Add direction parameter to statbars in HUD API

Fix health bar overlap when a larger texture is used

doc/lua_api.txt

@@ -407,6 +407,8 @@ The position field is used for all element types.
 To account for differing resolutions, the position coordinates are the percentage of the screen,
 ranging in value from 0 to 1.
 The name field is not yet used, but should contain a description of what the HUD element represents.
+The direction field is the direction in which something is drawn.
+0 draws from left to right, 1 draws from right to left, 2 draws from top to bottom, and 3 draws from bottom to top.
 Below are the specific uses for fields in each type; fields not listed for that type are ignored.
 
 Note: Future revisions to the HUD API may be incompatible; the HUD API is still in the experimental stages.
@@ -428,15 +430,12 @@ Note: Future revisions to the HUD API may be incompatible; the HUD API is still
     - text: The name of the texture that is used.
     - number: The number of half-textures that are displayed.
               If odd, will end with a vertically center-split texture.
+    - direction
 - inventory
     - text: The name of the inventory list to be displayed.
     - number: Number of items in the inventory to be displayed.
     - item: Position of item that is selected.
-    - direction: Direction in which the inventory list is drawn.
-                 0 draws from left to right,
-                 1 draws from right to left,
-                 2 draws from top to bottom, and
-                 3 draws from bottom to top.
+    - direction
 
 Representations of simple things
 --------------------------------
@@ -1856,6 +1855,6 @@ HUD Definition (hud_add, hud_get)
     number = 2,
     item = 3,
     ^ Selected item in inventory.  0 for no item selected.
-    dir = 0,
+    direction = 0,
     ^ Direction: 0: left-right, 1: right-left, 2: top-bottom, 3: bottom-top
 }

src/hud.cpp

@@ -198,7 +198,7 @@ void Hud::drawLuaElements() {
 				font->draw(narrow_to_wide(e->text).c_str(), size + pos, color);
 				break; }
 			case HUD_ELEM_STATBAR:
-				drawStatbar(pos, e->text, e->number);
+				drawStatbar(pos, HUD_CORNER_UPPER, e->dir, e->text, e->number);
 				break;
 			case HUD_ELEM_INVENTORY: {
 				InventoryList *inv = inventory->getList(e->text);
@@ -212,38 +212,55 @@ void Hud::drawLuaElements() {
 }
 
 
-void Hud::drawStatbar(v2s32 upperleftpos, std::string texture, s32 count) {
+void Hud::drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count) {
+	const video::SColor color(255, 255, 255, 255);
+	const video::SColor colors[] = {color, color, color, color};
+	
 	video::ITexture *stat_texture =
 		gamedef->getTextureSource()->getTextureRaw(texture);
 	if (!stat_texture)
 		return;
 		
-	v2s32 p = upperleftpos;
+	core::dimension2di srcd(stat_texture->getOriginalSize());
+
+	v2s32 p = pos;
+	if (corner & HUD_CORNER_LOWER)
+		p -= srcd.Height;
+
+	v2s32 steppos;
+	switch (drawdir) {
+		case HUD_DIR_RIGHT_LEFT:
+			steppos = v2s32(-1, 0);
+			break;
+		case HUD_DIR_TOP_BOTTOM:
+			steppos = v2s32(0, 1);
+			break;
+		case HUD_DIR_BOTTOM_TOP:
+			steppos = v2s32(0, -1);
+			break;
+		default:
+			steppos = v2s32(1, 0);	
+	}
+	steppos.X *= srcd.Width;
+	steppos.Y *= srcd.Height;
+	
 	for (s32 i = 0; i < count / 2; i++)
 	{
-		core::dimension2di srcd(stat_texture->getOriginalSize());
-		const video::SColor color(255, 255, 255, 255);
-		const video::SColor colors[] = {color, color, color, color};
-		core::rect<s32> rect(0, 0, srcd.Width, srcd.Height);
-		rect += p;
-		driver->draw2DImage(stat_texture, rect,
-			core::rect<s32>(core::position2d<s32>(0, 0), srcd),
-			NULL, colors, true);
-		p += v2s32(srcd.Width, 0);
+		core::rect<s32> srcrect(0, 0, srcd.Width, srcd.Height);
+		core::rect<s32> dstrect(srcrect);
+
+		dstrect += p;
+		driver->draw2DImage(stat_texture, dstrect, srcrect, NULL, colors, true);
+		p += steppos;
 	}
 	
 	if (count % 2 == 1)
 	{
-		core::dimension2di srcd(stat_texture->getOriginalSize());
-		const video::SColor color(255, 255, 255, 255);
-		const video::SColor colors[] = {color, color, color, color};
-		core::rect<s32> rect(0, 0, srcd.Width / 2, srcd.Height);
-		rect += p;
-		srcd.Width /= 2;
-		driver->draw2DImage(stat_texture, rect,
-			core::rect<s32>(core::position2d<s32>(0, 0), srcd),
-			NULL, colors, true);
-		p += v2s32(srcd.Width * 2, 0);
+		core::rect<s32> srcrect(0, 0, srcd.Width / 2, srcd.Height);
+		core::rect<s32> dstrect(srcrect);
+
+		dstrect += p;
+		driver->draw2DImage(stat_texture, dstrect, srcrect, NULL, colors, true);
 	}
 }
 
@@ -260,14 +277,15 @@ void Hud::drawHotbar(v2s32 centerlowerpos, s32 halfheartcount, u16 playeritem) {
 	v2s32 pos = centerlowerpos - v2s32(width / 2, hotbar_imagesize + padding * 2);
 	
 	drawItem(pos, hotbar_imagesize, hotbar_itemcount, mainlist, playeritem + 1, 0);
-	drawStatbar(pos + v2s32(0, -20), "heart.png", halfheartcount);
+	drawStatbar(pos - v2s32(0, 4), HUD_CORNER_LOWER, HUD_DIR_LEFT_RIGHT,
+				"heart.png", halfheartcount);
 }
 
 
 void Hud::drawCrosshair() {
-	driver->draw2DLine(displaycenter - v2s32(10,0),
+	driver->draw2DLine(displaycenter - v2s32(10, 0),
 			displaycenter + v2s32(10, 0), crosshair_argb);
-	driver->draw2DLine(displaycenter - v2s32(0,10),
+	driver->draw2DLine(displaycenter - v2s32(0, 10),
 			displaycenter + v2s32(0, 10), crosshair_argb);
 }
 

src/hud.h

@@ -27,6 +27,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define HUD_DIR_TOP_BOTTOM 2
 #define HUD_DIR_BOTTOM_TOP 3
 
+#define HUD_CORNER_UPPER  0
+#define HUD_CORNER_LOWER  1
+#define HUD_CORNER_CENTER 2
+
 class Player;
 
 enum HudElementType {
@@ -102,7 +106,7 @@ public:
 	void drawItem(v2s32 upperleftpos, s32 imgsize, s32 itemcount,
 		InventoryList *mainlist, u16 selectitem, u16 direction);
 	void drawLuaElements();
-	void drawStatbar(v2s32 upperleftpos, std::string texture, s32 count);
+	void drawStatbar(v2s32 pos, u16 corner, u16 drawdir, std::string texture, s32 count);
 	
 	void drawHotbar(v2s32 centerlowerpos, s32 halfheartcount, u16 playeritem);
 	void resizeHotbar();

src/scriptapi_object.cpp

@@ -749,7 +749,7 @@ int ObjectRef::l_hud_add(lua_State *L)
 	elem->text   = getstringfield_default(L, 2, "text", "");
 	elem->number = getintfield_default(L, 2, "number", 0);
 	elem->item   = getintfield_default(L, 2, "item", 0);
-	elem->dir    = getintfield_default(L, 2, "dir", 0);
+	elem->dir    = getintfield_default(L, 2, "direction", 0);
 
 	u32 id = get_server(L)->hudAdd(player, elem);
 	if (id == (u32)-1) {