1 files changed, 126 insertions, 0 deletions
diff --git a/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIPolygon.java b/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIPolygon.java
new file mode 100644
index 0000000..a54a297
--- /dev/null
+++ b/WPIJavaCV/src/edu/wpi/first/wpijavacv/WPIPolygon.java
@@ -0,0 +1,126 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package edu.wpi.first.wpijavacv;
+
+import static com.googlecode.javacv.cpp.opencv_imgproc.*;
+import static com.googlecode.javacv.cpp.opencv_core.*;
+
+/**
+ * A class that represents a polygon, can be obtained from approxPolygon()
+ * in WpiContour
+ * @author Greg Granito
+ */
+public class WPIPolygon extends WPIDisposable {
+
+    CvSeq polygon;
+    CvRect boundingRect;
+
+    WPIPolygon(CvSeq data) {
+        polygon = data;
+    }
+
+    CvSeq getCVSeq() {
+        return polygon;
+    }
+
+    /**
+     *
+     * @return an array of WpiPoints of the vertices of the polygon
+     */
+    public WPIPoint[] getPoints() {
+        CvPoint points = new CvPoint(getNumVertices());
+        WPIPoint[] wpiPoints= new WPIPoint[getNumVertices()];
+        cvCvtSeqToArray(polygon, points.position(0), CV_WHOLE_SEQ);
+        for (int j = 0; j < getNumVertices(); j++) {
+            
+            wpiPoints[j] = new WPIPoint(points.position(j).x(), points.position(j).y());
+            
+        }
+        return wpiPoints;
+    }
+
+    /**
+     *
+     * @return the width of the bounding rectangle of the polygon
+     */
+    public int getWidth() {
+        if (boundingRect == null) {
+            boundingRect = cvBoundingRect(polygon, 0);
+        }
+        return boundingRect.width();
+    }
+
+    /**
+     *
+     * @return the height of the bounding rectangle of the polygon
+     */
+    public int getHeight() {
+        if (boundingRect == null) {
+            boundingRect = cvBoundingRect(polygon, 0);
+        }
+        return boundingRect.height();
+    }
+
+    /**
+     *
+     * @return the x coord of the top left corner of the bounding
+     * rectangle of the polygon
+     */
+    public int getX() {
+        if (boundingRect == null) {
+            boundingRect = cvBoundingRect(polygon, 0);
+        }
+        return boundingRect.x();
+    }
+
+    /**
+     *
+     * @return the y coord of the top left corner of the bounding
+     * rectangle of the polygon
+     */
+    public int getY() {
+        if (boundingRect == null) {
+            boundingRect = cvBoundingRect(polygon, 0);
+        }
+        return boundingRect.y();
+    }
+
+    /**
+     *
+     * @return the number of vertices in the polygon
+     */
+    public int getNumVertices() {
+        return polygon.total();
+
+    }
+
+    /**
+     *
+     * @return whether or not the polygon is convex
+     */
+    public boolean isConvex() {
+        return cvCheckContourConvexity(polygon) == 0 ? false : true;
+    }
+
+    /**
+     *
+     * @return the area in pixels of the polygon
+     */
+    public int getArea() {
+        return Math.abs((int) cvContourArea(polygon, CV_WHOLE_SEQ, -1));
+    }
+
+    /**
+     *
+     * @return the perimeter in pixels of the polygon
+     */
+    public int getPerimeter() {
+        return (int) cvArcLength(polygon, CV_WHOLE_SEQ, -1);
+    }
+
+    public void disposed() {
+        polygon.deallocate();
+    }
+}