Improvements in minimap drawing

modules/gamelib/ui/uiminimap.lua

@@ -129,11 +129,11 @@ function UIMinimap:removeFlag(pos, icon, description)
 end
 
 function UIMinimap:updateFlag(flag)
-  local topLeft, bottomRight = self:getArea()
+  local point = self:getPoint(flag.pos)
-  if self:isFlagVisible(flag, topLeft, bottomRight) then
+  if self:containsPoint(point) and self:getZoom() > 0 then
     flag:setVisible(true)
-    flag:setMarginLeft(-5.5 + (self:getWidth() / (bottomRight.x - topLeft.x)) * (flag.pos.x - topLeft.x))
+    flag:setMarginLeft(point.x - self:getX() - flag:getWidth()/2)
-    flag:setMarginTop(-5.5 + (self:getHeight() / (bottomRight.y - topLeft.y)) * (flag.pos.y - topLeft.y))
+    flag:setMarginTop(point.y - self:getY() - flag:getHeight()/2)
   else
     flag:setVisible(false)   
   end
@@ -317,6 +317,4 @@ function UIMinimap:getArea()
   return topLeft, bottomRight
 end
 
-function UIMinimap:isFlagVisible(flag, topLeft, bottomRight)
+
-  return flag.pos.x >= topLeft.x and flag.pos.x <= bottomRight.x and flag.pos.y >= topLeft.y and flag.pos.y <= bottomRight.y and flag.pos.z == topLeft.z
-end

src/client/luafunctions.cpp

@@ -593,6 +593,7 @@ void Client::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIMinimap>("setCameraPosition", &UIMinimap::setCameraPosition);
     g_lua.bindClassMemberFunction<UIMinimap>("setCross", &UIMinimap::setCross);
     g_lua.bindClassMemberFunction<UIMinimap>("followCreature", &UIMinimap::followCreature);
+    g_lua.bindClassMemberFunction<UIMinimap>("getPoint", &UIMinimap::getPoint);
     g_lua.bindClassMemberFunction<UIMinimap>("getPosition", &UIMinimap::getPosition);
     g_lua.bindClassMemberFunction<UIMinimap>("getCameraPosition", &UIMinimap::getCameraPosition);
     g_lua.bindClassMemberFunction<UIMinimap>("getFollowingCreature", &UIMinimap::getFollowingCreature);

src/client/minimap.cpp

@@ -97,18 +97,10 @@ void Minimap::draw(const Rect& screenRect, const Position& mapCenter, float scal
 {
     if(screenRect.isEmpty())
         return;
-
     if(MMBLOCK_SIZE*scale <= 1)
         return;
 
-    Size mapSize = screenRect.size() / scale;
+    Rect mapRect = calcMapRect(screenRect, mapCenter, scale);
-    while(mapSize.width() > 8192 || mapSize.height() > 8192) {
-        scale *= 2;
-        mapSize = screenRect.size() / scale;
-    }
-    Rect mapRect(0, 0, mapSize);
-    mapRect.moveCenter(Point(mapCenter.x, mapCenter.y));
-
     g_painter->saveState();
     g_painter->setColor(Color::black);
     g_painter->drawFilledRect(screenRect);
@@ -119,14 +111,15 @@ void Minimap::draw(const Rect& screenRect, const Position& mapCenter, float scal
     Point p = getBlockOffset(mapRect.topLeft() - Point(1,1));
     g_painter->translate(-(mapRect.topLeft() - p)*scale);
 
-    if(scale > 1.0f)
+    Size wantedSize = mapRect.size() * scale;
-        g_painter->translate(Point(1,1) * scale * 0.5f);
+    Point off = Point(wantedSize.toPoint() - screenRect.size().toPoint())/2;
+    g_painter->translate(-off);
 
-    for(int y = p.y, ys = 0;y<=mapRect.bottom();y += MMBLOCK_SIZE, ys += MMBLOCK_SIZE*scale) {
+    for(int y = p.y, ys = 0;y<=mapRect.bottom()+1;y += MMBLOCK_SIZE, ys += MMBLOCK_SIZE*scale) {
         if(y < 0 || y >= 65536 - MMBLOCK_SIZE)
             continue;
 
-        for(int x = p.x, xs = 0;x<=mapRect.right();x += MMBLOCK_SIZE, xs += MMBLOCK_SIZE*scale) {
+        for(int x = p.x, xs = 0;x<=mapRect.right()+1;x += MMBLOCK_SIZE, xs += MMBLOCK_SIZE*scale) {
             if(x < 0 || x >= 65536 - MMBLOCK_SIZE)
                 continue;
 
@@ -151,32 +144,50 @@ void Minimap::draw(const Rect& screenRect, const Position& mapCenter, float scal
     g_painter->restoreSavedState();
 }
 
+Point Minimap::getPoint(const Position& pos, const Rect& screenRect, const Position& mapCenter, float scale)
+{
+    if(screenRect.isEmpty())
+        return Point(-1,-1);
+    if(MMBLOCK_SIZE*scale <= 1)
+        return Point(-1,-1);
+
+    Rect mapRect = calcMapRect(screenRect, mapCenter, scale);
+    Point off = Point((mapRect.size() * scale).toPoint() - screenRect.size().toPoint())/2;
+    Point posoff = (Point(pos.x,pos.y) - mapRect.topLeft())*scale;
+    return posoff + screenRect.topLeft() - off + (Point(1,1)*scale)/2;
+}
+
 Position Minimap::getPosition(const Point& point, const Rect& screenRect, const Position& mapCenter, float scale)
 {
     if(screenRect.isEmpty())
         return Position();
-
     if(MMBLOCK_SIZE*scale <= 1)
         return Position();
 
-    Position pos(mapCenter);
+    Rect mapRect = calcMapRect(screenRect, mapCenter, scale);
-
+    Point off = Point((mapRect.size() * scale).toPoint() - screenRect.size().toPoint())/2;
-    Size mapSize = screenRect.size() / scale;
+    Point pos2d = (point - screenRect.topLeft() + off)/scale + mapRect.topLeft();
-    while(mapSize.width() > 8192 || mapSize.height() > 8192) {
+    return Position(pos2d.x, pos2d.y, mapCenter.z);
-        scale *= 2;
-        mapSize = screenRect.size() / scale;
-    }
-    Rect mapRect(0, 0, mapSize);
-    mapRect.moveCenter(Point(mapCenter.x, mapCenter.y));
-
-    Point p = (point - screenRect.topLeft() - Point(1,1) * scale * 0.5f)/scale + mapRect.topLeft();
-
-    pos.x = p.x;
-    pos.y = p.y;
-
-    return pos;
 }
 
+Rect Minimap::calcMapRect(const Rect& screenRect, const Position& mapCenter, float scale)
+{
+    int w, h;
+    do {
+        w = std::ceil(screenRect.width() / scale);
+        h = std::ceil(screenRect.height() / scale);
+        if(w % 2 == 0)
+            w++;
+        if(h % 2 == 0)
+            h++;
+        scale *= 2;
+    } while(w > 8192 || h > 8192);
+    Rect mapRect(0,0,h,w);
+    mapRect.moveCenter(Point(mapCenter.x, mapCenter.y));
+    return mapRect;
+}
+
+
 void Minimap::updateTile(const Position& pos, const TilePtr& tile)
 {
     MinimapTile minimapTile;

src/client/minimap.h

@@ -82,6 +82,7 @@ public:
     void clean();
 
     void draw(const Rect& screenRect, const Position& mapCenter, float scale);
+    Point getPoint(const Position& pos, const Rect& screenRect, const Position& mapCenter, float scale);
     Position getPosition(const Point& point, const Rect& screenRect, const Position& mapCenter, float scale);
 
     void updateTile(const Position& pos, const TilePtr& tile);
@@ -91,6 +92,7 @@ public:
     void saveOtmm(const std::string& fileName);
 
 private:
+    Rect calcMapRect(const Rect& screenRect, const Position& mapCenter, float scale);
     bool hasBlock(const Position& pos) { return m_tileBlocks[pos.z].find(getBlockIndex(pos)) != m_tileBlocks[pos.z].end(); }
     MinimapBlock& getBlock(const Position& pos) { return m_tileBlocks[pos.z][getBlockIndex(pos)]; }
     Point getBlockOffset(const Point& pos) { return Point(pos.x - pos.x % MMBLOCK_SIZE,

src/client/uiminimap.cpp

@@ -80,6 +80,11 @@ void UIMinimap::setCameraPosition(const Position& pos)
     m_cameraPosition = pos;
 }
 
+Point UIMinimap::getPoint(const Position& pos)
+{
+    return g_minimap.getPoint(pos, getPaddingRect(), getCameraPosition(), m_scale);
+}
+
 Position UIMinimap::getPosition(const Point& mousePos)
 {
     return g_minimap.getPosition(mousePos, getPaddingRect(), getCameraPosition(), m_scale);

src/client/uiminimap.h

@@ -43,6 +43,7 @@ public:
     void setCross(bool enable) { m_crossEnabled = enable; }
     void followCreature(const CreaturePtr& creature);
 
+    Point getPoint(const Position& pos);
     Position getPosition(const Point& mousePos);
     Position getCameraPosition();
     CreaturePtr getFollowingCreature() { return m_followingCreature; }