internal Rayd CastFromCamera(GraphicsDevice graphicsDevice, Vector2 mouseVector)
{
Matrixd worldd = Matrixd.CreateRotationZ(-cameraRotX) * Matrixd.CreateRotationX(cameraRotY);
double distance = 9 * Math.Pow(0.5, cameraZoom);
Matrixd viewd = CameraMatrixManager.GetWorldViewd(distance);
Matrixd projectiond = CameraMatrixManager.GetWorldProjectiond(distance, graphicsDevice.Viewport.AspectRatio);
return(Rayd.CastFromCamera(graphicsDevice, mouseVector.X, mouseVector.Y, projectiond, viewd, worldd));
}
// yup, it returns lat/long only in the range you'd expect
internal Vector3d GetLatLongOfCoord(GraphicsDevice graphicsDevice, double x, double y)
{
Matrixd worldd = Matrixd.CreateRotationZ(-cameraRotX) * Matrixd.CreateRotationX(cameraRotY);
double distance = 9 * Math.Pow(0.5, cameraZoom);
Matrixd viewd = CameraMatrixManager.GetWorldViewd(distance);
Matrixd projectiond = CameraMatrixManager.GetWorldProjectiond(distance, graphicsDevice.Viewport.AspectRatio);
Rayd ray = Rayd.CastFromCamera(graphicsDevice, x, y, projectiond, viewd, worldd);
Vector3d intersection = ray.IntersectionSphere(new Vector3d(0, 0, 0), 1); // angle 0
if (intersection == null)
{
return(null);
}
return(ToLatLong(intersection));
}
private Matrixd CreateShipWVP(RenderContext renderContext, double rotation)
{
double fakeScale = Math.Max(Math.Pow(2, 21 - camera.cameraZoom), 1); // make the ship bigger to account for depth buffer limitations
Vector3d shipPos = position;
// earth radius 6371 km
double shipScale = fakeScale / 6371000;
double distanceFromCamera = 30; // in meters
Matrixd world = Matrixd.CreateRotationZ(-camera.cameraRotX) * Matrixd.CreateRotationX(camera.cameraRotY); // eh.... think hard on this later
double distance = 9 * Math.Pow(0.5, camera.cameraZoom);
shipPos += position.WalkNorth(-Math.PI / 4) * (distance * 2 - distanceFromCamera * shipScale); // why distance * 2??
Matrixd view = CameraMatrixManager.GetWorldViewd(distance);
Matrixd projection = CameraMatrixManager.GetWorldProjectiond(distance, renderContext.graphicsDevice.Viewport.AspectRatio);
Matrixd worldWVP = world * view * projection;
Matrixd shipRot = Matrixd.CreateRotationZ(rotation + Math.PI) * Matrixd.CreateRotationX(Math.PI / 2 - camera.cameraRotY) * Matrixd.CreateRotationZ(camera.cameraRotX);
return(shipRot * Matrixd.CreateScale(shipScale) * Matrixd.CreateTranslation(shipPos) * worldWVP);
}
private void Draw3D(GraphicsDevice graphicsDevice, SectorBounds bounds, ISector rootSector, RenderContext.LayerPass layerPass)
{
double relativeCameraZoom = camera.cameraZoom - Math.Log(ZCoords.GetSectorManager().GetTopmostOSMSectors().Count, 4) + (Game1.RECORDING ? 1 : 0);
int zoomLevel = Math.Min(Math.Max((int)(relativeCameraZoom - 3), 0), ZCoords.GetSectorManager().GetHighestOSMZoom());
List <ISector> containedSectors = rootSector.GetSectorsInRange(bounds.minX, bounds.maxX, bounds.minY, bounds.maxY, zoomLevel);
List <ISector> sorted = containedSectors.Where(x => x.GetRoot().Equals(rootSector)).ToList();
sorted.Sort((x, y) => x.Zoom.CompareTo(y.Zoom));
foreach (var sector in sorted)
{
IGraphicsBuffer buffer = loadedMaps[sector];
if (buffer is ImageTileBuffer)
{
continue;
}
SectorBounds b = new SectorBounds(bounds.minX * (1 << sector.Zoom) - sector.X, bounds.maxX * (1 << sector.Zoom) - sector.X, bounds.minY * (1 << sector.Zoom) - sector.Y, bounds.maxY * (1 << sector.Zoom) - sector.Y);
SectorBounds limitedB = new SectorBounds(Math.Max(0, Math.Min(1, b.minX)), Math.Max(0, Math.Min(1, b.maxX)), Math.Max(0, Math.Min(1, b.minY)), Math.Max(0, Math.Min(1, b.maxY)));
BasicEffect basicEffect = new BasicEffect(graphicsDevice);
camera.ApplyMatrices(basicEffect);
// going to make it easy and assume the shape is perfectly parallel (it's not)
// the sector plane is constructed by flattening the visible portion of the sphere, basically
Vector3d v1 = sector.ProjectToSphereCoordinates(new Vector2d(limitedB.minX, limitedB.minY));
Vector3d v2 = sector.ProjectToSphereCoordinates(new Vector2d(limitedB.maxX, limitedB.minY));
Vector3d v3 = sector.ProjectToSphereCoordinates(new Vector2d(limitedB.minX, limitedB.maxY));
Vector3d xAxis = (v2 - v1) / (limitedB.maxX - limitedB.minX);
Vector3d yAxis = (v3 - v1) / (limitedB.maxY - limitedB.minY);
Vector3d start = v1 - xAxis * limitedB.minX - yAxis * limitedB.minY;
Vector3d zAxis = start * (xAxis.Length() + yAxis.Length()) / start.Length() / 2; // make this roughly the same length
// matrixes copied over
Matrixd world = Matrixd.CreateRotationZ(-camera.cameraRotX) * Matrixd.CreateRotationX(camera.cameraRotY); // eh.... think hard on this later
double distance = 9 * Math.Pow(0.5, camera.cameraZoom);
Matrixd view = CameraMatrixManager.GetWorldViewd(distance);
Matrixd projection = CameraMatrixManager.GetWorldProjectiond(distance, graphicsDevice.Viewport.AspectRatio);
Matrixd transformMatrix = new Matrixd(xAxis.X, xAxis.Y, xAxis.Z, 0, yAxis.X, yAxis.Y, yAxis.Z, 0, zAxis.X, zAxis.Y, zAxis.Z, 0, start.X, start.Y, start.Z, 1); // turns our local coordinates into 3d spherical coordinates, based on the sector
Matrixd WVP = Normalize(transformMatrix * world * view * projection); // combine them all to allow for higher precision
RenderContext context = new RenderContext(graphicsDevice, WVP, b.minX, b.maxX, b.minY, b.maxY, camera.cameraZoom, layerPass);
buffer.Draw(context);
}
}