The concentrative part of field value can't be judged exactly on the static picture of classical volume rendering. In order to remedy this kind of shortage

this paper presents a quick volume rendering method

for the finite element data field of dam seismic response

choices the slicing direction relying on the element surface which normal line has the smallest included angle with the view direction

slices elements to many quadrilaterals

blends the colors of these quadrilaterals by using OpenGL blending technology

and then superimposes all elements one by one. This method accelerates the speed of volume rendering

thus

we can observe dynamic pictures of volume rendering and analyzes the concentrative part of field value clearly.