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31 lines
1.1 KiB
Python
31 lines
1.1 KiB
Python
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from ..utils.constants import *
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from ..utils.vector3 import vec3
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import numpy as np
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class Surface:
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def __init__(self, center, material, shadow = True):
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self.center = center
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self.material = material
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self.material.assigned_surface = self
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self.shadow = shadow
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self.collider_list = []
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def rotate(self, θ, u):
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u = u.normalize()
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θ = θ/180 *np.pi
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cosθ = np.cos(θ)
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sinθ = np.sqrt(1-cosθ**2) * np.sign(θ)
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#rotation matrix along u axis
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M = np.array([
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[cosθ + u.x*u.x * (1-cosθ), u.x*u.y*(1-cosθ) - u.z*sinθ, u.x*u.z*(1-cosθ) +u.y*sinθ],
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[u.y*u.x*(1-cosθ) + u.z*sinθ, cosθ + u.y**2 * (1-cosθ), u.y*u.z*(1-cosθ) -u.x*sinθ],
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[u.z*u.x*(1-cosθ) -u.y*sinθ, u.z*u.y*(1-cosθ) + u.x*sinθ, cosθ + u.z*u.z*(1-cosθ)]
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])
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for c in self.collider_list:
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c.rotate(M, self.center)
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