From 11fabe1f293ecb28ee05d0b11741a506f1be3e0d Mon Sep 17 00:00:00 2001
From: Dejvino <dejvino@gmail.com>
Date: Sat, 28 Feb 2026 19:49:27 +0100
Subject: [PATCH] better grid generator

---
 main.cpp | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/main.cpp b/main.cpp
index c6fd4e5..4c7be0f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -398,6 +398,7 @@ void drawGridCell(SDL_Renderer* renderer, int x, int y, int size, SynthEngine::G
     } else if (cell.type == SynthEngine::GridCell::GATE_INPUT) {
         SDL_Rect box = {cx - r, cy - r, r*2, r*2};
         SDL_RenderDrawRect(renderer, &box);
+        drawDirectionArrow(renderer, cx, cy, size, cell.rotation);
         if (cell.value > 0.5f) SDL_RenderFillRect(renderer, &box);
         drawString(renderer, cx - 8, cy - 5, 12, "G-IN");
         drawTypeLabel(renderer, x, y, 'K');
@@ -738,10 +739,10 @@ void randomizeGrid() {
     }
 
     int attempts = 0;
-    bool inputOscillatorReachable = false;
+    bool validGrid = false;
     bool visited[SynthEngine::GRID_W][SynthEngine::GRID_H];
 
-    while (!inputOscillatorReachable && attempts < 1000) {
+    while (!validGrid && attempts < 1000) {
         attempts++;
 
         // 2. Randomize (without allocation)
@@ -817,20 +818,27 @@ void randomizeGrid() {
             }
         }
 
-        // After BFS, check if an input oscillator is reachable
+        // After BFS, check if requirements are met
+        bool hasSoundSource = false;
+        bool hasGate = false;
         for (int x = 0; x < SynthEngine::GRID_W; ++x) {
             for (int y = 0; y < SynthEngine::GRID_H; ++y) {
-                if (visited[x][y] && engine.grid[x][y].type == SynthEngine::GridCell::INPUT_OSCILLATOR) {
-                    inputOscillatorReachable = true;
-                    break;
+                if (visited[x][y]) {
+                    if (engine.grid[x][y].type == SynthEngine::GridCell::INPUT_OSCILLATOR || 
+                        engine.grid[x][y].type == SynthEngine::GridCell::WAVETABLE) {
+                        hasSoundSource = true;
+                    }
+                    if (engine.grid[x][y].type == SynthEngine::GridCell::GATE_INPUT) {
+                        hasGate = true;
+                    }
                 }
             }
-            if (inputOscillatorReachable) break;
         }
+        validGrid = hasSoundSource && hasGate;
     }
 
     // 4. Prune unreachable elements if a valid grid was found
-    if (inputOscillatorReachable) {
+    if (validGrid) {
         for (int x = 0; x < SynthEngine::GRID_W; ++x) {
             for (int y = 0; y < SynthEngine::GRID_H; ++y) {
                 if (!visited[x][y]) {
@@ -854,7 +862,7 @@ void randomizeGrid() {
         }
     }
     
-    printf("Randomized in %d attempts. Input Osc reachable: %s\n", attempts, inputOscillatorReachable ? "YES" : "NO");
+    printf("Randomized in %d attempts. Valid: %s\n", attempts, validGrid ? "YES" : "NO");
 }
 
 void loadPreset(int preset) {