Here is my question:
- How can I convert an
SKSpriteNodearray into an array ofGKObstaclesso that an agent can appropriately avoid these obstacles by using thegoalToAvoidObstacles:(nonnull NSArray<GKObstacle *> *) maxPredictionTime:(NSTimeInterval)/?
It seems that the way in which I am creating the GKObstacle array is not allowing the GKGoal to identify these as obstacles correctly, no matter what weight I give to the goal.
I have currently several SKNodes that are added to an SKScene chapterScene. Each of these nodes are added to an array that I am storing called obstaclesArray. I have set up a test in the following way that works quite well:
WORKING OBSTACLES
- (void)didMoveToView:(nonnull SKView *)view {
[super didMoveToView:view];
// Add three obstacles in a triangle formation around the center of the scene.
NSArray<GKObstacle *> *obstacles = @[
[self addObstacleAtPoint:CGPointMake(CGRectGetMidX(self.frame),
CGRectGetMidY(self.frame) + 150)],
[self addObstacleAtPoint:CGPointMake(CGRectGetMidX(self.frame) - 200,
CGRectGetMidY(self.frame) - 150)],
[self addObstacleAtPoint:CGPointMake(CGRectGetMidX(self.frame) + 200,
CGRectGetMidY(self.frame) - 150)],
];
// The player agent follows the tracking agent.
self.player = [[OPlayer alloc] initWithScene:self
radius:50
position:CGPointMake(CGRectGetMidX(self.frame),
CGRectGetMidY(self.frame))];
self.player.agent.behavior = [[GKBehavior alloc] init];
[self.agentSystem addComponent:self.player.agent];
// Create the seek goal, but add it to the behavior only in -setSeeking:.
self.seekGoal = [GKGoal goalToSeekAgent:self.character];
// Add an avoid-obstacles goal with a high weight to keep the agent from overlapping the obstacles.
[self.player.agent.behavior setWeight:100 forGoal:[GKGoal goalToAvoidObstacles:obstacles maxPredictionTime:1]];
}
- (GKObstacle *)addObstacleAtPoint:(CGPoint)point {
SKShapeNode *circleShape = [SKShapeNode shapeNodeWithCircleOfRadius:50];
circleShape.lineWidth = 2.5;
circleShape.fillColor = [SKColor grayColor];
circleShape.strokeColor = [SKColor redColor];
circleShape.zPosition = 1;
circleShape.position = point;
[self addChild:circleShape];
GKCircleObstacle *obstacle = [GKCircleObstacle obstacleWithRadius:50];
obstacle.position = (vector_float2){point.x, point.y};
return obstacle;
}
While this works just fine, the issue I am having is that I can not get the behavior to identify the SKNode bodies array that I have as obstacles. I can only get these manually created GKCircleObstacle items to register as valid obstacles that the agent avoids. The reason this is an issue is because I am relying on many obstacles that are not in fact simple circles, but polygon structures some complex, some more straightforward. Nevertheless, I was attempting the following but my agent did not seem to avoid any of the obstacles that are of SKNode this way:
NOT WORKING OBSTACLES
NSArray *obstacles = [SKNode obstaclesFromNodePhysicsBodies:obstaclesArray];
/*
The other code seen above
*/
// Add an avoid-obstacles goal with a high weight to keep the agent from overlapping the obstacles.
[self.player.agent.behavior setWeight:100 forGoal:[GKGoal goalToAvoidObstacles:obstacles maxPredictionTime:1]];
Unfortunately, this does not seem to work as no matter how high I set the weight to, the agent never responds to avoiding the obstacles. Here is a log of the array I am passing to it:
2016-07-24 22:32:24.907 <GAME>[1516:475581] obstacles: (
"<GKPolygonObstacle: 0x14d20d70>",
"<GKPolygonObstacle: 0x14d20e10>",
"<GKPolygonObstacle: 0x14d20ba0>",
"<GKPolygonObstacle: 0x14d20bb0>",
"<GKPolygonObstacle: 0x14d20bc0>",
"<GKPolygonObstacle: 0x14d20a60>",
"<GKPolygonObstacle: 0x14d208b0>",
"<GKPolygonObstacle: 0x14d207d0>",
"<GKPolygonObstacle: 0x14d20a70>"
)
Each of which have all been clearly and appropriately initialized and added to the scene. Each of these elements are in fact responsive with the SpriteKit didBeginContact:(SKPhysicsContact *)contact method, so it seems that the nodes are properly handing the boundaries that they should be having.
If someone knows what I am doing wrong or a better way to turn each of these 'obstacle nodes' into GKObstacle's I would be much appreciative. Thanks in advance!
UPDATE: Here is a node with a physics body that I am testing:
SKSpriteNode *innerMap1 = [SKSpriteNode spriteNodeWithImageNamed:@"test"];
innerMap1.physicsBody = [SKPhysicsBody bodyWithTexture:[SKTexture textureWithImageNamed:@"test"] size:CGSizeMake(innerMap1.frame.size.width*0.92, innerMap1.frame.size.height*0.92)];
innerMap1.position = CGPointMake(-220, -140);
innerMap1.physicsBody.dynamic = NO;
[chapterSKSpriteNodes addObject:innerMap1];
Here is what the body looks like with skView.showsPhysics = YES;:
So I know that the physics body is what I need it to be. When I attempt to create the GKObstacle from this body however, it does not seem to register as an obstacle when being assigned in the avoidObstacles goal.
