Terraria.WaterfallManager.FindWaterfalls C# (CSharp) Method

        public void FindWaterfalls(bool forced = false)
        {
            ++this.findWaterfallCount;
            if (this.findWaterfallCount < 30 && !forced)
                return;
            this.findWaterfallCount = 0;
            this.waterfallDist = (int)(75.0 * (double)Main.gfxQuality) + 25;
            this.qualityMax = (int)(175.0 * (double)Main.gfxQuality) + 25;
            this.currentMax = 0;
            int num1 = (int)((double)Main.screenPosition.X / 16.0 - 1.0);
            int num2 = (int)(((double)Main.screenPosition.X + (double)Main.screenWidth) / 16.0) + 2;
            int num3 = (int)((double)Main.screenPosition.Y / 16.0 - 1.0);
            int num4 = (int)(((double)Main.screenPosition.Y + (double)Main.screenHeight) / 16.0) + 2;
            int num5 = num1 - this.waterfallDist;
            int num6 = num2 + this.waterfallDist;
            int num7 = num3 - this.waterfallDist;
            int num8 = num4 + 20;
            if (num5 < 0)
                num5 = 0;
            if (num6 > Main.maxTilesX)
                num6 = Main.maxTilesX;
            if (num7 < 0)
                num7 = 0;
            if (num8 > Main.maxTilesY)
                num8 = Main.maxTilesY;
            for (int index1 = num5; index1 < num6; ++index1)
            {
                for (int index2 = num7; index2 < num8; ++index2)
                {
                    Tile tile = Main.tile[index1, index2];
                    if (tile == null)
                    {
                        tile = new Tile();
                        Main.tile[index1, index2] = tile;
                    }
                    if (tile.active())
                    {
                        if (tile.halfBrick())
                        {
                            Tile testTile1 = Main.tile[index1, index2 - 1];
                            if (testTile1 == null)
                            {
                                testTile1 = new Tile();
                                Main.tile[index1, index2 - 1] = testTile1;
                            }
                            if ((int)testTile1.liquid < 16 || WorldGen.SolidTile(testTile1))
                            {
                                Tile testTile2 = Main.tile[index1 + 1, index2];
                                if (testTile2 == null)
                                {
                                    testTile2 = new Tile();
                                    Main.tile[index1 - 1, index2] = testTile2;
                                }
                                Tile testTile3 = Main.tile[index1 - 1, index2];
                                if (testTile3 == null)
                                {
                                    testTile3 = new Tile();
                                    Main.tile[index1 + 1, index2] = testTile3;
                                }
                                if (((int)testTile2.liquid > 160 || (int)testTile3.liquid > 160) && ((int)testTile2.liquid == 0 && !WorldGen.SolidTile(testTile2) && (int)testTile2.slope() == 0 || (int)testTile3.liquid == 0 && !WorldGen.SolidTile(testTile3) && (int)testTile3.slope() == 0) && this.currentMax < this.qualityMax)
                                {
                                    this.waterfalls[this.currentMax].type = 0;
                                    this.waterfalls[this.currentMax].type = testTile1.lava() || testTile3.lava() || testTile2.lava() ? 1 : (testTile1.honey() || testTile3.honey() || testTile2.honey() ? 14 : 0);
                                    this.waterfalls[this.currentMax].x = index1;
                                    this.waterfalls[this.currentMax].y = index2;
                                    ++this.currentMax;
                                }
                            }
                        }
                        if ((int)tile.type == 196)
                        {
                            Tile testTile = Main.tile[index1, index2 + 1];
                            if (testTile == null)
                            {
                                testTile = new Tile();
                                Main.tile[index1, index2 + 1] = testTile;
                            }
                            if (!WorldGen.SolidTile(testTile) && (int)testTile.slope() == 0 && this.currentMax < this.qualityMax)
                            {
                                this.waterfalls[this.currentMax].type = 11;
                                this.waterfalls[this.currentMax].x = index1;
                                this.waterfalls[this.currentMax].y = index2 + 1;
                                ++this.currentMax;
                            }
                        }
                    }
                }
            }
        }