Look At (Flowgraph Node)

Overview

• Node Name: Look At
• Category: simple
• File: extensions/flowgraph/nodes/math/quaternion/lookAt.lua

Computes the quaternion rotation needed to look from one position toward another.

Pin Schema

Input Pins

Output Pins

Internals

How It Works

1. Both from and to must be provided; the node exits early if either is nil.
2. The direction vector is computed: dirVec = to - from.
3. The up vector defaults to (0, 0, 1) unless overridden via the up pin.
4. rot:setFromDir(dirVec, dirVecUp) computes the quaternion that faces along the direction.
5. The result is output as a table via rot:toTable().

Lua Example

-- Point a camera at a vehicle:
-- from = camera position (vec3)
-- to = vehicle position (vec3)
-- value output = quaternion to set camera rotation

-- Custom up vector for banking:
-- up = {0.1, 0, 0.9} for a slight roll

Key Dependencies

• vec3, quat - vector/quaternion math primitives
• setFromDir() - computes rotation from direction + up vectors
• _flowgraph_createNode() - standard flowgraph node registration

Additional Methods

C:init()

Initializes the node, setting up pins and default properties.

C:work()

Main work function called each frame/tick when the node is active.

See Also

• Direction (Flowgraph Node) - Related reference
• FlowGraph Guide - Guide