Refactoring: Make GeoUtils reusable

code/PostProcessing/FindDegenerates.cpp

@@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "ProcessHelper.h"
 #include "FindDegenerates.h"
+#include "Geometry/GeometryUtils.h"
 
 #include <assimp/Exceptional.h>
 
@@ -63,10 +64,6 @@ FindDegeneratesProcess::FindDegeneratesProcess() :
     // empty
 }
 
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-FindDegeneratesProcess::~FindDegeneratesProcess() = default;
-
 // ------------------------------------------------------------------------------------------------
 // Returns whether the processing step is present in the given flag field.
 bool FindDegeneratesProcess::IsActive( unsigned int pFlags) const {
@@ -132,37 +129,6 @@ static void updateSceneGraph(aiNode* pNode, const std::unordered_map<unsigned in
     }
 }
 
-static ai_real heron( ai_real a, ai_real b, ai_real c ) {
-    ai_real s = (a + b + c) / 2;
-    ai_real area = pow((s * ( s - a ) * ( s - b ) * ( s - c ) ), (ai_real)0.5 );
-    return area;
-}
-
-static ai_real distance3D( const aiVector3D &vA, aiVector3D &vB ) {
-    const ai_real lx = ( vB.x - vA.x );
-    const ai_real ly = ( vB.y - vA.y );
-    const ai_real lz = ( vB.z - vA.z );
-    ai_real a = lx*lx + ly*ly + lz*lz;
-    ai_real d = pow( a, (ai_real)0.5 );
-
-    return d;
-}
-
-static ai_real calculateAreaOfTriangle( const aiFace& face, aiMesh* mesh ) {
-    ai_real area = 0;
-
-    aiVector3D vA( mesh->mVertices[ face.mIndices[ 0 ] ] );
-    aiVector3D vB( mesh->mVertices[ face.mIndices[ 1 ] ] );
-    aiVector3D vC( mesh->mVertices[ face.mIndices[ 2 ] ] );
-
-    ai_real a( distance3D( vA, vB ) );
-    ai_real b( distance3D( vB, vC ) );
-    ai_real c( distance3D( vC, vA ) );
-    area = heron( a, b, c );
-
-    return area;
-}
-
 // ------------------------------------------------------------------------------------------------
 // Executes the post processing step on the given imported mesh
 bool FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh) {
@@ -218,7 +184,7 @@ bool FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh) {
 
             if ( mConfigCheckAreaOfTriangle ) {
                 if ( face.mNumIndices == 3 ) {
-                    ai_real area = calculateAreaOfTriangle( face, mesh );
+                    ai_real area = GeometryUtils::calculateAreaOfTriangle( face, mesh );
                     if (area < ai_epsilon) {
                         if ( mConfigRemoveDegenerates ) {
                             remove_me[ a ] = true;