Since this project only has 1 sprite animation,
I hard coded the path of texture.
Need to change to accept a path by name

Objects that uses texture must be rendered as blank texture or invalid texture(check pattern with pink and black colors) to let user know that texture isn't working.

• output log

If all textures are going to be in one folder, then make default path for texture.

And also may self destruct if it can

in particle system

must delete sprite actions remaining on the list.
see desturctor in SpriteActionSchedule.cpp

makes more sense

particle system creates one less particle

Layer and Scene can't run actions because they inherit Object not RenderableObject.

Need to fix JumpBy action's position movement calculation due to finishing action with sprite's position off by a little, which ends up sprite in wrong position after some jump actions

sprite action schedule class receives a list of sprite actions, as a vector, then cast to derived action class and clone it, which seems unnecessary.

Since spriteActionSchedule class only maintains the pointers of action and deletes on termination, there is no reason to waste time by making action objects static in GameManager and cast to pointer.

separate from init

Sprite animation class contains multiple texture objects to render each frame of animation.
We can group up and pack each texture into one sprite sheet and swap UV or use divide UV attribute.

Some actions are made for specific classes.
For instance, ProgressFromTo action is made for ProgressObject, not Text or Sprite.
However since all action inherited by same base class, there is issue where some objects having wrong type of actions, for example, Sprite can have ProgressFromTo but there's nothing to update about it.

For now, I'm just gonna kill action on start if target isn't right.
Maybe, I will use enum to tell which type of action is object trying to use, but I'm not big fan of enum in c++ like Java.
Or I can discard all actions that is not right to use, but if I don't use enum, I have to down cast and it's expensive task to check multiple actions through out game.

It will be best practice me to use correct action to correct object but yeah...

ParticleSystem sometimes seems to be lagged on spawning new particles.

somewhere, I believe, glew is included after gl but don't know where it is

need to release shader objects

size always remains 0

check if pointer is null.