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<p> <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/mstkla.md#UTILITIES:) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/GeomVertex.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/example.md)</p>
<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/construction14.gif" />“169” “131”</p>
<hr />
<hr />
<p>   <strong>UTILITIES:</strong></p>
<hr />
<p> </p>
<p><em>void</em> <strong>ReportError</strong>(<em>char</em>
<em>modulename, *char</em>
<em>message, *ErrType</em>
severity);</p>
<p>Report an error message. The severity may be specified as</p>
<p><strong>MESSG</strong>: Print a message to the screen</p>
<p><strong>WARNING</strong>: Print message with additional attention grabbing text</p>
<p><strong>ERROR</strong>: Print message with additional attention grabbing text</p>
<p><strong>FATAL</strong>: Print attention grabbing message and exit.</p>
<p> </p>
<p> </p>
<hr />
<hr />
<p> <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/new1.gif" />“31” “12” <strong>VECTOR FUNCTIONS:</strong></p>
<hr />
<p><em>void</em> <strong>vdiff</strong>(<em>double</em>
<em>a, *double</em>
<em>b, *double</em>
*a_minus_b);</p>
<hr />
<p><em>void</em> <strong>vsum</strong>(<em>double</em>
<em>a, *double</em>
<em>b, *double</em>
*a_plus_b);</p>
<hr />
<p><em>double</em> <strong>vmag2</strong>(<em>double</em>
*v);</p>
<hr />
<p><em>double</em> <strong>vmag</strong>(<em>double</em>
*v);</p>
<hr />
<p><em>void</em> <strong>vcross</strong>(<em>double</em>
<em>a, *double</em>
<em>b, *double</em>
*a_cross_b);</p>
<hr />
<p><em>double</em> <strong>vdot</strong>(<em>double</em>
<em>a, *double</em>
*b);</p>
<hr />
<p><em>void</em> <strong>vnorm</strong>(<em>double</em>
<em>a, *double</em>
*unita);</p>
<hr />
<hr />
<p>  <strong> <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/new1.gif" />“31” “12”REAL NUMBER
COMPARISON FUNCTIONS:</strong></p>
<hr />
<p> </p>
<p><em>int</em> <strong>REAL_le</strong>(<em>double</em> a, <em>double</em> b);</p>
<hr />
<p><em>int</em> <strong>REAL_ge</strong>(<em>double</em> a, <em>double</em> b);</p>
<hr />
<p><em>int</em> <strong>REAL_eq</strong>(<em>double</em> a, <em>double</em> b);</p>
<hr />
<p> </p>
<hr />
<hr />
<p> <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/new1.gif" />“31” “12” <strong>COMP GEOM
FUNCTIONS:</strong></p>
<hr />
<p><em>int</em> <strong>pntInTriangle2</strong>(<em>double</em>
<em>pnt, *double</em> (
<em>tri)[3], *double</em>
tol, <em>int</em> flag, <em>int</em>
<em>mtype, *int</em>
*locID);</p>
<p> </p>
<p>Check if a point that is guaranteed to be in the plane of a triangle is
inside the triangle itself.</p>
<p>If <strong>flag = 1</strong>, check if point is strictly inside</p>
<p>    <strong>flag = 0</strong>, check if point is inside or on the boundary within a
real tolerance ‘tol’</p>
<p>Return <strong>value =  1 (inside), 0 (outside), -1 (on boundary)</strong></p>
<p>If point is on the boundary, <strong>mtype</strong> indicates type of entity it is
on</p>
<p><strong>locID</strong> indicates the local ID number of the vertex or edge it is on</p>
<p> </p>
<hr />
<p><em>int</em> <strong>pntInTet</strong>(<em>double</em>
<em>pnt, *double</em> (
<em>tet)[3], *double</em> tol,
<em>int</em> flag, <em>int</em>
<em>mtype, *int</em>
*locID);</p>
<p>Check if a point is inside a tet</p>
<p>If <strong>flag = 1</strong>, check if point is strictly inside</p>
<p>    <strong>flag = 0</strong>, check if point is inside or on the booundary</p>
<p>              within a real tolerance ‘tol’</p>
<p>Return <strong>value =  1 (inside), 0 (outside), -1 (on boundary)</strong></p>
<p>If point is on the boundary, <strong>mtype</strong> indicates type of entity it is
on</p>
<p><strong>locID</strong> indicates the local ID number of the vertex or edge it is on</p>
<p> </p>
<hr />
<p><em>void</em> <strong>Tri_CircumCen</strong>(<em>double</em> (
<em>xyz)[3], *double</em>
*cen);</p>
<hr />
<p><em>double</em> <strong>Tri_Area</strong>(<em>double</em> (
*xyz)[3]);</p>
<hr />
<p><em>void</em>   <strong>Tri_Normal</strong>(<em>double</em> (
<em>xyz)[3], *double</em>
*normal);</p>
<hr />
<p><em>double</em> <strong>Tet_Volume</strong>(<em>double</em> (
*xyz)[3]);</p>
<hr />
<p><em>void</em>   <strong>Tet_CircumCen</strong>(<em>double</em> (
<em>xyz)[3], *double</em>
*cen);</p>
<hr />
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/mstkla.md#UTILITIES:) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/GeomVertex.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif" />“30”
“30”](http://www.ees.lanl.gov/staff/rao/mstkla/example.md)</p>
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