Can Mathematica draw overlapping shapes with blended color?
- To: mathgroup at smc.vnet.net
- Subject: [mg28921] Can Mathematica draw overlapping shapes with blended color?
- From: liu at vtaix.cc.vt.edu (Xiangdong Liu)
- Date: Fri, 18 May 2001 01:13:28 -0400 (EDT)
- Organization: Virginia Tech
- Sender: owner-wri-mathgroup at wolfram.com
Hello (again)!
I posted a similar message earlier, but it didn't seem to make
it to the newsgroups.
I wonder if I can draw two overlapping shapes each filled with
a different color and make the overlapping region to have the
blending color of those of the two shapes. In other words,
can I fill shapes with transparent colors (ink) rather than
opaque colors (ink)?
For example, I could do
In[1]:= Show[Graphics[{RGBColor[0.5, 0.0, 0.0],
Polygon[{{0,0}, {0,2}, {2,2}, {2,0}}]}]];
In[2]:= Show[Graphics[{RGBColor[0.0, 0.0, 0.5],
Polygon[{{1,1}, {1,3}, {3,3}, {3,1}}]}]];
In[3]:= Show[Out[1], Out[2]];
But the color in the overlapping square area is
RGBColor[0.0, 0.0, 0.5].
Thank you all!
Xiangdong Liu