geometryFromEdges
Create 2-D geometry from decomposed geometry matrix
Description
Examples
Create a decomposed solid geometry model representing a rectangle and include it in a PDE model.
Create a default scalar PDE model.
model = createpde;
Define a geometry representing a rectangle.
R1 = [3,4,-1,1,1,-1,0.5,0.5,-0.75,-0.75]';
Decompose the geometry into minimal regions.
g = decsg(R1);
Create the geometry from the decomposed geometry matrix.
geometryFromEdges(model,g);
Plot the geometry.
pdegplot(model,EdgeLabels="on") axis equal xlim([-1.1,1.1]) ylim([-0.9,0.6])
Create a decomposed solid geometry model and include it in a PDE model.
Create a default scalar PDE model.
model = createpde;
Define a circle in a rectangle, place these in one matrix, and create a set formula that subtracts the circle from the rectangle.
R1 = [3,4,-1,1,1,-1,0.5,0.5,-0.75,-0.75]';
C1 = [1,0.5,-0.25,0.25]';
C1 = [C1;zeros(length(R1) - length(C1),1)];
gm = [R1,C1];
sf = 'R1-C1';Create the geometry.
ns = char('R1','C1'); ns = ns'; g = decsg(gm,sf,ns);
Include the geometry in the model and plot it.
geometryFromEdges(model,g); pdegplot(model,EdgeLabels="on") axis equal xlim([-1.1,1.1])
The toolbox provides the several geometry functions. Specify them by using the following function handles.
model = createpde; g = geometryFromEdges(model,@cardg); pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@circleg);
pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@cirsg);
pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@crackg);
pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@lshapeg);
pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@scatterg);
pdegplot(model)
clear model
model = createpde;
g = geometryFromEdges(model,@squareg);
pdegplot(model)
