__init__.py 文件源码

def draw(self, *args):
        super(MeshLinePlot, self).draw(*args)
        points = self.points
        mesh = self._mesh
        vert = mesh.vertices
        ind = mesh.indices
        params = self._params
        funcx = log10 if params['xlog'] else lambda x: x
        funcy = log10 if params['ylog'] else lambda x: x
        xmin = funcx(params['xmin'])
        ymin = funcy(params['ymin'])
        diff = len(points) - len(vert) // 4
        size = params['size']
        ratiox = (size[2] - size[0]) / float(funcx(params['xmax']) - xmin)
        ratioy = (size[3] - size[1]) / float(funcy(params['ymax']) - ymin)
        if diff < 0:
            del vert[4 * len(points):]
            del ind[len(points):]
        elif diff > 0:
            ind.extend(range(len(ind), len(ind) + diff))
            vert.extend([0] * (diff * 4))
        for k in range(len(points)):
            vert[k * 4] = (funcx(points[k][0]) - xmin) * ratiox + size[0]
            vert[k * 4 + 1] = (funcy(points[k][1]) - ymin) * ratioy + size[1]
        mesh.vertices = vert