+ safe height gcode parameter

src/confscreen.cpp

@@ -161,6 +161,11 @@ void TextWindow::ScreenChangeGCodeParameter(int link, uint32_t v) {
             buf += SS.MmToString(SS.gCode.depth, true);
             break;
 
+        case 'h':
+            SS.TW.edit.meaning = Edit::G_CODE_SAFE_HEIGHT;
+            buf += SS.MmToString(SS.gCode.safeHeight, true);
+            break;
+
         case 's':
             SS.TW.edit.meaning = Edit::G_CODE_PASSES;
             buf += std::to_string(SS.gCode.passes);
@@ -492,6 +497,11 @@ bool TextWindow::EditControlDoneForConfiguration(const std::string &s) {
             if(e) SS.gCode.depth = (float)SS.ExprToMm(e);
             break;
         }
+        case Edit::G_CODE_SAFE_HEIGHT: {
+            Expr *e = Expr::From(s, /*popUpError=*/true);
+            if(e) SS.gCode.safeHeight = (float)SS.ExprToMm(e);
+            break;
+        }
         case Edit::G_CODE_PASSES: {
             Expr *e = Expr::From(s, /*popUpError=*/true);
             if(e) SS.gCode.passes = (int)(e->Eval());

src/exportvector.cpp

@@ -1102,7 +1102,7 @@ void SvgFileWriter::StartFile() {
             fprintf(f, "stroke-dasharray:%s;\r\n", patternStr.c_str());
         }
         if(s->filled) {
-            fprintf(f, "fill:#%02x%02x%02x;\r\n", fillRgb.red, fillRgb.green, fillRgb.blue); 
+            fprintf(f, "fill:#%02x%02x%02x;\r\n", fillRgb.red, fillRgb.green, fillRgb.blue);
         }
         else {
             fprintf(f, "fill:none;\r\n");
@@ -1308,9 +1308,9 @@ void GCodeFileWriter::FinishAndCloseFile() {
                         SS.MmToString(pt->p.x).c_str(), SS.MmToString(pt->p.y).c_str(),
                         SS.MmToString(SS.gCode.feed).c_str());
             }
-            // Move up to a clearance plane 5mm above the work.
+            // Move up to a clearance plane above the work.
             fprintf(f, "G00 Z%s\r\n",
-                    SS.MmToString(SS.gCode.depth < 0 ? +5 : -5).c_str());
+                    SS.MmToString(SS.gCode.safeHeight).c_str());
         }
     }
 

src/solvespace.cpp

@@ -105,6 +105,7 @@ void SolveSpaceUI::Init() {
     exportCanvas.dy     = settings->ThawFloat("ExportCanvas_Dy",     5.0);
     // Extra parameters when exporting G code
     gCode.depth         = settings->ThawFloat("GCode_Depth", 10.0);
+    gCode.safeHeight    = settings->ThawFloat("GCode_SafeHeight", 5.0);
     gCode.passes        = settings->ThawInt("GCode_Passes", 1);
     gCode.feed          = settings->ThawFloat("GCode_Feed", 10.0);
     gCode.plungeFeed    = settings->ThawFloat("GCode_PlungeFeed", 10.0);
@@ -413,7 +414,7 @@ static std::pair<int, std::string> SelectSIPrefixMm(int ord, int dim) {
         default:
             dbp ("dimensions over 3 not supported");
             break;
-    }        
+    }
     return {0, "m"};
 }
 static std::pair<int, std::string> SelectSIPrefixInch(int deg) {

src/solvespace.h

@@ -598,6 +598,7 @@ public:
     }        exportCanvas;
     struct {
         double  depth;
+        double  safeHeight;
         int     passes;
         double  feed;
         double  plungeFeed;

src/ui.h

@@ -314,13 +314,14 @@ public:
         EXPORT_OFFSET         = 110,
         CANVAS_SIZE           = 111,
         G_CODE_DEPTH          = 112,
-        G_CODE_PASSES         = 113,
+        G_CODE_SAFE_HEIGHT    = 113,
-        G_CODE_FEED           = 114,
+        G_CODE_PASSES         = 114,
-        G_CODE_PLUNGE_FEED    = 115,
+        G_CODE_FEED           = 115,
-        AUTOSAVE_INTERVAL     = 116,
+        G_CODE_PLUNGE_FEED    = 116,
-        LIGHT_AMBIENT         = 117,
+        AUTOSAVE_INTERVAL     = 117,
-        FIND_CONSTRAINT_TIMEOUT = 118,
+        LIGHT_AMBIENT         = 118,
-        EXPLODE_DISTANCE      = 119,
+        FIND_CONSTRAINT_TIMEOUT = 119,
+        EXPLODE_DISTANCE      = 120,
         // For TTF text
         TTF_TEXT              = 300,
         // For the step dimension screen