// a helper to show the world-axis-aligned bounding box for an object
public static BoundingBoxHelper Create(Renderer renderer, Object3D o, Color? color = null)
{
var c = color.HasValue ? color.Value : new Color(0x888888);
var geo = new BoxGeometry(1, 1, 1);
var mat = new MeshBasicMaterial(renderer)
{
Diffuse = c,
UseWireframe = true
};
var boundingBoxHelper = new BoundingBoxHelper(geo, mat);
boundingBoxHelper.o = o;
boundingBoxHelper.box = Box3.Empty;
return boundingBoxHelper;
}
static void Main(string[] args)
{
var mediaPath = Path.GetFullPath("../../../../../js/r68/examples/");
var texturesPath = Path.Combine(mediaPath, "textures");
var renderer = new Renderer();
var scene = new Scene()
{
//Fog = new FogExp2(Color.Blue, 0.24f)
};
var camera = new OrthographicCamera(renderer, -1000, 1000)
{
Position = new Vector3(0, 0, 2)
};
//// create a point light
scene.Add(new DirectionalLight(Color.White)
{
Target = Vector3.UnitX
});
var geometry = new BoxGeometry(20, 20, 20);
for (var i = 0; i < 2000; i++)
{
var o = new Mesh(geometry, new MeshLambertMaterial(renderer) { Diffuse = Color.Random() });
o.Position = new Vector3(Mathf.RandomF(-400, 400), Mathf.RandomF(-400, 400), Mathf.RandomF(-400, 400));
o.Rotation = new Euler(Mathf.Tau * Mathf.RandomF(), Mathf.Tau * Mathf.RandomF(), Mathf.Tau * Mathf.RandomF());
o.Scale = new Vector3(Mathf.RandomF(0.5f, 1.5f), Mathf.RandomF(0.5f, 1.5f), Mathf.RandomF(0.5f, 1.5f));
scene.Add(o);
}
var raycaster = new Raycaster();
Object3D INTERSECTED = null;
Color previousColor = Color.White;
var radius = 100;
var previousTime = 0f;
var stopwatch = Stopwatch.StartNew();
while (!renderer.Done)
{
var now = (float)stopwatch.Elapsed.TotalSeconds;
var deltaTime = now - previousTime;
previousTime = now;
var offset = now / 4;
var sin = Mathf.Sin(offset) * radius;
var cos = Mathf.Cos(offset) * radius;
camera.Position = new Vector3(sin, sin, cos);
camera.LookAt(Vector3.Zero);
#region FindIntersections
var vector = Projector.UnprojectVector(new Vector3(renderer.MousePositionNormalized,-1),camera.projectionMatrix, camera.matrixWorld);
var direction = new Vector3(0, 0, -1);
direction.TransformDirection(camera.matrixWorld);
raycaster.Set(vector, direction);
var intersects = raycaster.IntersectObjects(scene.Children);
if (intersects != null && intersects.Count > 0)
{
var first = intersects[0];
if (INTERSECTED != first.Object)
{
if (INTERSECTED != null)
{
var basic = INTERSECTED.Material as MeshLambertMaterial;
basic.Emissive = previousColor;
}
var firstMat = first.Object.Material as MeshLambertMaterial;
INTERSECTED = first.Object;
previousColor = firstMat.Emissive;
firstMat.Emissive = Color.Red;
}
}
else
{
if (INTERSECTED != null)
{
(INTERSECTED.Material as MeshLambertMaterial).Emissive = previousColor;
}
INTERSECTED = null;
}
#endregion
renderer.RenderFrame(scene, camera);
}
}
