added shapes collection

1 files changed, 12 insertions, 0 deletions

diff --git a/Sem. 12/Example_polymorphism/Triangle.cpp b/Sem. 12/Example_polymorphism/Triangle.cpp
index 7de831c..4463ccc 100644
--- a/Sem. 12/Example_polymorphism/Triangle.cpp
+++ b/Sem. 12/Example_polymorphism/Triangle.cpp
@@ -1,4 +1,5 @@
 #include "Triangle.h"
+#include <limits>
 
 Triangle::Triangle(int x1, int y1, int x2, int y2, int x3, int y3) : Shape(3)
 {
@@ -21,4 +22,15 @@ double Triangle::getPer() const
 	Shape::point p3 = getPointAtIndex(2);
 
 	return p1.getDist(p2) + p2.getDist(p3) + p3.getDist(p1);
+}
+
+bool Triangle::isPointIn(int x, int y) const
+{
+	Shape::point p(x, y);
+	Triangle t1(getPointAtIndex(0).x, getPointAtIndex(0).y, getPointAtIndex(1).x, getPointAtIndex(1).y, p.x, p.y);
+	Triangle t2(getPointAtIndex(2).x, getPointAtIndex(2).y, getPointAtIndex(1).x, getPointAtIndex(1).y, p.x, p.y);
+	Triangle t3(getPointAtIndex(2).x, getPointAtIndex(2).y, getPointAtIndex(0).x, getPointAtIndex(0).y, p.x, p.y);
+
+	return abs(t1.getArea() + t2.getArea() + t3.getArea() - getArea()) <= std::numeric_limits<double>::epsilon();
+
 }
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