From 1b833a86102981ce178119fc3526f354b7622170 Mon Sep 17 00:00:00 2001
From: jbzdarkid <jbzdarkid@gmail.com>
Date: Thu, 14 Nov 2019 09:08:35 -0800
Subject: small changes

---
 Source/Randomizer2.cpp | 187 +++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 150 insertions(+), 37 deletions(-)

(limited to 'Source/Randomizer2.cpp')

diff --git a/Source/Randomizer2.cpp b/Source/Randomizer2.cpp
index fcfec9a..537c30b 100644
--- a/Source/Randomizer2.cpp
+++ b/Source/Randomizer2.cpp
@@ -2,6 +2,38 @@
 #include "Puzzle.h"
 #include "Random.h"
 #include "Solver.h"
+#include "Memory.h"
+
+void FloodFillInternal(const Puzzle& p, std::vector<std::vector<bool>>& reached, int x, int y) {
+    if (x%2 == 1 && y%2 == 1) return;
+    auto cell = p.GetCell(x, y);
+    if (cell.undefined) return;
+    if (cell.gap != Cell::Gap::NONE) return;
+    if (reached[x][y]) return;
+
+    reached[x][y] = true;
+    FloodFillInternal(p, reached, x-1, y);
+    FloodFillInternal(p, reached, x+1, y);
+    FloodFillInternal(p, reached, x, y-1);
+    FloodFillInternal(p, reached, x, y+1);
+}
+
+// Returns true: All nodes reachable / false: Some node disconnected
+bool FloodFill(const Puzzle& p) {
+    std::vector<std::vector<bool>> reached;
+    reached.resize(p.width);
+    for (int x=0; x<p.width; x++) reached[x].resize(p.height);
+    FloodFillInternal(p, reached, 0, 0);
+
+    for (int x=0; x<p.width; x++) {
+        for (int y=0; y<p.height; y++) {
+            if (x%2 == 0 && y%2 == 0) { // @Specialized
+                if (!reached[x][y]) return false;
+            }
+        }
+    }
+    return true;
+}
 
 Randomizer2::Randomizer2(const std::shared_ptr<Memory>& memory) : _memory(memory) {}
 
@@ -12,9 +44,7 @@ void Randomizer2::Randomize() {
     // end (x=8, y=0) Up
     // 1 solution
     Puzzle p;
-    int attemptCount = 0;
     while (true) {
-        attemptCount++;
         p.NewGrid(4, 4);
 
         std::vector<Pos> corners;
@@ -29,40 +59,34 @@ void Randomizer2::Randomize() {
         }
 
         for (int i=0; i<14; i++) {
-            int edge = Random::RandInt(0, static_cast<int>(edges.size() - 1));
-            Pos pos = edges[edge];
-            p.grid[pos.x][pos.y].gap = Cell::Gap::FULL;
-            edges.erase(edges.begin() + edge);
+            for (int j=0; j<edges.size(); j++) {
+                int edge = Random::RandInt(0, static_cast<int>(edges.size() - 1));
+                Pos pos = edges[edge];
+                p.grid[pos.x][pos.y].gap = Cell::Gap::FULL;
+                edges.erase(edges.begin() + edge);
+
+                if (FloodFill(p)) {
+                    break;
+                } else {
+                    p.grid[pos.x][pos.y].gap = Cell::Gap::NONE;
+                }
+            }
         }
 
         p.grid[0][8].start = true;
         p.grid[8][0].end = Cell::Dir::UP;
 
         auto solutions = Solver::Solve(p);
-        if (solutions.size() == 1) {
-            auto solution = solutions[0];
-            int solutionLength = 0;
-            for (int x=0; x<solution.width; x++) {
-                for (int y=0; y<solution.height; y++) {
-                    if (solution.grid[x][y].color == Cell::Color::BLACK) solutionLength++;
-                }
-            }
-            if (solutionLength == 25) break;
-        }
+        if (solutions.size() > 0) break;
     }
     PuzzleSerializer(_memory).WritePuzzle(p, 0x293);
 
-
-
-
     // 7x7
     // 35 gaps
     // start (x=8, y=8)
     // end (x=4, y=0) Up
     // 2 solutions, 37 & 39
-    attemptCount = 0;
     while (true) {
-        attemptCount++;
         p.NewGrid(7, 7);
 
         std::vector<Pos> corners;
@@ -77,28 +101,117 @@ void Randomizer2::Randomize() {
         }
 
         for (int i=0; i<35; i++) {
-            int edge = Random::RandInt(0, static_cast<int>(edges.size() - 1));
-            Pos pos = edges[edge];
-            p.grid[pos.x][pos.y].gap = Cell::Gap::FULL;
-            edges.erase(edges.begin() + edge);
+            for (int j=0; j<edges.size(); j++) {
+                // TODO: Precompute edge weights and make a weighted cut.
+                // This will also preclude the need for flood filling.
+                // https://en.wikipedia.org/wiki/Biconnected_component
+
+                int edge = Random::RandInt(0, static_cast<int>(edges.size() - 1));
+                Pos pos = edges[edge];
+                p.grid[pos.x][pos.y].gap = Cell::Gap::FULL;
+                edges.erase(edges.begin() + edge);
+                
+                if (FloodFill(p)) {
+                    break;
+                } else {
+                    p.grid[pos.x][pos.y].gap = Cell::Gap::NONE;
+                }
+            }
         }
 
-        p.grid[8][8].start = true;
-        p.grid[4][0].end = Cell::Dir::UP;
+        switch (Random::RandInt(1, 4)) {
+            case 1:
+                p.grid[Random::RandInt(0, p.width-1)][0].end = Cell::Dir::UP;
+                break;
+            case 2:
+                p.grid[Random::RandInt(0, p.width-1)][p.height-1].end = Cell::Dir::DOWN;
+                break;
+            case 3:
+                p.grid[0][Random::RandInt(0, p.height-1)].end = Cell::Dir::LEFT;
+                break;
+            case 4:
+                p.grid[p.width-1][Random::RandInt(0, p.height-1)].end = Cell::Dir::RIGHT;
+                break;
+        }
+        switch (Random::RandInt(1, 3)) {
+            case 1: // Horiz (6) [5/7][4/6/8]
+                p.grid[Random::RandInt(0, 1)*2 + 5][Random::RandInt(0, 2)*2 + 4].start = true;
+                break;
+            case 2: // Verti (6) [4/6/8][5/7]
+                p.grid[Random::RandInt(0, 2)*2 + 4][Random::RandInt(0, 1)*2 + 5].start = true;
+                break;
+            case 3: // Inter (9) [4/6/8][4/6/8]
+                p.grid[Random::RandInt(0, 2)*2 + 4][Random::RandInt(0, 2)*2 + 4].start = true;
+                break;
+        }
 
         auto solutions = Solver::Solve(p);
         if (solutions.size() > 0) break;
-        if (solutions.size() > 0 && solutions.size() < 5) {
-            auto solution = solutions[0];
-            int solutionLength = 0;
-            for (int x=0; x<solution.width; x++) {
-                for (int y=0; y<solution.height; y++) {
-                    if (solution.grid[x][y].color == Cell::Color::BLACK) solutionLength++;
-                }
-            }
-            if (solutionLength > 30 && solutionLength < 40) break;
-        }
     }
     PuzzleSerializer(_memory).WritePuzzle(p, 0x295);
 
 }
+
+void Randomizer2::RandomizeKeep() {
+    Puzzle p;
+    p.width = 9;
+    p.height = 10;
+    p.grid.clear();
+    p.grid.resize(p.width);
+    for (int x=0; x<p.width; x++) p.grid[x].resize(p.height);
+
+    p.NewGrid(5, 5);
+    p.grid[2][1].gap = Cell::Gap::FULL;
+    p.grid[4][1].gap = Cell::Gap::FULL;
+    p.grid[6][1].gap = Cell::Gap::FULL;
+    p.grid[8][1].gap = Cell::Gap::FULL;
+    p.grid[3][2].gap = Cell::Gap::FULL;
+    p.grid[5][2].gap = Cell::Gap::FULL;
+    p.grid[8][3].gap = Cell::Gap::FULL;
+    p.grid[2][5].gap = Cell::Gap::FULL;
+    p.grid[6][5].gap = Cell::Gap::FULL;
+    p.grid[7][6].gap = Cell::Gap::FULL;
+    p.grid[2][7].gap = Cell::Gap::FULL;
+    p.grid[4][7].gap = Cell::Gap::FULL;
+    p.grid[0][9].gap = Cell::Gap::FULL;
+    p.grid[2][9].gap = Cell::Gap::FULL;
+    p.grid[6][9].gap = Cell::Gap::FULL;
+    p.grid[8][9].gap = Cell::Gap::FULL;
+
+    p.grid[8][0].end = Cell::Dir::UP;
+    p.grid[4][9].start = true;
+
+    // 0x00496
+    // 0x00344
+    // 0x00495
+    // 0x00488
+    // 0x00489
+
+    SetGate(0x00496, 2, 1);
+}
+
+void Randomizer2::SetGate(int panel, int X, int Y) {
+    // x: (-1.5)X + (0.7)Y + 67.1
+    // y: (0.3)X + (1.5)Y + 106.9
+    // z: -19.1
+    // Horizontal: (0, 0, -.1, 1)
+    // Vertical: (0, 0, -.77, .63)
+
+    float x = -1.5f * X + 0.7f * Y +  67.1f;
+    float y =  0.3f * X + 1.5f * Y + 106.9f;
+    _memory->WritePanelData<float>(panel, POSITION, {x, y, 19.1f});
+
+    float z, w;
+    if (X%2 == 0 && Y%2 == 1) { // Horizontal
+        z = -0.1f;
+        w = 1.0f;
+    } else if (X%2 == 1 && Y%2 == 0) { // Vertical
+        z = -.77f;
+        w = .63f;
+    } else {
+        assert(false);
+        return;
+    }
+
+    _memory->WritePanelData<float>(panel, ORIENTATION, {0.0f, 0.0f, z, w});
+}
\ No newline at end of file
-- 
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