scummvm/actor.cpp

// Residual - Virtual machine to run LucasArts' 3D adventure games
// Copyright (C) 2003 The ScummVM-Residual Team (www.scummvm.org)
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA

#include "actor.h"
#include "engine.h"
#include "costume.h"
#include "sound.h"
#include "mixer.h"
#include <cmath>
#include <cstring>
#include <SDL.h>
#include <SDL_opengl.h>

Actor::Actor(const char *name) :
  name_(name), talkColor_(255, 255, 255), pos_(0, 0, 0),
  pitch_(0), yaw_(0), roll_(0), walkRate_(0), turnRate_(0),
  visible_(true), talkSound_(NULL), turning_(false), walking_(false)
{
  Engine::instance()->registerActor(this);
}

void Actor::turnTo(float pitch, float yaw, float roll) {
  pitch_ = pitch;
  roll_ = roll;
  if (yaw_ != yaw) {
    turning_ = true;
    destYaw_ = yaw;
  }
  else
    turning_ = false;
}

void Actor::walkTo(Vector3d p) {
  // For now, this is just the ignoring-boxes version (which afaict
  // isn't even in the original).  This will eventually need a
  // following-boxes version also.

  if (p == pos_)
    walking_ = false;
  else {
    walking_ = true;
    destPos_ = p;

    if (p.x() != pos_.x() || p.y() != pos_.y())
      turnTo(pitch_, yawTo(p), roll_);
  }
}

void Actor::walkForward() {
  float dist = Engine::instance()->perSecond(walkRate_);
  float yaw_rad = yaw_ * (M_PI / 180), pitch_rad = pitch_ * (M_PI / 180);
  Vector3d forwardVec(-std::sin(yaw_rad) * std::cos(pitch_rad),
		      std::cos(yaw_rad) * std::cos(pitch_rad),
		      std::sin(pitch_rad));
  pos_ += forwardVec * dist;
}

void Actor::turn(int dir) {
  float delta = Engine::instance()->perSecond(turnRate_) * dir;
  yaw_ += delta;
}

float Actor::angleTo(const Actor &a) const {
  float yaw_rad = yaw_ * (M_PI / 180);
  Vector3d forwardVec(-std::sin(yaw_rad), std::cos(yaw_rad), 0);
  Vector3d delta = a.pos() - pos_;
  delta.z() = 0;
  return angle(forwardVec, delta) * (180 / M_PI);
}

float Actor::yawTo(Vector3d p) const {
  Vector3d dpos = p - pos_;
  if (dpos.x() == 0 && dpos.y() == 0)
    return 0;
  else
    return std::atan2(-dpos.x(), dpos.y()) * (180 / M_PI);
}

void Actor::sayLine(const char *msg) {
  // For now, just play the appropriate sound if found.  Eventually,
  // this needs to handle possibly displaying text, starting up
  // appropriate talking chores, etc.

  // Find the message identifier
  if (msg[0] != '/')
    return;
  const char *secondSlash = std::strchr(msg + 1, '/');
  if (secondSlash == NULL)
    return;
  if (talkSound_)	// Only once line at a time, please :)
    shutUp();
  std::string msgId(msg + 1, secondSlash);
  talkSound_ = ResourceLoader::instance()->loadSound((msgId + ".wav").c_str());
  if (talkSound_ != NULL)
    Mixer::instance()->playVoice(talkSound_);

// FIXME: Ender - Disabled until I work out why the wrong Chores play
//  if (!costumeStack_.empty()) {
//    printf("Requesting talk chore\n");
//    costumeStack_.back()->playTalkChores();
//  }
}

bool Actor::talking() {
  if (talkSound_ == NULL)
    return false;
  if (talkSound_->done()) {
// FIXME: Ender - Disabled until I work out why the wrong Chores play
//    if (!costumeStack_.empty())
//      costumeStack_.back()->stopTalkChores();
    talkSound_ = NULL;
    return false;
  }
  return true;
}

void Actor::shutUp() {
    if (talkSound_) {
    	Mixer::instance()->stopVoice(talkSound_);
	talkSound_ = NULL;
    }
}

void Actor::pushCostume(const char *name) {
  Costume *newCost = ResourceLoader::instance()->
    loadCostume(name, currentCostume());
  costumeStack_.push_back(newCost);
}

void Actor::setCostume(const char *name) {
  if (! costumeStack_.empty())
    popCostume();
  pushCostume(name);
}

void Actor::popCostume() {
  if (! costumeStack_.empty()) {
    delete costumeStack_.back();
    costumeStack_.pop_back();
  }
}

void Actor::clearCostumes() {
  // Make sure to destroy costume copies in reverse order
  while (! costumeStack_.empty()) {
    delete costumeStack_.back();
    costumeStack_.pop_back();
  }
}

Costume *Actor::findCostume(const char *name) {
  for (std::list<Costume *>::iterator i = costumeStack_.begin();
       i != costumeStack_.end(); i++)
    if (std::strcmp((*i)->filename(), name) == 0)
      return *i;
  return NULL;
}

void Actor::update() {
  if (turning_) {
    float turnAmt = Engine::instance()->perSecond(turnRate_);
    float dyaw = destYaw_ - yaw_;
    while (dyaw > 180)
      dyaw -= 360;
    while (dyaw < -180)
      dyaw += 360;
    if (turnAmt >= std::abs(dyaw)) {
      yaw_ = destYaw_;
      turning_ = false;
    }
    else if (dyaw > 0)
      yaw_ += turnAmt;
    else
      yaw_ -= turnAmt;
  }

  if (walking_) {
    Vector3d dir = destPos_ - pos_;
    float dist = dir.magnitude();
    if (dist > 0)
      dir /= dist;
    float walkAmt = Engine::instance()->perSecond(walkRate_);
    if (walkAmt >= dist) {
      pos_ = destPos_;
      walking_ = false;
      turning_ = false;
    }
    else
      pos_ += dir * walkAmt;
  }

  for (std::list<Costume *>::iterator i = costumeStack_.begin();
       i != costumeStack_.end(); i++)
    (*i)->update();
}

void Actor::draw() {
  if (! costumeStack_.empty()) {
    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
    glTranslatef(pos_.x(), pos_.y(), pos_.z());
    glRotatef(yaw_, 0, 0, 1);
    glRotatef(pitch_, 1, 0, 0);
    glRotatef(roll_, 0, 1, 0);
    costumeStack_.back()->draw();
    glPopMatrix();
  }
}