Parameters
- xP
- The point's X-coordinate
- yP
- The point's y-coordinate
- x1
- The first triangle vertex's X-coordinate
- y1
- The first triangle vertex's y-coordinate
- x2
- The second triangle vertex's X-coordinate
- y2
- The second triangle vertex's y-coordinate
- x3
- The third triangle vertex's X-coordinate
- y3
- The third triangle vertex's y-coordinate
Return Value
Returns true if the point is inside the triangle.