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Thursday, March 07, 2019
Our team is working hard on the next major release of TMS WEB Core. This will be TMS WEB Core v1.2 Padua. Padua is the next city after Brescia (1.0) and Verona (1.1) on our Mille Miglia race track.
With this blog, we wanted to take you to the 3rd dimension that will be added to TMS WEB Core in v1.2, that is the support for 3D graphics based on the amazing WebGL / ThreeJS technology. Thanks to this technology, rendering 3D scenes is fluid and fast right out of any modern browser. This means Chrome, FireFox, Opera, Safari on desktop and on mobile devices.
The WebGL / ThreeJS technology is powerful but it can be quite complex and daunting. Here comes the TMS WEB Core framework with easy usable classes for taking advantage of this technology.
In the upcoming TMS WEB Core this will be exposed via 3 UI controls:
Custom 3D scenes with TWebThreeJSPaintBox
The TWebThreeJSPaintBox is a simple 3D scene renderer. Where in a regular 2D PaintBox you do the drawing with lines, rectangles, ... here you can add 3D objects like cube, sphere, cylinder, text, lines, shapes, 3D models ...
Adding a red sphere becomes as simple as:
This sphere object can now be manipulated or removed again by accessing the object by its name.
var anObject: TThreeJsObject3D; begin anObject := threeJsPaintBox.addSphere(2, clRed, 10, 8, 4); anObject.name := 'sphere1'; threeJsPaintBox.Invalidate; end;
As such, the TWebThreeJSPaintBox allows to create any custom 3D scene easily using the ObjectPascal language.
3D business charts with TWebThreeJSChart
The next 3D control is the TWebThreeJSChart. This is a 3D chart with 3 axes. It allows to add series with their 3D values, select the chart type (bar, cone, line, area, cylinder, scatter) and the TWebThreeJSChart will do all that is necessary to setup the 3D scene to render the chart.
We have created a small & quick demo to demonstrate the power. This 3D chart visualizes the virtual sales results of Germany's leading car manufacturers: Audi, BMW, Mercedes, Porsche. To make the data editable to let users play with the chart, it is displayed in a TWebStringGrid. It shows 4 columns for the sales results for the 4 car manufacturers and 12 months of the year. To configure the 3D chart from the results in the TWebStringGrid, the following code is used:
It is really as simple as this. Note that you just need to create the data series and it figures out the range of values automatically. It has an Auto range mode that is smart enough to figure out the vertical value range scale and its scale marking automatically based on the minimum and maximum values in data. You can also switch off the Auto range mode and supply your own scale marking when needed.
procedure TForm2.LoadSampleSeries; var aSeries: TThreeJsChartSeries; brands: TJSArray; months: TJSArray; values: TJSArray; i,j,v: integer; begin brands := TJSArray.new; months := TJSArray.new; // create the X-axis for the series filled with the car brand names from the string row header for i := WebStringGrid1.ColCount - 1 downto 1 do brands.push(WebStringGrid1.Cells[i,0]); // create the Y-axis for the series filled with the month names for i := 1 to WebStringGrid1.RowCount - 1 do months.push(WebStringGrid1.Cells[0,i]); // create the series in the 3D chart aSeries := TThreeJsChartSeries.Create(brands, months); // loop through the normal grid cells to pick the sales values and add these to the series for i := WebStringGrid1.ColCount - 1 downto 1 do begin values := TJSArray.new; for j := 1 to WebStringGrid1.RowCount - 1 do begin v := StrToInt(WebStringGrid1.Cells[i,j]); values.push(v); end; aSeries.addLegendRow(WebStringGrid1.Cells[i,0], values); end; // set the general 3D chart properties aSeries.AutoMarkValueAxis := true; aSeries.valueFormatFloat := '#,##0'; aSeries.valueAxisFormatFloat := ''; //use the above aSeries.Title := 'Monthly unit sales per brand'; aSeries.ValueAxisTitle := 'Monthly Sales'; aSeries.LegendAxisTitle := 'Brands'; aSeries.CategoryAxisTitle := 'Months'; threeJsChart.Series := aSeries; end;
The code results in the following 3D chart or you can play with it directly from your browser.
Mathematical surfaces with TWebThreeJsMathChart
Finally, the last 3D control is the TWebThreeJsMathChart that is specialized in mathematical surface rendering, both with wireframe and solid surfaces.
TWebThreeJsMathChart is based on a TThreeJsMathChartSeries that is set for the 3D chart and this TThreeJsMathChartSeries implements a callback function that will query the mathematical formula calculation. The setup for the math chart and the X and Y range wherein the result needs to be calculated is set via:
begin aSeries := TThreeJsMathChartSeries.Create; aSeries.addParametricSurface(-10, +10, -10, +10, resolution, @surfaceCallBack); aSeries.Title := '3D Surface'; aSeries.ZAxisTitle := 'Values'; aSeries.YAxisTitle := 'Y-axis'; aSeries.XAxisTitle := 'X-axis'; threeJSMathChart.Series := aSeries; end;
As we demonstrate a number of different mathematical functions to visualize in the demo, the callback function is implemented as:
function TForm2.surfaceCallBack(x, y: double): double; begin // the function is selected via the combobox cbSeries case cbSeries.ItemIndex of 1: Result := abs(x-y); 2: Result := -x*x - y*y + 6; 3: Result := sin(x)*x+cos(y)*y; 4: Result := 2 * sqrt(x*x/3 + y*y/8); 5: Result := sqrt(abs(1.5 * (x*x/3 - y*y/4) - 6)); 6: Result := 8 * (sin(x) + cos(y)); else Result := x*x + y*y; end; end;
It's really nothing more than this before you can start drooling over the wonderful world of 3D mathematical functions.
You can see it live from your own browser here.
Meanwhile, you can go ahead and explore the new & exciting territories of web client development that become available for Delphi developers with TMS WEB Core! You can download the trial version that is generally available, go ahead with the standalone version you purchased or with TMS WEB Core and additional tools that are all included in TMS ALL-ACCESS. Our team looks forward to all your comments, feedback, feature-requests to help steering the development of TMS WEB Core to the next stages!
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