using System;
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using HalconDotNet;
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namespace HalconTools
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{
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/// <summary>
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/// This class demonstrates one of the possible implementations for a
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/// linear ROI. ROILine inherits from the base class ROI and
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/// implements (besides other auxiliary methods) all virtual methods
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/// defined in ROI.cs.
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/// </summary>
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public class ROILine : ROI
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{
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public double row1, col1; // first end point of line
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public double row2, col2; // second end point of line
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public double midR, midC; // midPoint of line
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private HXLDCont arrowHandleXLD;
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public ROILine()
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{
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NumHandles = 3; // two end points of line
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activeHandleIdx = 2;
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arrowHandleXLD = new HXLDCont();
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arrowHandleXLD.GenEmptyObj();
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}
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public double hrow = 0;
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public double hcol = 50;
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/// <summary>Creates a new ROI instance at the mouse position.</summary>
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public override void createROI(double midX, double midY)
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{
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midR = midY;
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midC = midX;
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row1 = midR - hrow;
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col1 = midC - hcol;
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row2 = midR + hrow;
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col2 = midC + hcol;
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updateArrowHandle();
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}
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/// <summary>Paints the ROI into the supplied window.</summary>
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public override void draw(HalconDotNet.HWindow window)
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{
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window.DispLine(row1, col1, row2, col2);
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window.DispRectangle2(row1, col1, 0, 5, 5);
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window.DispObj(arrowHandleXLD); //window.DispRectangle2( row2, col2, 0, 5, 5);
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window.DispRectangle2(midR, midC, 0, 5, 5);
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}
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/// <summary>
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/// Returns the distance of the ROI handle being
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/// closest to the image point(x,y).
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/// </summary>
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public override double distToClosestHandle(double x, double y)
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{
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double max = 10000;
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double [] val = new double[NumHandles];
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val[0] = HMisc.DistancePp(y, x, row1, col1); // upper left
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val[1] = HMisc.DistancePp(y, x, row2, col2); // upper right
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val[2] = HMisc.DistancePp(y, x, midR, midC); // midpoint
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for (int i=0; i < NumHandles; i++)
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{
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if (val[i] < max)
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{
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max = val[i];
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activeHandleIdx = i;
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}
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}// end of for
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return val[activeHandleIdx];
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}
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/// <summary>
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/// Paints the active handle of the ROI object into the supplied window.
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/// </summary>
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public override void displayActive(HalconDotNet.HWindow window)
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{
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switch (activeHandleIdx)
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{
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case 0:
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window.DispRectangle2(row1, col1, 0, 5, 5);
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break;
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case 1:
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window.DispObj(arrowHandleXLD); //window.DispRectangle2(row2, col2, 0, 5, 5);
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break;
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case 2:
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window.DispRectangle2(midR, midC, 0, 5, 5);
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break;
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}
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}
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/// <summary>Gets the HALCON region described by the ROI.</summary>
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public override HRegion getRegion()
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{
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HRegion region = new HRegion();
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region.GenRegionLine(row1, col1, row2, col2);
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return region;
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}
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public override double getDistanceFromStartPoint(double row, double col)
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{
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double distance = HMisc.DistancePp(row, col, row1, col1);
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return distance;
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}
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/// <summary>
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/// Gets the model information described by
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/// the ROI.
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/// </summary>
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public override HTuple getModelData()
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{
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return new HTuple(new double[] { row1, col1, row2, col2 });
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}
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/// <summary>
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/// Recalculates the shape of the ROI. Translation is
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/// performed at the active handle of the ROI object
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/// for the image coordinate (x,y).
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/// </summary>
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public override void moveByHandle(double newX, double newY)
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{
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double lenR, lenC;
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switch (activeHandleIdx)
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{
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case 0: // first end point
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row1 = newY;
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col1 = newX;
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midR = (row1 + row2) / 2;
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midC = (col1 + col2) / 2;
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break;
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case 1: // last end point
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row2 = newY;
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col2 = newX;
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midR = (row1 + row2) / 2;
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midC = (col1 + col2) / 2;
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break;
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case 2: // midpoint
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lenR = row1 - midR;
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lenC = col1 - midC;
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midR = newY;
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midC = newX;
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row1 = midR + lenR;
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col1 = midC + lenC;
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row2 = midR - lenR;
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col2 = midC - lenC;
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break;
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}
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updateArrowHandle();
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}
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/// <summary> Auxiliary method </summary>
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private void updateArrowHandle()
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{
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double length,dr,dc, halfHW;
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double rrow1, ccol1,rowP1, colP1, rowP2, colP2;
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double headLength = 15;
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double headWidth = 15;
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arrowHandleXLD.Dispose();
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arrowHandleXLD.GenEmptyObj();
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rrow1 = row1 + (row2 - row1) * 0.8;
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ccol1 = col1 + (col2 - col1) * 0.8;
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length = HMisc.DistancePp(rrow1, ccol1, row2, col2);
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if (length == 0)
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length = -1;
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dr = (row2 - rrow1) / length;
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dc = (col2 - ccol1) / length;
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halfHW = headWidth / 2.0;
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rowP1 = rrow1 + (length - headLength) * dr + halfHW * dc;
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rowP2 = rrow1 + (length - headLength) * dr - halfHW * dc;
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colP1 = ccol1 + (length - headLength) * dc - halfHW * dr;
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colP2 = ccol1 + (length - headLength) * dc + halfHW * dr;
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if (length == -1)
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arrowHandleXLD.GenContourPolygonXld(rrow1, ccol1);
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else
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arrowHandleXLD.GenContourPolygonXld(new HTuple(new double[] { rrow1, row2, rowP1, row2, rowP2, row2 }),
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new HTuple(new double[] { ccol1, col2, colP1, col2, colP2, col2 }));
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}
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}//end of class
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}//end of namespace
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