Mercurial > touhou
view pytouhou/utils/matrix.py @ 28:f405b947624d
Massive sprite updating/matrix handling optimizations
author | Thibaut Girka <thib@sitedethib.com> |
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date | Fri, 12 Aug 2011 21:40:26 +0200 |
parents | 787d2eb13c2d |
children | e3ba2fa966f6 |
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#TODO: find/learn to use a proper lib from math import sin, cos class Matrix(object): def __init__(self, data=None): self.data = data or [[0] * 4 for i in xrange(4)] def mult(self, other_matrix): d1 = self.data d2 = other_matrix.data return Matrix([[sum(d1[i][a] * d2[a][j] for a in xrange(4)) for j in xrange(4)] for i in xrange(4)]) def flip(self): self.data[0][:] = (-x for x in self.data[0]) def scale(self, x, y, z): d1 = self.data d1[0][:] = (a * x for a in d1[0]) d1[1][:] = (a * y for a in d1[1]) d1[2][:] = (a * z for a in d1[2]) def translate(self, x, y, z): d1 = self.data a, b, c = (v * m for v, m in zip(d1[3][:3], (x, y, z))) d1[0][:] = (v + a for v in d1[0]) d1[1][:] = (v + b for v in d1[1]) d1[2][:] = (v + c for v in d1[2]) def rotate_x(self, angle): d1 = self.data cos_a = cos(angle) sin_a = sin(angle) a = [cos_a * d1[1][i] - sin_a * d1[2][i] for i in range(4)] b = [sin_a * d1[1][i] + cos_a * d1[2][i] for i in range(4)] d1[1][:] = a d1[2][:] = b def rotate_y(self, angle): #TODO: check d1 = self.data cos_a = cos(angle) sin_a = sin(angle) a = [cos_a * d1[0][i] - sin_a * d1[2][i] for i in range(4)] b = [sin_a * d1[0][i] + cos_a * d1[2][i] for i in range(4)] d1[0][:] = a d1[2][:] = b def rotate_z(self, angle): d1 = self.data cos_a = cos(angle) sin_a = sin(angle) a = [cos_a * d1[0][i] - sin_a * d1[1][i] for i in range(4)] b = [sin_a * d1[0][i] + cos_a * d1[1][i] for i in range(4)] d1[0][:] = a d1[1][:] = b @classmethod def get_translation_matrix(cls, x, y, z): return cls([[1., 0., 0., x], [0., 1., 0., y], [0., 0., 1., z], [0., 0., 0., 1.]]) @classmethod def get_scaling_matrix(cls, x, y, z): return cls([[x, 0., 0., 0.], [0., y, 0., 0.], [0., 0., z, 0.], [0., 0., 0., 1.]]) @classmethod def get_rotation_matrix(cls, angle, axis): """Only handles axis = x, y or z.""" cos_a = cos(angle) sin_a = sin(angle) if axis == 'x': return Matrix([[ 1., 0., 0., 0.], [ 0., cos_a, -sin_a, 0.], [ 0., sin_a, cos_a, 0.], [ 0., 0., 0., 1.]]) elif axis == 'y': return Matrix([[ cos_a, 0., sin_a, 0.], [ 0., 1., 0., 0.], [-sin_a, 0., cos_a, 0.], [ 0., 0., 0., 1.]]) elif axis == 'z': return Matrix([[ cos_a, -sin_a, 0., 0.], [ sin_a, cos_a, 0., 0.], [ 0., 0., 1., 0.], [ 0., 0., 0., 1.]]) else: raise Exception