Fusion Expression BASICS. DaVinci Resolve

ion in this video we will look at Fusion Expressions Basics so let's jump into this video in Diamond division you can enable expression by right clicking on a parameter and choosing expression in Fusion every parameter got values that will be used to change the parameter and how this expression work is that when you input the expression into the expression box the output of that expression will be used to change the parameter fission's expression is based on Lower code and Max so if we know both of these things then we can fully understand this expression but we don't really need to fully understand the expression as we only need to know what we want to achieve by using the expression now the reason why expression is a good thing by using expression we can link parameters so that one parameter can control other parameter and second thing is that expression can be used for animation without using keyframes so let's look at in depth on these two things I will share with you guys some basic infos and basic things so that you can start using expression on your fission composition so first of all about linking parameters on Fusion every parameter got a name and if you type the name on the expression box the value of that parameter will be the output for the expression linking these two parameters together there is three ways you can type in the parameter on this expression box first way is only useful if you are using parameter from the same two world at that time just directly type in the parameter name on the expression box and the expression output will be that parameters value second way is that if you over your mouse over a parameter on your bottom left it will show tools name just type that name on the expression box and the expression will return that parameters value the Third Way is to use the chain function on the left side of the expression box there will be plus icon you can drag this plus icon to the parameter that you like your expression to be linked to and the name of this parameter will be automatically added into this expression box to use this method on other tools or other nodes you need to pin one node and open the other that way you can use this chain function so these are the three ways that you can use parameter on the expression box in addition to directly typing the parameter name you can even use max operation on this parameter like addition subtraction multiplication sign course like all those Max operation you can use that on this parameter another thing about this Max operation is that you can use this Max operation between two numbers or between one parameter and the number or between two parameters now to use the expression for animation or for the automation first way to automate is by creating new parameter on the tool that we are using the expression the sole purpose of this new parameter that we create is to give value to the expression so that expression can do the animation or automation so to create a new parameter from the inspector right click on the tool name or from the node tab right click on the Node and choose edit controls then from the control box type the name you like for this new parameter then from the ID create a new ID by typing the name from the type number means the parameter will control numbers Point means it will control points like X and Y test means it will control a test from the page select the page that you like your parameter to be visible on choose animatable if you want to add keyframe to these values or choose passive if not from the input controls choose the type of controls that you like to see on the inspector tab for the number slider control is good for Point offset control and for the text text edit control and if you are using number and you don't like to have decimal points just tick the integer box weave control is used to show controls on the viewer so we can change the value but we don't really need that option so just stick to none just press ok now your new parameter will be visible on the inspector tab now keyframe this parameter and use this parameter on the expression there are so many things that you can do with this symbol parameter that you created like simply creating a countdown and if you want to take it to another level you can combine this parameter with Max operation next method is by using time code this time expression will output the current frame number as output Port so by just adding time on the expression box the parameter will have different value on each frame which will be very useful for animating next expression is the sign and cause both sine and cos will return value from -1 to 1 sine value will be like 0 then 1 then minus 1 while cos value is like 1 0 then minus 1 combining sine value with time will give you a good animation without using keyframe simple tip I can share is that if you simply put sign time value the value will change so fast so to make it slower just multiply the time value with the decimal points and to make it faster multiply it with the integers and if you don't want to see negative value you can use the absolute expression so to use that type in abs bracket sign bracket time bracket close bracket close now this expression will only return positive value next expression for automation is the if expression if expression is used for checking condition if condition is true it will return a value if condition is false it will return another value the syntax of the if expression is like this iif bracket condition comma True Value comma false value bracket Clause true value means if the condition is true that value will be returned false value means if condition is false that value will return so just by combining all the expression that I mentioned you can achieve good Automation and animation order Fusion composition some tips that I can share is that while using expression on Text Plus node if you want to type a test then type the test inside double quotation next if you want to add more expression onto this test just add two periods and type your next expression and lastly if you want to add a line break add backslash n and there will be a line break that's all about this video this is just basic related to expression in the description I will share you guys some links that will be useful for your expression Journey so that's all about this video I hope you guys find this video useful if you do so the like button and don't forget to subscribe

Channel: TechCycle

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Id: frizs0dLL1o

Length: 7min 44sec (464 seconds)

Published: Wed Nov 30 2022