３Ｄプログラミング入門講座・その４：基本総復習・実践

//下の関数が呼ばれる前にこれをしておく
if(x3domRuntime == undefined) x3domRuntime = document.getElementById('x3dom_ID名').runtime;

//lookat//注視
function viewp() {
  if(!x3domRuntime) return;
  var elm = document.getElementById('viewp001');

  var SWM = x3domRuntime.viewMatrix().inverse(); //ワールド回転行列取得
  var WM = new N6LMatrix().FromX3DOM(SWM);
  var Seye = SWM.multMatrixPnt(new x3dom.fields.SFVec3f(0, 0, 0)); //視点位置取得
  var sp = bx.ToX3DOM(true); //注視目標
  var Sat = x3dom.fields.SFVec3f.copy(sp);
  var lookat = new N6LVector([1.0, Sat.x, Sat.y, Sat.z], true); //注視目標セット
  var LAM = WM.LookAtMat2(lookat); //目的の関数
  var Vec = LAM.Vector();
  var ori = Vec.ToX3DOM();

  elm.setAttribute('position', Seye.toString());
  elm.setAttribute('orientation', ori.toString());
  //elm.setAttribute('centerOfRotation', sp.toString());
}

//オブジェクト位置情報
//位置4*4マトリクス(継続パラメータ)
var A = false;

//速度(継続パラメータ)
var V = 0.1;
var a = 0;
var pyr = new N6LVector([1, 0, 0, 0], true); 

//以上のように初期化してから、下の関数を呼び続ける

//加速度a,(スカラー量)(新規パラメータ) 
//ピッチヨーロール(1, θp, θy, θr)(新規パラメータ) 
function moveobj(wa, wpyr) {
  if(!A) {
    if(x3domRuntime) {
      var vm = x3domRuntime.viewMatrix().inverse(); //ワールド回転行列取得
      A = new N6LMatrix().FromX3DOM(vm);
    }
    else return;
  }

  var outmat = [];
  var outv = [];
  var WA = A.MoveMat(outmat, outv, new N6LVector(4, true).ZeroVec(), wpyr, V, wa, 0, 5); //目的の関数

  //値を適用
  V = outv[0].Abs();
  A = new N6LMatrix(WA);
  pyr = new N6LVector([1, 0, 0, 0], true);

  //x3domに適用
  var Vec = A.Vector();
  var pos = A.Pos();
  var eye = pos.ToX3DOM(true);
  var ori = Vec.ToX3DOM();

  var elm = document.getElementById('viewp001');
  elm.setAttribute('position', eye.toString());
  elm.setAttribute('orientation', ori.toString());
}

//キー入力
var KBLock7 = 0;
var KBLock9 = 0;
var KBIntvl = 5;
function chkKeyBoard(){
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N1'))]) {//N1Key
    pyr.x[3] -= 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N2'))]) {//N2Key
    pyr.x[1] -= 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N3'))]) {//N3Key
    pyr.x[3] += 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N4'))]) {//N4Key
    pyr.x[2] -= 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N5'))]) {//N5Key
    a = 0;
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N6'))]) {//N6Key
    pyr.x[2] += 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N7'))]) {//N7Key
    if(KBIntvl ＜ KBLock7) KBLock7 = 0;
    if(KBLock7 == 0) {
      a -= 0.005;
      if(a ＜ -0.5) a = -0.5;
    }
    KBLock7++;
  }
  else KBLock7 = 0;
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N8'))]) {//N8Key
    pyr.x[1] += 1 * (Math.PI / 180);
  }
  if(KeyB.keystate[KeyB.indexof(KeyB.ToReal('VK_N9'))]) {//N9Key
    if(KBIntvl ＜ KBLock9) KBLock9 = 0;
    if(KBLock9 == 0) {
      a += 0.005;
      if(0.5 ＜ a) a = 0.5;
    }
    KBLock9++;
  }
  else KBLock9 = 0;
};