[illusory] automatic door blueprint notes

【 Unreal Engine 】UE4 Automatic door and manual door opening blueprint teaching
The notes are taken from AF Video of little white dragon .

One 、 Automatic Door

1. Create a door blueprint

Create a ACTOR The blueprint .

Copy the model and paste it into the components of the blueprint .

principle —— Change the position of the model .

2. Open the door with coordinates

Create two custom events ： Open door / Closing event —— Hold down ctrl Drag and create keys for two doors

Drag and drop Door R Key and create “ Set relative offset ” function —— stay NEW Location Right click “ Split structure pin ”—— Enter the corresponding coordinate value after opening the door

3. Animate door opening

Drag and drop “ Set relative position ” Functional “ The goal is ” And new “ time axis ”—— Open timeline , Add floating point track

Right click to add a key frame —— Set the first point time =0, value =0

Add a second point ： Time =1, value =1（ If the dot jumps out of view , You can click the two buttons in the red box ）—— The overall opening time is 1S, So adjust the whole “ length ”=1.

Select two points , The right choice “ Automatically ”—— Blue handle will appear at two points —— Adjust the curve through the handle , Make the door opening animation more smooth .

4. Door opening and closing logic

When closing the timeline page , The timeline function will add the track we just added —— Drag and drop “ Open door ” newly build Lerp Difference function ——A Value is door R Initial position ,B The value is the end position , The return value is connected to the offset axis （ If it is moving on another axis , Just connect the corresponding coordinate axis ）

Interpolation is equivalent to a range （0,1） Of IF function ： If value =0, Play A; If value =1, Play B
This is the time axis setting just now （0,1） Why .
“ Open door ” Events connect the timeline “PLAY”,“ close ” Events connect the timeline “Reverse”.
The logic is ： Open the door and play normally , When the door is closed, it plays in reverse , The value is also the opposite .

5. Add trigger

Add the box collider component in the viewport

Adjust the size of the box collider

Combination trigger “ Generate overlapping events ” Check it out.

add to “ When components begin to overlap ”、“ At the end of the component overlap ” event

“ When components begin to overlap ” Connect “ Open door ” function ——“ At the end of the component overlap ” Connect “ close ” function .

6. Add the blueprint to the scenario test

Be sure to check “ Movable ”, Otherwise, drag into the scene without displaying the model .

Add blueprints to the scene .

After entering the collider , The door opens automatically . After leaving the collider , The door closes automatically . The blueprint succeeded .

7. Add another door

Add another door with the same logic ：
Duplicate door R Of “ Set relative position ” And connected —— door L And “ Set relative position ” Our goals are connected —— Copy interpolation , It is connected with the door opening key of the time axis , Return value connection “ Set relative position ” The axis of coordinates . stay A、B Fill in the corresponding coordinate value .

The blueprint of the whole automatic door is over .