37 lines
1.9 KiB
Markdown
37 lines
1.9 KiB
Markdown
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# Dot Product
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Menu Path : **Operator > Math > Vector**
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The **Dot Product** [uniform Operator](https://docs.unity3d.com/Packages/com.unity.visualeffectgraph@8.0/manual/Operators.html#uniform-operators) performs a [dot-product](https://docs.unity3d.com/ScriptReference/Vector3.Dot.html) between two input vectors and outputs the result.
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This Operator is useful for numerous purposes which include:
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- To compute the squared length of a given vector. To do this, connect the same vector to both input ports.
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- To determine whether two normalized vectors point in the same direction. This returns 1.0 if the vectors point in the same direction, 0.0 if they are perpendicular, and -1.0 if they point in opposite directions.
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- To project a vector **A** on a normalized vector **B** and return its projected length along **B**.
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## Operator properties
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| **Input** | **Type** | **Description** |
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| --------- | --------------------------------------- | ------------------------------------- |
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| **A** | [Configurable](#operator-configuration) | The first vector of the dot product. |
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| **B** | [Configurable](#operator-configuration) | The second vector of the dot product. |
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| **Output** | **Type** | **Description** |
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| ---------- | -------- | ------------------------------------------------------------ |
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| **Output** | float | The result of the dot product.<br/>The **Type** changes to match the type of **A** and **B**. |
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## Operator configuration
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To view this [uniform Operator's](Operators.md#uniform-operators) configuration, click the **cog** icon in the Node's header. Here you can configure the data type this Operator uses.
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### Available types
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You can use the following types for your **Input values** and ports:
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- **Position**
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- **Vector**
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- **Direction**
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- **Vector3**
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- **Vector2**
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