rexrainbow's Forum Posts

  • irina

    Yes, I did not add collision avoidance with neighbors in this case, to make them grabbing feed crazily no matter they are bumping together.

  • Update:

    Add document.

    Kyatric

    Please help me to move this topic to "Completed Addons" section.

  • Sim-city!

    I had made a demo to handle the energy diffusion in that kind of application.

    • the blue tiles with "+" are energy source, each one could provide 50 units of energy, and it will diffuse energy to neighbors.
    • the red/blue tiles with "-" are energy consumption, each one will consume 10 units energy. Red is power off, blue is power on.
    • the red/blue tiles with nothing are energy pipe, each one will consume 1 unit energy. Red is no energy go through, blue is energy passing.
    • click an empty cell to create a pipe. click a pipe to remove it.

  • It uses javascript's Math.sin , Math.cos function call.

  • Update

    Update demo.

    • Click to put feed (green box). Bird which found feed would try to eat it. ( action: Apply force toward position )
    • Bird would avoid purple box. ( action: Separation )
    • Bird would do flocking if it had not found any feed. ( action: Cohesion, action: Alignment, action; Separation )

    This behavior had almost done. I would write document later.

  • xoros

    Uh, I understood. I would add action to apply steer force directly toward position or direction.

  • lennaert

    I am not sure how to combine pathfinding with boids behavior. I might think about that later.

  • lennaert

    It might be grouped by additional picking conditions.

    I would add another more basic sample capx while released.

  • lennaert

    Here is a snapshot of demo capx

    F.Call( "SetLOS", F.Param(0) , 100, 180)[/code:350a2r01] would set the range and cone of view to 100 pixels and 180 degrees. Then pick instances by LOS behavior. Do cohesion/alignment/separation in actions.

  • xoros

    In my understand, the logic of sprite would be separated into 2 levels.

    Bottom level is the moving behavior or other appearance behaviors, to set the position/angle/opacity/... of this sprite. This level would export some commands like turn left/turn right/accelerate/brake for top level.

    Top level is the controller, it would fire these commands by human input, or fire by logic (NPC/AI). This AI logic might be

    if ( some_conditions )
    fire_command[/code:29ox0whs]
Boids and LJ potential would provide some values for condition checking, They would not set properties (position/angle) of this sprite directly.

Back to "collision avoidance behavior", it might be another kind of moving behavior since it needs set the position directly to become "collision avoidance". So it would be another behavior.
In above boids demo, sprite would try not too closed to the obstacles by some logic, but it might not "collision avoidance" for all cases without adjust any term of the controller logic.

  • lennaert

    Instances which would affect this boids behavior is picked by line of sight in my default plan. So the range and the radius could be assigned at runtime.

  • Great, this one will be very useful. Will it be possible to set TargetX/Y for individual instances?

    It might put dummy sprites instead of set position and angle by action of this behavior. Did I get your requirement?

  • Update:

    Try to add obstacles avoidance.

    Demo, capx

    It uses separation term of boids behavior to make obstacles avoidance.

  • eli0s

    The steer force in boids or LJpotential is a vector, the angle is "Expression:ForceAngle", and the scale is "Expression:ForceMagnitude" in polar axis. Or ( "Expression:ForceDx" , "Expression:ForceDy" ) in orthogonal axis.

    But I only use "Expression:ForceAngle" in my sample. I would try to make another sample which using both boids or LJpotential behaviors.

    Car behavior is one of possible moving behavior, it might use physics behavior, or just move sprite with bullet + set angle.

    Sorry I had missed the last section. I prefer to make 3rd plugins even in C3.

    The philosophy of official plugins might not be the same as 3rd plugins. Official plugins should be stable to become the foundation of engine/event sheet. 3rd plugins could be more aggressive.

    I am interested in mapping requirements into well design plugins + events.

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  • michael

    I agree these features in rex_text_properties behavior should be put into official one. But after almost one year, they still had not be put.

    You could wait, or use 3rd solution.