本文整理汇总了Python中vector.Vector.length方法的典型用法代码示例。如果您正苦于以下问题：Python Vector.length方法的具体用法？Python Vector.length怎么用？Python Vector.length使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类vector.Vector的用法示例。
在下文中一共展示了Vector.length方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: Car
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import length [as 别名]
class Car(object):
def __init__(self, position):
self.position = position
self.velocity = Vector(0, 0)
self.alive = True
def update(self, dt, height, acceleration, tangent):
drag = -self.velocity.normalized() if self.velocity.length() > 0 else \
Vector(0, 0)
if height > 0:
acc = tangent * acceleration + tangent * GRAVITY.dot(tangent) \
- drag
else:
acc = GRAVITY - drag
velocity_old = self.velocity
self.velocity = self.velocity + acc * dt
# Check death.
impulse = (velocity_old - self.velocity).length()
print "impulse:", impulse
if impulse > 150:
print "DIE!"
self.alive = False
self.position = self.position + self.velocity * dt示例2: Vector
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import length [as 别名]
class MovingBall :
r = 25
#velocity vector
speedlimit = Vector(10000.0, 10000.0)
color = pygame.color.Color('darkgreen')
def __init__ (self, x, y, r, color, xv, yv):
self.position = Vector(float(x), float(y))
self.r = r
self.color = color
self.v = Vector(float(xv),float(yv))
def stop_v (self):
""" Reset the velocity to 0 if it gets very close. """
if self.v.length() < 3:
self.v = Vector (0,0)
def draw (self, window):
pygame.draw.circle(window, self.color, (int(self.position.x),int(self.position.y)), self.r)示例3: getValue
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import length [as 别名]
def getValue(self, x, y):
# project point (x, y) onto vector
v1 = Vector(x - self.centerX, y - self.centerY)
# vector
p = v1.project(self.direction);
# adjust so the point is correct
p.x += self.centerX
p.y += self.centerY
# get the vector from the point to (x, y)
d = Vector(x - p.x, y - p.y)
l = d.length()
# normal of current vector
n = Vector(self.direction.y, -self.direction.x)
# adjust for sign on each side of the vector
p = v1.dot(n)
sign = 1.0
if p > 0:
sign = -1.0
#print self.waveLength
#print math.sin(self.theta + sign * l / self.waveLength)
return math.sin(self.theta + sign * l / self.waveLength);