SL Cert - Basic LSL Rotations

This is an initial take on a set of guidelines for scripting position and rotations. It still needs a lot of work and a good deal of thought.

Basic Requirements

Basic definition of position

• Absolute position
• Relative position

Basic definition of a rotation

• Euler
• Axis and angle
• Quarternions

Changing position and rotation via the edit window

=== Vectors and Operations

• Definition of vector in LSL
• Working with components
• Linear combinations of vectors
• Dot product
• Cross product
• Unit vectors

Intermediate Requirements

Reference Frames

• Global
• Local

Basic commands to get position information

• llGetPos
• llGetLocalPos
• llGetRootPosition

Basic commands to get rotation information

• llGetRot
• llGetLocalRot
• llGetRootRotation

Basic commands for changing position

• llSetPos
• llSetPrimitiveParams
• llSetPos within different reference frames.

Basic commands for changing rotation

• llSetRot
• llSetLocalRot
• llSetPrimitiveParams
• How the commands work in different reference frames.
• Rotations
  • Multiplication and division of rotations
  • Difference between left and right multiplication

Working with vectors

• Finding a vector component in a given direction
• Finding a vector perpendicular to two vectors.
• Finding a vector perpindicular to a plane.

Advanced Requirements

Rotations and position

• using llSetPrimitiveParams to move and rotate at the same time
• Rotating and moving a prim to a specified orientation
  • Absolute coordinates
  • Relative coordinates (in a link set)

Smooth movements

Absolute coordinates

• Rotate and movement around the edge of a prim
• Rotate and move around a fixed point
• Rotate and move around a predefined axis

Local coordinates (within a linkset)

• Rotate and movement around the edge of a prim
• Rotate and move around a fixed point
• Rotate and move around a predefined axis

Transitions

• Smooth movements from one orientation (position and rotation) to another.

Determining specific orientations

Absolute coordinates

• Given a point rotate an object to face the point.
• Given two points rotate an object to face perpindicular to the two points.

Local coordinates to local

• Given a point rotate an object to face a local point.
• Given two local points rotate an object to face perpindicular to the two points.

Local coordinates to absolute

• Given a point rotate an object to face a point in absolute coordinates.
• Given two absolute points rotate a local object to face perpindicular to the two points.