vector_float3 up;
vector_float3 forward;
};
struct AreaLight {
vector_float3 position;
vector_float3 forward;
vector_float3 right;
vector_float3 up;
vector_float3 color;
};
struct Uniforms
{
unsigned int width;
unsigned int height;
unsigned int blocksWide;
unsigned int frameIndex;
struct Camera camera;
struct AreaLight light;
};
#endif /* ShaderTypes_h */

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//
// Shaders.metal
//
// Created by Marius Horga on 7/7/18.
//
#include <metal_stdlib>
#include <simd/simd.h>
#import "ShaderTypes.h"
using namespace metal;
struct Ray {
packed_float3 origin;
uint mask;
packed_float3 direction;
float maxDistance;
float3 color;
};
struct Intersection {
float distance;
int primitiveIndex;
float2 coordinates;
};
kernel void rayKernel(uint2 tid [[thread_position_in_grid]],
constant Uniforms & uniforms [[buffer(0)]],
device Ray *rays [[buffer(1)]],
device float2 *random [[buffer(2)]],
texture2d<float, access::write> dstTex [[texture(0)]])
{
if (tid.x < uniforms.width && tid.y < uniforms.height) {
unsigned int rayIdx = tid.y * uniforms.width + tid.x;
device Ray & ray = rays[rayIdx];
float2 pixel = (float2)tid;
float2 r = random[(tid.y % 16) * 16 + (tid.x % 16)];
pixel += r;
float2 uv = (float2)pixel / float2(uniforms.width, uniforms.height);
uv = uv * 2.0f - 1.0f;
constant Camera & camera = uniforms.camera;
ray.origin = camera.position;
ray.direction = normalize(uv.x * camera.right +
uv.y * camera.up +
camera.forward);
ray.mask = RAY_MASK_PRIMARY;
ray.maxDistance = INFINITY;
ray.color = float3(1.0f, 1.0f, 1.0f);
dstTex.write(float4(0.0f, 0.0f, 0.0f, 0.0f), tid);
}
}
template<typename T>
inline T interpolateVertexAttribute(device T *attributes, Intersection intersection) {
float3 uvw;
uvw.xy = intersection.coordinates;
uvw.z = 1.0f - uvw.x - uvw.y;
unsigned int triangleIndex = intersection.primitiveIndex;
T T0 = attributes[triangleIndex * 3 + 0];
T T1 = attributes[triangleIndex * 3 + 1];
T T2 = attributes[triangleIndex * 3 + 2];
return uvw.x * T0 + uvw.y * T1 + uvw.z * T2;
}
inline void sampleAreaLight(constant AreaLight & light,
float2 u,
float3 position,
thread float3 & lightDirection,
thread float3 & lightColor,
thread float & lightDistance)
{
u = u * 2.0f - 1.0f;
float3 samplePosition = light.position +
light.right * u.x +
light.up * u.y;
lightDirection = samplePosition - position;
lightDistance = length(lightDirection);
float inverseLightDistance = 1.0f / max(lightDistance, 1e-3f);
lightDirection *= inverseLightDistance;
lightColor = light.color;
lightColor *= (inverseLightDistance * inverseLightDistance);
lightColor *= saturate(dot(-lightDirection, light.forward));
}
inline float3 sampleCosineWeightedHemisphere(float2 u) {
float phi = 2.0f * M_PI_F * u.x;
float cos_phi;
float sin_phi = sincos(phi, cos_phi);
float cos_theta = sqrt(u.y);
float sin_theta = sqrt(1.0f - cos_theta * cos_theta);
return float3(sin_theta * cos_phi, cos_theta, sin_theta * sin_phi);
}
inline float3 alignHemisphereWithNormal(float3 sample, float3 normal) {
float3 up = normal;
float3 right = normalize(cross(normal, float3(0.0072f, 1.0f, 0.0034f)));
float3 forward = cross(right, up);
return sample.x * right + sample.y * up + sample.z * forward;
}
kernel void shadeKernel(uint2 tid [[thread_position_in_grid]],
constant Uniforms & uniforms,
device Ray *rays,
device Ray *shadowRays,
device Intersection *intersections,
device float3 *vertexColors,
device float3 *vertexNormals,
device float2 *random,
device uint *triangleMasks,
texture2d<float, access::write> dstTex)
{
if (tid.x < uniforms.width && tid.y < uniforms.height) {
unsigned int rayIdx = tid.y * uniforms.width + tid.x;
device Ray & ray = rays[rayIdx];
device Ray & shadowRay = shadowRays[rayIdx];
device Intersection & intersection = intersections[rayIdx];
float3 color = ray.color;
if (ray.maxDistance >= 0.0f && intersection.distance >= 0.0f) {
uint mask = triangleMasks[intersection.primitiveIndex];
if (mask == TRIANGLE_MASK_GEOMETRY) {
float3 intersectionPoint = ray.origin + ray.direction * intersection.distance;
float3 surfaceNormal = interpolateVertexAttribute(vertexNormals, intersection);
surfaceNormal = normalize(surfaceNormal);
float2 r = random[(tid.y % 16) * 16 + (tid.x % 16)];
float3 lightDirection;
float3 lightColor;
float lightDistance;
sampleAreaLight(uniforms.light, r, intersectionPoint, lightDirection,
lightColor, lightDistance);
lightColor *= saturate(dot(surfaceNormal, lightDirection));
color *= interpolateVertexAttribute(vertexColors, intersection);
shadowRay.origin = intersectionPoint + surfaceNormal * 1e-3f;
shadowRay.direction = lightDirection;
shadowRay.mask = RAY_MASK_SHADOW;
shadowRay.maxDistance = lightDistance - 1e-3f;
shadowRay.color = lightColor * color;
float3 sampleDirection = sampleCosineWeightedHemisphere(r);
sampleDirection = alignHemisphereWithNormal(sampleDirection, surfaceNormal);
ray.origin = intersectionPoint + surfaceNormal * 1e-3f;
ray.direction = sampleDirection;
ray.color = color;
ray.mask = RAY_MASK_SECONDARY;
}
else {
dstTex.write(float4(uniforms.light.color, 1.0f), tid);
ray.maxDistance = -1.0f;
shadowRay.maxDistance = -1.0f;
}
}
else {
ray.maxDistance = -1.0f;
shadowRay.maxDistance = -1.0f;
}
}
}
kernel void shadowKernel(uint2 tid [[thread_position_in_grid]],
constant Uniforms & uniforms,
device Ray *shadowRays,
device float *intersections,
texture2d<float, access::read_write> dstTex)
{
if (tid.x < uniforms.width && tid.y < uniforms.height) {
unsigned int rayIdx = tid.y * uniforms.width + tid.x;
device Ray & shadowRay = shadowRays[rayIdx];
float intersectionDistance = intersections[rayIdx];
if (shadowRay.maxDistance >= 0.0f && intersectionDistance < 0.0f) {
float3 color = shadowRay.color;
color += dstTex.read(tid).xyz;
dstTex.write(float4(color, 1.0f), tid);
}
}
}
kernel void accumulateKernel(uint2 tid [[thread_position_in_grid]],
constant Uniforms & uniforms,
texture2d<float> renderTex,
texture2d<float, access::read_write> accumTex)
{
if (tid.x < uniforms.width && tid.y < uniforms.height) {
float3 color = renderTex.read(tid).xyz;
if (uniforms.frameIndex > 0) {
float3 prevColor = accumTex.read(tid).xyz;
prevColor *= uniforms.frameIndex;
color += prevColor;
color /= (uniforms.frameIndex + 1);
}
accumTex.write(float4(color, 1.0f), tid);
}
}
struct Vertex {
float4 position [[position]];
float2 uv;
};
constant float2 quadVertices[] = {
float2(-1, -1),
float2(-1, 1),
float2( 1, 1),
float2(-1, -1),
float2( 1, 1),
float2( 1, -1)
};
vertex Vertex vertexShader(unsigned short vid [[vertex_id]])
{
float2 position = quadVertices[vid];
Vertex out;
out.position = float4(position, 0, 1);
out.uv = position * 0.5f + 0.5f;
return out;
}
fragment float4 fragmentShader(Vertex in [[stage_in]],
texture2d<float> tex)
{
constexpr sampler s(min_filter::nearest, mag_filter::nearest, mip_filter::none);
float3 color = tex.sample(s, in.uv).xyz;
color = color / (1.0f + color);
return float4(color, 1.0f);
}

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//
// AppDelegate.swift
//
// Created by Marius Horga on 7/7/18.
//
import Cocoa
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
return true
}
}

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raytracing/Supporting files/Base.lproj/Main.storyboard Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14295.6" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14295.6"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--Application-->
<scene sceneID="JPo-4y-FX3">
<objects>
<application id="hnw-xV-0zn" sceneMemberID="viewController">
<menu key="mainMenu" title="Main Menu" systemMenu="main" id="AYu-sK-qS6">
<items>
<menuItem title="RayTracing macOS" id="1Xt-HY-uBw">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="RayTracing macOS" systemMenu="apple" id="uQy-DD-JDr">
<items>
<menuItem title="About RayTracing macOS" id="5kV-Vb-QxS">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="orderFrontStandardAboutPanel:" target="Ady-hI-5gd" id="Exp-CZ-Vem"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="VOq-y0-SEH"/>
<menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW"/>
<menuItem isSeparatorItem="YES" id="wFC-TO-SCJ"/>
<menuItem title="Services" id="NMo-om-nkz">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Services" systemMenu="services" id="hz9-B4-Xy5"/>
</menuItem>
<menuItem isSeparatorItem="YES" id="4je-JR-u6R"/>
<menuItem title="Hide RayTracing macOS" keyEquivalent="h" id="Olw-nP-bQN">
<connections>
<action selector="hide:" target="Ady-hI-5gd" id="PnN-Uc-m68"/>
</connections>
</menuItem>
<menuItem title="Hide Others" keyEquivalent="h" id="Vdr-fp-XzO">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="hideOtherApplications:" target="Ady-hI-5gd" id="VT4-aY-XCT"/>
</connections>
</menuItem>
<menuItem title="Show All" id="Kd2-mp-pUS">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="unhideAllApplications:" target="Ady-hI-5gd" id="Dhg-Le-xox"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="kCx-OE-vgT"/>
<menuItem title="Quit RayTracing macOS" keyEquivalent="q" id="4sb-4s-VLi">
<connections>
<action selector="terminate:" target="Ady-hI-5gd" id="Te7-pn-YzF"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="File" id="dMs-cI-mzQ">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="File" id="bib-Uj-vzu">
<items>
<menuItem title="New" keyEquivalent="n" id="Was-JA-tGl">
<connections>
<action selector="newDocument:" target="Ady-hI-5gd" id="4Si-XN-c54"/>
</connections>
</menuItem>
<menuItem title="Open…" keyEquivalent="o" id="IAo-SY-fd9">
<connections>
<action selector="openDocument:" target="Ady-hI-5gd" id="bVn-NM-KNZ"/>
</connections>
</menuItem>
<menuItem title="Open Recent" id="tXI-mr-wws">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Open Recent" systemMenu="recentDocuments" id="oas-Oc-fiZ">
<items>
<menuItem title="Clear Menu" id="vNY-rz-j42">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="clearRecentDocuments:" target="Ady-hI-5gd" id="Daa-9d-B3U"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem isSeparatorItem="YES" id="m54-Is-iLE"/>
<menuItem title="Close" keyEquivalent="w" id="DVo-aG-piG">
<connections>
<action selector="performClose:" target="Ady-hI-5gd" id="HmO-Ls-i7Q"/>
</connections>
</menuItem>
<menuItem title="Save…" keyEquivalent="s" id="pxx-59-PXV">
<connections>
<action selector="saveDocument:" target="Ady-hI-5gd" id="teZ-XB-qJY"/>
</connections>
</menuItem>
<menuItem title="Save As…" keyEquivalent="S" id="Bw7-FT-i3A">
<connections>
<action selector="saveDocumentAs:" target="Ady-hI-5gd" id="mDf-zr-I0C"/>
</connections>
</menuItem>
<menuItem title="Revert to Saved" keyEquivalent="r" id="KaW-ft-85H">
<connections>
<action selector="revertDocumentToSaved:" target="Ady-hI-5gd" id="iJ3-Pv-kwq"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="aJh-i4-bef"/>
<menuItem title="Page Setup…" keyEquivalent="P" id="qIS-W8-SiK">
<modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
<connections>
<action selector="runPageLayout:" target="Ady-hI-5gd" id="Din-rz-gC5"/>
</connections>
</menuItem>
<menuItem title="Print…" keyEquivalent="p" id="aTl-1u-JFS">
<connections>
<action selector="print:" target="Ady-hI-5gd" id="qaZ-4w-aoO"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Edit" id="5QF-Oa-p0T">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Edit" id="W48-6f-4Dl">
<items>
<menuItem title="Undo" keyEquivalent="z" id="dRJ-4n-Yzg">
<connections>
<action selector="undo:" target="Ady-hI-5gd" id="M6e-cu-g7V"/>
</connections>
</menuItem>
<menuItem title="Redo" keyEquivalent="Z" id="6dh-zS-Vam">
<connections>
<action selector="redo:" target="Ady-hI-5gd" id="oIA-Rs-6OD"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="WRV-NI-Exz"/>
<menuItem title="Cut" keyEquivalent="x" id="uRl-iY-unG">
<connections>
<action selector="cut:" target="Ady-hI-5gd" id="YJe-68-I9s"/>
</connections>
</menuItem>
<menuItem title="Copy" keyEquivalent="c" id="x3v-GG-iWU">
<connections>
<action selector="copy:" target="Ady-hI-5gd" id="G1f-GL-Joy"/>
</connections>
</menuItem>
<menuItem title="Paste" keyEquivalent="v" id="gVA-U4-sdL">
<connections>
<action selector="paste:" target="Ady-hI-5gd" id="UvS-8e-Qdg"/>
</connections>
</menuItem>
<menuItem title="Paste and Match Style" keyEquivalent="V" id="WeT-3V-zwk">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="pasteAsPlainText:" target="Ady-hI-5gd" id="cEh-KX-wJQ"/>
</connections>
</menuItem>
<menuItem title="Delete" id="pa3-QI-u2k">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="delete:" target="Ady-hI-5gd" id="0Mk-Ml-PaM"/>
</connections>
</menuItem>
<menuItem title="Select All" keyEquivalent="a" id="Ruw-6m-B2m">
<connections>
<action selector="selectAll:" target="Ady-hI-5gd" id="VNm-Mi-diN"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="uyl-h8-XO2"/>
<menuItem title="Find" id="4EN-yA-p0u">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Find" id="1b7-l0-nxx">
<items>
<menuItem title="Find…" tag="1" keyEquivalent="f" id="Xz5-n4-O0W">
<connections>
<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="cD7-Qs-BN4"/>
</connections>
</menuItem>
<menuItem title="Find and Replace…" tag="12" keyEquivalent="f" id="YEy-JH-Tfz">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="WD3-Gg-5AJ"/>
</connections>
</menuItem>
<menuItem title="Find Next" tag="2" keyEquivalent="g" id="q09-fT-Sye">
<connections>
<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="NDo-RZ-v9R"/>
</connections>
</menuItem>
<menuItem title="Find Previous" tag="3" keyEquivalent="G" id="OwM-mh-QMV">
<connections>
<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="HOh-sY-3ay"/>
</connections>
</menuItem>
<menuItem title="Use Selection for Find" tag="7" keyEquivalent="e" id="buJ-ug-pKt">
<connections>
<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="U76-nv-p5D"/>
</connections>
</menuItem>
<menuItem title="Jump to Selection" keyEquivalent="j" id="S0p-oC-mLd">
<connections>
<action selector="centerSelectionInVisibleArea:" target="Ady-hI-5gd" id="IOG-6D-g5B"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Spelling and Grammar" id="Dv1-io-Yv7">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Spelling" id="3IN-sU-3Bg">
<items>
<menuItem title="Show Spelling and Grammar" keyEquivalent=":" id="HFo-cy-zxI">
<connections>
<action selector="showGuessPanel:" target="Ady-hI-5gd" id="vFj-Ks-hy3"/>
</connections>
</menuItem>
<menuItem title="Check Document Now" keyEquivalent=";" id="hz2-CU-CR7">
<connections>
<action selector="checkSpelling:" target="Ady-hI-5gd" id="fz7-VC-reM"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="bNw-od-mp5"/>
<menuItem title="Check Spelling While Typing" id="rbD-Rh-wIN">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleContinuousSpellChecking:" target="Ady-hI-5gd" id="7w6-Qz-0kB"/>
</connections>
</menuItem>
<menuItem title="Check Grammar With Spelling" id="mK6-2p-4JG">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleGrammarChecking:" target="Ady-hI-5gd" id="muD-Qn-j4w"/>
</connections>
</menuItem>
<menuItem title="Correct Spelling Automatically" id="78Y-hA-62v">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticSpellingCorrection:" target="Ady-hI-5gd" id="2lM-Qi-WAP"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Substitutions" id="9ic-FL-obx">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Substitutions" id="FeM-D8-WVr">
<items>
<menuItem title="Show Substitutions" id="z6F-FW-3nz">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="orderFrontSubstitutionsPanel:" target="Ady-hI-5gd" id="oku-mr-iSq"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="gPx-C9-uUO"/>
<menuItem title="Smart Copy/Paste" id="9yt-4B-nSM">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleSmartInsertDelete:" target="Ady-hI-5gd" id="3IJ-Se-DZD"/>
</connections>
</menuItem>
<menuItem title="Smart Quotes" id="hQb-2v-fYv">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticQuoteSubstitution:" target="Ady-hI-5gd" id="ptq-xd-QOA"/>
</connections>
</menuItem>
<menuItem title="Smart Dashes" id="rgM-f4-ycn">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticDashSubstitution:" target="Ady-hI-5gd" id="oCt-pO-9gS"/>
</connections>
</menuItem>
<menuItem title="Smart Links" id="cwL-P1-jid">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticLinkDetection:" target="Ady-hI-5gd" id="Gip-E3-Fov"/>
</connections>
</menuItem>
<menuItem title="Data Detectors" id="tRr-pd-1PS">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticDataDetection:" target="Ady-hI-5gd" id="R1I-Nq-Kbl"/>
</connections>
</menuItem>
<menuItem title="Text Replacement" id="HFQ-gK-NFA">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleAutomaticTextReplacement:" target="Ady-hI-5gd" id="DvP-Fe-Py6"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Transformations" id="2oI-Rn-ZJC">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Transformations" id="c8a-y6-VQd">
<items>
<menuItem title="Make Upper Case" id="vmV-6d-7jI">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="uppercaseWord:" target="Ady-hI-5gd" id="sPh-Tk-edu"/>
</connections>
</menuItem>
<menuItem title="Make Lower Case" id="d9M-CD-aMd">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="lowercaseWord:" target="Ady-hI-5gd" id="iUZ-b5-hil"/>
</connections>
</menuItem>
<menuItem title="Capitalize" id="UEZ-Bs-lqG">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="capitalizeWord:" target="Ady-hI-5gd" id="26H-TL-nsh"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Speech" id="xrE-MZ-jX0">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Speech" id="3rS-ZA-NoH">
<items>
<menuItem title="Start Speaking" id="Ynk-f8-cLZ">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="startSpeaking:" target="Ady-hI-5gd" id="654-Ng-kyl"/>
</connections>
</menuItem>
<menuItem title="Stop Speaking" id="Oyz-dy-DGm">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="stopSpeaking:" target="Ady-hI-5gd" id="dX8-6p-jy9"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Format" id="jxT-CU-nIS">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Format" id="GEO-Iw-cKr">
<items>
<menuItem title="Font" id="Gi5-1S-RQB">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Font" systemMenu="font" id="aXa-aM-Jaq">
<items>
<menuItem title="Show Fonts" keyEquivalent="t" id="Q5e-8K-NDq">
<connections>
<action selector="orderFrontFontPanel:" target="YLy-65-1bz" id="WHr-nq-2xA"/>
</connections>
</menuItem>
<menuItem title="Bold" tag="2" keyEquivalent="b" id="GB9-OM-e27">
<connections>
<action selector="addFontTrait:" target="YLy-65-1bz" id="hqk-hr-sYV"/>
</connections>
</menuItem>
<menuItem title="Italic" tag="1" keyEquivalent="i" id="Vjx-xi-njq">
<connections>
<action selector="addFontTrait:" target="YLy-65-1bz" id="IHV-OB-c03"/>
</connections>
</menuItem>
<menuItem title="Underline" keyEquivalent="u" id="WRG-CD-K1S">
<connections>
<action selector="underline:" target="Ady-hI-5gd" id="FYS-2b-JAY"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="5gT-KC-WSO"/>
<menuItem title="Bigger" tag="3" keyEquivalent="+" id="Ptp-SP-VEL">
<connections>
<action selector="modifyFont:" target="YLy-65-1bz" id="Uc7-di-UnL"/>
</connections>
</menuItem>
<menuItem title="Smaller" tag="4" keyEquivalent="-" id="i1d-Er-qST">
<connections>
<action selector="modifyFont:" target="YLy-65-1bz" id="HcX-Lf-eNd"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="kx3-Dk-x3B"/>
<menuItem title="Kern" id="jBQ-r6-VK2">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Kern" id="tlD-Oa-oAM">
<items>
<menuItem title="Use Default" id="GUa-eO-cwY">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="useStandardKerning:" target="Ady-hI-5gd" id="6dk-9l-Ckg"/>
</connections>
</menuItem>
<menuItem title="Use None" id="cDB-IK-hbR">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="turnOffKerning:" target="Ady-hI-5gd" id="U8a-gz-Maa"/>
</connections>
</menuItem>
<menuItem title="Tighten" id="46P-cB-AYj">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="tightenKerning:" target="Ady-hI-5gd" id="hr7-Nz-8ro"/>
</connections>
</menuItem>
<menuItem title="Loosen" id="ogc-rX-tC1">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="loosenKerning:" target="Ady-hI-5gd" id="8i4-f9-FKE"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Ligatures" id="o6e-r0-MWq">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Ligatures" id="w0m-vy-SC9">
<items>
<menuItem title="Use Default" id="agt-UL-0e3">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="useStandardLigatures:" target="Ady-hI-5gd" id="7uR-wd-Dx6"/>
</connections>
</menuItem>
<menuItem title="Use None" id="J7y-lM-qPV">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="turnOffLigatures:" target="Ady-hI-5gd" id="iX2-gA-Ilz"/>
</connections>
</menuItem>
<menuItem title="Use All" id="xQD-1f-W4t">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="useAllLigatures:" target="Ady-hI-5gd" id="KcB-kA-TuK"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Baseline" id="OaQ-X3-Vso">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Baseline" id="ijk-EB-dga">
<items>
<menuItem title="Use Default" id="3Om-Ey-2VK">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="unscript:" target="Ady-hI-5gd" id="0vZ-95-Ywn"/>
</connections>
</menuItem>
<menuItem title="Superscript" id="Rqc-34-cIF">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="superscript:" target="Ady-hI-5gd" id="3qV-fo-wpU"/>
</connections>
</menuItem>
<menuItem title="Subscript" id="I0S-gh-46l">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="subscript:" target="Ady-hI-5gd" id="Q6W-4W-IGz"/>
</connections>
</menuItem>
<menuItem title="Raise" id="2h7-ER-AoG">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="raiseBaseline:" target="Ady-hI-5gd" id="4sk-31-7Q9"/>
</connections>
</menuItem>
<menuItem title="Lower" id="1tx-W0-xDw">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="lowerBaseline:" target="Ady-hI-5gd" id="OF1-bc-KW4"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem isSeparatorItem="YES" id="Ndw-q3-faq"/>
<menuItem title="Show Colors" keyEquivalent="C" id="bgn-CT-cEk">
<connections>
<action selector="orderFrontColorPanel:" target="Ady-hI-5gd" id="mSX-Xz-DV3"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="iMs-zA-UFJ"/>
<menuItem title="Copy Style" keyEquivalent="c" id="5Vv-lz-BsD">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="copyFont:" target="Ady-hI-5gd" id="GJO-xA-L4q"/>
</connections>
</menuItem>
<menuItem title="Paste Style" keyEquivalent="v" id="vKC-jM-MkH">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="pasteFont:" target="Ady-hI-5gd" id="JfD-CL-leO"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Text" id="Fal-I4-PZk">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Text" id="d9c-me-L2H">
<items>
<menuItem title="Align Left" keyEquivalent="{" id="ZM1-6Q-yy1">
<connections>
<action selector="alignLeft:" target="Ady-hI-5gd" id="zUv-R1-uAa"/>
</connections>
</menuItem>
<menuItem title="Center" keyEquivalent="|" id="VIY-Ag-zcb">
<connections>
<action selector="alignCenter:" target="Ady-hI-5gd" id="spX-mk-kcS"/>
</connections>
</menuItem>
<menuItem title="Justify" id="J5U-5w-g23">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="alignJustified:" target="Ady-hI-5gd" id="ljL-7U-jND"/>
</connections>
</menuItem>
<menuItem title="Align Right" keyEquivalent="}" id="wb2-vD-lq4">
<connections>
<action selector="alignRight:" target="Ady-hI-5gd" id="r48-bG-YeY"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="4s2-GY-VfK"/>
<menuItem title="Writing Direction" id="H1b-Si-o9J">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Writing Direction" id="8mr-sm-Yjd">
<items>
<menuItem title="Paragraph" enabled="NO" id="ZvO-Gk-QUH">
<modifierMask key="keyEquivalentModifierMask"/>
</menuItem>
<menuItem id="YGs-j5-SAR">
<string key="title"> Default</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeBaseWritingDirectionNatural:" target="Ady-hI-5gd" id="qtV-5e-UBP"/>
</connections>
</menuItem>
<menuItem id="Lbh-J2-qVU">
<string key="title"> Left to Right</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeBaseWritingDirectionLeftToRight:" target="Ady-hI-5gd" id="S0X-9S-QSf"/>
</connections>
</menuItem>
<menuItem id="jFq-tB-4Kx">
<string key="title"> Right to Left</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeBaseWritingDirectionRightToLeft:" target="Ady-hI-5gd" id="5fk-qB-AqJ"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="swp-gr-a21"/>
<menuItem title="Selection" enabled="NO" id="cqv-fj-IhA">
<modifierMask key="keyEquivalentModifierMask"/>
</menuItem>
<menuItem id="Nop-cj-93Q">
<string key="title"> Default</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeTextWritingDirectionNatural:" target="Ady-hI-5gd" id="lPI-Se-ZHp"/>
</connections>
</menuItem>
<menuItem id="BgM-ve-c93">
<string key="title"> Left to Right</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeTextWritingDirectionLeftToRight:" target="Ady-hI-5gd" id="caW-Bv-w94"/>
</connections>
</menuItem>
<menuItem id="RB4-Sm-HuC">
<string key="title"> Right to Left</string>
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="makeTextWritingDirectionRightToLeft:" target="Ady-hI-5gd" id="EXD-6r-ZUu"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem isSeparatorItem="YES" id="fKy-g9-1gm"/>
<menuItem title="Show Ruler" id="vLm-3I-IUL">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="toggleRuler:" target="Ady-hI-5gd" id="FOx-HJ-KwY"/>
</connections>
</menuItem>
<menuItem title="Copy Ruler" keyEquivalent="c" id="MkV-Pr-PK5">
<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
<connections>
<action selector="copyRuler:" target="Ady-hI-5gd" id="71i-fW-3W2"/>
</connections>
</menuItem>
<menuItem title="Paste Ruler" keyEquivalent="v" id="LVM-kO-fVI">
<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
<connections>
<action selector="pasteRuler:" target="Ady-hI-5gd" id="cSh-wd-qM2"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="View" id="H8h-7b-M4v">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="View" id="HyV-fh-RgO">
<items>
<menuItem title="Show Toolbar" keyEquivalent="t" id="snW-S8-Cw5">
<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
<connections>
<action selector="toggleToolbarShown:" target="Ady-hI-5gd" id="BXY-wc-z0C"/>
</connections>
</menuItem>
<menuItem title="Customize Toolbar…" id="1UK-8n-QPP">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="runToolbarCustomizationPalette:" target="Ady-hI-5gd" id="pQI-g3-MTW"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="hB3-LF-h0Y"/>
<menuItem title="Show Sidebar" keyEquivalent="s" id="kIP-vf-haE">
<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
<connections>
<action selector="toggleSourceList:" target="Ady-hI-5gd" id="iwa-gc-5KM"/>
</connections>
</menuItem>
<menuItem title="Enter Full Screen" keyEquivalent="f" id="4J7-dP-txa">
<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES"/>
<connections>
<action selector="toggleFullScreen:" target="Ady-hI-5gd" id="dU3-MA-1Rq"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Window" id="aUF-d1-5bR">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Window" systemMenu="window" id="Td7-aD-5lo">
<items>
<menuItem title="Minimize" keyEquivalent="m" id="OY7-WF-poV">
<connections>
<action selector="performMiniaturize:" target="Ady-hI-5gd" id="VwT-WD-YPe"/>
</connections>
</menuItem>
<menuItem title="Zoom" id="R4o-n2-Eq4">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="performZoom:" target="Ady-hI-5gd" id="DIl-cC-cCs"/>
</connections>
</menuItem>
<menuItem isSeparatorItem="YES" id="eu3-7i-yIM"/>
<menuItem title="Bring All to Front" id="LE2-aR-0XJ">
<modifierMask key="keyEquivalentModifierMask"/>
<connections>
<action selector="arrangeInFront:" target="Ady-hI-5gd" id="DRN-fu-gQh"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
<menuItem title="Help" id="wpr-3q-Mcd">
<modifierMask key="keyEquivalentModifierMask"/>
<menu key="submenu" title="Help" systemMenu="help" id="F2S-fz-NVQ">
<items>
<menuItem title="RayTracing macOS Help" keyEquivalent="?" id="FKE-Sm-Kum">
<connections>
<action selector="showHelp:" target="Ady-hI-5gd" id="y7X-2Q-9no"/>
</connections>
</menuItem>
</items>
</menu>
</menuItem>
</items>
</menu>
<connections>
<outlet property="delegate" destination="Voe-Tx-rLC" id="PrD-fu-P6m"/>
</connections>
</application>
<customObject id="Voe-Tx-rLC" customClass="AppDelegate" customModule="RayTracing" customModuleProvider="target"/>
<customObject id="YLy-65-1bz" customClass="NSFontManager"/>
<customObject id="Ady-hI-5gd" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="75" y="0.0"/>
</scene>
<!--Window Controller-->
<scene sceneID="R2V-B0-nI4">
<objects>
<windowController id="B8D-0N-5wS" sceneMemberID="viewController">
<window key="window" title="RayTracing macOS" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" id="IQv-IB-iLA">
<windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
<windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
<rect key="contentRect" x="196" y="240" width="480" height="270"/>
<rect key="screenRect" x="0.0" y="0.0" width="1680" height="1027"/>
<connections>
<outlet property="delegate" destination="B8D-0N-5wS" id="vtl-GN-dlf"/>
</connections>
</window>
<connections>
<segue destination="XfG-lQ-9wD" kind="relationship" relationship="window.shadowedContentViewController" id="cq2-FE-JQM"/>
</connections>
</windowController>
<customObject id="Oky-zY-oP4" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="75" y="250"/>
</scene>
<!--View Controller-->
<scene sceneID="hIz-AP-VOD">
<objects>
<viewController id="XfG-lQ-9wD" customClass="ViewController" customModule="RayTracing" customModuleProvider="target" sceneMemberID="viewController">
<view key="view" wantsLayer="YES" id="m2S-Jp-Qdl" customClass="MTKView">
<rect key="frame" x="0.0" y="0.0" width="800" height="600"/>
<autoresizingMask key="autoresizingMask"/>
</view>
</viewController>
<customObject id="rPt-NT-nkU" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="75" y="817"/>
</scene>
</scenes>
</document>

30
raytracing/Supporting files/Info.plist Normal file
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@ -0,0 +1,30 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>$(DEVELOPMENT_LANGUAGE)</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIconFile</key>
<string></string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
<key>LSMinimumSystemVersion</key>
<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
<key>NSMainStoryboardFile</key>
<string>Main</string>
<key>NSPrincipalClass</key>
<string>NSApplication</string>
</dict>
</plist>

23
raytracing/Supporting files/ViewController.swift Normal file
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//
// ViewController.swift
//
// Created by Marius Horga on 7/7/18.
//
import MetalKit
class ViewController: NSViewController {
var renderer: Renderer!
var mtkView: MTKView!
override func viewDidLoad() {
super.viewDidLoad()
guard let mtkView = self.view as? MTKView,
let defaultDevice = MTLCreateSystemDefaultDevice() else { fatalError() }
mtkView.device = defaultDevice
renderer = Renderer(metalKitView: mtkView)
renderer.mtkView(mtkView, drawableSizeWillChange: mtkView.drawableSize)
mtkView.delegate = renderer
}
}

40
raytracing/Transforms.swift Normal file
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//
// Transforms.swift
//
// Created by Marius Horga on 7/7/18.
//
import simd
func translate(tx: Float, ty: Float, tz: Float) -> float4x4 {
return float4x4(
float4( 1, 0, 0, 0),
float4( 0, 1, 0, 0),
float4( 0, 0, 1, 0),
float4(tx, ty, tz, 1)
)
}
func rotate(radians: Float, axis: float3) -> float4x4 {
let normalizedAxis = normalize(axis)
let ct = cosf(radians)
let st = sinf(radians)
let ci = 1 - ct
let x = normalizedAxis.x, y = normalizedAxis.y, z = normalizedAxis.z
return float4x4(
float4( ct + x * x * ci, y * x * ci + z * st, z * x * ci - y * st, 0),
float4(x * y * ci - z * st, ct + y * y * ci, z * y * ci + x * st, 0),
float4(x * z * ci + y * st, y * z * ci - x * st, ct + z * z * ci, 0),
float4( 0, 0, 0, 1)
)
}
func scale(sx: Float, sy: Float, sz: Float) -> float4x4 {
return float4x4(
float4(sx, 0, 0, 0),
float4( 0, sy, 0, 0),
float4( 0, 0, sz, 0),
float4( 0, 0, 0, 1)
)
}