Posted by Julia Skorobogata on 13 July 2021 11:09 AM
We are pleased to announce that the SciChart WPF v6.4 build 13629 has now been released! This update includes new features, a number of bug fixes, and minor enhancements requested by users since version 6.3.x. This release is a drop-in replacement for 6.x and it is recommended for all users to update.
Enabling UseAlternativeFillSource slightly changes the drawing pipeline. This method reads the rendered output back from GPU memory to main memory before setting it on a WPF image in a bitmap, sending it back to the GPU. The performance impact caused by this change is insignificant (about a millisecond on modern GPUs) and can be neglected.
To disable it please set static property VisualXcceleratorEngine.UseAlternativeFillSource to “False” anywhere in code.
New Features and examples
3D light modes
This feature introduces dynamic scene lighting to SciChart 3D. It allows users to control the light direction in 3D charts. It is enabled on the SciChart3DSurface using Viewport3D methods. The Viewport3D is attached to the SciChart3DSurface.Viewport3D property and may be used to customize the presentation of the 3D Scene.
To use it, you have to set LightMode to “GlobalSpace” on the current Viewport3D instance:
Then LightDirection can be set as a vector in global space coordinates:
var vector = viewport.GetMainLightDirection();
vector.x = 0.25f;
vector.y = 0.5f;
vector.z = -0.5f;
The LightDirection vector is normalized, so its components can obtain values from -1 to 1.
You can try it in our examples demo. Clicking LD button on the left lets switching between main light modes. You can also change X,Y,Z light direction properties to see how the viewport of the 3D Chart changes.
Multiple Axis Markers for the SeriesValueModifier on a composite renderable series
This feature allows adding multiple axis markers for the SeriesValueModifier on composite renderable series. By default, SeriesValueModifier shows multiple axis markers for the following composite series: – Band Series – Digital Band Series – Grouped Column Series – Stacked Column Series – Stacked Mountain Series
If you need to create additional SeriesValue markers, you can inherit the default SeriesInfo provider and override the OnAppendDataColumnInfo method.
SeriesInfoProvider allows Modifiers to receive multiple information units from a single RenderableSeries. This is useful when there is a need to show several feedbacks, for instance, multiple AxisMarkers per one RenderableSeries with SeriesValueModifier. SeriesInfoProvider must implement the ISeriesInfoProvider interface and can be assigned to a RenderableSeries via the SeriesInfoProvider property.
This is a very often asked question on our forums and support desk. Our team has created an off-screen export example that shows how to export a single chart, export multiple charts, and export with cloning.
Example UI and Single Chart Off-screen export
The example interface is simple and will save a png file of a chart that is created in code into the folder that you choose.
Export Multiple Charts
This exports multiple charts with different line thicknesses and colors, for example.
Export with Cloning
Allows exporting an image with a different size. When a user will be calling surface.ExportToFile(path, ExportType.Png, false, new Size(1200, 1200)), for example, will allow us to create a chart clone in code and then change its size. As the result, we can export a cloned chart of any size!