本文整理汇总了Python中vector.Vector.scale方法的典型用法代码示例。如果您正苦于以下问题：Python Vector.scale方法的具体用法？Python Vector.scale怎么用？Python Vector.scale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.scale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: PointMass
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import scale [as 别名]
class PointMass():
def __init__(self, x, y, mass, fixed=False):
self.pos = Vector(x, y)
self.mass = mass
self.colour = constants.BLACK
self.velocity = Vector()
self.force = Vector()
self.angular_velocity = 0
self.fixed = fixed
self.selected = False
def add_gravity(self):
self.force.y += constants.GRAVITY * self.mass
def add_force(self, force_vector):
# print(force_vector)
self.force = self.force.add(force_vector)
def accelerate(self):
self.velocity = self.velocity.add(self.force.scale(1 / self.mass))
def move(self):
self.pos = self.pos.add(self.velocity)
def step(self):
if not self.fixed:
# Forces
self.add_gravity()
# Velocity
self.accelerate()
self.move()
self.force.reset()
m_pos = pygame.mouse.get_pos()
pressed = pygame.mouse.get_pressed()
if pressed[0]:
if (m_pos[0] - self.pos.x)**2 + (m_pos[1] - self.pos.y)**2 < (self.mass*30)**2:
self.selected = True
if not pressed[0]:
self.selected = False
if self.selected:
self.add_force(Vector(m_pos[0], m_pos[1]).subtract(self.pos).normalize().scale(1))
def draw(self, screen):
m_pos = pygame.mouse.get_pos()
if (m_pos[0] - self.pos.x)**2 + (m_pos[1] - self.pos.y)**2 < (self.mass*30)**2:
pygame.draw.circle(screen, self.colour, (int(round(self.pos.x)), int(round(self.pos.y))), int(round(self.mass*10)))
# Force and velocity vectors
# Force
# pygame.draw.line(screen, constants.RED, (round(self.pos.x), round(self.pos.y)), (self.pos.x + self.force.x, self.pos.y + self.force.y))示例2: __init__
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import scale [as 别名]
class Particle:
def __init__(self, pos, mass):
self.position = pos
self.mass = mass
self.velocity = Vector(0, 0)
def forceFrom(self, p):
distance = p.position.subtract(self.position)
magnitude = self.mass * p.mass / distance.dot(distance)
return distance.normalize().scale(magnitude)
def applyForce(self, force, timeDelta):
self.velocity.addInPlace(force.scale(timeDelta / abs(self.mass)))
self.position.addInPlace(self.velocity.scale(timeDelta))
def __str__(self):
return ("{Particle mass: " + str(self.mass) + " velocity: " +
str(self.velocity) + " position: " + str(self.position) + "}")示例3: cast_rays
# 需要导入模块: from vector import Vector [as 别名]
# 或者: from vector.Vector import scale [as 别名]
def cast_rays(self, output):
print(output.shape)
v_forward = (self.look_at - self.position).normalize()
magnitude_right = (self.look_at - self.position).magnitude() * math.tan(self.angle / 2)
magnitude_up = magnitude_right * (float(self.height) / float(self.width))
v_up = Vector(0.0, 0.0, 1.0).scale(magnitude_up)
v_right = v_forward.cross(v_up).normalize().scale(magnitude_right);
top_left = (self.look_at + v_up - v_right) - self.position
sweep_down = v_up.scale(-2)
sweep_right = v_right.scale(2)
total_pixels = float(self.height * self.width);
pixel_count = 0;
for y in range(self.height):
fraction_down = y / float(self.height - 1)
for x in range(self.width):
fraction_right = x / float(self.width - 1)
ray = Ray(self.position, top_left + sweep_down.scale(fraction_down) + sweep_right.scale(fraction_right))
color = self.trace_ray(ray, max_depth)
output[y,x,0] = color.r
output[y,x,1] = color.g
output[y,x,2] = color.b
output[y,x,3] = color.a
if (pixel_count > 0 and pixel_count % 10000 == 0):
self.progress_token.update(pixel_count / total_pixels)
pixel_count += 1
return output