cjcliffe/heightfield_test.html

## heightfield_test.html
<html>
<head>
    <script src="ammo.js" type='text/javascript'></script>
    <script type='text/javascript'>

        var upIndex = 1;
        var maxHeight = 100;
        var flipQuadEdges=true;

        var points = [0,  1,  2,  3,
                      4,  5,  6,  7,
                      8,  9,  10, 11,
                      12, 13, 14, 15];

        var xdiv = 4,
            zdiv = 4; // 4x4 heightfield

        var scalarType = {
            FLOAT: 0,
            DOUBLE: 1,
            INTEGER: 2,
            SHORT: 3,
            FIXEDPOINT88: 4,
            UCHAR: 5
        };


/* Floats */
        var ptr = Ammo.allocate(points.length, "float", Ammo.ALLOC_NORMAL);

        for (var f = 0, fMax = xdiv*zdiv; f < fMax; f++) {
//            Ammo.HEAPF32[(ptr>>2)+f] = points[f];   // also works in place of next line
            Ammo.setValue(ptr+(f<<2), points[f], 'float');
            // Data in/out confirmed working:
            console.log("Input Position["+(f<10?" ":"")+f+"]: "+Ammo.getValue(ptr+(f<<2), 'float'));
        }

        btShape = new Ammo.btHeightfieldTerrainShape(xdiv, zdiv, ptr, 1, -maxHeight, maxHeight, upIndex, scalarType.FLOAT, flipQuadEdges);

/*  */


/* Doubles * /

        var heapf64 = new Float64Array(Ammo.HEAPF32.buffer);
        var ptr = Ammo.allocate(points.length, "double", Ammo.ALLOC_NORMAL);

        for (f = 0, fMax = xdiv*zdiv; f < fMax; f++) {
//            heapf64[(ptr>>3)+f] = points[f];
            Ammo.setValue(ptr+(f<<3), points[f], 'double');
            console.log("Input Position["+(f<10?" ":"")+f+"]: "+Ammo.getValue(ptr+(f<<3), 'double'));
        }

        btShape = new Ammo.btHeightfieldTerrainShape(xdiv, zdiv, ptr, 1, -maxHeight, maxHeight, upIndex, scalarType.DOUBLE, flipQuadEdges);
/*  */

        console.log("-----------------");

        for (var i = 0; i < zdiv; i++) {
            for (var j = 0; j < xdiv; j++) {
                var idx = (i*xdiv+j);
                console.log("Read position ["+(idx<10?" ":"")+idx+"] = "+btShape.getRawHeightFieldValue(j,i));
            }
        }

    </script>
</head>
<body>
    <br/>Check the console...<br/>
</body>
</html>
	<html>
	<head>
	<script src="ammo.js" type='text/javascript'></script>
	<script type='text/javascript'>

	var upIndex = 1;
	var maxHeight = 100;
	var flipQuadEdges=true;

	var points = [0, 1, 2, 3,
	4, 5, 6, 7,
	8, 9, 10, 11,
	12, 13, 14, 15];

	var xdiv = 4,
	zdiv = 4; // 4x4 heightfield

	var scalarType = {
	FLOAT: 0,
	DOUBLE: 1,
	INTEGER: 2,
	SHORT: 3,
	FIXEDPOINT88: 4,
	UCHAR: 5
	};


	/* Floats */
	var ptr = Ammo.allocate(points.length, "float", Ammo.ALLOC_NORMAL);

	for (var f = 0, fMax = xdiv*zdiv; f < fMax; f++) {
	// Ammo.HEAPF32[(ptr>>2)+f] = points[f]; // also works in place of next line
	Ammo.setValue(ptr+(f<<2), points[f], 'float');
	// Data in/out confirmed working:
	console.log("Input Position["+(f<10?" ":"")+f+"]: "+Ammo.getValue(ptr+(f<<2), 'float'));
	}

	btShape = new Ammo.btHeightfieldTerrainShape(xdiv, zdiv, ptr, 1, -maxHeight, maxHeight, upIndex, scalarType.FLOAT, flipQuadEdges);

	/* */


	/* Doubles * /

	var heapf64 = new Float64Array(Ammo.HEAPF32.buffer);
	var ptr = Ammo.allocate(points.length, "double", Ammo.ALLOC_NORMAL);

	for (f = 0, fMax = xdiv*zdiv; f < fMax; f++) {
	// heapf64[(ptr>>3)+f] = points[f];
	Ammo.setValue(ptr+(f<<3), points[f], 'double');
	console.log("Input Position["+(f<10?" ":"")+f+"]: "+Ammo.getValue(ptr+(f<<3), 'double'));
	}

	btShape = new Ammo.btHeightfieldTerrainShape(xdiv, zdiv, ptr, 1, -maxHeight, maxHeight, upIndex, scalarType.DOUBLE, flipQuadEdges);
	/* */

	console.log("-----------------");

	for (var i = 0; i < zdiv; i++) {
	for (var j = 0; j < xdiv; j++) {
	var idx = (i*xdiv+j);
	console.log("Read position ["+(idx<10?" ":"")+idx+"] = "+btShape.getRawHeightFieldValue(j,i));
	}
	}

	</script>
	</head>
	<body>
	<br/>Check the console...<br/>
	</body>
	</html>