How To Change Shape Of Colliders With Animations Unity

2D Games take always been fun to play, withal making a 2D game tin can speedily get overwhelming due to all the assets you need. Using Unity's Sprite Shapes, making 2D environments has never been easier. Best of all, you can get started with just a couple of sprites!

A Sprite Shape is an nugget that contains sprites assigned to specific angles. When in a scene, a Sprite Shape volition tile assigned sprites along its path. It deforms the sprites that information technology will brandish depending on its settings. This allows you to create circuitous geometry using simple tools and settings.

In this tutorial, yous'll make a game using Sprite Shapes. Along the fashion, you will learn the key components of:

• Creating and modifying Sprite Shapes.
• Irresolute Sprite Shapes based on orientation.
• Using Sprite Shape spline tools to change its shape.
• Calculation variation to your Sprite Shapes.
• Generating shut-ended and open-ended Sprite Shapes.
• Applying colliders to Sprite Shapes.

Note: This tutorial assumes that you lot know the basics of Unity development. If you're new to Unity development, check out this great Getting Started in Unity tutorial.

You'll need a copy of Unity 2019.1 (or newer) installed on your machine to follow along.

You will also need to know the basics of how to work in a 2nd surroundings. If you haven't played around with 2nd before, cheque out this great Introduction to 2d tutorial.

Getting Started

At present that you have Unity, you demand to download the sample project. Yous can exercise that by clicking ane of the Download Materials buttons at the superlative or bottom of this tutorial.

One time downloaded, extract the files and open the Introduction to Sprite Shapes Starter projection in Unity. With the projection loaded, open up the RW folder using the Project window, then observe the folder structure:

Here's what each contains:

• Animations: Contains all the animations and animation controllers for the enemy and player.
• Physics Materials: Contains a loftier friction physics material for the Histrion.
• Prefabs: Currently contains the thespian, enemy and flag.
• Scenes: This contains the main game scene.
• Scripts: Contains all the scripts required for the player, camera, SFX and game direction.
• Sounds: Contains all the sounds used inside the game.
• Sprite Shapes: Currently an empty folder where y'all will create new Sprite Shapes.
• Sprites: Contains all the premade sprites for the actor, enemies and environment.

Earlier yous begin using Sprite Shapes, you have to install it from the Package Manager. To practise this, select Window ► Bundle Managing director from the superlative bill of fare.

In the Bundle Manager, select Advanced ► Show preview packages and install the 2nd SpriteShape package.

Open up the MainScene in the Scenes binder, and expect at the Game view. You volition see an empty blue sky that you will fill with beautiful Sprite Shapes.

Creating the Sprite Shape Profile

A Sprite Shape Profile is an asset that configures all the options for a particular type of shape. Inside this nugget, you will assign the sprites y'all wish to use and tell Sprite Shape how to render them.

First, yous are going to create all the different Sprite Shape Profiles, and so you will get into the scene and add them to the scene.

To create a Sprite Shape Profile, navigate to the Sprite Shapes folder and select Assets ► Create ► Sprite Shape Profile ► Open up Shape. Name the profile Platform.

Select the Platform Sprite Shape and look at the Inspector; this is where you alter all the settings for the profile. Earlier you brainstorm playing around with these settings, hither are the nearly important settings:

In this tutorial, these are the settings you volition alter:

• Make full Texture: On a closed shape, Unity will tile this texture to fill the within of the shape.
• Currently Selected Bending Range: Using the rotating slider, you tin can select different angle ranges, doing this will allow you to change settings for that angle range.
• Sprite Preview: This will preview the first sprite assigned to this angle range.
• Possible Sprites in Angle Range: This allows yous to assign multiple sprites to 1 angle range allowing for variation. You will cover this in more detail afterward in this tutorial.
• Corner Sprites: This allows y'all to assign sprites for each corner.

It'southward not bad to know what everything does in theory, but now it'south time to create a platform for your game!

Setting up the Platform Sprite Shape

Sprite Shapes consist of ii main types:

• Close Concluded: The shape's line segments or curves are all connected, this makes Sprite Shape utilise a fill texture. A circle and square are Shut Ended as they don't have any loose ends.
• Open Ended: The shape is essentially a line used as a path for sprites to exist tiled across. This type of Sprite Shape does not allow a fill up texture.

The platform is an open-ended shape; now you can begin filling out the empty Sprite Shape Profile asset.

Setting up an Angle Range

Considering that the platform is an open-concluded Sprite Shape Profile, multiple angle ranges are not required. You only need one angle range for the Sprite Shape.

When you assign a Sprite to an angle range, the Sprite will be automatically rotated to fit the current bending, therefore, eliminating the need for manual orientation during the creation of a sprite.

Select your Platform profile, and notation that an angle range has already been created for you, ranging from 180 to -180 degrees, essentially roofing the entire circle.

To attach a Sprite to the angle range select the + button under the Sprites and select the Platform Bare sprite asset.

That is all you lot need to exercise on the platform contour; nonetheless, you may notice that the platform is carve up into multiple segments within the sprite preview. To get a long continuous strip, you need to edit the sprite, merely don't worry the Sprite editor is here to help.

Editing Sprite Borders

To do this, select Platform Blank.png in RW/Sprites/Other and select the Sprite Editor button in the inspector to bring upwardly the sprite editor.

The dark-green control points around the sprite will be the master thing of interest in the Sprite editor. By using borders, you can tell Sprite Shape which part of the sprite should exist tiled, and which parts yous want to act as the border sprites; the border sprites will merely be rendered at the start and end of the path.

Adjust the borders to ensure only the middle portion of the sprite is beingness tiled. Press the Apply button to save your adjustments.

Echo this procedure for Platform Flowers.png in RW/Sprites/Other and adhere Platform Flowers to the current angle range within the Platform profile.

The reason for adding two sprites into ane angle range is to add together some variation without having to create multiple Sprite Shape profiles for each sprite.

Creating Decorations with Sprite Shape

Sprite Shapes tin be used in many creative ways to reduce the workload and create variation in your sprites. In this case, you volition create a Sprite Shape containing trees that tin be tiled across your grounds acting every bit some pleasant backdrop.

This Sprite Shape Profile is very similar to the Platform so duplicate the Platform contour, using Control+D (or Control+D) and rename it to Tree Decorations.

Edit the Tree Decorations profile and replace the electric current two sprites with new sprites from the RW/Sprites/Other/Tree Decorations.png and calculation a tertiary.

Assign the sprites in the order shown below:

The reason for the Empty sprite is to allow for gaps when the Sprite Shape is used in the Scene view.

You have at present created a platform that your player tin jump on to when the role player leaves the footing. Y'all accept also added decorations to make the scene look expert. Oh, await! Y'all don't have a ground notwithstanding. Why don't you practise that next?

Creating a Ground Sprite Shape

The process is similar to creating the platform; still, this fourth dimension, yous will use multiple angle ranges, fill textures and corners.

First, create a new Sprite Shape Profile in the Sprite Shapes folder past selecting Avails ► Create ► Sprite Shape Profile ► Open Shape and name information technology Basis. The Closed Shape tin can as well be used; however, yous are going to utilize an Open Shape to learn how to make your ain bending ranges. This fourth dimension, it will be a bit harder but a lot more interesting.

Creating Multiple Angle Ranges

To create multiple bending ranges, select the outer ring on four different sides and gear up their exact angle ranges using the Start and End text boxes. The exact bending ranges are equally follows:

• Elevation: Starts at 45 and ends at -45.
• Correct: Starts at -45 and ends at -135.
• Lesser: Starts at 225 and ends at 135.
• Left: Starts at 135 and ends at 45.

Annotation: The green text with angles and the words Superlative, LEFT, RIGHT and Bottom in the screenshot to a higher place are for reference purposes only. They volition not appear on screen.

Now that the angle ranges are gear up, add together sprites to each bending range the aforementioned manner you did for the platform shape however this fourth dimension make sure you select the correct bending range y'all desire to edit before y'all start adding sprites.

Conveniently each bending range has a corresponding name (refer to the green text in the screenshot above if necessary), adhere the following sprites for each range:

Annotation: You lot may exist wondering why all of the sprites are oriented upwards, this is considering Unity automatically rotates the sprites based on the angle so it expects that the sprites are facing up.

Calculation a Fill and Corners

This Sprite Shape needs to function as a Close Ended shape, meaning that information technology volition demand a fill texture. The make full texture is RW/Sprites/Other/Ground Fill Texture.png, and it is important to ensure that the Wrap Mode of the texture is prepare to Repeat.

Practise this now and Apply the alter.

This tells Unity that the texture can exist tiled and for a fill texture; this is important to fill the shape correctly. Now, assign the texture to the Sprite Shape contour.

Add together the corner textures by inserting the post-obit sprites into their corresponding fields:

Creating corners and fills is just a matter of assigning sprites to their correct fields.

Just look at that sprite preview, information technology looks beautiful! You're probably really excited to put these into the scene, then here comes the fun office!

Calculation Sprite Shapes to the Scene

Create a Sprite Shape past selecting Create ► 2d ► Sprite Shape in the Hierarchy. Name the GameObject Ground Object.

In one case you create the object, assign the Ground profile to the Basis Object in the Profile field inside the Sprite Shape Controller component. To get a view corresponding to the screen shot below you lot need to click on the Edit Spline button and then select i of the nodes that will appear in the Scene view.

You may also desire to ensure that your Scene view is in 2nd way.

The most of import settings for the Ground Object tin can be found within the Sprite Shape Controller.

The yellowish dot in the Scene view is the currently selected node; almost of the options in the Sprite Shape Controller volition directly impact this node.

Hither are the most important settings:

• Edit Spline: Once you've got that enabled, within your scene, you will exist able to rearrange, add, and delete nodes on your spline. To add together a new node, simply Left-Click anywhere on the spline. To delete a node, select it and press Delete.



• Point Position: This is the position of the bespeak relative to the origin of the GameObject.
• Point Mode:
  • Linear Manner: In this way curves are not formed through the node.
  • Mirrored Mode: The node now has two mirrored tangents which create a smooth connected curve.
  • Non-Mirrored Mode: The node has 2 tangents which are not connected, assuasive for total liberty nevertheless the curves may not stay continued.



• Meridian: Modifies the height of the sprite at that node, it is useful to create variation.



• Sprite Variant: This sprite picker allows you to toggle between the different sprites you lot assigned for the current angle range.
• Corner: You lot can toggle between Disabled and Automatic, if you assigned corners inside the profile information technology volition show here. Even so, there are rules to corners. The two adjacent nodes must be in Linear Point Mode and the corner node itself must be in Linear Point Mode, the bending of the corner also cannot be likewise harsh.



If the corner node angle is too harsh, then the assigned corner cap sprites will not be applied.



• Open Ended: This toggles between an open-concluded shape and a close-concluded shape.

Time to put these tools to use!

Creating the Footing Shape Using the Tools

Now that yous have played around with the tools a chip, it's fourth dimension to create the ground for your game. You volition create the ground shown below:

Each of the nodes serve an important purpose; for example, y'all may be wondering why node 5 may be of any importance.

To modify the location of a node, select the node and change the indicate position attribute in the Sprite Shape Controller.

Here is the purpose and location of each node:

1. This is a corner node; therefore, it is a linear point, and is placed at (X: -2, Y: 0.4).
2. This is a linking node; its sole purpose is to satisfy the conditions for a corner. Since node three is a mirrored tangent node there has to exist a linear point between node i and node iii to create a corner at node 1. This node is a linear node and is at (X: -0.8, Y: 0.4).
3. Is a mirrored tangent node, which creates a slight downwards curve. Information technology is situated at (10: 0.095, Y: 0.4).
4. Some other mirrored tangent node, which creates a polish bend from node 3. It is located at (X: 2, Y: -0.6).
5. Is a linking node. It is a linear node and information technology is positioned at (X: four.13, Y: -0.half-dozen).
6. Another corner node. Information technology is a linear node and is located at (X: v, Y: -0.6).
7. Is a linear node. It can be found at (X: 5, Y: -ii).
8. This is another corner. You know how it goes — information technology's a linear node that is at (X: -2, Y: -ii) .

Well washed! You just set up your very first Sprite Shape from a profile to a proficient looking GameObject. Information technology'southward fourth dimension to get some characters in the game. :]

Applying Collisions to Sprite Shape

For the character to interact with the Sprite Shape, information technology has to have a collider. To practice this, add together an Edge Collider 2nd to the Ground Object. You may notice that the collider doesn't exactly fit the shape of the Footing Object however there are a few more options in the Sprite Shape Controller now. I of these options is the beginning; play with this value to make the collider fit the outline of the Ground Object.

Once you add an Edge Collider 2D, there are a few more options yous can change within the Sprite Shape Controller.

• Update Collider: When yous change the shape of a Sprite Shape and y'all desire to update the collider, deselect information technology and select it once more.
• Detail: Modifies the level of detail of the collider; the higher the detail the more smoothen the collider (increasing the item may decrease performance).
• Offset: Offsets the collider's edges from the center.

Annotation: Once y'all have changed the collider options in the Sprite Shape Controller, you can utilize the Edit Collider button in the Edge Collider 2nd to manually fit the collider to the shape of the Ground Object.

It is time to add together the hero of your game at present!

Elevate-and-drop the Thespian from RW/Prefabs into the scene. Ensure that the player is centered in the Camera's view and is besides continuing on the Footing Object. Select the Role player GameObject from the Hierarchy and drag it into the Actor slot in Camera Focus on Chief Camera.

Press play and you can move and leap around on your ground. If you couldn't tell from the astonishing art, the histrion is a programmer who is currently in the middle of a coding session and hasn't taken a intermission for the last ii days. :]

Finishing up the Scene

Create a new Sprite Shape GameObject called Heart Ground Object and assign the Ground profile, move the GameObject to the correct of the Basis Object leaving a small gap.

Course a pentagonal shape using the tools and techniques previously discussed, also add an Edge Collider 2D to the Middle Ground Object so that the actor can interact with information technology.

Adding Platforms to the Scene

The scene is looking a bit boring right at present, so give it some love by calculation a few floating platforms.

Create a new Sprite Shape GameObject called Floating Platform and attach the Platform profile. Unlike the Ground Object this is non a close-ended shape so enable the Open Concluded option in the Sprite Shape Controller.

The tools to modify the Floating Platform are the exact aforementioned as the ones you used for the Ground Object. To make the platform, delete the two bottom nodes leaving y'all with a straight horizontal platform. Fill up the gap between the 2 solid grounds using the Floating Platform. Don't forget to add an Border Collider 2nd and arrange the offset to fit the collider onto the sprite.

Duplicate the Floating Platform and rename it Floating Cease Platform; this is where you are going to place the finishing flag.

Place the Floating End Platform later the Heart Basis, so that the histrion can jump onto it from the Heart Ground.

These are the positions and type of each node:

1. A linear node located at (X: -one, Y: 2).
2. A non-mirrored tangent node located at (Ten: 0.45, Y: 2).
3. A not-mirrored tangent node located at (X: 2, Y: two.viii).
4. A linear node located at (X: 4, Y: 2.8).

This platform is going to exist a bit unlike. During the creation of the Platform profile, you assigned two unlike sprites to the same angle range. To toggle what sprite each node uses, select the node and selection which sprite you lot want to utilise in the sprite variant field.

Change the first and 3rd node to the second sprite variant to create some variation in the platform.

Printing Play and the role player should be able to run and jump across the map. If the player is non able to jump onto a platform, make sure to lower it's height off the ground to make it easier to jump onto. This is too a skillful time to check if all the Sprite Shapes take colliders.

Applying Decorations to the Level

Everything works fine, but to spice up the scene yous need to add some background decorations. Add another Sprite Shape GameObject to the scene and phone call it Tree Decorations. Ensure that the Sprite Shape is Open Ended and information technology is using the Tree Decorations profile.

This Sprite Shape tin be tiled on tiptop of the different grounds and platforms to add a pleasant backdrop. You fastened iii different sprites to the Tree Decorations profile. Two types of trees and an empty sprite, using the sprite alphabetize you can toggle between these sprites.

If that variation isn't plenty, you can also play with the superlative property of each node. Outset place the nodes roughly matching the outline of the Ground Object.

Add a few nodes in between and change the sprite index to create more variety.

Slightly modify the height of some of the nodes to brand it seem less repetitive. You may accept to accommodate the position of the node to set the sprite back on the ground.

Repeat the procedure of calculation new ornament Sprite Shape GameObjects with the Tree Decorations profile for each ground and platform. Once you're done, the scene should look something like this:

You lot should be proud — that is a beautiful looking scene created with just a couple of assets! :] Time to necktie everything up with some crawly gameplay elements.

Tying up Game Elements

Before adding any enemies, clean up the Bureaucracy by group the footing objects and platform objects. Make the decorations a child of the platform or ground they are on and so that if you move the basis, the decorations will move with it.

Yous may have noticed the timer in the elevation-left; this is to see how quickly you lot can finish the level. The timer volition stop when you reach the end. To add together the terminate, drag the Flag from RW/Prefabs onto the Floating End Platform.

The Flag represents the sweet taste of victory when you printing the Play button and everything works fine, merely you lot don't live in a perfect world and at that place are always errors blocking the way.

Elevate the Enemy from RW/Prefabs onto the Ground Object. You will observe a horizontal dark-green line going through the Enemy; this is the path that the Enemy will patrol. You tin modify this path using the Left Point and Right Bespeak in the Enemy Controller.

Indistinguishable the Enemy and strategically place it around the scene to give yourself a challenge (grouping the enemies together under an empty GameObject to keep the Hierarchy organized). Modify the path of the enemy to suit the ground that it is on. Your scene should look something like this, with all the enemies:

To win, you take to reach the flag at the end; if you touch an enemy you will dice simply if yous spring on top of the enemy yous can destroy it.

Press Play and control your coffee-powered programmer to a successful build, crushing all errors in your path!

Can you do better than 15 seconds?

Where to Go From Here?

You can download the complete projection using the Download Materials button at the superlative or lesser of this tutorial.

In this Sprite Shape tutorial for Unity, you learned how to:

• Install and configure Sprite Shapes.
• Create and modify Sprite Shape profiles.
• Work with Sprite Shape tools to create close- and open-ended shapes.
• Use the given tools to add variation using limited sprites.

This project is only the beginning; in that location is and then much more than you lot tin can add. I'm interested to run across what you come up with!

Did you bask this tutorial? Desire to learn more? Cheque out our book Unity Games by Tutorials, which has more info on making games with Unity.

If you want to learn more near Sprite Shapes, check out this tutorial by Unity or go to the Sprite Shape forum.

If you have any suggestions, questions or if you want to show off what yous did to improve this projection, bring together the give-and-take beneath.

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