removed unused line_intersect()

2020/sketch_2020_02_04a/sketch_2020_02_04a.pyde

@@ -121,24 +121,3 @@ def triangle_area(t):
     return (t[1][0] * (t[2][1] - t[0][1]) +
             t[2][0] * (t[0][1] - t[1][1]) +
             t[0][0] * (t[1][1] - t[2][1]))
-    
-def line_instersect(p1, p2, p3, p4):     
-    """
-    code adapted from Bernardo Fontes 
-    https://github.com/berinhard/sketches/
-    """
-    x1, y1 = p1
-    x2, y2 = p2
-    x3, y3 = p3
-    x4, y4 = p4
-    try:
-        uA = ((x4-x3)*(y1-y3) - (y4-y3)*(x1-x3)) / ((y4-y3)*(x2-x1) - (x4-x3)*(y2-y1));
-        uB = ((x2-x1)*(y1-y3) - (y2-y1)*(x1-x3)) / ((y4-y3)*(x2-x1) - (x4-x3)*(y2-y1));
-    except ZeroDivisionError:
-        return
-    if not(0 <= uA <= 1 and 0 <= uB <= 1):
-        return
-    x = line_a.p1.x + uA * (line_a.p2.x - line_a.p1.x)
-    y = line_a.p1.y + uA * (line_a.p2.y - line_a.p1.y)
-        
-    return PVector(x, y)