ctreffs

extension Array where Element == String {
    @inlinable
    public func withUnsafeCStringBufferPointer<R>(_ body: (UnsafeBufferPointer<UnsafePointer<CChar>?>) throws -> R) rethrows -> R {
        func translate(_ slice: inout Self.SubSequence,
                       _ offset: inout Int,
                       _ buffer: UnsafeMutableBufferPointer<UnsafePointer<CChar>?>,
                       _ body: (UnsafeBufferPointer<UnsafePointer<CChar>?>) throws -> R) rethrows -> R {
            guard let string = slice.popFirst() else {
                return try body(UnsafeBufferPointer(buffer))

ctreffs

#include <iostream>
#include <vector>

#define GLFW_INCLUDE_VULKAN
#define VK_USE_PLATFORM_WIN32_KHR
#include <GLFW/glfw3.h>

#define GLFW_EXPOSE_NATIVE_WIN32
#include <GLFW/glfw3native.h>

ctreffs

/// In Metal buffers (MTLBuffer) require a specific alignment, this function helps with that.
/// <https://developer.apple.com/documentation/metal/mtlcomputecommandencoder/2928169-setbuffers#discussion>

public func align<I>(_ value: I, to alignment: I) -> I where I: BinaryInteger {
    assert(alignment == 0 || (alignment & (alignment-1)) == 0, "Alignment must be 0 or power of 2")
    if alignment == 0 {
        return value
    } else if (value & (alignment - 1)) == 0 {
        return value
    } else {

ctreffs

#!/bin/sh

# fail fast & fail uninizialized
set -ex

GIT=`xcrun -find git`

if [[ -n $1 && $1 == "YES" ]]; then paket=true; else paket=false; fi
if [[ -n $2 && $2 == "YES" ]]; then watch=true; else watch=false; fi
if [[ -n $3 && $3 == "YES" ]]; then appex=true; else appex=false; fi

ctreffs

#!/bin/sh

GIT=$1
if [[ -z $GIT ]]; then
	GIT=git	
fi

## Use the last annotated 'develop' tag as CFBundleShortVersionString
version=`"${GIT}" tag --merged HEAD --list 'develop/*' --sort=v:refname | tail -n 1`

ctreffs

#!/bin/sh

GIT=$1
if [[ -z $GIT ]]; then
	GIT=git	
fi

# Use the commit count before HEAD as CFBundleVersion
head_date=`"${GIT}" show -s --format=%cI`

ctreffs

#!/bin/sh

#  generate-global-app-config.sh
#  DPAG-DHL
#
#  Created by Christian Treffs on 26.01.17.
#
#  This is a script to aggregate all export constants into *.h/*.m and *.swift global configuration files.
#  It allows access to Xcode build settings that are managed via *.xcconfig files or the build settings tab.
#  A maintaned version may be found at https://gitlab.7p-group.com/snippets/6

ctreffs

/// A First-in first-out queue (FIFO).
///
/// - New elements are added to the end/tail of the queue.
/// - Dequeuing pulls elements from the front/head of the queue.
public struct Queue<Element> {
    private var tail: ContiguousArray<Element?>
    private var head: Int

    /// Creates a new, empty queue.

ctreffs

PBR Resources

• Rendering Physically-Based ModelIO Materials
• Physically Based Rendering in Filament
• Simplified PBR Shading Model for Unreal
• OpenGL - PBR (video) & OpenGL - PBR - LearnOpenGL & Source Code + Demos
• Moving Frostbite to PBR Slides SLIDES PAPER
• https://lousodrome.net/blog/light/2020/01/04/physically-based-rendering-references-at-the-end-of-2019/
• https://graphicrants.blogspot.com/2013/08/specular-brdf-reference.html

ctreffs

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);
	return mix(rand(fl), rand(fl + 1.0), fc);
}