From fa9488baca1bc9b763b8f518a935cb7fbf4f7cd9 Mon Sep 17 00:00:00 2001
From: zzzzrrr <mason.green@gmail.com>
Date: Wed, 20 Jan 2010 12:25:10 -0500
Subject: [PATCH] added DrawMap

---
 poly2tri/sweep/cdt.cc           |  4 +++
 poly2tri/sweep/cdt.h            |  2 ++
 poly2tri/sweep/sweep_context.cc |  4 +++
 poly2tri/sweep/sweep_context.h  |  1 +
 testbed/main.cc                 | 46 ++++++++++++++++++++++++++++++---
 5 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/poly2tri/sweep/cdt.cc b/poly2tri/sweep/cdt.cc
index 5410c8b..3987cc8 100644
--- a/poly2tri/sweep/cdt.cc
+++ b/poly2tri/sweep/cdt.cc
@@ -47,6 +47,10 @@ std::vector<Triangle*> CDT::GetTriangles() {
   return sweep_context_->GetTriangles();
 }
 
+std::list<Triangle*> CDT::GetMap() {
+  return sweep_context_->GetMap();
+}
+
 CDT::~CDT() {
 	delete sweep_context_;
 	delete sweep_;
diff --git a/poly2tri/sweep/cdt.h b/poly2tri/sweep/cdt.h
index de49110..b7cc058 100644
--- a/poly2tri/sweep/cdt.h
+++ b/poly2tri/sweep/cdt.h
@@ -46,6 +46,8 @@ public:
 	void Triangulate();
   /// Get Delaunay triangles
   std::vector<Triangle*> GetTriangles();
+  /// Get triangle map
+  std::list<Triangle*> CDT::GetMap();
 
 private:
 
diff --git a/poly2tri/sweep/sweep_context.cc b/poly2tri/sweep/sweep_context.cc
index 150d54e..761829c 100644
--- a/poly2tri/sweep/sweep_context.cc
+++ b/poly2tri/sweep/sweep_context.cc
@@ -21,6 +21,10 @@ std::vector<Triangle*> SweepContext::GetTriangles() {
   return triangles_;
 }
 
+std::list<Triangle*> SweepContext::GetMap() {
+  return map_;
+}
+
 void SweepContext::InitTriangulation() {
 
   double xmax(points_[0]->x), xmin(points_[0]->x);
diff --git a/poly2tri/sweep/sweep_context.h b/poly2tri/sweep/sweep_context.h
index 253e4e1..f0a63fb 100644
--- a/poly2tri/sweep/sweep_context.h
+++ b/poly2tri/sweep/sweep_context.h
@@ -83,6 +83,7 @@ public:
   void MeshClean(Triangle& triangle);
   
   std::vector<Triangle*> GetTriangles();
+  std::list<Triangle*> GetMap();
   
   std::vector<Edge*> edge_list;
   
diff --git a/testbed/main.cc b/testbed/main.cc
index 9ddd802..4aa2cdd 100644
--- a/testbed/main.cc
+++ b/testbed/main.cc
@@ -46,13 +46,17 @@ void Init();
 void ShutDown(int return_code);
 void MainLoop(const double zoom);
 void Draw(const double zoom);
+void DrawMap(const double zoom);
 void ConstrainedColor(bool constrain);
 
 float rotate_y = 0,
       rotate_z = 0;
 const float rotations_per_tick = .2;
 
+/// Constrained triangles
 vector<Triangle*> triangles;
+/// Triangle map
+list<Triangle*> map;
 
 double StringToDouble(const std::string& s) {
   std::istringstream i(s);
@@ -62,6 +66,8 @@ double StringToDouble(const std::string& s) {
   return x;
 }
 
+bool draw_map = false;
+
 int main(int argc, char* argv[]) {
   
   if (argc != 3) {
@@ -124,6 +130,7 @@ int main(int argc, char* argv[]) {
   cout << "Elapsed time (secs) = " << dt << endl;
   
   triangles = cdt->GetTriangles();
+  map = cdt->GetMap();
   
   MainLoop(atof(argv[2]));
   
@@ -184,7 +191,12 @@ void MainLoop(const double zoom)
     rotate_z += delta_rotate;
  
     // Draw the scene
-    Draw(zoom);
+    if(draw_map) {
+      DrawMap(zoom);
+    } else {
+      Draw(zoom);
+    }
+    
     // swap back and front buffers
     glfwSwapBuffers();
   }
@@ -214,8 +226,8 @@ void ResetZoom(double zoom, double cx, double cy, double width, double height) {
     
 }
     
-void Draw(const double zoom)
-{
+void Draw(const double zoom) {
+
   // reset zoom
   Point center = Point(0, 0);
   
@@ -250,6 +262,34 @@ void Draw(const double zoom)
   
 }
 
+void DrawMap(const double zoom) {
+
+  // reset zoom
+  Point center = Point(0, 0);
+  
+  ResetZoom(zoom, center.x, center.y, 800, 600);
+  
+  list<Triangle*>::iterator it; 
+  for (it = map.begin(); it != map.end(); it++) {
+  
+    Triangle& t = **it;
+    Point& a = *t.GetPoint(0);
+    Point& b = *t.GetPoint(1);
+    Point& c = *t.GetPoint(2);
+    
+    // Red
+    glColor3f(1, 0, 0);
+    
+    glBegin(GL_LINE_LOOP);                      
+      glVertex2f(a.x, a.y);                         
+      glVertex2f(b.x, b.y);                          
+      glVertex2f(c.x, c.y);                           
+    glEnd();
+  
+  }
+  
+}
+
 void ConstrainedColor(bool constrain) {
   if(constrain) {
     // Green