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utils.js
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function target_data(x)
{
var mapProjection = map.getProjection();
var Coords1 = [],
Coords2 = [],
Coords3 = [];
for (i = 0; i < TargetPoly.length; i = i + 2)
{
var LatLngObject = new google.maps.LatLng(TargetPoly[i], TargetPoly[i + 1]);
Coords1.push(LatLngObject);
var XYObject = map.getProjection().fromLatLngToPoint(LatLngObject);
XYObject.z = 0;
Coords2.push(XYObject);
Coords3[i] = XYObject.x;
Coords3[i + 1] = XYObject.y;
}
if (x == 1) return Coords1;
else if (x == 2) return Coords2;
else if (x == 3) return Coords3;
}
function hole_data(x, hole_number)
{
var mapProjection = map.getProjection();
var Coords1 = [],
Coords2 = [];
for (i = 0; i < HolePoly[hole_number].length; i = i + 2)
{
var LatLngObject = new google.maps.LatLng(HolePoly[hole_number][i], HolePoly[hole_number][i + 1]);
Coords1.push(LatLngObject);
var XYObject = map.getProjection().fromLatLngToPoint(LatLngObject);
XYObject.z = 1;
Coords2.push(XYObject);
}
if (x == 1) return Coords1;
else return Coords2;
}
function convert_obeject_data(data)//This function extracts lat lng from drawn objects
{
var Coords1 = [];
console.log("Google coords"+data);
for (i = 0,j=0; i < data.length; i++)
{
for (var key in data[i]) {
if (data[i].hasOwnProperty(key)) {
Coords1[j++]=data[i][key];
}
}
}
return Coords1;
}
function isPointInHoles(pt)
{
var i=0,c=HolePoly.length;
for(i=0;i<c;i++)
{
if(isPointInPoly(pt,HoleData[i]))
return true;
}
}
function distance(x1,x2)
{
return (Math.sqrt(Math.pow(x1.y - x2.y, 2) + Math.pow(x1.x - x2.x, 2)));
}
var HoleData=[];
function loadHoledata(){
var i=0,c=HolePoly.length;
for(i=0;i<c;i++)
{
HoleData[i]=hole_data(2, i);
}
console.log("loadingggg");
}
function minMaxXY(coords)//Coords should be in Coords.x and Coords.Y format
{
var c1=0,lMinX=lMaxX=coords[0].x,lMinY=lMaxY=coords[0].y;
var arr=[lMinX,lMinY,lMaxX,lMaxY];
console.log("hell"+arr);
for(c1=1;c1<coords.length;c1++)
{
if(coords[c1].x>lMaxX)
lMaxX=coords[c1].x;
if(coords[c1].x<lMinX)
lMinX=coords[c1].x;
if(coords[c1].y>lMaxY)
lMaxY=coords[c1].y;
if(coords[c1].x<lMinY)
lMinY=coords[c1].y;
}
arr=[lMinX,lMinY,lMaxX,lMaxY];
console.log("hell"+arr);
return arr;
}
var ccc=0;
function textureMap(coords)//Generates texture coordinates
{
var c1=0,d1=0,x,y;
var width=MaxX-MinX;
var height=MaxY-MinY;
var TexData = new Float32Array(coords.lenght);
for(c1=0,d1=0;c1<coords.length;c1=c1+3,d1=d1+2)
{
/*x=(coords[c1]%1);
y=([c1+1])%1;
*/
x=(MaxX-coords[c1])/width;
y=(MaxY-coords[c1+1])/height;
if(x<0 || x>1 || y<0 || y>1)
;//console.log("False");
//console.log(coords[c1+1]);
if(ccc==10)
//console.log(2.3 % 1);
TexData[d1]=x/1000000;
TexData[d1+1]=y/10000;
}
ccc++;
return TexData;
}
/*
funtion isPointInPoly Adapted from: [http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html]
*/
function isPointInPoly(pt, poly)
{
for (var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)((poly[i].y <= pt.y && pt.y < poly[j].y) || (poly[j].y <= pt.y && pt.y < poly[i].y)) && (pt.x < (poly[j].x - poly[i].x) * (pt.y - poly[i].y) / (poly[j].y - poly[i].y) + poly[i].x) && (c = !c);
return c;
}
function computePolygonCentroid(vertices, vertexCount)
{
var centroid = [0, 0];
var signedArea = 0.0;
var x0 = 0.0;
// Current vertex X
var y0 = 0.0;
// Current vertex Y
var x1 = 0.0;
// Next vertex X
var y1 = 0.0;
// Next vertex Y
var a = 0.0;
// Partial signed area
// For all vertices except last
var i = 0;
for (i = 0; i < vertexCount - 1; ++i)
{
x0 = vertices[i].x;
y0 = vertices[i].y;
x1 = vertices[i + 1].x;
y1 = vertices[i + 1].y;
a = x0 * y1 - x1 * y0;
signedArea += a;
centroid[0] += (x0 + x1) * a;
centroid[1] += (y0 + y1) * a;
}
// Do last vertex
x0 = vertices[i].x;
y0 = vertices[i].y;
x1 = vertices[0].x;
y1 = vertices[0].y;
a = x0 * y1 - x1 * y0;
signedArea += a;
centroid[0] += (x0 + x1) * a;
centroid[1] += (y0 + y1) * a;
signedArea *= 0.5;
centroid[0] /= (6.0 * signedArea);
centroid[1] /= (6.0 * signedArea);
return centroid;
}
function Coords(x, y) //function to create coordinate object
{
this.x = x;
this.y = y;
this.z = 0;
}
function holeCoords(x, y) //function to create coordinate object
{
this.x = x;
this.y = y;
this.z = 1;
}
function isPolyClockwise(vert)
{
var i=0,sum=0,len=vert.length;
for(i=2;i<len;i=i+2)
{
sum=sum+(vert[i]-vert[i-2])*(vert[i+1]+vert[i-1]);
}
if(sum>=0)
return true;
else
return false;
}
//Polygon area using Shoelace formula
function polygonArea(vertices) {
var area = 0;
for (var i = 0; i < vertices.length; i=i+2) {
j = (i + 2) % vertices.length;
area += vertices[i] * vertices[j+1];
area -= vertices[j]* vertices[i+1];
}
return area / 2;
}
function reverseCoords(vert)
{
var i=0,sum=0,len=vert.length,newArr=[];
for(i=0,j=len-1;i<len;i=i+2,j=j-2)
{
newArr[i]=vert[j-1];
newArr[i+1]=vert[j];
}
return newArr;
}
function resize()
{
var width = canvasLayer.canvas.width;
var height = canvasLayer.canvas.height;
gl.viewport(0, 0, width, height);
// matrix which maps pixel coordinates to WebGL coordinates
pixelsToWebGLMatrix.set([2 / width, 0, 0, 0, 0, -2 / height, 0, 0, 0, 0, 0, 0, -1, 1, 0, 1]);
}
function scaleMatrix(matrix, scaleX, scaleY)
{
// scaling x and y, which is just scaling first two columns of matrix
matrix[0] *= scaleX;
matrix[1] *= scaleX;
matrix[2] *= scaleX;
matrix[3] *= scaleX;
matrix[4] *= scaleY;
matrix[5] *= scaleY;
matrix[6] *= scaleY;
matrix[7] *= scaleY;
}
function translateMatrix(matrix, tx, ty)
{
// translation is in last column of matrix
matrix[12] += matrix[0] * tx + matrix[4] * ty;
matrix[13] += matrix[1] * tx + matrix[5] * ty;
matrix[14] += matrix[2] * tx + matrix[6] * ty;
matrix[15] += matrix[3] * tx + matrix[7] * ty;
}
function combineArray(arr1, arr2)
{
var c = new Float32Array(arr1.length + arr2.length);
for (i = 0; i < arr1.length; i++)
{
c[i] = arr1[i];
}
for (i = arr1.length, j = 0; j < arr2.length; i++, j++)
{
c[i] = arr2[j];
}
return c;
}