Created
February 10, 2018 18:58
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H Tree - Feb. 10, 10 am - code review peer's code
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// | |
class HTree | |
{ | |
public static void DrawHTree (int x, int y, int length, int depth) { | |
if (length == 0) { | |
return; | |
} | |
DrawHTree(x, y, length, depth, 0); | |
} | |
public static void DrawHTree (int x, int y, int length, int depth, int currentDepth) { | |
if (depth == currentDepth) { | |
return; | |
} | |
int halfLength = length / 2; // 1 | |
int xLeft = x - halfLength; // -1 | |
int xRight = x + halfLength; // 1 | |
int yTop = y + halfLength; // 1 | |
int yBottom = y - halfLength; // -1 | |
DrawLine(xLeft, y, xRight, y); // (-1,0) -> (1,0) | |
DrawLine(xLeft, yTop, xLeft, yBottom); // (-1,1) -> (-1,-1) | |
DrawLine(xRight, yTop, xRight, yBottom); // (1, 1) -> (1,-1) | |
int newLength = length / Math.Sqrt(2); | |
currentDepth++; | |
DrawHTree(xLeft, yTop, newLength, currentDepth); // (-1,1) 1 | |
DrawHTree(xLeft, yBottom, newLength, currentDepth); // (-1,-1) 1 | |
DrawHTree(xRight, yTop, newLength, currentDepth); // | |
DrawHTree(xRight, yBottom, newLength, currentDepth); | |
} | |
public static void DrawLine(int x1, int y1, int x2, int y2) { | |
Console.WriteLine("(" + x1 + "," + y1 + ")"); | |
Console.WriteLine("(" + x2 + "," + y2 + ")"); | |
} | |
// if (depth == givenLength) { // 0, 1, 2 | |
//return; | |
//} | |
// halfLength = length / 2 => 1 | |
// (x - halfLength, y) (x + halfLength, y) | |
// (x + halfLength, y + halfLength) (x + halfLength, y - halfLength) | |
// (x - halfLength, y + halfLength) (x - halfLength, y - halfLength) | |
// drawHTree (x + halfLength, y + halfLength, length/Sqrt(2), depth) | |
// drawHTree (x + halfLength, y - halfLength, length/Sqrt(2), depth) | |
//drawHTree (x - halfLength, y + halfLength, length/Sqrt(2), depth) | |
//drawHTree (x - halfLength, y - halfLength, length/Sqrt(2), depth) | |
static void Main() | |
{ | |
System.Console.WriteLine("Practice makes Perfect!"); | |
} | |
} | |
// x, y (0,0) length (2) | |
// if (depth == givenLength) { // 0, 1, 2 | |
//return; | |
//} | |
// halfLength = length / 2 => 1 | |
// (x - halfLength, y) (x + halfLength, y) | |
// (x + halfLength, y + halfLength) (x + halfLength, y - halfLength) | |
// (x - halfLength, y + halfLength) (x - halfLength, y - halfLength) | |
// drawHTree (x + halfLength, y + halfLength, length/Sqrt(2), depth) | |
// drawHTree (x + halfLength, y - halfLength, length/Sqrt(2), depth) | |
//drawHTree (x - halfLength, y + halfLength, length/Sqrt(2), depth) | |
//drawHTree (x - halfLength, y - halfLength, length/Sqrt(2), depth) | |
O(4^d) -> 1 + 4 + 4 * 4 + ... + 4^(depth - 1) = 4^depth - 1 /(4- 1)= O(4^depth) |
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