SpaceRun/transforms.py at master · devil-cyber/SpaceRun · GitHub

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def transform(self, x, y):
    # return self.transform_2D(x, y)
    return self.transform_perspective(x, y)


def transform_2D(self, x, y):
    return int(x), int(y)


def transform_perspective(self, x, y):
    lin_y = y * self.perspective_point_y / self.height
    if lin_y > self.perspective_point_y:
        lin_y = self.perspective_point_y

    diff_x = x - self.perspective_point_x
    diff_y = self.perspective_point_y - lin_y
    factor_y = diff_y / self.perspective_point_y  # 1 when diff_y == self.perspective_point_y / 0 when diff_y = 0
    factor_y = pow(factor_y, 4)

    tr_x = self.perspective_point_x + diff_x * factor_y
    tr_y = self.perspective_point_y - factor_y * self.perspective_point_y

    return int(tr_x), int(tr_y)