private void Render()
{
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
Matrix4 modelview = Matrix4.LookAt(0, 0, _realCamera.Z, 0, 0, 0, 0, 1, 0);
GL.LoadMatrix(ref modelview);
GL.Rotate(_realCamera.Yaw, Vector3.UnitX);
GL.Rotate(_realCamera.Roll, Vector3.UnitY);
GL.Rotate(_realCamera.Pan, Vector3.UnitZ);
//Draw things
GL.Color3(Color);
GL.PointSize(PointSize);
GL.Disable(EnableCap.Lighting);
_pointCloudRenderer.Draw();
_gridRenderer.Draw();
GL.Enable(EnableCap.Lighting);
_objectRenderer.Draw();
SwapBuffers();
}
public void OnDrawFrame(IGL10 gl)
{
// Clear screen to notify driver it should not load any pixels from previous frame.
GLES20.GlClear(GLES20.GlColorBufferBit | GLES20.GlDepthBufferBit);
if (mSession == null)
{
return;
}
// Notify ARCore session that the view size changed so that the perspective matrix and the video background
// can be properly adjusted
mDisplayRotationHelper.UpdateSessionIfNeeded(mSession);
try
{
// Obtain the current frame from ARSession. When the configuration is set to
// UpdateMode.BLOCKING (it is by default), this will throttle the rendering to the
// camera framerate.
Frame frame = mSession.Update();
Camera camera = frame.Camera;
// Handle taps. Handling only one tap per frame, as taps are usually low frequency
// compared to frame rate.
MotionEvent tap = null;
mQueuedSingleTaps.TryDequeue(out tap);
if (tap != null && camera.TrackingState == TrackingState.Tracking)
{
foreach (var hit in frame.HitTest(tap))
{
var trackable = hit.Trackable;
// Check if any plane was hit, and if it was hit inside the plane polygon.
if (trackable is Plane && ((Plane)trackable).IsPoseInPolygon(hit.HitPose))
{
// Cap the number of objects created. This avoids overloading both the
// rendering system and ARCore.
if (mAnchors.Count >= 16)
{
mAnchors[0].Detach();
mAnchors.RemoveAt(0);
}
// Adding an Anchor tells ARCore that it should track this position in
// space. This anchor is created on the Plane to place the 3d model
// in the correct position relative to both the world and to the plane
mAnchors.Add(hit.CreateAnchor());
// Hits are sorted by depth. Consider only closest hit on a plane.
break;
}
}
}
// Draw background.
mBackgroundRenderer.Draw(frame);
// If not tracking, don't draw 3d objects.
if (camera.TrackingState == TrackingState.Paused)
{
return;
}
// Get projection matrix.
float[] projmtx = new float[16];
camera.GetProjectionMatrix(projmtx, 0, 0.1f, 100.0f);
// Get camera matrix and draw.
float[] viewmtx = new float[16];
camera.GetViewMatrix(viewmtx, 0);
// Compute lighting from average intensity of the image.
var lightIntensity = frame.LightEstimate.PixelIntensity;
// Visualize tracked points.
var pointCloud = frame.AcquirePointCloud();
mPointCloud.Update(pointCloud);
mPointCloud.Draw(camera.DisplayOrientedPose, viewmtx, projmtx);
// App is repsonsible for releasing point cloud resources after using it
pointCloud.Release();
var planes = new List <Plane>();
foreach (var p in mSession.GetAllTrackables(Java.Lang.Class.FromType(typeof(Plane))))
{
var plane = (Plane)p;
planes.Add(plane);
}
// Check if we detected at least one plane. If so, hide the loading message.
if (mLoadingMessageSnackbar != null)
{
foreach (var plane in planes)
{
if (plane.GetType() == Plane.Type.HorizontalUpwardFacing && plane.TrackingState == TrackingState.Tracking)
{
HideLoadingMessage();
break;
}
}
}
// Visualize planes.
mPlaneRenderer.DrawPlanes(planes, camera.DisplayOrientedPose, projmtx);
// Visualize anchors created by touch.
float scaleFactor = 1.0f;
foreach (var anchor in mAnchors)
{
if (anchor.TrackingState != TrackingState.Tracking)
{
continue;
}
// Get the current combined pose of an Anchor and Plane in world space. The Anchor
// and Plane poses are updated during calls to session.update() as ARCore refines
// its estimate of the world.
anchor.Pose.ToMatrix(mAnchorMatrix, 0);
// Update and draw the model and its shadow.
mVirtualObject.UpdateModelMatrix(mAnchorMatrix, scaleFactor);
mVirtualObjectShadow.UpdateModelMatrix(mAnchorMatrix, scaleFactor);
mVirtualObject.Draw(viewmtx, projmtx, lightIntensity);
mVirtualObjectShadow.Draw(viewmtx, projmtx, lightIntensity);
}
}
catch (System.Exception ex)
{
// Avoid crashing the application due to unhandled exceptions.
Log.Error(TAG, "Exception on the OpenGL thread", ex);
}
}