Quash "variable may be used uninitialized" warnings

Whether or not there is any actual danger of these variables being used
without initialization, the warnings are noise, and getting rid of them is
trivial.

bsp.cpp

@@ -49,7 +49,7 @@ void SBsp3::InsertInPlane(bool pos2, STriangle *tr, SMesh *m) {
     Vector tc = ((tr->a).Plus(tr->b).Plus(tr->c)).ScaledBy(1.0/3);
 
     bool onFace = false;
-    bool sameNormal;
+    bool sameNormal = false;
     double maxNormalMag = -1;
 
     Vector lln, trn = tr->Normal();

draw.cpp

@@ -40,7 +40,7 @@ void GraphicsWindow::Selection::Clear(void) {
 }
 
 void GraphicsWindow::Selection::Draw(void) {
-    Vector refp;
+    Vector refp = Vector::From(0, 0, 0);
     if(entity.v) {
         Entity *e = SK.GetEntity(entity);
         e->Draw();

drawconstraint.cpp

@@ -695,7 +695,7 @@ void Constraint::DrawOrGetDistance(Vector *labelPos) {
         }
 
         case PERPENDICULAR: {
-            Vector u, v;
+            Vector u = Vector::From(0, 0, 0), v = Vector::From(0, 0, 0);
             Vector rn, ru;
             if(workplane.v == Entity::FREE_IN_3D.v) {
                 rn = gn;
@@ -845,7 +845,7 @@ void Constraint::DrawOrGetDistance(Vector *labelPos) {
 
         case LENGTH_RATIO:
         case EQUAL_LENGTH_LINES: {
-            Vector a, b;
+            Vector a, b = Vector::From(0, 0, 0);
             for(int i = 0; i < 2; i++) {
                 Entity *e = SK.GetEntity(i == 0 ? entityA : entityB);
                 a = SK.GetEntity(e->point[0])->PointGetNum();

drawentity.cpp

@@ -239,7 +239,9 @@ void Entity::ComputeInterpolatingSpline(SBezierList *sbl, bool periodic) {
     
     // The starting and finishing control points that define our end tangents
     // (if the spline isn't periodic), and the on-curve points.
-    Vector ctrl_s, ctrl_f, pt[MAX_N+4];
+    Vector ctrl_s = Vector::From(0, 0, 0);
+    Vector ctrl_f = Vector::From(0, 0, 0);
+    Vector pt[MAX_N+4];
     if(periodic) {
         for(i = 0; i < ep + 3; i++) {
             pt[i] = SK.GetEntity(point[i])->PointGetNum();

mesh.cpp

@@ -113,7 +113,8 @@ void SMesh::Simplify(int start) {
     STriangle *tout = (STriangle *)AllocTemporary(maxTriangles*sizeof(*tout));
     int toutc = 0;
 
-    Vector n, *conv = (Vector *)AllocTemporary(maxTriangles*3*sizeof(*conv));
+    Vector n = Vector::From(0, 0, 0);
+    Vector *conv = (Vector *)AllocTemporary(maxTriangles*3*sizeof(*conv));
     int convc = 0;
 
     int start0 = start;

modify.cpp

@@ -286,7 +286,7 @@ void GraphicsWindow::MakeTangentArc(void) {
     memset(req, 0, sizeof(req));
 
     Vector pinter;
-    double r, vv;
+    double r = 0.0, vv = 0.0;
     // We now do Newton iterations to find the tangent arc, and its positions
     // t back along the two curves, starting from shared point of the curves
     // at t = 0. Lots of iterations helps convergence, and this is still
@@ -616,7 +616,7 @@ void GraphicsWindow::SplitLinesOrCurves(void) {
     sbla.AllIntersectionsWith(&sblb, &inters);
 
     if(inters.l.n > 0) {
-        Vector pi;
+        Vector pi = Vector::From(0, 0, 0);
         // If there's multiple points, then take the one closest to the
         // mouse pointer.
         double dmin = VERY_POSITIVE;

polygon.cpp

@@ -203,7 +203,8 @@ bool SEdgeList::AssemblePolygon(SPolygon *dest, SEdge *errorAt, bool keepDir) {
 
     bool allClosed = true;
     for(;;) {
-        Vector first, last;
+        Vector first = Vector::From(0, 0, 0);
+        Vector last  = Vector::From(0, 0, 0);
         int i;
         for(i = 0; i < l.n; i++) {
             if(!l.elem[i].tag) {
@@ -826,7 +827,7 @@ void SContour::OffsetInto(SContour *dest, double r) {
             // material as we can without removing any that we shouldn't.
             double px0, py0, pdx, pdy;
             double nx0, ny0, ndx, ndy;
-            double x, y;
+            double x = 0.0, y = 0.0;
 
             px0 = b.x - r*sin(thetap);
             py0 = b.y + r*cos(thetap);

request.cpp

@@ -76,7 +76,7 @@ bool EntReqTable::GetEntityInfo(int ent, int extraPoints,
 }
 
 int EntReqTable::GetRequestForEntity(int ent) {
-    int req;
+    int req = 0;
     GetEntityInfo(ent, 0, &req, NULL, NULL, NULL);
     return req;
 }

srf/ratpoly.cpp

@@ -441,7 +441,7 @@ void SSurface::ClosestPointTo(Vector p, double *u, double *v, bool converge) {
 bool SSurface::ClosestPointNewton(Vector p, double *u, double *v, bool converge)
 {
     // Initial guess is in u, v; refine by Newton iteration.
-    Vector p0;
+    Vector p0 = Vector::From(0, 0, 0);
     for(int i = 0; i < (converge ? 25 : 5); i++) {
         p0 = PointAt(*u, *v);
         if(converge) {

srf/raycast.cpp

@@ -18,7 +18,7 @@ extern int FLAG;
 
 double SSurface::DepartureFromCoplanar(void) {
     int i, j;
-    int ia, ja, ib, jb, ic, jc;
+    int ia, ja, ib = 0, jb = 0, ic = 0, jc = 0;
     double best;
 
     // Grab three points to define a plane; first choose (0, 0) arbitrarily.

srf/surface.cpp

@@ -211,7 +211,7 @@ bool SSurface::LineEntirelyOutsideBbox(Vector a, Vector b, bool segment) {
 void SSurface::MakeTrimEdgesInto(SEdgeList *sel, int flags,
                                  SCurve *sc, STrimBy *stb)
 {
-    Vector prev;
+    Vector prev = Vector::From(0, 0, 0);
     bool inCurve = false, empty = true;
     double u = 0, v = 0;
 

srf/surfinter.cpp

@@ -392,8 +392,8 @@ void SSurface::IntersectAgainst(SSurface *b, SShell *agnstA, SShell *agnstB,
             sc.pts.Add(&padd);
 
             Point2d pa, pb;
-            Vector np, npc;
-            bool fwd;
+            Vector np, npc = Vector::From(0, 0, 0);
+            bool fwd = false;
             // Better to start with a too-small step, so that we don't miss
             // features of the curve entirely.
             double tol, step = maxtol;

system.cpp

@@ -179,7 +179,7 @@ bool System::SolveLinearSystem(double X[], double A[][MAX_UNKNOWNS],
     // Gaussian elimination, with partial pivoting. It's an error if the
     // matrix is singular, because that means two constraints are
     // equivalent.
-    int i, j, ip, jp, imax;
+    int i, j, ip, jp, imax = 0;
     double max, temp;
 
     for(i = 0; i < n; i++) {

ttf.cpp

@@ -318,7 +318,7 @@ bool TtfFont::LoadFontFromFile(bool nameOnly) {
         WORD  nameStringOffset      = GetWORD();
         // And now we're at the name records. Go through those till we find
         // one that we want.
-        int displayNameOffset, displayNameLength;
+        int displayNameOffset = 0, displayNameLength = 0;
         for(i = 0; i < nameCount; i++) {
             WORD    platformID      = GetWORD();
             WORD    encodingID      = GetWORD();
@@ -430,8 +430,8 @@ bool TtfFont::LoadFontFromFile(bool nameOnly) {
         // and advance width) of the font.
         fseek(fh, hmtxAddr, SEEK_SET);
 
-        WORD  hmtxAdvanceWidth;
-        SWORD hmtxLsb;
+        WORD  hmtxAdvanceWidth = 0;
+        SWORD hmtxLsb = 0;
         for(i = 0; i < min(glyphs, hheaNumberOfMetrics); i++) {
             hmtxAdvanceWidth = GetWORD();
             hmtxLsb          = (SWORD)GetWORD();

win32/w32main.cpp

@@ -956,7 +956,7 @@ void RefreshRecentMenus(void)
 HMENU CreateGraphicsWindowMenus(void)
 {
     HMENU top = CreateMenu();
-    HMENU m;
+    HMENU m = 0;
 
     int i;
     int subMenu = 0;