Page 178 - Basics of MATLAB and Beyond

fac2=[126
163
146
1 6 5];

The resulting display is now rendered correctly no matter what the view-
ing angle:

clf 1
patch(’vertices’,vert2,...
z 0
’faces’,fac2,’facecolor’,’y’)
view(3),grid,xyz −1 1
1
0 0.5
y −1 0 x
Patch Colouring
Simple solid colouring of patches can be specified using the named
colours, as we did for the yellow (’y’) patches of the previous section.
You can also use arbitrary RGB colours. Here is a patch that should be
orange on your display:
xt = [0 1 .5];
yt=[001]; 1
clf 0.5
h = patch(xt,yt,[1 .4 0])
0
0 0.5 1
Patches have a number of properties that control how they are coloured.
By using coloured patches, you can make pictures of objects that are
colour-coded to some quantity you want to display. For example, the
stress of a bent bar could be presented as the colour of the bar. Here is a
list of patch colour properties and a description of what they do (taken
from the Using MATLAB Graphics manual).

CData Specify single, per face, or per vertex colours in conjunction with
x, y, and z data.
CDataMapping Specifies whether colour data is scaled or used directly
as indices into the Figure colormap.
FaceVertexCData Specify single, per face, or per vertex colours in con-
junction with faces and vertices data.
EdgeColor Edges can be invisible, a single colour, a flat colour deter-
mined by vertex colours, or interpolated colours determined by
vertex colours.

FaceColor Faces can be invisible, a single colour, a flat colour deter-
mined by vertex colours, or interpolated colours determined by
vertex colours.

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