Flash: Inverse kinematics in external AS class

realised the following in IKManager reference: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/fl/ik/IKManager.html?filter_flash=cs5&filter_flashplayer=10.1&filter_air=2#eventSummary

Note: When referencing IKArmature objects within a document class, be sure to first check the frameConstructed event to ensure that all objects have been populated.

else IKManager.numArmatures = 0 and IKManager.trackAllArmatures(false) will not work.

the bad thing is frameConstructed runs every frame. so one way is to use a boolean variable to track and run the code once.

can also use ENTER_FRAME

eg.:

public function IK_MC() // constructor
  {
   trace("start ik");   
   
   IKManager.trackAllArmatures(false); // will not work
   this.addEventListener(Event.ENTER_FRAME, constructed);
  }
  function constructed(e:Event):void
  {
   //trace(IKManager.numArmatures);
   if(IKManager.numArmatures > 0 && !init)
   {
    IKManager.trackAllArmatures(false);
    
    var arm:IKArmature = IKManager.getArmatureByName("Armature_2");
    trace(arm);
    var arm2:IKArmature = IKManager.getArmatureAt(0);
    trace(arm2);
    init = true;
   }
  }

OpenGL: intro program

first program from red book chapter 1

create a new empty project in VS C++
download the GLUT headers + binaries. http://www.xmission.com/~nate/glut.html

#include <Windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "glut.h"
#include <stdlib.h>

static GLfloat spin = 0.0;

void init(void) 
{
   glClearColor (0.0, 0.0, 0.0, 0.0);
   glShadeModel (GL_FLAT);
}

void display(void)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glPushMatrix();
   glRotatef(spin, 0.0, 0.0, 1.0);
   glColor3f(1.0, 1.0, 1.0);
   glRectf(-25.0, -25.0, 25.0, 25.0);
   glPopMatrix();
   glutSwapBuffers();
}

void spinDisplay(void)
{
   spin = spin + 2.0;
   if (spin > 360.0)
      spin = spin - 360.0;
   glutPostRedisplay();
}

void reshape(int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}

void mouse(int button, int state, int x, int y) 
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(spinDisplay);
         break;
      case GLUT_MIDDLE_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(NULL);
         break;
      default:
         break;
   }
}

/* 
 *  Request double buffer display mode.
 *  Register mouse input callback functions
 */
int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
   glutInitWindowSize (400, 400); 
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   init ();
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape); 
   glutMouseFunc(mouse);
   glutMainLoop();
   return 0;
}