This directory contains the scripts to generate velocity-aware volume meshes with mountain topography.
First, the scripts call Gmsh to generate an initial mesh.
Next, we iterate over the following steps multiple times:
* The mesh is parsed by EDGE-V which generates target edge lengths based on vs.
* Gmsh reads the target lengths and generates a mesh satisfying the specified constraints; no remeshing of the surface mesh is performed.
In a final iteration EDGE-V also increases the mesh-resolution if a jump in vs is detected.
This input is once again parsed by Gmsh (also remeshing the surface mesh) and then handed over to EDGE-V for velocity and LTS annotations as well as partitioning.
EDGE-V used MOAB with the patch ``../moab_int32.patch`` applied.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@section DESCRIPTION
EDGE-V configuration for mesh refinement of the La Habra benchmark.
// Decription, following https://scec.usc.edu/scecpedia/HighF_2018:
//
// 1. Set Min Vs=500 m/s
// 2. If Vs was lower than 500 m/s and adjusted, then adjust Vp with original Vp/Vs ratio (so that we don’t have the automatic Vs/Vp of 3). We may want to set a minimum value of Vp (Rob to check)
// 3. Then set Max Vp/Vs= 3, if lower Vp to maintain the max of 3 ratio
// limit vs to 500 m/s
if( vs < 500 ) {
// derive vp/vs ratio
var sca := vp / vs;
// adjust velocities
vs := 500;
vp := 500*sca;
};
// limit maximum vp/vs ratio to 3
var sca := vp / vs;
if( sca > 3 ) {
vp := 3*vs;
};
// limit minimum vp/vs ratio to sqrt(2) (lower means negative lambda)
if( sca < 1.415){
vp:=1.415*vs;
};
]]>
</normalization_rule>
<lower_to_surface>true</lower_to_surface>
</ucvm>
</velocity_model>
<refinement>
<expression>
<![CDATA[
frequency := 1.25;
// use five edges per wavelength in 25km radius
if( sqrt(x*x + y*y) < 25000 ) {
edges_per_wave_length := 5;
}
// decrease linearly from 25km - 40km
else if( sqrt(x*x + y*y) < 40000 ) {
var ratio := (sqrt(x*x + y*y)-25000) / (40000 - 25000);
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@section DESCRIPTION
EDGE-V configuration for mesh refinement of the La Habra benchmark.
// Decription, following https://scec.usc.edu/scecpedia/HighF_2018:
//
// 1. Set Min Vs=500 m/s
// 2. If Vs was lower than 500 m/s and adjusted, then adjust Vp with original Vp/Vs ratio (so that we don’t have the automatic Vs/Vp of 3). We may want to set a minimum value of Vp (Rob to check)
// 3. Then set Max Vp/Vs= 3, if lower Vp to maintain the max of 3 ratio
// limit vs to 500 m/s
if( vs < 500 ) {
// derive vp/vs ratio
var sca := vp / vs;
// adjust velocities
vs := 500;
vp := 500*sca;
};
// limit maximum vp/vs ratio to 3
var sca := vp / vs;
if( sca > 3 ) {
vp := 3*vs;
};
// limit minimum vp/vs ratio to sqrt(2) (lower means negative lambda)
if( sca < 1.415){
vp:=1.415*vs;
};
]]>
</normalization_rule>
<lower_to_surface>true</lower_to_surface>
</ucvm>
</velocity_model>
<refinement>
<expression>
<
