void TransformComponent::UpdateWorldPosition(corgi::EntityRef& entity,
const mathfu::mat4& transform) {
TransformData* transform_data = GetComponentData(entity);
transform_data->world_transform =
transform * transform_data->GetTransformMatrix();
for (auto iter = transform_data->children.begin();
iter != transform_data->children.end(); ++iter) {
UpdateWorldPosition(iter->owner, transform_data->world_transform);
}
}
void TransformComponent::UpdateAllEntities(corgi::WorldTime /*delta_time*/) {
for (auto iter = component_data_.begin(); iter != component_data_.end();
++iter) {
corgi::EntityRef entity = iter->entity;
TransformData* transform_data = Data<TransformData>(entity);
// Go through and start updating everything that has no parent:
if (!transform_data->parent) {
UpdateWorldPosition(entity, mathfu::mat4::Identity());
}
}
}
//该函数只有在Quantum(),GetBitMapRect()函数调用过后才能被调用
//计算机中新的位置可以绘制在屏幕上的部分
//该函数有可能会改变iWorldPosition 和iDrawableBitMapRect的值
void TWorldObject::CalcDrawableRect()
{
//先填充iWorldPoint 和 iDrawableBitMapRect
GetBitMapRect();
UpdateWorldPosition();
iIsNeedDraw = ETrue;
if (iWorldPosition.iTl.iY < Y_AXIS_MIN_LIMIT)
{
if (iWorldPosition.iBr.iY < Y_AXIS_MIN_LIMIT)
{
//此时表示该对象的位置已经超出了需要绘制的范围
iIsNeedDraw = EFalse;
//iWorldPosition.SetRect(0, 0, 0, 0);
//iDrawableBitMapRect.SetRect(0, 0, 0, 0);
return;
}
TInt offset = Y_AXIS_MIN_LIMIT - iWorldPosition.iTl.iY;
iDrawableBitMapRect.iTl.iY += offset;
iWorldPosition.iTl.iY += offset;
return;
}
if (iWorldPosition.iBr.iY > Y_AXIS_MAX_LIMIT)
{
if (iWorldPosition.iTl.iY > Y_AXIS_MAX_LIMIT)
{
//此时对象刚加入队列 还没有到达可显示的区域
//将可显示区间 设置为0
iIsNeedDraw = EFalse;
//iWorldPosition.SetRect(0, 0, 0, 0);
//iDrawableBitMapRect.SetRect(0, 0, 0, 0);
return;
}
else
{
TInt offset = iWorldPosition.iBr.iY - Y_AXIS_MAX_LIMIT;
iDrawableBitMapRect.iBr.iY -= offset;
iWorldPosition.iBr.iY -= offset;
}
}
}
