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A09_2D_vector_class_testing.txt
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A09_2D_vector_class_testing.txt
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# Filename: A09_2D_vector_class_testing.py
# Written by: James D. Miller
from vec2d_jdm import Vec2D
vec_a = Vec2D(1, 2)
vec_b = Vec2D(-3, 0)
print ""
print "vec_a =", vec_a
print "vec_b =", vec_b
print ""
projection_of_a_on_b = vec_a.projection_onto(vec_b)
print "projection of a onto b (a's parallel component) =", projection_of_a_on_b
print ""
print "a's perpendicular component (via projection onto a rotated version of b) =", vec_a.projection_onto( vec_b.rotated(90))
print "a's perpendicular component (by subtraction from the original a) =", vec_a - projection_of_a_on_b
print ""
print "vec_a / 2 =", vec_a / 2.0
print ""
print "vec_a * 2 =", vec_a * 2.0
print ""
print "vec_a + vec_b =", vec_a + vec_b
print ""
print "vec_a - vec_b =", vec_a - vec_b
print ""
print "vec_a.length() =", vec_a.length()
print "vec_a.rotated(15) =", vec_a.rotated(15)
print "vec_a.rotated(15).length() =", vec_a.rotated(15).length()
print "vec_a.rotated(16).length() =", vec_a.rotated(16).length()
print "vec_a.rotated(17).length() =", vec_a.rotated(17).length()
print "vec_a.rotated(25).length() =", vec_a.rotated(25).length()
print ""
print ""
print "Vec2D(0.0,1.0).rotate90 =", Vec2D(0.0,1.0).rotate90()
print ""
print "Vec2D(0.0,1.0).get_angle() = ", Vec2D(0.0,1.0).get_angle()
print ""
print "Vec2D(0.0,1.0).set_angle( 45.0) =", Vec2D(0.0,1.0).set_angle( 45.0)
print ""
print "Vec2D(0.0,1.0).get_angle_between(Vec2D(1.0,0.0)) =", Vec2D(0.0,1.0).get_angle_between(Vec2D(1.0,0.0))
print ""
print "Vec2D(0.0,1.0).get_angle_between(Vec2D(1.0,1.0)) =", Vec2D(0.0,1.0).get_angle_between(Vec2D(1.0,1.0))
print ""
vec_a *= -1.0
print "running vec_a *= -1.0, gives vec_a =", vec_a