add calculation delta of node angle #6102
Conversation
|
_onTouchMoved 里也有相关 delta 的逻辑，需要同步修改一下吗 |
| // calculation delta of node angle | ||
| _getLocalAxisAlignDelta (delta) { | ||
| let worldRot = cc.quat(); | ||
| this.node.getWorldRotation(worldRot); |
There was a problem hiding this comment.
这里如果耗性能的话，是不是可以先判断下，如果 angle 为 0，就不做这个处理了
一般也很少人回去旋转 scrollview
There was a problem hiding this comment.
@2youyou2 这里是否能通过 this.node._worldMatDirty 来判断是否有旋转？如果 _worldMatDirty 为 true 时，在 TOUCH_MOVE 触发的时候获取的 _worldMatDirty 是否还是 true，还是说已经被重置为 false 了
_getLocalAxisAlignDelta (delta) {
if (this.node._worldMatDirty) {
this.node.getWorldRotation(_worldRot);
}
let oriDelta = cc.v3(delta.x, delta.y, 0);
let deltaMove = cc.v2();
if (this.horizontal) {
Vec3.transformQuat(_tempVec3, Vec3.RIGHT, _worldRot);
deltaMove.x = oriDelta.dot(_tempVec3);
}
if (this.vertical) {
Vec3.transformQuat(_tempVec3, Vec3.UP, _worldRot);
deltaMove.y = oriDelta.dot(_tempVec3);
}
return deltaMove;
},
``
There was a problem hiding this comment.
不行啊，_worldMatDirty 什么时候都有可能被重置掉
There was a problem hiding this comment.
把 delta 转到 local 坐标系下就好了嘛
|
_onTouchMoved 中的 |
| _getLocalAxisAlignDelta (delta) { | ||
| let worldRot = cc.quat(); | ||
| this.node.getWorldRotation(worldRot); | ||
| let oriDelta = cc.v3(delta.x, delta.y, 0); |
| @@ -1011,8 +1011,15 @@ let ScrollView = cc.Class({ | |||
| this._gatherTouchMove(deltaMove); | |||
| }, | |||
|
|
|||
| // Contains node angle calculations | |||
| _getLocalAxisAlignDelta (touch) { | |||
| let point = this.node.convertToNodeSpaceAR(touch.getLocation()); | |||
There was a problem hiding this comment.
可以定义几个临时变量传到 convertToNodeSpaceAR 里面作为返回值
| let _point = this.node.convertToNodeSpaceAR(touch.getLocation(), _tempPoint); | ||
| let _prevPoint = this.node.convertToNodeSpaceAR(touch.getPreviousLocation(), _tempPrevPoint); | ||
| return _point.sub(_prevPoint); |
There was a problem hiding this comment.
应该不用创建 _point _prevPoint 变量了
_tempPoint _tempPrevPoint 就是输出变量
knoxHuang
force-pushed
the
v2.3.0-release
branch
from
dc227b8
to
3a98a66
Compare
Re:
cocos-creator/2d-tasks#2399
/issues/6654
Changes: