__init__.py 文件源码

def get_y(self, x):
        """
        Calculates the y value (in normal cartesian y-direction (positive values on up axis)) for a given x-value.

        :param int x: the x-value (x=0 for left edge of tile x=tilewidth for right edge of tile)
        :return: the calculated y-value
        :rtype: int
        """
        # y = mx + b
        if self.slope is None or self.offset is None:
            return 0
        return self.slope * min(x, self.max_x) + self.offset * self.rect.height