Add a second light, and some little fixes, and remove dead code.

[git-p4: depot-paths = "//depot/solvespace/": change = 1782]

draw.cpp

@@ -810,12 +810,26 @@ void GraphicsWindow::Paint(int w, int h) {
     glClearDepth(1.0); 
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
-    Vector light = VectorFromProjs(-0.49*w/scale, 0.49*h/scale, 0);
+    // Let's use two lights
-    GLfloat lightPos[4] =
-        { (GLfloat)light.x, (GLfloat)light.y, (GLfloat)light.z, 0 };
-    glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
     glEnable(GL_LIGHT0);
+    GLfloat li0[] = { 0.8f, 0.8f, 0.8f, 1.0f };
+    glLightfv(GL_LIGHT0, GL_DIFFUSE, li0);
+    glLightfv(GL_LIGHT0, GL_SPECULAR, li0);
+    glEnable(GL_LIGHT1);
+    GLfloat li1[] = { 0.4f, 0.4f, 0.4f, 1.0f };
+    glLightfv(GL_LIGHT1, GL_DIFFUSE, li1);
+    glLightfv(GL_LIGHT1, GL_SPECULAR, li1);
 
+    Vector lp;
+    lp = VectorFromProjs(-0.49*w/scale, 0.49*h/scale, 0);
+    GLfloat lp0[4] = { (GLfloat)lp.x, (GLfloat)lp.y, (GLfloat)lp.z, 0 };
+    glLightfv(GL_LIGHT0, GL_POSITION, lp0);
+    lp = VectorFromProjs(0.49*w/scale, 0.10*h/scale, 0);
+    GLfloat lp1[4] = { (GLfloat)lp.x, (GLfloat)lp.y, (GLfloat)lp.z, 0 };
+    glLightfv(GL_LIGHT1, GL_POSITION, lp1);
+
+    // For debugging, draw the backs of the triangles in red, so that we
+    // notice when a shell is open
     glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, 1);
     GLfloat ambient[4] = { 0.4f, 0.4f, 0.4f, 1.0f };
     glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);

drawentity.cpp

@@ -42,6 +42,7 @@ void Entity::DrawAll(void) {
             Entity *e = &(SS.entity.elem[i]);
             if(!e->IsPoint()) continue;
             if(!(SS.GetGroup(e->group)->visible)) continue;
+            if(SS.GroupsInOrder(SS.GW.activeGroup, e->group)) continue;
 
             Vector v = e->PointGetNum();
             glxVertex3v(v.Plus (r).Plus (d));

group.cpp

@@ -97,6 +97,7 @@ void Group::MenuGroup(int id) {
             g.opA = SS.GW.activeGroup;
             g.color = RGB(100, 100, 100);
             g.name.strcpy("lathe");
+            SS.GW.ClearSelection();
             break;
 
         case GraphicsWindow::MNU_GROUP_ROT: {

sketch.h

@@ -439,6 +439,8 @@ public:
     hEntity     entityB;
     bool        otherAngle;
 
+    bool        reference; // a ref dimension, that generates no eqs
+
     // These define how the constraint is drawn on-screen.
     struct {
         Vector      offset;

textwin.cpp

@@ -757,25 +757,6 @@ void TextWindow::ShowGroupSolveInfo(void) {
     }
 }
 
-void TextWindow::ShowRequestInfo(void) {
-    Request *r = SS.GetRequest(shown->request);
-
-    char *s;
-    switch(r->type) {
-        case Request::WORKPLANE:     s = "workplane";                break;
-        case Request::DATUM_POINT:   s = "datum point";              break;
-        case Request::LINE_SEGMENT:  s = "line segment";             break;
-        default: oops();
-    }
-    Printf(false, "[[request for %s]]", s);
-}
-
-void TextWindow::ShowConstraintInfo(void) {
-    Constraint *c = SS.GetConstraint(shown->constraint);
-
-    Printf(false, "[[constraint]]");
-}
-
 void TextWindow::EditControlDone(char *s) {
     switch(edit.meaning) {
         case EDIT_TIMES_REPEATED: {

ui.h

@@ -48,8 +48,6 @@ public:
     typedef struct {
         int         screen;
         hGroup      group;
-        hRequest    request;
-        hConstraint constraint;
     } ShownState;
     static const int HISTORY_LEN = 16;
     ShownState showns[HISTORY_LEN];
@@ -74,9 +72,6 @@ public:
     // the sketch.
     void ShowListOfGroups(void);
     void ShowGroupInfo(void);
-    void ShowRequestInfo(void);
-    void ShowEntityInfo(void);
-    void ShowConstraintInfo(void);
     void ShowGroupSolveInfo(void);
     // Special screen, based on selection
     void DescribeSelection(void);

wishlist.txt

@@ -7,6 +7,8 @@ DXF export
 compress file format (binary?)
 partitioned subsystems in the solver
 arbitrary color specification
+specify tolerance for meshing
+specify light positions (all on one configuration screen)
 TTF font text
 display with proper formatting/units
 more measurements