void Physics::update(Game *game) { // REMEMBER, AT THIS POINT, ALL PLAYER INPUT AND AI // HAVE ALREADY BEEN PROCESSED AND BOT AND PLAYER // STATES, VELOCITIES, AND ACCELERATIONS HAVE ALREADY // BEEN UPDATED. NOW WE HAVE TO PROCESS THE PHYSICS // OF ALL THESE OBJECTS INTERACTING WITH EACH OTHER // AND THE STATIC GAME WORLD. THIS MEANS WE NEED TO // DETECT AND RESOLVE COLLISIONS IN THE ORDER THAT // THEY WILL HAPPEN, AND WITH EACH COLLISION, EXECUTE // ANY GAMEPLAY RESPONSE CODE, UPDATE VELOCITIES, AND // IN THE END, UPDATE POSITIONS // FIRST, YOU SHOULD START BY ADDING ACCELERATION TO ALL // VELOCITIES, WHICH INCLUDES GRAVITY, NOTE THE EXAMPLE // BELOW DOES NOT DO THAT // FOR NOW, WE'LL JUST ADD THE VELOCITIES TO THE // POSITIONS, WHICH MEANS WE'RE NOT APPLYING GRAVITY OR // ACCELERATION AND WE ARE NOT DOING ANY COLLISION // DETECTION OR RESPONSE float timer = 0; GameStateManager *gsm = game->getGSM(); SpriteManager *sm = gsm->getSpriteManager(); World *w = gsm->getWorld(); GameRules* gR = game->getGameRules(); vector<WorldLayer*> *layers = w->getLayers(); AnimatedSprite *player; PhysicalProperties *pp; TiledLayer *tL; list<Collision*> collisions; //finding TileLayer for(unsigned int i = 0; i < layers->size(); i++) { WorldLayer *currentLayer = (*layers)[i]; if(currentLayer->hasCollidableTiles() == true) { tL = dynamic_cast<TiledLayer*>(currentLayer); if(tL != 0) { i = layers->size(); }//end if }//end if } player = sm->getPlayer(); pp = player->getPhysicalProperties(); //UPDATING ALL VELOCITIES AND DOING TILE COLLISION pp->incVelocity(this,pp->getAccelerationX(), pp->getAccelerationY() + gravity); collideTestWithTiles(player, tL, &collisions); list<Bot*>::iterator botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); pp = bot->getPhysicalProperties(); pp->incVelocity(this, pp->getAccelerationX(), pp->getAccelerationY()); if(pp->isGravAffected() == true) pp->incVelocity(this, 0, gravity); collideTestWithTiles(bot, tL, &collisions); botIterator++; } //HERE, COLLIDE SPRITES WITH OTHER SPRITES collideTestWithSprites(game, player, &collisions); botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); if(bot->isCurrentlyCollidable() == true); collideTestWithSprites(game, bot, &collisions); botIterator++; } //SORT COLLISIONS collisions.sort(compare_collisionTime); //RESOLVING ALL THE COLLISIONS while(collisions.empty() == false) { Collision* currentCollision = collisions.front(); collisions.pop_front(); float colTime = currentCollision->getTOC(); CollidableObject* co1 = currentCollision->getCO1(); CollidableObject* co2 = currentCollision->getCO2(); if(colTime >= 0 && colTime <= 1) { pp = co1->getPhysicalProperties(); //pp->setVelocity(pp->getVelocityX()*9.99f,pp->getVelocityY()*9.99f); pp = co2->getPhysicalProperties(); //pp->setVelocity(pp->getVelocityX()*9.99f,pp->getVelocityY()*9.99f); pp = player->getPhysicalProperties(); pp->setPosition(pp->getX() + (pp->getVelocityX()*(colTime-timer)),pp->getY() + (pp->getVelocityY()*(colTime-timer))); botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); pp = bot->getPhysicalProperties(); pp->setPosition(pp->getX() + (pp->getVelocityX()*(colTime-timer)), pp->getY() + (pp->getVelocityY()*(colTime-timer))); botIterator++; } gsm->updateViewport(game, colTime-timer); resolveCollision(game, currentCollision); gR->gameSpecificResolve(game, currentCollision); boolean deleteLast = false; list<Collision*>::iterator cIterator = collisions.begin(); list<Collision*>::iterator lastIterator; while(cIterator != collisions.end()) { if(deleteLast == true) { collisions.erase(lastIterator); } deleteLast = false; Collision* check = (*cIterator); if(check->contains(co1) || check->contains(co2)) { CollidableObject* checkStatic = check->getCO2(); if(checkStatic->isStaticObject()) { coStackCounter ++; coStack[coStackCounter] = checkStatic; } collisionStackCounter ++; collisionStack[collisionStackCounter] = check; lastIterator = cIterator; deleteLast = true; } else { //check->calculateTimes(); } cIterator++; } if(deleteLast == true) { collisions.erase(lastIterator); } collideTestWithTiles(co1, tL, &collisions); collideTestWithSprites(game, co1, &collisions); if(co2->isStaticObject() == false) { collideTestWithTiles(co2, tL, &collisions); collideTestWithSprites(game, co2, &collisions); } collisions.sort(compare_collisionTime); timer += (colTime-timer); }//end if if(co2->isStaticObject() == true) { coStackCounter ++; coStack[coStackCounter] = co2; } collisionStackCounter ++; collisionStack[collisionStackCounter] = currentCollision; } if(timer < 1) { gsm->updateViewport(game, 1-timer); pp = player->getPhysicalProperties(); pp->setPosition(pp->getX() + (pp->getVelocityX()*(1-timer)),pp->getY() + (pp->getVelocityY()*(1-timer))); //pp->setVelocity(0.0f, pp->getVelocityY()); botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); pp = bot->getPhysicalProperties(); pp->setPosition(pp->getX() + (pp->getVelocityX()*(1-timer)), pp->getY() + (pp->getVelocityY()*(1-timer))); botIterator++; } gsm->updateViewport(game, 1-timer); } pp = player->getPhysicalProperties(); if(pp->getX() < 0) { pp->setX(0); } if(pp->getY() < 0) { pp->setY(0); } //pp->setVelocity(0.0f, pp->getVelocityY()); /*pp->setPosition(pp->getX() + pp->getVelocityX(), pp->getY() + pp->getVelocityY()); // FOR NOW THE PLAYER IS DIRECTLY CONTROLLED BY THE KEYBOARD, // SO WE'LL NEED TO TURN OFF ANY VELOCITY APPLIED BY INPUT // SO THE NEXT FRAME IT DOESN'T GET ADDED pp->setVelocity(0.0f, pp->getVelocityY()); // AND NOW MOVE ALL THE BOTS list<Bot*>::iterator botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); pp = bot->getPhysicalProperties(); pp->setPosition(pp->getX() + pp->getVelocityX(), pp->getY() + pp->getVelocityY()); botIterator++; }*/ }
//FOR NOW, TESTS SPRITES AGAINST ALL OTHER SPRITES. IF I HAVE TIME, I WILL IMPLEMENT SWEEP AND PRUNE void Physics::collideTestWithSprites(Game* game, CollidableObject* c, list<Collision*> *collisions) { SpriteManager *sm = game->getGSM()->getSpriteManager(); AnimatedSprite* player = sm->getPlayer(); if(c != player) { if(player->isCurrentlyCollidable() == true) { if(willObjectsCollide(player, c) == true) { Collision* currentCollision = collisionStack[collisionStackCounter]; collisionStackCounter --; currentCollision->setCO1(player); currentCollision->setCO2(c); currentCollision->calculateTimes(); if(currentCollision->getTOC() > 0 && currentCollision->getTOC() <= 1) { collisions->push_back(currentCollision); } else { collisionStackCounter ++; collisionStack[collisionStackCounter] = currentCollision; } }//end if }//end if }//end if else { list<Bot*>::iterator botIterator = sm->getBotsIterator(); while (botIterator != sm->getEndOfBotsIterator()) { Bot *bot = (*botIterator); if(c != bot && bot->isCurrentlyCollidable() == true) { if(willObjectsCollide(c, bot) == true) { Collision* currentCollision = collisionStack[collisionStackCounter]; collisionStackCounter --; currentCollision->setCO1(c); currentCollision->setCO2(bot); currentCollision->calculateTimes(); if(currentCollision->getTOC() > 0 && currentCollision->getTOC() <= 1) { collisions->push_back(currentCollision); } else { collisionStackCounter ++; collisionStack[collisionStackCounter] = currentCollision; } }//end if }//end if botIterator++; }//end while } /*Collision* currentCollision = collisionStack[collisionStackCounter]; collisionStackCounter --; currentCollision->setCO1(c); currentCollision->setCO2(tileCO); currentCollision->calculateTimes(); collisions->push_back(currentCollision);*/ }