1 files changed, 145 insertions, 4 deletions

diff --git a/edit.c b/edit.c
index bb20d89..0fc01aa 100644
--- a/edit.c
+++ b/edit.c
@@ -1,4 +1,7 @@
 #include "edit.h"
+#include "level.h"
+#include "geometry.h"
+#include <stdlib.h>
 
 
 static int editMode = EDIT_MODE_VIEW;
@@ -6,6 +9,8 @@ static int editMode = EDIT_MODE_VIEW;
 static ROOM *activeRoom = NULL;
 static ROOM *hoveredRoom = NULL;
 
+static VERTEX hoveredVertex;
+static int hasHoveredVertex = 0;
 
 int getEditMode() {
   return editMode;
@@ -18,14 +23,150 @@ ROOM *getActiveRoom() {
 void setActiveRoom(ROOM *room) {
   activeRoom = room;
   
-  if(editMode == EDIT_MODE_VIEW || editMode == EDIT_MODE_SELECTED)
-    editMode = (room == NULL) ? EDIT_MODE_VIEW : EDIT_MODE_SELECTED;
+  if(room == NULL) {
+    editMode = EDIT_MODE_VIEW;
+  }
+  else if(editMode == EDIT_MODE_VIEW) {
+    editMode = EDIT_MODE_SELECTED;
+  }
+}
+
+VERTEX *getHoveredVertex() {
+  if(hasHoveredVertex) return &hoveredVertex;
+  else return NULL;
+}
+
+void setHoveredVertex(VERTEX *v) {
+  int i;
+  LEVEL *l;
+  
+  if(v) {
+    hasHoveredVertex = 1;
+    hoveredVertex = *v;
+    
+    l = getLevel();
+    hoveredRoom = NULL;
+    
+    for(i = 0; i < l->nRooms; i++) {
+      if(vertexInPolygon(v, &l->rooms[i].polygon)) {
+        hoveredRoom = &l->rooms[i];
+        break;
+      }
+    }
+  }
+  else {
+    hasHoveredVertex = 0;
+    hoveredRoom = NULL;
+  }
+}
+
+void startAddMode() {
+  ROOM room = {{0, NULL}, calloc(1, sizeof(unsigned char))};
+  
+  activeRoom = calloc(1, sizeof(ROOM));
+  activeRoom->polygon.nVertices = 0;
+  activeRoom->polygon.vertices = NULL;
+  activeRoom->name = calloc(1, sizeof(unsigned char));
+  
+  editMode = EDIT_MODE_ADD;
+}
+
+void endAddMode() {
+  editMode = activeRoom ? EDIT_MODE_SELECTED : EDIT_MODE_VIEW;
 }
 
 ROOM *getHoveredRoom() {
   return hoveredRoom;
 }
 
-void setHoveredRoom(ROOM *room) {
-  hoveredRoom = room;
+static isLineOk(LINE *l) {
+  LEVEL *lvl = getLevel();
+  LINE l2;
+  int i;
+  
+  
+  if(activeRoom) {
+    for(i = 0; i+2 < activeRoom->polygon.nVertices; i++) {
+      l2.v1 = activeRoom->polygon.vertices[i];
+      l2.v2 = activeRoom->polygon.vertices[i+1];
+      
+      if(lineIntersection(l, &l2, NULL) == INTERSECTION_SEGMENT_SEGMENT) return 0;
+    }
+    
+    if(activeRoom->polygon.nVertices > 1) {
+      l2.v1 = activeRoom->polygon.vertices[activeRoom->polygon.nVertices-2];
+      l2.v2 = activeRoom->polygon.vertices[activeRoom->polygon.nVertices-1];
+      if(vertexOnLine(&l->v2, &l2)) return 0;
+    }
+  }
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(linePolygonIntersection(l, &lvl->rooms[i].polygon))
+      return 0;
+  }
+  
+  return 1;
+}
+
+int isVertexOk(VERTEX *v) {
+  LEVEL *lvl = getLevel();
+  LINE l;
+  int i;
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(vertexInPolygon(v, &lvl->rooms[i].polygon)) return 0;
+  }
+  
+  if(!(getActiveRoom() && getActiveRoom()->polygon.nVertices))
+    return 1;
+  
+  l.v1 = getActiveRoom()->polygon.vertices[getActiveRoom()->polygon.nVertices-1];
+  l.v2 = *v;
+    
+  return isLineOk(&l);
+}
+
+
+
+int isPolygonOk(POLYGON *polygon) {
+  LEVEL *lvl = getLevel();
+  LINE l, l2;
+  int i, j;
+  
+  if(!polygon->nVertices) return 0;
+  
+  for(i = 0; i < lvl->nRooms; i++) {
+    if(!lvl->rooms[i].polygon.nVertices) continue;
+    
+    if(vertexInPolygon(&polygon->vertices[0], &lvl->rooms[i].polygon))
+      return 0;
+    
+    if(vertexInPolygon(&lvl->rooms[i].polygon.vertices[0], polygon))
+      return 0;
+  }
+  
+  if(polygon->nVertices == 1)
+    return 1;
+  
+  for(i = 0; i < polygon->nVertices; i++) {
+    l.v1 = polygon->vertices[i];
+    l.v2 = polygon->vertices[(i+1)%polygon->nVertices];
+    
+    for(j = 0; j < lvl->nRooms; j++) {
+      if(linePolygonIntersection(&l, &lvl->rooms[j].polygon))
+        return 0;
+    }
+    
+    for(j = i+2; j < polygon->nVertices; j++) {
+      if(i == 0 && j == polygon->nVertices-1) continue;
+      
+      l2.v1 = polygon->vertices[j];
+      l2.v2 = polygon->vertices[(j+1)%polygon->nVertices];
+      
+      if(lineIntersection(&l, &l2, NULL) == INTERSECTION_SEGMENT_SEGMENT)
+        return 0;
+    }
+  }
+  
+  return 1;
 }