NURBS debugging code

Rebased onto trunk from ruevs/wip-intersection

Author: ruevs

src/dsc.h

@@ -264,8 +264,9 @@ class List {
 
 public:
     int  n = 0;
+    uint32_t cc = 0;
 
-    bool IsEmpty() const { return n == 0; }
+    bool IsEmpty() const { return 0 >= n; }  // A negative number of list elements?!
 
     void ReserveMore(int howMuch) {
         if(n + howMuch > elemsAllocated) {

src/platform/guiwin.cpp

@@ -1701,6 +1701,16 @@ std::vector<std::string> InitGui(int argc, char **argv) {
         SetLocale("en_US");
     }
 
+#ifndef NDEBUG
+    // create a debug console
+    if(AllocConsole()) {
+        (void)freopen("CONOUT$", "w", stdout/*stderr*/);
+        SetConsoleTitle(L"Debug Console");
+        SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),
+                                FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_RED);
+    }
+#endif
+
     return args;
 }
 

src/polygon.cpp

@@ -213,13 +213,14 @@ void SEdgeList::Clear() {
     l.Clear();
 }
 
-void SEdgeList::AddEdge(Vector a, Vector b, int auxA, int auxB, int tag) {
+void SEdgeList::AddEdge(Vector a, Vector b, int auxA, int auxB, int tag, uint32_t cc) {
     SEdge e = {};
     e.tag = tag;
     e.a = a;
     e.b = b;
     e.auxA = auxA;
     e.auxB = auxB;
+    e.cc = cc;
     l.Add(&e);
 }
 

src/polygon.h

@@ -38,6 +38,7 @@ enum class EdgeKind : uint32_t {
 class SEdge {
 public:
     int    tag;
+    uint32_t cc;
     int    auxA, auxB;
     Vector a, b;
 
@@ -50,7 +51,7 @@ class SEdgeList {
     List<SEdge>     l;
 
     void Clear();
-    void AddEdge(Vector a, Vector b, int auxA=0, int auxB=0, int tag=0);
+    void AddEdge(Vector a, Vector b, int auxA=0, int auxB=0, int tag=0, uint32_t cc=0);
     bool AssemblePolygon(SPolygon *dest, SEdge *errorAt, bool keepDir=false) const;
     bool AssembleContour(Vector first, Vector last, SContour *dest,
                             SEdge *errorAt, bool keepDir, int start) const;

src/render/rendergl1.cpp

@@ -476,9 +476,28 @@ void OpenGl1Renderer::DrawLine(const Vector &a, const Vector &b, hStroke hcs) {
 
 void OpenGl1Renderer::DrawEdges(const SEdgeList &el, hStroke hcs) {
     double phase = 0.0;
+    unsigned n        = 0; 
     for(const SEdge *e = el.l.First(); e; e = el.l.NextAfter(e)) {
         DoStippledLine(e->a, e->b, hcs, phase);
         phase += e->a.Minus(e->b).Magnitude();
+
+        /*debug*/
+        if(0 != e->cc) {
+            std::shared_ptr<SolveSpace::ViewportCanvas> canvas = SS.GW.canvas;
+
+            const Camera &camera = canvas->GetCamera();
+
+            Canvas::Stroke strokeError = Style::Stroke(Style::DRAW_ERROR);
+            strokeError.layer          = Canvas::Layer::FRONT;
+            strokeError.width          = 1.0f;
+            Canvas::hStroke hcsError   = canvas->GetStroke(strokeError);
+
+            double textHeight = Style::DefaultTextHeight()*8 / camera.scale;
+
+            DrawVectorText(ssprintf(" %03u-%lu-%i-%i", n, e->cc, e->auxA, e->auxB ), textHeight + textHeight*n/1000, e->a,
+                           camera.projRight, camera.projUp, hcsError);
+            ++n;
+        }
     }
 }