//*** GLOBAL VARIABLES ***
// Written by Jarek Rossignac,  June 2006 
                 
// CAMERA
pt Origin=new pt(0,0,0);
pt Eye=new pt(0,0,800);
cam C = new cam(Eye, Origin);
cam C1 = new cam(Eye, Origin);
cam C2 = new cam(Eye, Origin);
float svd=800;
//float fov=atan2(width/2,svd);
float fov=PI/3;
pt Cbox = new pt(width/2,height/2,0);                   // mini-max box center
float Rbox=1000;    

// CAMERA
pt Mouse = new pt(0,0,0);                 // current mouse position
float xr, yr = 0;                         // mouse coordinates relative to center of window
int px=0, py=0;                           // coordinats of mouse when it was last pressed

// DISPLAY
vec labelD=new vec(-10,-10, 2);           // offset vector for drawing labels
boolean showNormals=false, showVertices=false, showEdges=true, showLabels=false, showPath=false;  // flags for rendering
boolean jumps=true;
color grey = color(200, 200, 210), red = color(200, 10, 10), blue = color(10, 10, 200), lightblue = color(100, 100, 255),
      green = color(10, 200, 20), black = color(10, 10, 10), magenta = color(250, 150, 200), brown = color(150, 100, 50), 
      yellow = color(255, 238, 70); 
      
// FILES      
String [] fn= new String[4];
int fni=0;   

// VERTICES
int w=4;                                   // size of initial Tmesh-grid made in setup
int nv = w*w, maxnv = 10000;;               // current and max number of vertices
pt[] G = new pt [maxnv];                   // geometry table (vertices)
vec[] Nv = new vec [maxnv];                // vertex normals or laplace vectors
int [] valence = new int [maxnv];          // vertex valence (count of incident triangles)
int[] Mv = new int[maxnv];                    // vertex markers

// TRIANGLES
int nt = 2*(w-1)*(w-1), maxnt = maxnv*2;   // current and max number of triangles
vec[] Nt = new vec [maxnt];                // vtriangles normals
int[] Mt = new int[maxnt];                 // triangle markers for distance and other things   
int[] SMt = new int[maxnt];                // sum of triangle markers for isolation
boolean flipOrientation=false;            // if set, save will flip all triangles
int rings=1;                               // number of rings for colorcoding

// CORNERS
int nc = nt*3;                             // current number of corners (3 per triangle)
int[] V = new int [3*maxnt];               // V table (triangle/vertex indices)
int[] O = new int [3*maxnt];               // O table (opposite corner indices)
int[] W = new int [3*maxnt];               // mid-edge vertex indices for subdivision (associated with corner opposite to edge)
int c = 0;                                 // current corner shown in image and manipulated with keys: n, p, o, l, r
boolean[] P = new boolean [3*maxnt];