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-rw-r--r--source/Blocks/BlockFire.h190
1 files changed, 188 insertions, 2 deletions
diff --git a/source/Blocks/BlockFire.h b/source/Blocks/BlockFire.h
index d3ba499b1..36ec6bbb3 100644
--- a/source/Blocks/BlockFire.h
+++ b/source/Blocks/BlockFire.h
@@ -16,6 +16,28 @@ public:
{
}
+ /// Portal boundary and direction variables
+ int XZP, XZM, Dir; // For wont of a better name...
+
+ virtual void OnPlaced(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta) override
+ {
+ /*
+ PORTAL FINDING ALGORITH
+ =======================
+ -Get clicked base block
+ -Trace upwards to find first obsidian block; aborts if anything other than obsidian or air is encountered.
+ Uses this value as a reference (the 'ceiling')
+ -For both directions (if one fails, try the other), BASE (clicked) block:
+ -Go in one direction, only stop if a non obsidian block is encountered (abort) OR a portal border is encountered (FindObsidianCeiling returns -1)
+ -If a border was encountered, go the other direction and repeat above
+ -Write borders to XZP and XZM, write direction portal faces to Dir
+ -Loop through boundary variables, and fill with portal blocks based on Dir with meta from Dir
+ */
+
+ a_BlockY--; // Because we want the block below the fire
+ FindAndSetPortalFrame(a_BlockX, a_BlockY, a_BlockZ, a_World); // Brought to you by Aperture Science
+ }
+
virtual void OnDigging(cWorld * a_World, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) override
{
a_World->DigBlock(a_BlockX, a_BlockY, a_BlockZ);
@@ -30,12 +52,176 @@ public:
{
return true;
}
-
+
virtual const char * GetStepSound(void) override
{
return "step.wood";
}
-} ;
+
+ /// Traces along YP until it finds an obsidian block, returns Y difference or 0 if no portal, and -1 for border
+ /// Takes the X, Y, and Z of the base block; with an optional MaxY for portal border finding
+ int FindObsidianCeiling(int X, int Y, int Z, cWorld * a_World, int MaxY = 0)
+ {
+ if (a_World->GetBlock(X, Y, Z) != E_BLOCK_OBSIDIAN)
+ {
+ return 0;
+ }
+
+ int newY = Y + 1;
+
+ for (newY; newY < cChunkDef::Height; newY++)
+ {
+ BLOCKTYPE Block = a_World->GetBlock(X, newY, Z);
+ if ((Block == E_BLOCK_AIR) || (Block == E_BLOCK_FIRE))
+ {
+ continue;
+ }
+ else if (Block == E_BLOCK_OBSIDIAN)
+ {
+ // We found an obsidian ceiling
+ // Make sure MaxY has a value and newY ('ceiling' location) is at one above the base block
+ // This is because the frame is a solid obsidian pillar
+ if ((MaxY != 0) && (newY == Y + 1))
+ {
+ return EvaluatePortalBorder(X, newY, Z, MaxY, a_World);
+ }
+ else
+ {
+ // Return ceiling Y, whoever called this function will decide if it's part of a portal or not
+ return newY;
+ }
+ }
+ else { return 0; }
+ }
+
+ return 0;
+ }
+
+ /// Evaluates if coords have a valid border on top, based on MaxY
+ int EvaluatePortalBorder(int X, int FoundObsidianY, int Z, int MaxY, cWorld * a_World)
+ {
+ for (int checkBorder = FoundObsidianY + 1; checkBorder <= MaxY - 1; checkBorder++) // FoundObsidianY + 1: FoundObsidianY has already been checked in FindObsidianCeiling; MaxY - 1: portal doesn't need corners
+ {
+ if (a_World->GetBlock(X, checkBorder, Z) != E_BLOCK_OBSIDIAN)
+ {
+ // Base obsidian, base + 1 obsidian, base + x NOT obsidian -> not complete portal
+ return 0;
+ }
+ }
+ // Everything was obsidian, found a border!
+ return -1; // Return -1 for a frame border
+ }
+
+ /// Finds entire frame in any direction with the coordinates of a base block and fills hole with nether portal (START HERE)
+ void FindAndSetPortalFrame(int X, int Y, int Z, cWorld * a_World)
+ {
+ int MaxY = FindObsidianCeiling(X, Y, Z, a_World); // Get topmost obsidian block as reference for all other checks
+ int X1 = X + 1, Z1 = Z + 1, X2 = X - 1, Z2 = Z - 1; // Duplicate XZ values, add/subtract one as we've checked the original already the line above
+
+ if (MaxY == 0) // Oh noes! Not a portal coordinate :(
+ {
+ return;
+ }
+
+ if (!FindPortalSliceX(X1, X2, Y, Z, MaxY, a_World))
+ {
+ if (!FindPortalSliceZ(X, Y, Z1, Z2, MaxY, a_World))
+ {
+ return; // No eligible portal construct, abort abort abort!!
+ }
+ }
+
+ for (int Height = Y + 1; Height <= MaxY - 1; Height++) // Loop through boundary to set portal blocks
+ {
+ for (int Width = XZM; Width <= XZP; Width++)
+ {
+ if (Dir == 1)
+ {
+ a_World->SetBlock(Width, Height, Z, E_BLOCK_NETHER_PORTAL, Dir);
+ }
+ else
+ {
+ a_World->SetBlock(X, Height, Width, E_BLOCK_NETHER_PORTAL, Dir);
+ }
+ }
+ }
+
+ return;
+ }
+
+ /// Evaluates if coordinates are a portal going XP/XM; returns true if so, and writes boundaries to variable
+ /// Takes coordinates of base block and Y coord of target obsidian ceiling
+ bool FindPortalSliceX(int X1, int X2, int Y, int Z, int MaxY, cWorld * a_World)
+ {
+ Dir = 1; // Set assumed direction (will change if portal turns out to be facing the other direction)
+ bool FoundFrameXP = false, FoundFrameXM = false;
+ for (X1; ((a_World->GetBlock(X1, Y, Z) == E_BLOCK_OBSIDIAN) || (a_World->GetBlock(X1, Y + 1, Z) == E_BLOCK_OBSIDIAN)); X1++) // Check XP for obsidian blocks, exempting corners
+ {
+ int Value = FindObsidianCeiling(X1, Y, Z, a_World, MaxY);
+ int ValueTwo = FindObsidianCeiling(X1, Y + 1, Z, a_World, MaxY); // For corners without obsidian
+ if ((Value == -1) || (ValueTwo == -1)) // FindObsidianCeiling returns -1 upon frame-find
+ {
+ FoundFrameXP = true; // Found a frame border in this direction, proceed in other direction (don't go further)
+ break;
+ }
+ else if ((Value != MaxY) && (ValueTwo != MaxY)) // Make sure that there is a valid portal 'slice'
+ {
+ return false; // Not valid slice, no portal can be formed
+ }
+ } XZM = X1 - 2; // Set boundary of frame interior (hence the -2)
+ for (X2; ((a_World->GetBlock(X2, Y, Z) == E_BLOCK_OBSIDIAN) || (a_World->GetBlock(X2, Y + 1, Z) == E_BLOCK_OBSIDIAN)); X2--) // Go the other direction (XM)
+ {
+ int Value = FindObsidianCeiling(X2, Y, Z, a_World, MaxY);
+ int ValueTwo = FindObsidianCeiling(X2, Y + 1, Z, a_World, MaxY);
+ if ((Value == -1) || (ValueTwo == -1))
+ {
+ FoundFrameXM = true;
+ break;
+ }
+ else if ((Value != MaxY) && (ValueTwo != MaxY))
+ {
+ return false;
+ }
+ } XZP = X2 + 2; // Set boundary, see previous
+ return (FoundFrameXP && FoundFrameXM);
+ }
+
+ /// Evaluates if coords are a portal going ZP/ZM; returns true if so, and writes boundaries to variable
+ bool FindPortalSliceZ(int X, int Y, int Z1, int Z2, int MaxY, cWorld * a_World)
+ {
+ Dir = 2;
+ bool FoundFrameZP = false, FoundFrameZM = false;
+ for (Z1; ((a_World->GetBlock(X, Y, Z1) == E_BLOCK_OBSIDIAN) || (a_World->GetBlock(X, Y + 1, Z1) == E_BLOCK_OBSIDIAN)); Z1++)
+ {
+ int Value = FindObsidianCeiling(X, Y, Z1, a_World, MaxY);
+ int ValueTwo = FindObsidianCeiling(X, Y + 1, Z1, a_World, MaxY);
+ if ((Value == -1) || (ValueTwo == -1))
+ {
+ FoundFrameZP = true;
+ continue;
+ }
+ else if ((Value != MaxY) && (ValueTwo != MaxY))
+ {
+ return false;
+ }
+ } XZP = Z1 - 2;
+ for (Z2; ((a_World->GetBlock(X, Y, Z2) == E_BLOCK_OBSIDIAN) || (a_World->GetBlock(X, Y + 1, Z2) == E_BLOCK_OBSIDIAN)); Z2--)
+ {
+ int Value = FindObsidianCeiling(X, Y, Z2, a_World, MaxY);
+ int ValueTwo = FindObsidianCeiling(X, Y + 1, Z2, a_World, MaxY);
+ if ((Value == -1) || (ValueTwo == -1))
+ {
+ FoundFrameZM = true;
+ continue;
+ }
+ else if ((Value != MaxY) && (ValueTwo != MaxY))
+ {
+ return false;
+ }
+ } XZM = Z2 + 2;
+ return (FoundFrameZP && FoundFrameZM);
+ }
+};