diff options
1 files changed, 42 insertions, 0 deletions
| -rw-r--r-- | Sem. 13/ShapeCollection/Triangle.cpp | 42 |
diff --git a/Sem. 13/ShapeCollection/Triangle.cpp b/Sem. 13/ShapeCollection/Triangle.cpp new file mode 100644 index 0000000..350b321 --- /dev/null +++ b/Sem. 13/ShapeCollection/Triangle.cpp @@ -0,0 +1,42 @@ +#include "Triangle.h" +#include <limits> + +Triangle::Triangle(int x1, int y1, int x2, int y2, int x3, int y3) : Shape(3) +{ + setPoint(0, x1, y1); + setPoint(1, x2, y2); + setPoint(2, x3, y3); +} +double Triangle::getArea() const +{ + Shape::point p1 = getPointAtIndex(0); + Shape::point p2 = getPointAtIndex(1); + Shape::point p3 = getPointAtIndex(2); + + return abs(p1.x*p2.y + p2.x*p3.y + p3.x*p1.y - p1.y * p2.x - p2.y*p3.x - p3.y*p1.x) / 2.00; +} +double Triangle::getPer() const +{ + Shape::point p1 = getPointAtIndex(0); + Shape::point p2 = getPointAtIndex(1); + 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(); + +} + +Shape* Triangle::clone() const +{ + Shape* copy = new Triangle(*this); + return copy; +} |