fix problem with NULL pointers that show up with cfast cases

Source/shared/readsmvfile.c

@@ -912,8 +912,7 @@ void InitMesh(meshdata *meshi){
   memset(meshi->currentsurf, 0, sizeof(isosurface));
   NewMemory((void **)&meshi->currentsurf2, sizeof(isosurface));
   memset(meshi->currentsurf2, 0, sizeof(isosurface));
-  NewMemory((void **)&meshi->box_clipinfo, sizeof(clipdata));
-  memset(meshi->box_clipinfo, 0, sizeof(clipdata));
+  meshi->box_clipinfo = NULL;
   NewMemory((void **)&meshi->gsliceinfo, sizeof(meshplanedata));
   memset(meshi->gsliceinfo, 0, sizeof(meshplanedata));
   NewMemory((void **)&meshi->volrenderinfo, sizeof(volrenderdata));
@@ -7574,6 +7573,10 @@ int ReadSMV_Parse(smv_case *scase, bufferstreamdata *stream){
       meshi->xyz_bar0[ZZZ]=scase->zbar0;
       meshi->xyz_bar[ZZZ] =scase->zbar;
       meshi->zcen_smv =(scase->zbar+scase->zbar0)/2.0;
+      if(meshi->box_clipinfo == NULL){
+        NewMemory(( void ** )&meshi->box_clipinfo, sizeof(clipdata));
+        memset(meshi->box_clipinfo, 0, sizeof(clipdata));
+      }
       InitBoxClipInfo(meshi->box_clipinfo,scase->xbar0,scase->xbar,scase->ybar0,scase->ybar,scase->zbar0,scase->zbar);
       if(scase->ntrnx==0){
         int nn;

Source/smokeview/glui_smoke.cpp

@@ -1375,8 +1375,12 @@ extern "C" void GLUISmoke3dCB(int var){
    case SMOKE_EXTINCT:
      global_scase.update_smoke_alphas = 1;
      glui_mass_extinct = MAX(glui_mass_extinct, 0.0);
-     SPINNER_mass_extinct->set_float_val(glui_mass_extinct);
-     SPINNER_mass_extinct2->set_float_val(glui_mass_extinct);
+     if(SPINNER_mass_extinct != NULL){
+       SPINNER_mass_extinct->set_float_val(glui_mass_extinct);
+     }
+     if(SPINNER_mass_extinct2 != NULL){
+       SPINNER_mass_extinct2->set_float_val(glui_mass_extinct);
+     }
      break;
 #ifdef pp_GPU
   case SMOKE_RTHICK:

Source/smokeview/readsmv.c

@@ -1137,6 +1137,24 @@ void UpdateMeshCoords(void){
 
   if(current_mesh == NULL)current_mesh = global_scase.meshescoll.meshinfo;
   if(global_scase.setPDIM==0&&current_mesh!=NULL){
+    float *xplt_smv, *yplt_smv, *zplt_smv;
+
+    xplt_smv = current_mesh->xplt_smv;
+    if(xplt_smv == NULL){
+      NewMemory(( void ** )&xplt_smv, sizeof(float) * (current_mesh->ibar + 1));
+      current_mesh->xplt_smv = xplt_smv;
+    }
+    yplt_smv = current_mesh->yplt_smv;
+    if(yplt_smv == NULL){
+      NewMemory(( void ** )&yplt_smv, sizeof(float) * (current_mesh->jbar + 1));
+      current_mesh->yplt_smv = yplt_smv;
+    }
+    zplt_smv = current_mesh->zplt_smv;
+    if(zplt_smv == NULL){
+      NewMemory(( void ** )&zplt_smv, sizeof(float) * (current_mesh->kbar + 1));
+      current_mesh->zplt_smv = zplt_smv;
+    }
+
     for(nn=0;nn<=current_mesh->ibar;nn++){
       current_mesh->xplt_smv[nn]=global_scase.xbar0+(float)nn*(global_scase.xbar-global_scase.xbar0)/(float)current_mesh->ibar;
     }

Source/smokeview/smokeviewvars.h

@@ -1931,6 +1931,8 @@ SVEXTERN char script_filename[1024];
 SVEXTERN int SVDECL(highlight_block,-1), SVDECL(highlight_mesh,0), SVDECL(outline_mode,SCENE_OUTLINE_SCENE);
 SVEXTERN int SVDECL(updategetobstlabels,1);
 
+SVEXTERN int SVDECL(update_set_clipplanes, 1);
+
 SVEXTERN int smoke_alpha;
 SVEXTERN int SVDECL(showall_textures,0);
 SVEXTERN int SVDECL(enable_texture_lighting,0);

Source/smokeview/update.c

@@ -2070,6 +2070,24 @@ void UpdateShowScene(void){
     IdleCB();
     update_idle = 0;
   }
+  if(update_set_clipplanes == 1){
+    int i;
+
+    update_set_clipplanes = 0;
+    for(i=0;i<global_scase.meshescoll.nmeshes;i++){
+      meshdata *meshi;
+
+      meshi = global_scase.meshescoll.meshinfo + i;
+      if(meshi->box_clipinfo == NULL){
+        NewMemory(( void ** )&meshi->box_clipinfo, sizeof(clipdata));
+        memset(meshi->box_clipinfo, 0, sizeof(clipdata));
+        InitBoxClipInfo(meshi->box_clipinfo,
+          global_scase.xbar0, global_scase.xbar,
+          global_scase.ybar0, global_scase.ybar,
+          global_scase.zbar0, global_scase.zbar);
+      }
+    }
+  }
   if(update_setmainwindow == 1){
     SetMainWindow();
     update_setmainwindow = 0;