Camera Entity Subsystem

[aschaeffer]

Goals

• Cameras are entities
• Different camera types
• Cutscenes
• Bezier curve camera flights

  Camera Types

• Handle camera
  • The camera position and direction is bound to it's handle
  • The handle allows to move the camera and change the direction
  • Use cases:
  • static, fixed position camera
  • 1st person player / spectator camera
  • camera flight / bezier curves
• TODO ...

  Handle Propagation

The handle propagation mode is stored in the "handles" relationship between an entity and it's handle. A handle can be bound to multiple entities to group entities.

Examples for handle / position propagation

• Camera riding on a particle:
  • Handle --[:handles]--> Particle
  • :handles propagation direction: particle to handle
  • Handle --[:handles]--> Camera
  • :handles propagation direction: handle to camera
• 1st person player camera
  • Handle --[:handles]--> Player
  • :handles propagation direction: player to handle
  • Handle --[:handles]--> Camera
  • :handles propagation direction: handle to camera
• bezier curve camera flight
  • Handle --[:handles]--> BezierCurvePointer
  • :handles propagation direction: bezier curve pointer to handle
  • Handle --[:handles]--> Camera
  • :handles propagation direction: handle to camera

    Handle Propagation Modes

• No position propagation
• Entity to handle (if the entity changes the position, the handle's position is also changed)
• Handle to entity (if the handle's position is changed, the entity position is also changed)
• Both directions

[IAmNotHanni]

I was amazed how two-point cameras can improve the visual impressions. Its simple: you take one curve for the camera's position and another for the camera's target position. https://www.youtube.com/watch?v=zqldiZ2Sht4&feature=youtu.be&t=1m44s