What is ige.useManualRender(true)

[zaquanishak]

Hi coolblake3421,

I see this in ur example 101-isoland, can u explain to me what is this? and why do u need it in ur isoland examples?
Thanks in advance.

Regards,
Zachz

[coolbloke1324]

The manualRender() method allows you to tell the engine not to render each tick and instead to render frames "on demand" as your application needs them. The iso-island example is a good use case. Moving objects on screen are rare and only occur when the user is placing an object so the renderer only needs to update when something on screen has changed.

All the best!

Rob

[zaquanishak]

Thanks coolbloke for the explanation.

[zaquanishak]

so what happened if i use manualRender on moving character? how will it effect? I was thinking if i could use manual render on other object around the character, which mean when the character moving from point A to B all object around the character will be manualRender and destroy whenever it doesnt show in the viewport. Is it possible?

Regards,
Zachz

[coolbloke1324]

so what happened if i use manualRender on moving character? how will it effect? I was thinking if i could use manual render on other object around the character, which mean when the character moving from point A to B all object around the character will be manualRender and destroy whenever it doesnt show in the viewport. Is it possible?

Regards,
Zachz

Manual rendering asks the engine to render an entire frame, not just one entity. You cannot render a single entity unless you want to remove all other entities from the frame.

Rendering works by:

1) Sorting all entities by their depth order (what order they will be drawn in)
2) Updating each entity in order by calling the entity's update() method
3) Clearing the canvas completely
3) Drawing each entity in order for each viewport you have in the scenegraph

You cannot render a single entity whilst keeping the rest of the scene intact because you don't have the image data for what is "behind" the entity.