如何在图层中设置CC3Node的位置?

时间:2011-08-23 14:18:02

标签: cocos2d-iphone cocos3d

我无法在文档中找到它。

我有一个CC3Node(myNode),我的图层有touchDown和amp;的回调。到目前为止,touchMoved事件都有效。我正试图在屏幕上拖动myNode,最好是使用屏幕坐标。

如何设置myNode相对于屏幕(图层)坐标的位置?

1 个答案:

答案 0 :(得分:1)

好吧,我终于找到了这个,尽管这些文章在多个帖子中有点散落。我的最终解决方案看起来像这样:

MyWorld.m:

// Error checking and misc removed
- (void) addBackgroundForProjection
{
    // background plane supports touch events
    background = [CC3PlaneNode nodeWithName: BACKGROUND_PROJECTION_PLANE_NAME];
    [background populateAsCenteredRectangleWithSize: CGSizeMake(10.0, 10.0)
                                        withTexture: [CC3Texture textureFromFile: @"transparent1x1.png"]
                                      invertTexture: YES];
    [background setIsOpaque: NO];
    [background retainVertexLocations];
    [background setLocation: cc3v(0, 0, 0.001)];

    [self addChild: background];
}

// ...

- (void) moveNode: (CC3Node*) node toScreenLocation: (CGPoint) point
{
    // update node on screen
    CC3Plane groundPlane = self.background.plane;
    CC3Vector4 touchLoc = [self.activeCamera unprojectPoint: point ontoPlane: groundPlane];
    CC3Vector newLoc = cc3v(touchLoc.x,touchLoc.y,touchLoc.z);
    [node setLocation: newLoc];
}