Update README.md

README.md

@@ -21,4 +21,6 @@ bin/Debug/sandbox
 | Action | Key |
 | ------ | --- |
 | Spawn element | Left click |
-| Change brush | Right click |
+| Change brush | Right click |
+
+![Sandbox2](sandbox.png)

src/cells.c

@@ -40,6 +40,7 @@ void drawGrid(int grid[CELL_AMOUNT][CELL_AMOUNT])
         {
             switch(grid[i][j])
             {
+                /* Cell drawing colors */
                 case VOID:
                     DrawRectangle(CELL_SIZE_PIXELS*j, CELL_SIZE_PIXELS*i, CELL_SIZE_PIXELS, CELL_SIZE_PIXELS, BLACK);
                     break;
@@ -52,6 +53,12 @@ void drawGrid(int grid[CELL_AMOUNT][CELL_AMOUNT])
                 case WATER:
                     DrawRectangle(CELL_SIZE_PIXELS*j, CELL_SIZE_PIXELS*i, CELL_SIZE_PIXELS, CELL_SIZE_PIXELS, BLUE);
                     break;
+                case VIRUS:
+                    DrawRectangle(CELL_SIZE_PIXELS*j, CELL_SIZE_PIXELS*i, CELL_SIZE_PIXELS, CELL_SIZE_PIXELS, VIOLET);
+                    break;
+                case PLANT:
+                    DrawRectangle(CELL_SIZE_PIXELS*j, CELL_SIZE_PIXELS*i, CELL_SIZE_PIXELS, CELL_SIZE_PIXELS, DARKGREEN);
+                    break;
                 default:
                     break;
             }
@@ -90,6 +97,7 @@ void updateGrid(int grid[CELL_AMOUNT][CELL_AMOUNT]) {
     for (int i = CELL_AMOUNT - 1; i >= 0; i--) {
         for (int j = 0; j < CELL_AMOUNT; j++) {
             switch (grid[i][j]) {
+                /* Cell type behavior */
                 case VOID:
                     break;
                 case SAND:
@@ -125,6 +133,42 @@ void updateGrid(int grid[CELL_AMOUNT][CELL_AMOUNT]) {
                         }
                     }
                     break;
+                case VIRUS: /* It should not be too powerful. */
+                    if (i + 1 < CELL_AMOUNT && grid[i+1][j] != VOID && grid[i+1][j] != VIRUS) {
+                        int propagate = rand() % 10 == 0 ? 1 : 0;
+                        if (propagate) grid[i+1][j] = VIRUS;
+                    }
+                    else if (i - 1 >= 0 && grid[i-1][j] != VOID && grid[i-1][j] != VIRUS) {
+                        int propagate = rand() % 10 == 0 ? 1 : 0;
+                        if (propagate) grid[i-1][j] = VIRUS;
+                    }
+                    else if (j+1 < CELL_AMOUNT && grid[i][j+1] != VOID && grid[i][j+1] != VIRUS) {
+                        int propagate = rand() % 10 == 0 ? 1 : 0;
+                        if (propagate) grid[i][j+1] = VIRUS;
+                    }
+                    else if (j-1 >= 0 && grid[i][j-1] != VOID && grid[i][j-1] != VIRUS) {
+                        int propagate = rand() % 10 == 0 ? 1 : 0;
+                        if (propagate) grid[i][j-1] = VIRUS;
+                    }
+                    break;
+                    case PLANT:
+                        if (i+1 < CELL_AMOUNT && grid[i+1][j] == WATER) {
+                            int grow = rand() % 600 == 0 ? 1 : 0;
+                            if (grow) grid[i+1][j] = PLANT;
+                        }
+                        if (i-1 >= 0 && grid[i-1][j] == WATER) {
+                            int grow = rand() % 20 == 0 ? 1 : 0;
+                            if (grow) grid[i-1][j] = PLANT;
+                        }
+                        if (j+1 < CELL_AMOUNT && grid[i][j+1] == WATER) {
+                            int grow = rand() % 600 == 0 ? 1 : 0;
+                            if (grow) grid[i][j+1] = PLANT;
+                        }
+                        if (j-1 >= 0 && grid[i][j-1] == WATER) {
+                            int grow = rand() % 600 == 0 ? 1 : 0;
+                            if (grow) grid[i][j-1] = PLANT;
+                        }
+                        break;
                 default:
                     break;
             }

src/cells.h

@@ -53,6 +53,8 @@ typedef enum CellType
     SAND,
     STONE,
     WATER,
+    VIRUS,
+    PLANT,
     CELL_TYPE_MAX
 } CellType;
 

src/utils.c

@@ -56,6 +56,8 @@ char* enumToString(CellType brush)
         case SAND:  return "Sand";
         case STONE: return "Stone";
         case WATER: return "Water";
+        case VIRUS: return "Virus";
+        case PLANT: return "Plant";
         default:    return "Unknown";
     }
 }