50 lines
1.4 KiB
Markdown
50 lines
1.4 KiB
Markdown
# Rotate About Axis Node
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## Description
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Rotates the input vector **In** around the axis **Axis** by the value of **Rotation**. The unit for rotation angle can be selected by the parameter **Unit**.
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## Ports
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| Name | Direction | Type | Binding | Description |
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|:------------ |:-------------|:-----|:---|:---|
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| In | Input | Vector 3 | None | Input value |
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| Axis | Input | Vector 3 | None | Axis to rotate around |
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| Rotation | Input | Float | None | Amount of rotation to apply |
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| Out | Output | Vector 3 | None | Output value |
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## Controls
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| Name | Type | Options | Description |
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|:------------ |:-------------|:-----|:---|
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| Unit | Dropdown | Radians, Degrees | Switches the unit for input **Rotation** |
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## Generated Code Example
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The following example code represents one possible outcome of this node per **Unit** mode.
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**Radians**
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```
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void Unity_RotateAboutAxis_Radians_float(float3 In, float3 Axis, float Rotation, out float3 Out)
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{
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float s, c;
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sincos(Rotation, s, c);
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Axis = normalize(Axis);
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Out = In * c + cross(Axis, In) * s + Axis * dot(Axis, In) * (1 - c);
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}
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```
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**Degrees**
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```
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void Unity_RotateAboutAxis_Degrees_float(float3 In, float3 Axis, float Rotation, out float3 Out)
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{
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Rotation = radians(Rotation);
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float s, c;
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sincos(Rotation, s, c);
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Axis = normalize(Axis);
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Out = In * c + cross(Axis, In) * s + Axis * dot(Axis, In) * (1 - c);
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}
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```
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