ekku@225: #include "Player.hh"
ekku@225: #include "Rope.hh"      
ekku@225: #include "Engine.hh"
terom@412: 
ekku@225: #include <math.h>
ekku@252: #include <stdexcept>
ekku@225: 
terom@235: Rope::Rope(Player &player) : 
terom@311:     PhysicsObject(player.state.world, ROPE_MASS, Vector(0,0), Vector(0,0), ROPE, 0.00, false), 
terom@311:     player(player), 
terom@311:     state(ROPE_FOLDED) 
terom@235: {
terom@235:     // XXX: better shape
ekku@225:     std::vector<Vector> shape(4);
ekku@225:     shape[0] = Vector(-1, -1);
ekku@225:     shape[1] = Vector(-1, 1);
ekku@225:     shape[2] = Vector(1, 1);
ekku@225:     shape[3] = Vector(1, -1);
ekku@225:     setShape(shape);
ekku@225: }
ekku@225: 
terom@235: void Rope::throwRope (void) {
terom@235:     state = ROPE_FLYING;
ekku@225: 
terom@235:     // XXX: this should probably be more dynamic?
terom@235:     length = ROPE_LENGTH;
terom@235:     
terom@235:     // copy position + velocity from player
ekku@285:     setPosition (player.getPosition());
terom@235:     velocity = player.getVelocity() + player.getDirection() * ROPE_VELOCITY;
terom@235:     
terom@235:     // we are FLYING
terom@235:     inAir = true;
terom@235:     
terom@235:     // enable the physics object
ekku@225:     enable();
terom@241: 
terom@241:     // inform network
terom@241:     player.handleRopeState(state);
ekku@225: }
ekku@225: 
saiam@273: void Rope::onCollision (Vector collisionPoint, PhysicsObject *other) {
ekku@322:     // Fix the rope to another player if collided with it
ekku@305:     if (other != NULL) {
terom@328:         // we collided with another object
ekku@305:         if (other->getType() == PLAYER) {
terom@328:             // set our player's pivot to the object that we collided with
ekku@305:             Player *target = dynamic_cast<Player*>(other);
terom@328:             
terom@328:             // ignore if the rope hits ourself
terom@328:             if (target == &this->player)
ekku@305:                 return;
terom@328:             
terom@328:             // set player's pivot to the other player
terom@328:             player.setPivot(target);
terom@328: 
terom@328:             // disable ourselves as we're no longer relevant, don't keep colliding with the player
terom@328:             disable();
terom@328: 
terom@328:         } else {
terom@328:             // ignore other objects
ekku@305:             return;
ekku@305:         }
terom@328: 
terom@328:     } else { 
terom@328:         // Collided with terrain, set player's pivot to ourselves
ekku@322:         player.setPivot(this);
ekku@305:     }
terom@282: 
terom@235:     // attached to something!
terom@235:     state = ROPE_FIXED;
ekku@305:     velocity = Vector(0,0);
ekku@252:         
ekku@252:     // Ropes location will be used as the pivot point, so move the location to the collisionPoint.
ekku@252:     // Currently the position is something like one pixel away from the collisionPoint where there isn't ground.
terom@328:     setPosition(collisionPoint);
terom@241:     
terom@241:     // inform network
terom@241:     player.handleRopeState(state);
ekku@225: }
ekku@225: 
ekku@225: void Rope::release (void) {
ekku@252:     // Remove the rope from the PhysicsWorld
ekku@252:     disable();
ekku@229: 
terom@235:     state = ROPE_FOLDED;
ekku@228:     
ekku@228:     // player doesn't have a pivot anymore
terom@235:     player.setPivot(NULL);
terom@241:     
terom@241:     // inform network
terom@241:     player.handleRopeState(state);
ekku@225: }
ekku@225: 
terom@235: void Rope::changeLength (float delta) {
terom@241:     // change length
terom@235:     length += delta;
terom@241:     
terom@241:     // minimum length
terom@235:     if (length < 0)
terom@235:         length = 0;
terom@241: 
terom@241:     // inform network
terom@241:     player.handleRopeLength(length);
ekku@231: }
ekku@231: 
ekku@225: RopeState Rope::getState (void) {
terom@235:     return state;
ekku@225: }
terom@241:         
terom@241: float Rope::getLength (void) {
terom@241:     return length;
terom@241: }
terom@241: 
terom@328: Player *Rope::getPivotPlayer (void) {
terom@328:     if (player.getPivot() == this)
terom@328:         return NULL;
terom@328:     else
terom@328:         return dynamic_cast<Player*>(player.getPivot());
terom@328: }
terom@328: 
terom@328: void Rope::updateState (RopeState new_state, Vector position, Vector velocity, float new_length, Player *pivot_player) {
terom@241:     // update physics enabled/disabled state
terom@241:     if (new_state == ROPE_FOLDED || new_state == ROPE_FIXED)
terom@241:         disable();
terom@241: 
terom@241:     else // new_state == ROPE_FLYING
terom@241:         enable();
terom@241:     
terom@328:     // update player.pivot to either the given pivot_player, or this rope
terom@328:     if (new_state == ROPE_FIXED) {
terom@328:         if (pivot_player)
terom@328:             player.setPivot(pivot_player);
terom@328:         else
terom@328:             player.setPivot(this);
terom@241: 
terom@328:     } else if (this->state == ROPE_FIXED)
terom@241:         player.setPivot(NULL);
terom@241: 
terom@241:     // update position stuff
terom@264:     updatePhysics(position, velocity, true, FACING_RIGHT, 0);
terom@241: 
terom@241:     // update vars
terom@241:     this->state = new_state;
terom@241:     this->length = new_length;
terom@241: }
terom@241: 
terom@241: void Rope::updateLength (float length) {
terom@241:     // update length
terom@241:     this->length = length;
terom@241: }
ekku@225: 
terom@412: void Rope::draw (graphics::Display &display, PixelCoordinate camera) {
terom@328:     PixelCoordinate player_pos = player.getCoordinate() - camera;
terom@328:     PixelCoordinate target_pos;
terom@377:     
terom@377:     // figure out what target is
terom@328:     if (state == ROPE_FOLDED) {
terom@233:         return;
terom@233: 
terom@328:     } else if (state == ROPE_FLYING) {
terom@328:         // target is us
terom@328:         target_pos = getCoordinate();
terom@255: 
terom@328:     } else {    // state == ROPE_FIXED
terom@328:         // sanity-check
terom@328:         if (player.getPivot() == NULL)
terom@328:             throw Error("Rope::draw in state ROPE_FIXED, yet player.getPivot() is NULL");
terom@328:         
terom@328:         // target is our pivot
terom@328:         target_pos = player.getPivot()->getCoordinate();
terom@328:     }
terom@377:  
terom@328:     // align with camera
terom@328:     target_pos -= camera;
terom@328:     
terom@328:     // draw a line from the player to the target chosen above
terom@412:     display.get_gc()->draw_line(
terom@257:         player_pos.x, player_pos.y,
terom@328:         target_pos.x, target_pos.y,
terom@377:         ROPE_COLOR_DARK
terom@233:     );
ekku@225: }
ekku@225: 
ekku@252: void Rope::tick (TimeMS dt) {
terom@328:     if (state == ROPE_FLYING) {
terom@328:         // let PhysicsObject handle the flying stage
ekku@252:         PhysicsObject::tick(dt); 
ekku@322: 
terom@328:     } else if (state == ROPE_FIXED) {
terom@328:         // if player's pivot is some other player, then don't re-check the terrain
ekku@322:         if (player.getPivot() != this)
ekku@322:             return;
ekku@322: 
terom@328:         // If there's no ground on the pivot point anymore, release the rope
terom@408:         if (!world.terrain.collides(position)) { 
terom@328:             // XXX: move to some new method
ekku@322:             state = ROPE_FLYING;
ekku@322:             length = ROPE_LENGTH;
ekku@322:             inAir = true;
ekku@322:             player.setPivot(NULL);
terom@263:             player.handleRopeState(state);
ekku@252:         }
terom@328:     } else { // state == ROPE_FOLDED
terom@328:         // ignore ticks when folded
ekku@252:     }
ekku@252: }
terom@328: