patriciogonzalezvivo

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

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);

patriciogonzalezvivo

Install Homebrew

ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"

Add PATH to ~/.bash_profile and ~/.zshrc

export PATH=/usr/local/bin:$PATH

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Trigonometry

const float PI = 3.1415926535897932384626433832795;
const float PI_2 = 1.57079632679489661923;
const float PI_4 = 0.785398163397448309616;

float PHI = (1.0+sqrtf(5.0))/2.0;

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import re
from os.path import join, abspath, dirname, basename

def load_source( folder: str, filename: str, dependencies = []):
    path = abspath( join(folder, filename) )
    
    if path in dependencies:
        return ""
    else:
        dependencies.append( path )

patriciogonzalezvivo

VisualSFM by Changchang Wu

Probably the most straight forward way to start generating Point Clouds from a set of pictures.

VisualSFM is a GUI application for 3D reconstruction using structure from motion (SFM). The reconstruction system integrates several of my previous projects: SIFT on GPU(SiftGPU), Multicore Bundle Adjustment, and Towards Linear-time Incremental Structure from Motion. VisualSFM runs fast by exploiting multicore parallelism for feature detection, feature matching, and bundle adjustment.

For dense reconstruction, this program supports Yasutaka Furukawa's PMVS/CMVS tool chain, and can prepare data for Michal Jancosek's CMP-MVS. In addition, the output of VisualSFM is natively supported by Mathias Rothermel and Konrad Wenzel's [SURE]

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From http://gamedevelopment.tutsplus.com/articles/use-tri-planar-texture-mapping-for-better-terrain--gamedev-13821

Vertex Shader

varying vec4 vPos;
varying vec3 vNormal;

void main(){

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// Great example of the use of Lygia samplers functions https://github.com/patriciogonzalezvivo/lygia/tree/main/sample
// and GlslViewer https://github.com/patriciogonzalezvivo/glslViewer
// on the Looking Glass Display 

#ifdef GL_ES
precision mediump float;
#endif

uniform sampler2D   u_buffer0;
uniform sampler2D   u_buffer1;

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Extracted from https://github.com/rpavlik/maya2osg/tree/master/src/GLSL

Vertex Shader

varying vec2 vTexCoord;
varying vec3 vNormal;
varying vec3 vEye;

void main() {

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#!/bin/bash

SHADER=$1
SEC=$1

COUNTER=0
for i in `seq -w 0.01 .031 $SEC`; do
	echo $i
    `glslViewer $SHADER -s $i -o frame-$COUNTER.png`
    let COUNTER=COUNTER+1 

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RGB - YUB

mat3 yuv2rgb = mat3(1.0, 0.0, 1.28033, 1.0, -0.21482, -0.38059, 1.0, 2.12798, 0.0);
mat3 rgb2yuv = mat3(0.2126, 0.7152, 0.0722, -0.09991, -0.33609, 0.43600, 0.615, -0.5586, -0.05639);

RGB - HSV