71 lines
2.9 KiB
Java
71 lines
2.9 KiB
Java
package ScanGraph;
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import org.junit.jupiter.api.Test;
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import Vector.Vector;
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import java.lang.reflect.Array;
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import java.util.ArrayList;
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import static org.junit.jupiter.api.Assertions.*;
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class ScanMatcherTest {
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/**
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* @brief Generate a scan point from a scan description
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* @param offset The offset of the scan point from the origin
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* @param scanDescription A vector which describes the length of the line and direction of the line
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* @return A scan point with the given offset and scan description
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*/
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ScanPoint generateScanPoint(Vector offset, Vector scanDescription){
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// generate a scan point with the given offset and scan description
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Vector scanPosition = new Vector(0, 0);
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ArrayList<Vector> scan = new ArrayList<>();
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// calculate the total number of points in the scan
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int numPoints = (int) scanDescription.mag();
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// calculate the slope of the line the scan is on
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float m = scanDescription.y / scanDescription.x;
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// add the points to the scan
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for(int i = 0; i < numPoints; i++){
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float x = i;
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float y = m * x;
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scan.add(new Vector(x + offset.x, y + offset.y));
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}
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return new ScanPoint(scanPosition, 0, scan);
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}
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@Test
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void applyRotationAndTranslationMatrices() {
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// generate one scan that is level and another that is rotated 45 degrees.
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Vector scanDescription = new Vector(10, 0);
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ScanPoint referenceScan = generateScanPoint(new Vector(0, 0), scanDescription);
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ScanPoint newScan = generateScanPoint(new Vector(0, 0), scanDescription.rotate2D((float) Math.PI / 4));
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// calculate the rotation and translation matrices between the two scans
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ScanMatcher matcher = new ScanMatcher();
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matcher.calculateRotationAndTranslationMatrices(referenceScan, newScan);
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// apply the rotation and translation matrices to the new scan
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ScanPoint newScanWithRotationAndTranslation = matcher.applyRotationAndTranslationMatrices(newScan);
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// Get the first and last points of the new scan with rotation and translation and calculate the angle between them
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ArrayList<Vector> points = newScanWithRotationAndTranslation.getPoints();
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Vector firstPoint = points.get(0);
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Vector lastPoint = points.get(points.size() - 1);
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float angle = firstPoint.angleDiff(lastPoint);
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// The angle between the first and last points should be zero
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assertEquals(0, angle);
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}
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@Test
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void getError() {
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// generate two scans that are the same. The error should be zero.
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ScanPoint scan1 = generateScanPoint(new Vector(0, 0), new Vector(10, 10));
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ScanPoint scan2 = generateScanPoint(new Vector(0, 0), new Vector(10, 10));
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ScanMatcher matcher = new ScanMatcher();
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matcher.calculateRotationAndTranslationMatrices(scan1, scan2);
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assertEquals(0, matcher.getError(scan1, scan2));
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}
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} |