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Add method for finding the circumcenter and radius three points

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lolabird 2024-02-16 13:47:39 -07:00
commit adee54d54b
1 changed files with 27 additions and 3 deletions
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30
thinkcspy/Chapter-17-Exercises/points.py
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@ -36,15 +36,38 @@ class Point:
# Accounting for points of failure (divide by 0) # Accounting for points of failure (divide by 0)
if dx == 0: if dx == 0:
if dy == 0: if dy == 0:
return "Cannot calculate slope of a single point." return "Error: Cannot calculate slope of a single point."
else: else:
return "Cannot calculate slope of a vertical line." return "Error: Cannot calculate slope of a vertical line."
m = dy / dx m = dy / dx
b = self.y - m*self.x b = self.y - m*self.x
return (m, b) return (m, b)
def getMid(self, pnt):
midX = (self.x + pnt.getX()) / 2
midY = (self.y + pnt.getY()) / 2
return (midX, midY)
def findCenterRadius(self, pnt1, pnt2):
# Find a way to figure out if all three points are on the same line probably
# Comparing slopeIntercept return values
m1, b1 = self.slopeIntercept(pnt1)
m2, b2 = self.slopeIntercept(pnt2)
if m1 == m2 and b1 == b2:
return "Error: Points are on the same line."
mid1X, mid1Y = self.getMid(pnt1)
mid2X, mid2Y = self.getMid(pnt2)
center = Point(mid1X, mid1Y).getMid(Point(mid2X, mid2Y))
r = self.distanceFromPoint(Point(center[0], center[1]))
return "Circumcenter: {}; Radius: {}".format(center, r)
def move(self, pnt): def move(self, pnt):
self.x += pnt.getX() self.x += pnt.getX()
self.y += pnt.getY() self.y += pnt.getY()
@ -56,4 +79,5 @@ class Point:
p = Point(7, 6) p = Point(7, 6)
q = Point(10, 3) q = Point(10, 3)
print(p.move(q)) z = Point(8, 5)
print(p.findCenterRadius(q, z))