change: GraphicsGroup no longer centers with anchors (#2966)
`useAnchor: false` The graphics members are positioned from the top left
```typescript
const graphicGroup = new ex.GraphicsGroup({
useAnchor: false,
members: [
{
graphic: heartImage.toSprite(),
offset: ex.vec(0, 0),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(0, 16),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(16, 16),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(16, 0),
},
],
});
```
`useAnchor: true` The graphics members' total combined bounds are centered by the actor's anchor (.5, .5) by default
```typescript
const graphicGroup = new ex.GraphicsGroup({
useAnchor: true,
members: [
{
graphic: heartImage.toSprite(),
offset: ex.vec(0, 0),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(0, 16),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(16, 16),
},
{
graphic: heartImage.toSprite(),
offset: ex.vec(16, 0),
},
],
});
```
