Is color overlapping possible with Mathematica?
- To: mathgroup at smc.vnet.net
- Subject: [mg28917] Is color overlapping possible with Mathematica?
- From: liu at vtaix.cc.vt.edu (Xiangdong Liu)
- Date: Fri, 18 May 2001 01:13:21 -0400 (EDT)
- Organization: Virginia Tech
- Sender: owner-wri-mathgroup at wolfram.com
Hello!
I wonder if it's possible to use Mathematica to draw to
overlapping shapes each filled with a different color
and the color in the overlapping region being the
composition of the two colors but not the color of the
shape on top. For example, I could do
In[1]:= Show[Graphics[{RGBColor[1.0, 0.0, 0.0],
Polygon[{{0, 0}, {0, 2}, {2, 2}, {2, 0}}]}]];
In[2]:= Show[Graphics[{RGBColor[0.0, 0.0, 1.0],
Polygon[{{1, 1}, {1, 3}, {3, 3}, {3, 1}}]}]];
In[3]:= Show[Out[1],Out[2]];
But the overlapping square area would have the color of Out[2],
RGBColor[0.0, 0.0, 1.0].
What I am looking for is to plot a shape transparent rather than
opaque.
Thank you all!
Xiangdong Liu