player.cpp

   1 #include <math.h>
   2 #include "player.h"
   3 #include "gravity.h"
   4
   5 Player::Player(Game* agame) {
   6         weapon = NULL;
   7     setPosition(40,40);
   8     setSpeed(0,0);
   9         game = agame;
  10         game->gravityManager->subscribe(this);
  11 }
  12
  13 void Player::equip(Weapon* aweapon) {
  14         //desequipar a anterior aqui mais tarde
  15         weapon = aweapon;
  16 }
  17
  18 Ponto Player::leftFeet() {
  19         Ponto pe(-10,0);
  20         return pe;
  21 }
  22
  23 Ponto Player::rightFeet() {
  24         Ponto pe(10,0);
  25         return pe;
  26 }
  27
  28 Ponto Player::leftArm() {
  29         if (weapon == NULL) {
  30                 Ponto braco(-10,-30);
  31                 return braco;
  32         }
  33         else
  34                 return weapon->getLeftHand();
  35 }
  36
  37 Ponto Player::rightArm() {
  38         if (weapon == NULL) {
  39                 Ponto braco(10,-30);
  40                 return braco;
  41         }
  42         else
  43                 return weapon->getRightHand();
  44 }
  45
  46 Ponto Player::cintura() {
  47     Ponto c(0,-30);
  48     return c;
  49 }
  50
  51 Ponto Player::pescoco() {
  52    Ponto neck(0,-60);
  53    return neck;
  54 }
  55
  56 double areaTriangle(double a, double b, double c) {
  57         if (a < b) std::swap(a,b);
  58         if (a < c) std::swap(a,c);
  59         if (b < c) std::swap(b,c);
  60         //a >= b >= c
  61
  62         return sqrt((a+(b+c))*(c-(a-b))*(c+(a-b))*(a+(b-c)))/4.0;
  63 }
  64
  65
  66 //retorna cotovelo em relacao ao ombro, usa matematica levemente pesada, cuidado ao mexer
  67 Ponto Player::getCotovelo(Ponto ombro, Ponto hand) {
  68         double a = tamanhoBraco();
  69         double b = tamanhoAntebraco();
  70         double d = distance(ombro,hand);
  71         double area = areaTriangle(a,b,d);
  72         double ylinha = 2.0*area/d;
  73         double xlinha = sqrt(a*a-ylinha*ylinha);
  74         double sinTheta = ylinha/a;
  75         double cosTheta = xlinha/a;
  76         Ponto ret;
  77         ret.x = -(cosTheta*xlinha-sinTheta*ylinha);
  78         ret.y = -(sinTheta*xlinha+cosTheta*ylinha);
  79         return ret;
  80 }
  81
  82 //cuidado, distancia da arma nao pode exceder tamanhoBraco+tamanhoAntebraco
  83 double Player::tamanhoBraco() {
  84         return 20.0;
  85 }
  86
  87 double Player::tamanhoAntebraco() {
  88         return 13.0;
  89 }
  90
  91 double Player::getAngle() {
  92         Ponto gameaim(aim.x+game->camera.x,aim.y+game->camera.y);
  93         Ponto gameneck(pescoco().x+getX(),pescoco().y+getY());
  94         double hyp = sqrt((gameaim.x-gameneck.x)*(gameaim.x-gameneck.x) +
  95                                           (gameaim.y-gameneck.y)*(gameaim.y-gameneck.y));
  96         if (gameaim.y <= gameneck.y)
  97                 return -acos((-gameaim.x+gameneck.x)/hyp);
  98         else
  99                 return acos((-gameaim.x+gameneck.x)/hyp);
 100 }
 101
 102 void Player::desenha() {
 103         game->desenhaMira(aim);
 104         glPushMatrix();
 105                 glTranslatef(getX(),getY(),0);
 106                 Ponto leftfeet = leftFeet();
 107                 Ponto rightfeet = rightFeet();
 108                 Ponto hips = cintura();
 109                 Ponto leftarm = leftArm();
 110                 Ponto rightarm = rightArm();
 111                 Ponto neck = pescoco();
 112                 glBegin(GL_LINES);
 113                         glVertex3f(hips.x,hips.y,0);
 114                         glVertex3f(neck.x,neck.y,0);
 115
 116                         glVertex3f(leftfeet.x,leftfeet.y,0);
 117                         glVertex3f(hips.x,hips.y,0);
 118
 119                         glVertex3f(rightfeet.x,rightfeet.y,0);
 120                         glVertex3f(hips.x,hips.y,0);
 121                 glEnd();
 122                 Ponto rightelbow = getCotovelo(neck,rightarm+neck);
 123                 Ponto leftelbow = getCotovelo(neck,leftarm+neck);
 124                 glPushMatrix();
 125                         glTranslatef(neck.x,neck.y,0);
 126                         glRotatef(getAngle()*180.0/PI,0,0,-1);
 127                         glBegin(GL_LINES);
 128                                 glVertex3f(0,0,0);
 129                                 glVertex3f(leftelbow.x,leftelbow.y,0);
 130                                 glVertex3f(leftelbow.x,leftelbow.y,0);
 131                                 glVertex3f(leftarm.x,leftarm.y,0);
 132
 133                                 glVertex3f(0,0,0);
 134                                 glVertex3f(rightelbow.x,rightelbow.y,0);
 135                                 glVertex3f(rightelbow.x,rightelbow.y,0);
 136                                 glVertex3f(rightarm.x,rightarm.y,0);
 137                         glEnd();
 138                         if (weapon != NULL) weapon->desenha();
 139                 glPopMatrix();
 140                 glPushMatrix();
 141                         glTranslatef(neck.x,neck.y-10,0);
 142                         drawCircle(10,30);
 143                 glPopMatrix();
 144         glPopMatrix();
 145 }
 146
 147
 148 Linha Player::getBaseLine() {
 149         Ponto leftfeet = leftFeet();
 150         Ponto rightfeet = rightFeet();
 151         Linha ret(leftfeet.x+getX(),leftfeet.y+getY(),rightfeet.x+getX(),rightfeet.y+getY());
 152         return ret;
 153 }
 154
 155 void Player::setAim(double x, double y) {
 156         aim.x = x;
 157         aim.y = y;
 158 }