Steema Issues Database

Note: This database is for bugs and wishes only. For technical support help, if you are a customer please visit our online forums;
otherwise you can use StackOverflow.
Before using this bug-tracker we recommend a look at this document, Steema Bug Fixing Policy.



Bug 2209 - Tri-Surface plot incorrect.
Summary: Tri-Surface plot incorrect.
Status: CONFIRMED
Alias: None
Product: .NET TeeChart
Classification: Unclassified
Component: Series (show other bugs)
Version: unspecified
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Steema Issue Manager
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-17 03:52 EDT by christopher ireland
Modified: 2019-06-19 06:00 EDT (History)
0 users

See Also:
Chart Series: Surface 3D
Delphi / C++ Builder RAD IDE Version:

Attachments
matplotlib python script (862 bytes, application/zip)
2019-06-17 03:52 EDT, christopher ireland 		Details
Reference Charts (366.86 KB, application/x-zip-compressed)
2019-06-19 06:00 EDT, christopher ireland 		Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description christopher ireland 2019-06-17 03:52:49 EDT 
Created attachment 916 [details]
matplotlib python script

Following is the code that reproduces the issue in TeeChart, using either the original dataset (commented out) or the dataset with rounded values:

        TChart _tChart1 = new TChart();

        private void InitializeChart()
        {
            _tChart1.Aspect.View3D = true;
            _tChart1.Aspect.Orthogonal = false;
            _tChart1.Aspect.Chart3DPercent = 70;
            _tChart1.Aspect.Zoom = 70;
            _tChart1.Zoom.Direction = ZoomDirections.None;

            var triSurface1 = new TriSurface(_tChart1.Chart);

            triSurface1.Add(70.87708, -0.0037910156, -89);
            triSurface1.Add(77.8765259, -0.004736457, -89);
            triSurface1.Add(84.87651, -0.005923081, -89);
            triSurface1.Add(99.87336, -0.00617740676, -89);
            triSurface1.Add(103.42186, -0.00537797436, -89);
            triSurface1.Add(74.6291656, -0.00220004469, -29);
            triSurface1.Add(81.12918, -0.00317465514, -29);
            triSurface1.Add(87.62896, -0.004013799, -29);
            triSurface1.Add(119.628136, -0.00334364548, -29);
            triSurface1.Add(130.126541, -0.00223023072, -29);
            triSurface1.Add(131.121841, -0.000582817942, -29);
            triSurface1.Add(133.311157, 0.0006279759, -29);
            triSurface1.Add(75.63139, 0.000198617578, 30);
            triSurface1.Add(81.13118, -0.000831447542, 30);
            triSurface1.Add(86.13106, -0.00180248171, 30);
            triSurface1.Add(117.128227, -0.00112938136, 30);
            triSurface1.Add(124.127037, -0.000166196376, 30);
            triSurface1.Add(130.128937, 0.0005509816, 30);
            triSurface1.Add(131.124237, 0.00201805681, 30);
            triSurface1.Add(132.930054, 0.00324816257, 30);
            triSurface1.Add(133.990723, 0.003601469, 30);

            //triSurface1.Add(70.87708, -0.0037910156, -89.96313);
            //triSurface1.Add(77.8765259, -0.004736457, -89.96303);
            //triSurface1.Add(84.87651, -0.005923081, -89.9628754);
            //triSurface1.Add(99.87336, -0.00617740676, -89.96268);
            //triSurface1.Add(103.42186, -0.00537797436, -89.96245);
            //triSurface1.Add(74.6291656, -0.00220004469, -29.96283);
            //triSurface1.Add(81.12918, -0.00317465514, -29.96278);
            //triSurface1.Add(87.62896, -0.004013799, -29.9627438);
            //triSurface1.Add(119.628136, -0.00334364548, -29.96263);
            //triSurface1.Add(130.126541, -0.00223023072, -29.96258);
            //triSurface1.Add(131.121841, -0.000582817942, -29.96258);
            //triSurface1.Add(133.311157, 0.0006279759, -29.96258);
            //triSurface1.Add(75.63139, 0.000198617578, 30.0375214);
            //triSurface1.Add(81.13118, -0.000831447542, 30.0375214);
            //triSurface1.Add(86.13106, -0.00180248171, 30.0375214);
            //triSurface1.Add(117.128227, -0.00112938136, 30.0375214);
            //triSurface1.Add(124.127037, -0.000166196376, 30.0374718);
            //triSurface1.Add(130.128937, 0.0005509816, 30.0374718);
            //triSurface1.Add(131.124237, 0.00201805681, 30.0374718);
            //triSurface1.Add(132.930054, 0.00324816257, 30.03742);
            //triSurface1.Add(133.990723, 0.003601469, 30.03742);

            triSurface1.HideTriangles = false;

            _tChart1.Tools.Add(typeof(Rotate));
        }

Attached is a python script which uses Matplotlib to plot the same dataset, and which seems to plot the dataset perfectly.
Comment 2 christopher ireland 2019-06-19 06:00:48 EDT 
Created attachment 917 [details]
Reference Charts

Further to this.

TChart's TriSurface renders the first 10 points of this dataset correctly (compare TChart's FirstTen.png with Matplotlib's FirstTen_lib.png). However, TChart cannot render the last ten points correctly (LastTen.png vs. LastTen_lib.png) neither can it render the first eleven points correctly (FirstEleven.png vs. FirstEleven_lib.png)