Transcript Evil Boat
Bumper Boats Daniel Johannessen Santiago Donoso Christian Mercado Andreas Juul Hirszhorn Indledning Game concept Player Objective Treasure Virus the Attack ”turn movement” ”turn movement” _RigidBody.dll SWIG Gravity (z-axis) styret af panda float fMass; float fInertia; Vector vPosition; Vector vVelocity; Vector vVelocityBody; Vector vAngularVelocity; float fSpeed; float fOrientation; Vector vForces; Vector vMoment; float ThrustForce; Vector PThrust, SThrust; // total mass (constant) // mass moment of inertia in body coordinates(constant) // position in global coordinates // velocity in global coordinates // velocity in body coordinates // angular velocity in body coordinates // speed (magnitude of the velocity) // orientation // total force on body // total moment (torque) on body (2D: about z-axis only) // Magnitude of the thrust force // stern thruster forces Forces Affecting the Boat What is Collision Share space in time Collisions are expensive Collision Solids Collision Sphere Collision Tube Collision Plane Collision Polygon Collision Ray Collision Line Collision Segment We applied Collision to geometry ( walls, floor) Collision Handlers CollisionHandlerQueue CollisionHandlerEvent CollisionHandlerPusher PhysicsCollisionHandler CollisionHandlerFloor What can collide in the game? Bumper Boat collides with: Floor – Walls – Evil Boats Barrels - 0x10 0x11 0x12 0x13 Problems & Improvements Only 1 CollisionHandlerPusher – Therefore “Evil Boats” can go through the walls Solution to collision problems: • • Use CollisionHandlerQueues and check each event recorded in it. Use more traverser to check all solid objects for collisions Improvements: • • • • Enemies could use a ray/segment to shoot Create a view/sight for the boat or enemies with the use of segments Use polygons as walls Use segments to know obstacles Ai in Bumper Boats Evil Boat Deterministic Rigid Body Interception Finite State Machine Weaknesses Extending the Ai Evil Boat: Interception Vr Vprey Vpredator Algorithm Closing Velocity Range to Close Time to Close Interception Point Sr Sprey Spredator Tc Sr / Vr S t Sprey ( Vprey )( Tc ) Predicted interception point Enemy Player Evil Boat: Finite State Machine States Search Attack Transitions No Target Target Search Attack No Target Target Weaknesses Interception Algorithm Finite State Machine 3 Cases Distance Calculation Deterministic Extending the Ai Pattern Movement Random Movement Waypoint Navigation Flocking Cohesion Alignment Separation Nondeterministic Ai Patrol Pattern Visibility Arc y Singleton Kun en instans tilladt Udføres typisk ved privat contructor Ingen private type i python pseudo-singleton ingen sikkerhed Interface Bedre overblik Abstrakte metoder Ingen tvang om implementering i python ved pass Factory Genererer objekter Kan abstrahere fra specifikke typer f.eks. Enemy kontra EvilBoat State manager Tilstand kan skiftes runtime Factory til states Singleton Statemanager til spillets state Den overordnede programstruktur Ensartedhed Klasseopdeling efter spilkomponenter Factory og singleton mønstrene Fordele mulighed for udvidelse overskuelighed Interfaces kontra nedarv lav kobling lettere læsbar kode Erfaringer Erfaringer med en game engine sparer ressourcer kan medføre problemer brug dele af den OOP til spilprogrammering