Can't translate properly TextLayout Vector on OnRender()

[franjcy]

Morning.

I'm trying to nest a text to a manual hand moving line (in the center of the line), but when i'm trying to translate / move the text on code i'm getting unexpected results on screen.

What I'm doing first is getting the angle of the line and then rotate the text. After, I reset the rotation.

My actual code is:

SharpDX.Direct2D1.Brush textBrushDx;
textBrushDx = textBrush.ToDxBrush(RenderTarget);
NinjaTrader.Gui.Tools.SimpleFont simpleFont = chartControl.Properties.LabelFont ?? new NinjaTrader.Gui.Tools.SimpleFont("Arial", 16);
SharpDX.DirectWrite.TextFormat textFormat1 = simpleFont.ToDirectWriteTextFormat();
SharpDX.DirectWrite.TextFormat textFormat2 = Font.ToDirectWriteTextFormat();
SharpDX.DirectWrite.TextLayout textLayout = new SharpDX.DirectWrite.TextLayout(NinjaTrader.Core.Globals.DirectWriteFactory, text, textFormat2, 400, textFormat1.FontSize);
textFormat1.TextAlignment = SharpDX.DirectWrite.TextAlignment.Center;
textFormat2.TextAlignment = SharpDX.DirectWrite.TextAlignment.Center;
double offsetX = 0;
double offsetY = 0;
Point textPoint = new Point();
textPoint.X = ((startPointAdjusted.X + endPointAdjusted.X) / 2);
textPoint.Y = ((startPointAdjusted.Y + endPointAdjusted.Y) / 2);                

// Rotate and draw the text              

float anguloLineaRecta = (float)GetAngle(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);

SharpDX.Vector2 puntoTextoCentrado = new SharpDX.Vector2((float)(textPoint.X + offsetX), (float)(textPoint.Y + offsetY));

RenderTarget.Transform = Matrix3x2.Rotation((float)(Math.PI * anguloLineaRecta) / 180, puntoTextoCentrado);
RenderTarget.DrawTextLayout(puntoTextoCentrado, textLayout, textBrushDx, SharpDX.Direct2D1.DrawTextOptions.NoSnap);
RenderTarget.Transform = Matrix3x2.Identity;

I tried multiply when rotating with the intention of moving text properly (I saw this on some code but i don't understand it).

RenderTarget.Transform = Matrix3x2.Rotation((float)(Math.PI * anguloLineaRecta) / 180, puntoTextoCentrado) * Matrix3x2.Translation(textLayout.Metrics.Width / 2, textLayout.Metrics.Height / 2);

I uploaded 3 images: Text without moving its position, when i tried translate and what i want.

Thanks.

Caption

[NinjaTrader_ChelseaB]

Hello franjcy,

This would require some advanced calculations and custom logic.

This thread will remain open for any community members that would like to write these calculations on your behalf.

You can also contact a professional NinjaScript Consultant who would be eager to create or modify this script at your request or assist you with your script. The NinjaTrader Ecosystem has affiliate contacts who provide educational as well as consulting services. Please let me know if you would like a list of affiliate consultants who would be happy to create this script or any others at your request or provide one on one educational services.

[franjcy]

Hello franjcy,

This would require some advanced calculations and custom logic.

This thread will remain open for any community members that would like to write these calculations on your behalf.

You can also contact a professional NinjaScript Consultant who would be eager to create or modify this script at your request or assist you with your script. The NinjaTrader Ecosystem has affiliate contacts who provide educational as well as consulting services. Please let me know if you would like a list of affiliate consultants who would be happy to create this script or any others at your request or provide one on one educational services.

Thanks for your answer.

I'd like a solution of any could give me. I think i'm very close to the solution.

Or any example where someone do this "calculations" or vector operations.

[franjcy]

Hello franjcy,

This would require some advanced calculations and custom logic.

This thread will remain open for any community members that would like to write these calculations on your behalf.

You can also contact a professional NinjaScript Consultant who would be eager to create or modify this script at your request or assist you with your script. The NinjaTrader Ecosystem has affiliate contacts who provide educational as well as consulting services. Please let me know if you would like a list of affiliate consultants who would be happy to create this script or any others at your request or provide one on one educational services.

I solved this, I'm attaching the code to some needs it:

                // Calcular punto medio de la línea
                SharpDX.Vector2 midPoint = new Vector2((startVec.X + endVec.X) / 2, (startVec.Y + endVec.Y) / 2);  //vector perpendicular ?

                // Calcular ángulo y  rotación
                SharpDX.Vector2 delta = new Vector2(endVec.X - startVec.X, endVec.Y - startVec.Y);
                double angle = Math.Atan2(delta.Y, delta.X); //ángulo para rotar el texto de manera que sea perpendicular a la línea.
                SharpDX.Vector2 normalVector; //es perpendicular a la línea
                if (TextoEncimaDeLinea)
                {
                    normalVector = new Vector2(delta.Y, -delta.X); //el vector de desplazamiento se calcula como
                }
                else
                {
                    normalVector = new Vector2(-delta.Y, delta.X);
                }            
                normalVector = Vector2.Normalize(normalVector);
                SharpDX.Vector2 offset = normalVector * SeparacionTextoLinea;
                SharpDX.Vector2 textPosition = midPoint + offset;

                // Adjust text position to center the text around textPosition              

                SharpDX.Vector2 adjustedTextPosition = new Vector2(textPosition.X - textLayout.Metrics.Width / 2, textPosition.Y);


                // Rotate and draw text
              
                RenderTarget.Transform = Matrix3x2.Rotation((float)angle, textPosition); ;
                RenderTarget.DrawTextLayout(adjustedTextPosition, textLayout, textBrushDx, SharpDX.Direct2D1.DrawTextOptions.NoSnap);
                RenderTarget.Transform = Matrix3x2.Identity; // Reset transformation


                // Cleanup
                textFormat1.Dispose();
                textFormat2.Dispose();  
                textLayout.Dispose();
                textBrushDx.Dispose();
                // Rotate the RenderTarget back
                RenderTarget.Transform = Matrix3x2.Identity;​