Block gravity and collision handling.

src/sig/BlockClump.java

@@ -1,6 +1,7 @@
 package sig;
 
 import java.awt.Graphics;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -9,7 +10,11 @@ public class BlockClump {
     double x,y; //the lower-left origin of this block clump. Every block positions relative to this.
     double yspd;
     int[][] collisionColumnRanges;
+    boolean launched=false; //Blocks do not fall when landing (by gravity).
+    boolean re_sort=false; //Set to true when block clumps are divided into smaller columns for re-sorting.
     public BlockClump(List<Block> blockList, double x, double y, double startspd, int width) {
+    	this.blocks = new ArrayList<Block>();
+    	this.blocks.addAll(blockList);
         collisionColumnRanges = new int[width][];
 
         for (int i=0;i<width;i++) {
@@ -20,6 +25,7 @@ public class BlockClump {
         this.x=x;
         this.y=y;
         this.yspd=startspd;
+        System.out.println(Arrays.deepToString(collisionColumnRanges));
     }
     public void updateBlockCollision() {
         //Call this whenever the block structure changes. This will define what the top and bottom positions
@@ -44,7 +50,7 @@ public class BlockClump {
     private void updateBlockCollisionRangeWithBlock(Block b) {
         if (collisionColumnRanges[b.x][0]==-1||collisionColumnRanges[b.x][0]>b.y) {
             collisionColumnRanges[b.x][0]=b.y;
-        } else
+        }
         if (collisionColumnRanges[b.x][1]==-1||collisionColumnRanges[b.x][1]<b.y) {
             collisionColumnRanges[b.x][1]=b.y;
         }

src/sig/Board.java

@@ -3,6 +3,7 @@ package sig;
 import java.awt.Graphics;
 import java.awt.Color;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 public class Board {
@@ -34,25 +35,68 @@ public class Board {
 
         List<Block> initialBlocks = new ArrayList<Block>();
         for (int x=0;x<boardWidth;x++) {
-            for (int y=0;y<3;y++) {
-                initialBlocks.add(new Block(x,y));
+            for (int y=0;y<(int)(Math.random()*12);y++) {
+            	initialBlocks.add(new Block(x,y));
             }
         }
 
         BlockClump defaultClump = new BlockClump(initialBlocks,0,260,0,width);
+        
+        List<Block> initialBlocks2 = new ArrayList<Block>();
+        for (int x=0;x<boardWidth;x++) {
+            for (int y=0;y<(int)(Math.random()*12);y++) {
+            	initialBlocks2.add(new Block(x,y));
+            }
+        }
+        BlockClump defaultClump2 = new BlockClump(initialBlocks2,0,540,0,width);
 
         blockData.add(defaultClump);
+        blockData.add(defaultClump2);
     }
-    public void run() {
+    public void run(long frames) {
+    	
+    	if (frames%100==0) {
+    		blockData.add(new BlockClump(Arrays.asList(new Block((int)(Math.random()*width),0)),0,590,0,width));
+    	}
+    	
         for (BlockClump blocks : blockData) {
-            if (blocks.y+blocks.yspd+gravity>0) {
-                blocks.yspd=Math.max(blocks.yspd+gravity,max_fall_spd);
-                blocks.y+=blocks.yspd;
-            } else {
-                //We have hit the bottom.
-                blocks.yspd=0;
-                blocks.y=0;
-            }
+        	double FUTURE_FALL_POSITION = blocks.y+blocks.yspd+gravity;
+        	boolean landed=false;
+        	outerloop:
+        	for (int x=0;x<width;x++) {
+        		if (blocks.collisionColumnRanges[x][0]!=-1) {
+        			for (BlockClump blocks2 : blockData) {
+        				if (!blocks.equals(blocks2)&&blocks2.collisionColumnRanges[x][1]!=-1) {
+        					if (FUTURE_FALL_POSITION<blocks2.y) {
+	        					if (FUTURE_FALL_POSITION+blocks.collisionColumnRanges[x][1]*block_height>blocks2.y+(blocks2.collisionColumnRanges[x][0]+1)*block_height) {
+	        						blocks.yspd=0;
+	        						blocks.y=blocks2.y+(blocks2.collisionColumnRanges[x][0]+1)*block_height;
+	        						landed=true;
+	        						break outerloop;
+	        					}
+        					} else {
+        						if (FUTURE_FALL_POSITION+blocks.collisionColumnRanges[x][0]*block_height<blocks2.y+(blocks2.collisionColumnRanges[x][1]+1)*block_height) {
+	        						blocks.yspd=0;
+	        						blocks.y=blocks2.y+(blocks2.collisionColumnRanges[x][1]+1)*block_height;
+	        						landed=true;
+	        						break outerloop;
+	        					}
+        					}
+        				}
+        			}
+        		}
+        	}
+	        if (!landed) {
+	            if (FUTURE_FALL_POSITION>0) {
+	                blocks.yspd=Math.max(blocks.yspd+gravity,max_fall_spd);
+	                blocks.y+=blocks.yspd;
+	            } else {
+	                //We have hit the bottom.
+	                blocks.yspd=0;
+	                blocks.y=0;
+	            }
+        	}
+	        //System.out.println(blocks.y);
         }
     }
     public void drawBoard(Graphics g) {

src/sig/Meteo.java

@@ -15,12 +15,12 @@ public class Meteo {
 
     public static void runGameLoop() {
         FRAMECOUNT++;
-        b.run();
+        b.run(FRAMECOUNT);
     }
 
     public static void main(String[] args) {
         double[] val = {0,0,};
-        b = new Board(SCREEN_WIDTH/2,SCREEN_HEIGHT/2,16,16,8,14,-0.065,1,4,-2,val);
+        b = new Board(SCREEN_WIDTH/2,SCREEN_HEIGHT/2,24,24,8,14,-0.065,1,4,-2,val);
 
         JFrame f = new JFrame("Meteo Engine");
         Panel p = new Panel();