Question

嗨我想在我的游戏上有一个选择框。我认为使用'SpriteKit'叠加制作是最简单的方法但有没有任何API可以检测'SKShapeNode'的交集和'SCNNode'（忽略Z轴的路径）？

我尝试做了什么： _unitsArray是一个SCNNodes数组，我希望它们在SKScene

中包含方框

                   for (SCNNode * node in _unitsArray)
                   {
                       SCNVector3 min = SCNVector3Zero;
                       SCNVector3 max = SCNVector3Zero;

                       [node getBoundingBoxMin:&min max:&max];

                       NSLog(@"Min Before %lf, %lf, %lf", min.x, min.y, min.z);
                       NSLog(@"Max Before %lf, %lf, %lf", max.x, max.y, max.z);


                       min = vector3Multiply(min, node.scale);
                       max = vector3Multiply(max, node.scale);


                       //Lets Get Nodes's Position
                       SCNVector3 position = node.position;
                       NSLog(@"Position =  %lf, %lf, %lf", position.x, position.y, position.z);

                       SCNView * view = (SCNView *)self.view;
                       SCNVector3 posinView = [view projectPoint:position];

                       NSLog(@"Position in View =  %lf, %lf, %lf", posinView.x, posinView.y, posinView.z);

                                                 min = [view projectPoint:min];
                       max = [view projectPoint:max];
                       NSLog(@"Min Scaled + Projected %lf, %lf, %lf", min.x, min.y, min.z);
                       NSLog(@"Max Scaled + Projected %lf, %lf, %lf", max.x, max.y, max.z);

                       CGFloat width    =  max.x - min.x;
                       CGFloat height   =  max.y - min.y;
                       CGRect maybeRect = CGRectMake(posinView.x - width /2, posinView.y - height /2, width, height);

                       SKSpriteNode * Snode = [SKSpriteNode spriteNodeWithColor:[SKColor yellowColor] size:maybeRect.size];
                       [Snode setPosition:CGPointMake(posinView.x, posinView.y)];
                       [self addChild:Snode];
}

由于某些原因，Snode比预期的大两倍：-O 我也不知道如何处理返回的Z. 某些人可以解释一下吗？

SceneKit与SpriteKit节点交集

0 个答案: