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Setting cocos2D camera position using CCFollow

/ Published in: Objective C
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Use this variation of **setPlayerPosition** in your HelloWorldScene.m file to negate the need to use **setViewpointCenter** to manually calculate the viewport to track your player. This uses the **CCFollow** function as demonstrated in ActionsTest, one of the test apps included with cocos2D. Also to note is that the player movement is controlled by **CCMoveTo** which gives the player the same smooth movement around the map that the enemies have.

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  1. -(void)setPlayerPosition:(CGPoint)position {
  2. 	CGPoint tileCoord = [self tileCoordForPosition:position];
  3. 	int tileGid = [_meta tileGIDAt:tileCoord];
  4. 	if (tileGid) {
  5. 		NSDictionary *properties = [_tileMap propertiesForGID:tileGid];
  6. 		if (properties) {
  7. 			NSString *collision = [properties valueForKey:@"Collidable"];
  8. 			if (collision && [collision compare:@"True"] == NSOrderedSame) {
  9. 				return;
  10. 			}
  11. 			NSString *collectable = [properties valueForKey:@"Collectable"];
  12. 			if (collectable && [collectable compare:@"True"] == NSOrderedSame) {
  13. 				[_meta removeTileAt:tileCoord];
  14. 				[_foreground removeTileAt:tileCoord];
  15. 				self.numCollected++;
  16. 				[_hud numCollectedChanged:_numCollected];
  17. 			}
  18. 		}
  19. 	}
  20.  
  21. 	ccTime moveDuration = 0.3;
  22. 	id playerMove = [CCMoveTo actionWithDuration:moveDuration position:position];
  23. 	id cameraMove = [CCFollow actionWithTarget:_player worldBoundary:CGRectMake(0, 0, (_tileMap.mapSize.width * _tileMap.tileSize.width), (_tileMap.mapSize.height * _tileMap.mapSize.height))];
  24. 	[_player runAction:playerMove];
  25.  
  26. 	[self runAction:cameraMove];
  27.  
  28. }

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