Water tight boundaries between tiles

modules/odm_dem2mesh/src/Simplify.h

@@ -283,7 +283,7 @@ class SymetricMatrix {
 namespace Simplify
 {
 	// Global Variables & Strctures
-    struct Triangle { int v[3];double err[4];int deleted,dirty;vec3f n; };
+    struct Triangle { int v[3];double err[4];int8_t deleted,dirty;vec3f n; };
 	struct Vertex { vec3f p;int tstart,tcount;SymetricMatrix q;int border;};
 	struct Ref { int tid,tvertex; };
 	std::vector<Triangle> triangles;
@@ -310,10 +310,10 @@ namespace Simplify
 	void simplify_mesh(int target_count, double agressiveness=7, bool verbose=false)
 	{
 		// init
-		loopi(0,triangles.size())
-        {
-            triangles[i].deleted=0;
-        }
+//		loopi(0,triangles.size())
+//        {
+//            triangles[i].deleted=0;
+//        }
 
 		// main iteration loop
 		int deleted_triangles=0;
@@ -352,7 +352,8 @@ namespace Simplify
 			{
 				Triangle &t=triangles[i];
 				if(t.err[3]>threshold) continue;
-				if(t.deleted) continue;
+                if(t.deleted == 1) continue;
+                if(t.deleted == -1) continue;
 				if(t.dirty) continue;
 
 				loopj(0,3)if(t.err[j]<threshold)
@@ -406,7 +407,7 @@ namespace Simplify
 	void simplify_mesh_lossless(bool verbose=false)
 	{
 		// init
-		loopi(0,triangles.size()) triangles[i].deleted=0;
+//		loopi(0,triangles.size()) triangles[i].deleted=0;
 
 		// main iteration loop
 		int deleted_triangles=0;
@@ -436,8 +437,9 @@ namespace Simplify
 			{
 				Triangle &t=triangles[i];
 				if(t.err[3]>threshold) continue;
-				if(t.deleted) continue;
-				if(t.dirty) continue;
+                if(t.deleted == 1) continue;
+                if(t.deleted == -1) continue;
+                if(t.dirty) continue;
 
 				loopj(0,3)if(t.err[j]<threshold)
 				{
@@ -497,7 +499,7 @@ namespace Simplify
 		loopk(0,v0.tcount)
 		{
 			Triangle &t=triangles[refs[v0.tstart+k].tid];
-			if(t.deleted)continue;
+            if(t.deleted == 1)continue;
 
 			int s=refs[v0.tstart+k].tvertex;
 			int id1=t.v[(s+1)%3];
@@ -530,7 +532,8 @@ namespace Simplify
 		{
 			Ref &r=refs[v.tstart+k];
 			Triangle &t=triangles[r.tid];
-			if(t.deleted)continue;
+            if(t.deleted == 1)continue;
+
 			if(deleted[k])
 			{
 				t.deleted=1;
@@ -555,7 +558,7 @@ namespace Simplify
 		{
 			int dst=0;
 			loopi(0,triangles.size())
-			if(!triangles[i].deleted)
+            if(triangles[i].deleted == 0 || triangles[i].deleted == -1)
 			{
 				triangles[dst++]=triangles[i];
 			}
@@ -677,7 +680,7 @@ namespace Simplify
 			vertices[i].tcount=0;
 		}
 		loopi(0,triangles.size())
-		if(!triangles[i].deleted)
+        if(triangles[i].deleted == 0 || triangles[i].deleted == -1)
 		{
 			Triangle &t=triangles[i];
 			triangles[dst++]=t;

modules/odm_dem2mesh/src/main.cpp

@@ -128,7 +128,7 @@ int main(int argc, char **argv) {
         // to remain within INT_MAX vertices. This does not happen often,
         // but it's a safeguard to make sure we'll get an output and not
         // overflow.
-        int stride = 4;
+        int stride = 1;
         while (vertex_count > INT_MAX){
             stride *= 2;
             vertex_count = static_cast<int>(std::ceil((arr_height / static_cast<double>(stride))) *
@@ -191,6 +191,8 @@ int main(int argc, char **argv) {
                         t1.v[0] = cols * (y + 1) + x;
                         t1.v[1] = cols * y + x + 1;
                         t1.v[2] = cols * y + x;
+                        /*if (y == 0 || x == 0 || y == rows - 1 || x == cols -1) t1.deleted = -1; // freeze
+                        else */t1.deleted = 0;
 
                         Simplify::triangles.push_back(t1);
 
@@ -198,6 +200,8 @@ int main(int argc, char **argv) {
                         t2.v[0] = cols * (y + 1) + x;
                         t2.v[1] = cols * (y + 1) + x + 1;
                         t2.v[2] = cols * y + x + 1;
+                        /*if (y == 0 || x == 0 || y == rows - 1 || x == cols -1) t2.deleted = -1; // freeze
+                        else */t1.deleted = 0;
 
                         Simplify::triangles.push_back(t2);
                     }