MasDennis’s gists

MasDennis / RealityKitPostProcessEncode.swift

Created September 26, 2021 18:17

	guard let computePipelineState = self.computePipelineState,
	let encoder = context.commandBuffer.makeComputeCommandEncoder()
	else {
	return
	}

	encoder.setComputePipelineState(computePipelineState)
	encoder.setTexture(context.sourceColorTexture, index: 0)
	encoder.setTexture(context.targetColorTexture, index: 1)
	encoder.dispatchThreadgroups(self.threadgroupsPerGrid, threadsPerThreadgroup: self.threadsPerThreadgroup)

MasDennis / RealityKitPostProcessSetupComputePipeline.swift

Created September 26, 2021 18:10

	private func setupComputePipeline(targetTexture: MTLTexture) {
	guard let device = MTLCreateSystemDefaultDevice(),
	let library = device.makeDefaultLibrary(),
	let postProcessingKernel = library.makeFunction(name: "inverseColorKernel"),
	let pipelineState = try? device.makeComputePipelineState(function: postProcessingKernel)
	else {
	assertionFailure()
	return
	}

MasDennis / RealityKitPostProcess.swift

Created September 26, 2021 18:05

	let device = MTLCreateSystemDefaultDevice()
	let library = device.makeDefaultLibrary()
	let postProcessingKernel = library.makeFunction(name: "inverseColorKernel")
	let pipelineState = try? device.makeComputePipelineState(function: postProcessingKernel)

MasDennis / RealityKitPostProcessShader.metal

Created September 26, 2021 17:54

	#include <metal_stdlib>
	using namespace metal;

	[[kernel]]
	void inverseColorKernel(texture2d<float, access::read> sourceTexture [[texture(0)]],
	texture2d<float, access::write> targetTexture [[texture(1)]],
	uint2 gridPosition [[thread_position_in_grid]])
	{
	float4 sourceColor = sourceTexture.read(gridPosition);
	float4 inverseColor = float4(1.0 - sourceColor.rgb, sourceColor.a);

MasDennis / RealityKitPostProcess1.swift

Created September 26, 2021 17:46

	arView.renderCallbacks.postProcess = { [weak self] context in
	// ... post-processing code ...
	}

MasDennis / LoopAndGestureViewController.swift

Created April 2, 2021 13:48

	//
	// LoopAndGestureViewController.swift
	//
	//
	// Created by Dennis Ippel on 02/04/2021.
	//

	import UIKit
	import RealityKit
	import Combine

MasDennis / QuickRealityKitTutorial.swift

Created April 2, 2021 04:56

	import UIKit
	import RealityKit
	import Combine

	class GameViewController: UIViewController {

	var sceneEventsUpdateSubscription: Cancellable!

	override func viewDidLoad() {
	super.viewDidLoad()

MasDennis / ScreenQuadFragmentShader.metal

Created October 31, 2020 13:25

	struct FragmentOut {
	float4 color [[color(0)]];
	float depth [[depth(any)]];
	};

	fragment FragmentOut screenQuadFragment(ScreenQuadVertex inVertex [[stage_in]],
	texture2d<uint, access::sample> segmentationTexture [[texture(0)]],
	constant Uniforms& uniforms [[buffer(0)]])
	{
	FragmentOut out;

MasDennis / ScreenQuadVertexShader.metal

Created October 31, 2020 13:20

	constant float4x4 quadVertices = float4x4(float4( -1.0, -1.0, 0.0, 1.0 ),
	float4( 1.0, -1.0, 0.0, 1.0 ),
	float4( -1.0, 1.0, 0.0, 1.0 ),
	float4( 1.0, 1.0, 0.0, 1.0 ));

	constant float4x2 quadTextureCoordinates = float4x2(float2( 1.0, 1.0 ),
	float2( 0.0, 1.0 ),
	float2( 1.0, 0.0 ),
	float2( 0.0, 0.0 ));

MasDennis / GetDepthBufferValue.swift

Created October 31, 2020 13:16

	let viewBoundingBox = viewSpaceBoundingBox(fromNormalizedImageBoundingBox: boundingBox,
	usingDisplayTransform: displayTransform)

	let midPoint = CGPoint(x: viewBoundingBox.midX,
	y: viewBoundingBox.midY)

	// Get the feature point that is closed to our detected rectangle's center
	let results = sceneView.hitTest(midPoint, types: .featurePoint)

	let depthBufferZ = calculateFragmentDepth(usingCamera: camera,

Dennis Ippel MasDennis