---

panda/src/linmath/test_math.cxx

Go to the documentation of this file.

// Filename: test_math.cxx
// Created by:  drose (14Jan99)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#include "luse.h"
#include "lmatrix.h"
#include "compose_matrix.h"

#include <notify.h>
#include <stdlib.h>

void test() {
  LMatrix4f x = LMatrix4f::ident_mat();
  LMatrix4f y = LMatrix4f::ident_mat();

  LMatrix4f z = x * y;
}

int main(int argc, char *argv[]) {
  test();

  /*

  LOrientationf orientation; // = LQuaternionf::ident_quat();
  orientation.set(LMatrix4f::rotate_mat(-45.0f, LVector3f(0, 0, 1)));
  LRotationf rotation(LMatrix4f::rotate_mat(45.0f, LVector3f(0, 0, 1)));

  nout << "Orientation: " << orientation << endl;
  nout << "Rotation: " << rotation << endl;

  LQuaternionf composition = orientation * rotation;

  nout << "Composition (o * r): " << composition << endl;
  composition.normalize();
  nout << "Composition (after normalize): " << composition << endl;

  LPoint3f p(1, 0, 0);
  LMatrix4f m = LMatrix4f::ident_mat();

  composition.extract_to_matrix(m);
  cout << "Rotation => Matrix: " << m << endl;
  cout << "Point: " << p << endl;
  cout << "Matrix * Point: " << m * p << endl;
  */

  /*
  LMatrix4d x = LMatrix4d::ident_mat();
  LMatrix4d y = LMatrix4d::rotate_mat(90.0, LVector3d::up());
  LMatrix4d a = LMatrix4d::translate_mat(10.0, 10.0, 0.0f);

  nout << "x is " << x << "\ny is " << y << "\n"
       << "x * y is " << x * y << "\n"
       << "y * x is " << y * x << "\n"
       << "invert(x) is " << invert(x) << "\n"
       << "invert(y) is " << invert(y) << "\n"
       << "y * a is " << y * a << "\n"
       << "invert(y * a) is " << invert(y * a) << "\n"
       << "invert(invert(y * a)) is " << invert(invert(y * a)) << "\n"
       << "(y * a) * invert(y * a) is " << (y * a) * invert(y * a) << "\n"
       << "a * y is " << a * y << "\n"
       << "invert(a * y) is " << invert(a * y) << "\n"
       << "invert(invert(a * y)) is " << invert(invert(a * y)) << "\n";

  nout << "a is " << a << "\n"
       << "a * y is " << a * y << "\n"
       << "y * a is " << y * a << "\n";

  LVector3d r = LVector3d::right();
  nout << "r is " << r << "\n"
       << "r * x is " << r * x << "\n"
       << "r * y is " << r * y << "\n"
       << "r * invert(y) is " << r * invert(y) << "\n"
       << "r * a is " << r * a << "\n";

  LPoint3d p(0.0f, 1.0f, 1.0f);
  nout << "p is " << p << "\n"
       << "p * x is " << p * x << "\n"
       << "p * y is " << p * y << "\n"
       << "p * invert(y) is " << p * invert(y) << "\n"
       << "p * a is " << p * a << "\n";

  LVecBase4d q(0.0f, 1.0f, 1.0f, 1.0f);
  nout << "q is " << q << "\n"
       << "q * x is " << q * x << "\n"
       << "q * y is " << q * y << "\n"
       << "q * invert(y) is " << q * invert(y) << "\n"
       << "q * a is " << q * a << "\n";

  Normald v1(0,0,1), v2(1,1,1);
  Vertexd p1(1,0,1), p2(1,2,3);
  Colorf c1(1,1,1,1), c2(0,0,0,0);

  p2 = p2 - v1;

  nout << "v1 = " << v1
       << "\nv2 = " << v2
       << "\np1 = " << p1
       << "\np2 = " << p2
       << "\nc1 = " << c1
       << "\n(c1 == c2) = " << (c1 == c2)
       << "\n";

  {
    LVecBase3f hpr(0.0f, 0.0f, 0.0f);
    LVecBase3f scale(1.0f, 1.0f, 1.0f);

    if (argc > 3) {
      hpr.set(atof(argv[1]), atof(argv[2]), atof(argv[3]));
    }
    if (argc > 6) {
      scale.set(atof(argv[4]), atof(argv[5]), atof(argv[6]));
    }

    cerr << "< hpr = " << hpr << " scale = " << scale << "\n";
    LMatrix3f mat;
    compose_matrix(mat, scale, hpr);

    if (decompose_matrix(mat, scale, hpr)) {
      nout << "> hpr = " << hpr << " scale = " << scale << "\n";
    } else {
      nout << "Cannot decompose\n";
    }
  }
  */

  /*
  for (int p = -90; p < 90; p += 10) {
    for (int x = -10; x < 10; x += 5) {
      LVecBase3f hpr(0, p, 0);
      LVecBase3f xyz(x, x, x);
      LVecBase3f scale(1, 1, 1);
      nout << "\n< hpr = " << hpr << " xyz = " << xyz << "\n";
      LMatrix4f mat;
      compose_matrix(mat, scale, hpr, xyz);
      if (decompose_matrix(mat, scale, hpr, xyz)) {
        nout << "> hpr = " << hpr << " xyz = " << xyz << "\n";
      } else {
        nout << "Cannot decompose\n";
      }
    }
  }
  */

  return(0);
}

---