jb 0xBAMA

GPU Optimization for GameDev

Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

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

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

	using UnityEngine;

	// From http://forum.unity3d.com/threads/68390-PID-controller
	// Thank you andeeeee
	public class PID
	{
	public float pFactor, iFactor, dFactor;

	float integral;
	float lastError;

	// ---- triangle rasterizer

	#define SUBPIXEL_SHIFT 8
	#define SUBPIXEL_SCALE (1 << SUBPIXEL_SHIFT)

	static RADINLINE S64 det2x2(S32 a, S32 b, S32 c, S32 d)
	{
	S64 r = (S64) ad - (S64) bc;
	return r >> SUBPIXEL_SHIFT;
	}

	#if 0 // self-compiling code
	gcc -std=c99 -Wall -Wextra -pedantic -Werror -g -O4 -march=native $0 -lm \|\| exit 1
	exec time ./a.out
	#endif

	// Blue Noise texture generation using the void-and-cluster algorithm
	// implemented by Martin Fiedler <[email protected]>
	// using an algorithm description written by Alan Wolfe:
	// https://blog.demofox.org/2019/06/25/generating-blue-noise-textures-with-void-and-cluster/

	// Hyperboloc functions by toneburst from
	// https://machinesdontcare.wordpress.com/2008/03/10/glsl-cosh-sinh-tanh/
	// These are missing in GLSL 1.10 and 1.20, uncomment if you need them

	/*
	/// COSH Function (Hyperbolic Cosine)
	float cosh(float val)
	{
	float tmp = exp(val);
	float cosH = (tmp + 1.0 / tmp) / 2.0;

	// To compile with gcc: (tested on Ubuntu 14.04 64bit):
	// g++ sdl2_opengl.cpp -lSDL2 -lGL
	// To compile with msvc: (tested on Windows 7 64bit)
	// cl sdl2_opengl.cpp /I C:\sdl2path\include /link C:\path\SDL2.lib C:\path\SDL2main.lib /SUBSYSTEM:CONSOLE /NODEFAULTLIB:libcmtd.lib opengl32.lib

	#include <stdio.h>
	#include <stdint.h>
	#include <assert.h>
	#include <SDL2/SDL.h>
	#include <SDL2/SDL_opengl.h>

	#define STB_IMAGE_IMPLEMENTATION
	#define STB_IMAGE_WRITE_IMPLEMENTATION
	#define STBI_ONLY_PNG
	#define STBI_ONLY_JPEG
	#define STBI_ONLY_BMP
	#define STBI_ONLY_GIF

	#include "stb_image.h"
	#include "stb_image_write.h"