This example demonstrates how to use Contour API for a 3D Surface Mesh in SciChart for your Android applications. You may configure the contours by defining thickness, stroke color, opacity, offsets, intervals or even omit contours.

Please see details in SciChart Android 3D documentation article for Configuring Contours on Surface Meshes.

// example_single_chart3d_fragment.xml

<?xml version="1.0" encoding="utf-8"?><!--*************************************************************************-->
<!-- SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved. -->
<!--   -->
<!-- Web: http://www.scichart.com -->
<!-- Support: support@scichart.com -->
<!-- Sales:   sales@scichart.com -->
<!--  -->
<!-- example_single_chart3d_fragment.xml is part of the SCICHART® Examples. Permission is hereby granted -->
<!-- to modify, create derivative works, distribute and publish any part of this source -->
<!-- code whether for commercial, private or personal use. -->
<!--  -->
<!-- The SCICHART® examples are distributed in the hope that they will be useful, but -->
<!-- without any warranty. It is provided "AS IS" without warranty of any kind, either -->
<!-- expressed or implied. -->
<!--*************************************************************************-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.scichart.charting3d.visuals.SciChartSurface3D
        android:id="@+id/chart3d"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

// SurfaceMeshContours3DChartFragment.java

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SurfaceMeshContours3DChartFragment.java is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

package com.scichart.examples.fragments.charts3d;

import com.scichart.charting3d.model.dataSeries.grid.UniformGridDataSeries3D;
import com.scichart.charting3d.visuals.SciChartSurface3D;
import com.scichart.charting3d.visuals.axes.NumericAxis3D;
import com.scichart.charting3d.visuals.camera.Camera3D;
import com.scichart.charting3d.visuals.renderableSeries.data.DrawMeshAs;
import com.scichart.charting3d.visuals.renderableSeries.data.GradientColorPalette;
import com.scichart.charting3d.visuals.renderableSeries.surfaceMesh.SurfaceMeshRenderableSeries3D;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.examples.R;
import com.scichart.examples.fragments.base.ExampleBaseFragment;

import butterknife.BindView;

import static com.scichart.drawing.utility.ColorUtil.Aqua;
import static com.scichart.drawing.utility.ColorUtil.Brown;
import static com.scichart.drawing.utility.ColorUtil.BurlyWood;
import static com.scichart.drawing.utility.ColorUtil.DarkKhaki;
import static com.scichart.drawing.utility.ColorUtil.DarkOrange;
import static com.scichart.drawing.utility.ColorUtil.DarkSalmon;
import static com.scichart.drawing.utility.ColorUtil.ForestGreen;
import static com.scichart.drawing.utility.ColorUtil.Green;
import static com.scichart.drawing.utility.ColorUtil.GreenYellow;
import static com.scichart.drawing.utility.ColorUtil.SaddleBrown;

public class SurfaceMeshContours3DChartFragment extends ExampleBaseFragment {
    @BindView(R.id.chart3d)
    SciChartSurface3D surface3d;

    @Override
    protected int getLayoutId() {
        return R.layout.example_single_chart3d_fragment;
    }

    @Override
    protected void initExample() {
        final Camera3D camera = sciChart3DBuilder.newCamera3D().withPosition(-1300, 1300, -1300).build();

        final NumericAxis3D xAxis = sciChart3DBuilder.newNumericAxis3D().build();
        final NumericAxis3D yAxis = sciChart3DBuilder.newNumericAxis3D().build();
        final NumericAxis3D zAxis = sciChart3DBuilder.newNumericAxis3D().build();

        final int w = 64;
        final int h = 64;

        double ratio =  200.0 / 64.0;

        final UniformGridDataSeries3D<Double, Double, Double> ds = new UniformGridDataSeries3D<>(Double.class, Double.class, Double.class, w, h);
        ds.setStepX(0.01);
        ds.setStepZ(0.01);

        for (int x = 0; x < w; x++) {
            for (int z = 0; z < h; z++) {
                final double v = (1 + Math.sin(x * 0.04 * ratio)) * 50 + (1 + Math.sin(z * 0.1* ratio)) * 50;
                final double cx = w / 2d;
                final double cy = h / 2d;
                final double r = Math.sqrt((x - cx) * (x - cx) + (z - cy) * (z - cy))* ratio;
                final double exp = Math.max(0, 1 - r * 0.008);
                final double zValue = v * exp;

                ds.updateYAt(x, z, zValue);
            }
        }

        final int[] colors = new int[]{Aqua, Green, ForestGreen, DarkKhaki, BurlyWood, DarkSalmon, GreenYellow, DarkOrange, SaddleBrown, Brown, Brown};
        final float[] stops = new float[]{0, .1f, .2f, .3f, .4f, .5f, .6f, .7f, .8f, .9f, 1};

        final SurfaceMeshRenderableSeries3D rs = sciChart3DBuilder.newSurfaceMeshSeries3D()
                .withDataSeries(ds)
                .withDrawMeshAs(DrawMeshAs.SolidWithContours)
                .withContourStrokeThickness(2f)
                .withStroke(0x77228B22)
                .withMaximum(150)
                .withStrokeThicknes(1f)
                .withDrawSkirt(true)
                .withMeshColorPalette(new GradientColorPalette(colors, stops))
                .withOpacity(0.8f)
                .build();

        UpdateSuspender.using(surface3d, new Runnable() {
            @Override
            public void run() {
                surface3d.getWorldDimensions().assign(600, 300, 300);

                surface3d.setCamera(camera);

                surface3d.setXAxis(xAxis);
                surface3d.setYAxis(yAxis);
                surface3d.setZAxis(zAxis);

                surface3d.getRenderableSeries().add(rs);

                surface3d.getChartModifiers().add(sciChart3DBuilder.newModifierGroupWithDefaultModifiers().build());
            }
        });
    }
}

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