terrainModeling.js

//-------------------------------------------------------------------------
function terrainFromIteration(n, minX,maxX,minY,maxY, vertexArray, faceArray,normalArray)
{
    var deltaX=(maxX-minX)/n;
    var deltaY=(maxY-minY)/n;
    for(var i=0;i<=n;i++)
       for(var j=0;j<=n;j++)
       {
           vertexArray.push(minX+deltaX*j);
           vertexArray.push(minY+deltaY*i);
           vertexArray.push(0);
           
           normalArray.push(0);
           normalArray.push(0);
           normalArray.push(1);
       }

    var numT=0;
    for(var i=0;i<n;i++)
       for(var j=0;j<n;j++)
       {
           var vid = i*(n+1) + j;
           faceArray.push(vid);
           faceArray.push(vid+1);
           faceArray.push(vid+n+1);
           
           faceArray.push(vid+1);
           faceArray.push(vid+1+n+1);
           faceArray.push(vid+n+1);
           numT+=2;
       }
    return numT;
}
//-------------------------------------------------------------------------
function generateLinesFromIndexedTriangles(faceArray,lineArray)
{
    numTris=faceArray.length/3;
    for(var f=0;f<numTris;f++)
    {
        var fid=f*3;
        lineArray.push(faceArray[fid]);
        lineArray.push(faceArray[fid+1]);
        
        lineArray.push(faceArray[fid+1]);
        lineArray.push(faceArray[fid+2]);
        
        lineArray.push(faceArray[fid+2]);
        lineArray.push(faceArray[fid]);
    }
}

//-------------------------------------------------------------------------