ecmascript:

function initialize()
{
	dataValid = true;
	checkDataValidity();
	if (!dataValid)
		return;

	tracePrint('positionArray.length = ' + positionArray.length);

	coordIndex = 0;
	colorIndex = 0;
	for (i = 0; i < positionArray.length; i++)
	{
		//determine the color for every position
		determineFaceColor(positionArray[i].y)
		bathyFaceColorArray[colorIndex++] = color;

		//determine the 'leftPoint' for every poistion -- For the first
		//position, use the first and second position.
		if (i == 0)
		{
			determineLeftPoint(positionArray[0], positionArray[1]);
			bathyFaceCoordPoints[coordIndex++] = leftPoint;
			determineRightPoint(positionArray[0], positionArray[1]);
			bathyFaceCoordPoints[coordIndex++] = rightPoint;
		}
		else
		{
			determineLeftPoint(positionArray[i], positionArray[i-1]);
			bathyFaceCoordPoints[coordIndex++] = leftPoint;
			determineRightPoint(positionArray[i], positionArray[i-1]);
			bathyFaceCoordPoints[coordIndex++] = rightPoint;
		}
	}

	tracePrint('bathyFaceCoordPoints = ' + bathyFaceCoordPoints);

	j = 0;
	for (i = 0; i < (positionArray.length - 1); i++)
	{
		bathyCoordIndex[j++] = i * 2;
		bathyCoordIndex[j++] = i * 2 + 1;
		bathyCoordIndex[j++] = i * 2 + 2;
		bathyCoordIndex[j++] = i * 2 + 3;
		bathyCoordIndex[j++] = -1;

		bathyCoordIndex[j++] = i * 2 + 3;
		bathyCoordIndex[j++] = i * 2 + 2;
		bathyCoordIndex[j++] = i * 2 + 1;
		bathyCoordIndex[j++] = i * 2;
		bathyCoordIndex[j++] = -1;
	}

	tracePrint('bathyCoordIndex = ' + bathyCoordIndex);
}

function checkDataValidity()
{
	if (depthRangeArray.length != depthColorArray.length)
	{
		alwaysPrint('<Error> colorSchemeDepthRangeArray must be the same length as colorSchemeColorArray');
		dataValid = false;
		return;
	}
}

function determineFaceColor(depth)
{
	for (j = 0; j < depthColorArray.length; j++)
        {
		if (depth <= depthRangeArray[j].x && depth >= depthRangeArray[j].y)
		{
			color = depthColorArray[j]
			return;
		}
        }
	color = null;
	return;
}

function determineLeftPoint(currPosition, prevPosition)
{
	deltaX = currPosition.x - prevPosition.x;
	deltaZ = currPosition.z - prevPosition.z;

	theta = Math.atan2(deltaX, deltaZ);
	tracePrint('theta = ' + theta);

	leftPoint = new SFVec3f(currPosition.x + Math.cos(theta),
	                        currPosition.y,
	                        currPosition.z - Math.sin(theta) * (beamWidth / 2));
}

function determineRightPoint(currPosition, prevPosition)
{
	deltaX = currPosition.x - prevPosition.x;
	deltaZ = currPosition.z - prevPosition.z;

	theta = Math.atan2(deltaX, deltaZ);

	rightPoint = new SFVec3f(currPosition.x - Math.cos(theta),
	                         currPosition.y,
	                         currPosition.z + Math.sin(theta) * (beamWidth / 2));
}

function alwaysPrint(string)
{
	Browser.println ('[BathymetryGeneratorPrototype] ' + string);
}

function tracePrint(string)
{
	if (traceEnabled)
		Browser.println ('[BathymetryGeneratorPrototype] ' + string);
}