cocos2dx骨骼动画Armature源码剖析(三)(5)

转了一大圈终于在每帧更新了Bone中的tweenData，最后看Bone的update，其根据tweenData计算了worldInfo、worldTransform。而且updateDisplay更新skin的信息，staticcast<skin*>(display)->updateArmatureTransform();再transform = TransformConcat(_bone->getNodeToArmatureTransform(), _skinTransform);

void Bone::update(float delta) { if (_parentBone) _boneTransformDirty = _boneTransformDirty || _parentBone->isTransformDirty(); if (_armatureParentBone && !_boneTransformDirty) { _boneTransformDirty = _armatureParentBone->isTransformDirty(); } if (_boneTransformDirty) { if (_dataVersion >= VERSION_COMBINED) { TransformHelp::nodeConcat(*_tweenData, *_boneData); _tweenData->scaleX -= ; _tweenData->scaleY -= ; } _worldInfo->copy(_tweenData); _worldInfo->x = _tweenData->x + _position.x; _worldInfo->y = _tweenData->y + _position.y; _worldInfo->scaleX = _tweenData->scaleX * _scaleX; _worldInfo->scaleY = _tweenData->scaleY * _scaleY; _worldInfo->skewX = _tweenData->skewX + _skewX + _rotationZ_X; _worldInfo->skewY = _tweenData->skewY + _skewY - _rotationZ_Y; if(_parentBone) { applyParentTransform(_parentBone); } else { if (_armatureParentBone) { applyParentTransform(_armatureParentBone); } } TransformHelp::nodeToMatrix(*_worldInfo, _worldTransform); if (_armatureParentBone) { _worldTransform = TransformConcat(_worldTransform, _armature->getNodeToParentTransform()); } } DisplayFactory::updateDisplay(this, delta, _boneTransformDirty || _armature->getArmatureTransformDirty()); for(const auto &obj: _children) { Bone *childBone = static_cast<Bone*>(obj); childBone->update(delta); } _boneTransformDirty = false;

如何展示(draw)出图片(skin)

Armature诗歌node，加入父节点后会调用其draw函数，遍历draw了bone的显示元素。

void Armature::draw(cocosd::Renderer *renderer, const Mat &transform, uint_t flags) { if (_parentBone == nullptr && _batchNode == nullptr) { // CC_NODE_DRAW_SETUP(); } for (auto& object : _children) { if (Bone *bone = dynamic_cast<Bone *>(object)) { Node *node = bone->getDisplayRenderNode(); if (nullptr == node) continue; switch (bone->getDisplayRenderNodeType()) { case CS_DISPLAY_SPRITE: { Skin *skin = static_cast<Skin *>(node); skin->updateTransform(); BlendFunc func = bone->getBlendFunc(); if (func.src != _blendFunc.src || func.dst != _blendFunc.dst) { skin->setBlendFunc(bone->getBlendFunc()); } else { skin->setBlendFunc(_blendFunc); } skin->draw(renderer, transform, flags); } break; case CS_DISPLAY_ARMATURE: { node->draw(renderer, transform, flags); } break; default: { node->visit(renderer, transform, flags); // CC_NODE_DRAW_SETUP(); } break; } } else if(Node *node = dynamic_cast<Node *>(object)) { node->visit(renderer, transform, flags); // CC_NODE_DRAW_SETUP(); } } }

再skin->draw(renderer, transform, flags);会用到刚刚更新的_quad，显示出最新的图片信息。

{ Mat mv = Director::getInstance()->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW); //TODO implement z order _quadCommand.init(_globalZOrder, _texture->getName(), getGLProgramState(), _blendFunc, &_quad, , mv); renderer->addCommand(&_quadCommand); }

至此，大家对cocos2dx里的骨骼动画应该有了全面的认识，三篇文章介绍的比较粗糙，其实有些细节内容我也没看懂，不过不要在意这些细节，没有实际的改动需求的话，懂80%就可以了，细节可以需要的时候在仔细理解。

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