TCo*_*der 5 c++ recursion volume
So I have an assignment where I have to recreate a 3d chessboard that is a RxC grid of squares each being a different height. If the chessboard is water tight, and someone pours water all over it until it can hold no more water, it will hold a fixed amount of water. If the board is already holding its maximum volume of water, any excess water poured onto the board will drain off the edges, there is no tall container surrounding the board. You can assume the squares on the chess board are one inch square, and the heights are given in inches.
int CalcContainedWater( const int *p_data, int num_columns, int num_rows )
p_data指向连续二维,有符号整数的行主要数组的第一个元素的指针在哪里.您的功能将针对不同形状和内容的电路板的参考实现进行测试,以确定其正确性.
请记住,内部的值p_data可以保持高度的正值和负值.
例如:
A)以下板块产生3的遏制.
1, 1, 1, 1, 1,
1, 0, 0, 0, 1,
1, 1, 1, 1, 1,
B)以下板产生0的遏制.
1, 0, 1,
1, 0, 1,
1, 1, 1,
C)以下板产生1的遏制.
0, 1, 0,
1, 0, 1,
0, 1, 0,
这是我到目前为止:
#include "stdafx.h"
#include <queue>
#include <vector>
using namespace std;
enum GridPosition
{
TOP_LEFT_CORNER,
TOP_RIGHT_CORNER,
BOTTOM_LEFT_CORNER,
BOTTOM_RIGHT_CORNER,
TOP_ROW,
BOTTOM_ROW,
LEFT_COLUMN,
RIGHT_COLUMN,
FREE,
};
struct Square
{
int nHeight;
int nPos;
GridPosition gPos;
bool bIsVisited;
bool bIsFenced;
bool bIsFlooding;
Square(){ nHeight = 0; nPos = 0; gPos = FREE; bIsVisited = false; bIsFenced = false; bIsFlooding = false;};
~Square(){};
Square( int Height, int Pos, GridPosition GridPos, bool Visited, bool Fenced, bool Flooding)
{
nHeight = Height;
nPos = Pos;
gPos = GridPos;
bIsVisited = Visited;
bIsFenced = Fenced;
bIsFlooding = Flooding;
}
};
template< typename FirstType, typename SecondType >
struct PairComparator
{
bool operator()( const pair<FirstType, SecondType>& p1,
const pair<FirstType, SecondType>& p2 ) const
{
return p1.second > p2.second;
}
};
int CalcContainedWater( const int *p_data, int num_columns, int num_rows );
int CalcContainedWater( const int *p_data, int num_columns, int num_rows )
{
priority_queue<pair<int,int>, vector<pair<int,int>>, PairComparator<int,int>> qPerimeter;
queue<pair<int,int>> qFlooding;
vector<Square> vSquareVec(num_columns * num_rows);
int nTotalContained = 0;
int nCurrentSqHeight = 0;
int nCurrWaterLvl = 0;
int nDepth = 1;
for( int nRow = 0; nRow < num_rows; ++nRow)
{
for( int nColumn = 0; nColumn < num_columns; ++ nColumn)
{
int nCurrArrayPoint = nRow * num_columns + nColumn;
nCurrentSqHeight = p_data[nCurrArrayPoint];
Square sSquare(nCurrentSqHeight, nCurrArrayPoint, FREE, false,false,false);
if(nRow == 0 && nColumn == 0)
sSquare.gPos = TOP_LEFT_CORNER;
else if(nRow == 0 && nColumn == num_columns - 1)
sSquare.gPos = TOP_RIGHT_CORNER;
else if(nRow == num_rows - 1 && nColumn == 0)
sSquare.gPos = BOTTOM_LEFT_CORNER;
else if(nRow == num_rows - 1 && nColumn == num_columns - 1)
sSquare.gPos = BOTTOM_RIGHT_CORNER;
else if( nRow == 0)
sSquare.gPos = TOP_ROW;
else if( nRow == num_rows -1 )
sSquare.gPos = BOTTOM_ROW;
else if( nColumn == 0)
sSquare.gPos = LEFT_COLUMN;
else if( nColumn == num_columns - 1)
sSquare.gPos = RIGHT_COLUMN;
vSquareVec[nCurrArrayPoint] = sSquare;
if( nRow == 0 || nColumn == 0 ||
nColumn == num_columns - 1 || nRow == num_rows -1 )
{
sSquare.bIsFenced = true;
vSquareVec[nCurrArrayPoint] = sSquare;
pair<int,int> p1(nCurrArrayPoint, nCurrentSqHeight);
qPerimeter.push(p1);
}
}
}
nCurrWaterLvl = qPerimeter.top().second;
while( !qPerimeter.empty() )
{
pair<int,int> PerimPos = qPerimeter.top();
qPerimeter.pop();
if( !vSquareVec[PerimPos.first].bIsVisited )
{
if( vSquareVec[PerimPos.first].nHeight > nCurrWaterLvl )
nCurrWaterLvl = vSquareVec[PerimPos.first].nHeight;
vSquareVec[PerimPos.first].bIsFlooding = true;
qFlooding.push(PerimPos);
while( !qFlooding.empty() )
{
pair<int,int> FloodPos = qFlooding.front();
qFlooding.pop();
nDepth = nCurrWaterLvl - vSquareVec[FloodPos.first].nHeight;
if( nDepth >= 0)
{
vSquareVec[FloodPos.first].bIsVisited = true;
pair<int,int> newFloodPos;
switch(vSquareVec[FloodPos.first].gPos)
{
case TOP_LEFT_CORNER:
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case TOP_RIGHT_CORNER:
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case BOTTOM_LEFT_CORNER:
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case BOTTOM_RIGHT_CORNER:
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case TOP_ROW:
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case BOTTOM_ROW:
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case LEFT_COLUMN:
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case RIGHT_COLUMN:
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1 ].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
break;
case FREE:
if( !vSquareVec[FloodPos.first + 1].bIsVisited &&
!vSquareVec[FloodPos.first + 1].bIsFlooding)
{
vSquareVec[FloodPos.first + 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - 1].bIsVisited &&
!vSquareVec[FloodPos.first - 1].bIsFlooding)
{
vSquareVec[FloodPos.first - 1].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - 1].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - 1].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first + num_rows].bIsVisited &&
!vSquareVec[FloodPos.first + num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first + num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first + num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first + num_rows].nHeight;
qFlooding.push(newFloodPos);
}
if( !vSquareVec[FloodPos.first - num_rows].bIsVisited &&
!vSquareVec[FloodPos.first - num_rows].bIsFlooding)
{
vSquareVec[FloodPos.first - num_rows].bIsFlooding = true;
newFloodPos.first = vSquareVec[FloodPos.first - num_rows].nPos;
newFloodPos.second = vSquareVec[FloodPos.first - num_rows].nHeight;
qFlooding.push(newFloodPos);
}
nTotalContained += nDepth;
break;
}
}
else
{
vSquareVec[FloodPos.first].bIsFlooding = false;
if( !vSquareVec[FloodPos.first].bIsFenced )
{
vSquareVec[FloodPos.first].bIsFenced = true;
qPerimeter.push(FloodPos);
}
}
}
}
}
return nTotalContained;
}
我所发现的只是顶部,底部,左侧和右侧的高度.
Currently I'm stuck trying to figure out out how to get the total volume knowing that water will spill over to squares if they are smaller in height. The more that I look at this the more I think that it should be done recursively but can't find a way to implement it.
Any help would be much appreciated. Not looking for the answer just for a push into the right direction into what I need to do.
这不仅仅需要计算体积。
根据您发布的示例，您首先要测试遏制性，然后担心容器的体积。
我建议确定棋盘中是否存在闭合多边形。
如果多边形是封闭的，则确定其面积。
用于体积计算的高度将是所有边界墙的最小高度。
最后，体积将是最小高度乘以多边形的面积。
在网络上研究基于顶点或线段向量确定闭合多边形的算法。