Thibault Hennequin thennequin

From time to time I receive questions on the depth aware upsampling mentioned in the INSIDE-rendering presentation: https://loopit.dk/rendering_inside.pdf#page=39

The goal of this technique is to take the texture-output from a half-resolution pass, containing the results of sampling volumetric fog - and scale it up to full resolution. This presents two challenges:

Making sure samples from the low-resolution buffer, do not spill on top of foreground objects in the high-resolution buffer
Making sure the samples in the volumetric fog can be properly accumulated by TAA after upsampling

	// Octahedral mapping visualization in Odin and Raylib
	// by Jakub Tomšů (@jakubtomsu_)
	//
	// Build and run with 'odin run octsphere.odin -file'.
	// No additional dependencies required.
	//
	// Sources:
	// https://gpuopen.com/learn/fetching-from-cubes-and-octahedrons/
	// https://knarkowicz.wordpress.com/2014/04/16/octahedron-normal-vector-encoding/

	/*
	MIT License

	Copyright (c) 2023 Jiayin Cao

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is

	// Copyright (c) 2023 Tomasz Stachowiak
	//
	// This contribution is dual licensed under EITHER OF
	//
	// Apache License, Version 2.0, (http://www.apache.org/licenses/LICENSE-2.0)
	// MIT license (http://opensource.org/licenses/MIT)
	//
	// at your option.

	#include "/inc/frame_constants.hlsl"

	template<typename T>
	void bitonic_sort64(T vals_[64])
	{
	int h=-1;
	do
	{
	for(unsigned i=0; i<32; ++i)
	{
	unsigned idx0=2*i;
	unsigned idx1=4(i&h)-2(i+h)-1;

	//-----------------------------------------------------------------------------------------------
	// SquirrelNoise5.hpp
	//
	#pragma once


	/////////////////////////////////////////////////////////////////////////////////////////////////
	// SquirrelNoise5 - Squirrel's Raw Noise utilities (version 5)
	//
	// This code is made available under the Creative Commons attribution 3.0 license (CC-BY-3.0 US):

	// Copyright (c) 2021 Advanced Micro Devices, Inc. All rights reserved.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy
	// of this software and associated documentation files (the "Software"), to deal
	// in the Software without restriction, including without limitation the rights
	// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	// copies of the Software, and to permit persons to whom the Software is
	// furnished to do so, subject to the following conditions:
	//
	// The above copyright notice and this permission notice shall be included in

	Windows Registry Editor Version 5.00

	[HKEY_CLASSES_ROOT\Directory\shell\smerge]
	; %PROGRAMFILES%\Sublime Merge\sublime_merge.exe
	"Icon"=hex(2):25,00,50,00,52,00,4f,00,47,00,52,00,41,00,4d,00,46,00,49,00,4c,\
	00,45,00,53,00,25,00,5c,00,53,00,75,00,62,00,6c,00,69,00,6d,00,65,00,20,00,\
	4d,00,65,00,72,00,67,00,65,00,5c,00,73,00,75,00,62,00,6c,00,69,00,6d,00,65,\
	00,5f,00,6d,00,65,00,72,00,67,00,65,00,2e,00,65,00,78,00,65,00,00,00
	@="Open with Sublime Merge"

	// cl /I celt /I silk /I silk/float /I include /c opus.c
	// lib opus.obj

	#define OPUS_CPU_X64
	#define USE_ALLOCA
	#define OPUS_BUILD

	#include "celt/bands.c"
	#include "celt/celt.c"
	#include "celt/celt_encoder.c"


	struct OBB
	{
	vec3 center = {};
	vec3 extents = {};
	// Orthonormal basis
	union
	{
	vec3 axes[3] = {};
	};