8:30 – 5:00 FP

• Working on how to chain matrices.
• Old-school:

• glRotatef(eyeOrient[0], 1, 0, 0);
  glRotatef(eyeOrient[2], 0, 1, 0);
  glTranslatef(eyePos[0], eyePos[1], eyePos[2]);
  
  // global world transformations
  glTranslatef(worldPos[0], worldPos[1], worldPos[2]);
  
  glRotatef(worldOrient[0], 1, 0, 0);
  glRotatef(worldOrient[1], 0, 1, 0);

• And How it’s done now:

• m3dLoadIdentity44(workingMatrix);
  m3dLoadIdentity44(worldMat);
  m3dLoadIdentity44(eyeMat);
  m3dLoadIdentity44(tmat);
  m3dLoadIdentity44(rmat1);
  m3dLoadIdentity44(rmat2);
  
  // handle eyepoint transformations
  m3dRotationMatrix44(rmat1, eyeOrient[0], 1, 0, 0);
  m3dRotationMatrix44(rmat2, eyeOrient[2], 0, 1, 0);
  m3dTranslationMatrix44(tmat, eyePos[0], eyePos[1], eyePos[2]);
  
  m3dMatrixMultiply44(eyeMat, rmat2, eyeMat);
  m3dMatrixMultiply44(eyeMat, rmat1, eyeMat);
  m3dMatrixMultiply44(eyeMat, tmat, eyeMat);
  
  // handle global world transformations
  m3dTranslationMatrix44(tmat, worldPos[0], worldPos[1], worldPos[2]);
  m3dRotationMatrix44(rmat1, worldOrient[0], 1, 0, 0);
  m3dRotationMatrix44(rmat2, worldOrient[1], 0, 1, 0);
  m3dMatrixMultiply44(worldMat, rmat1, rmat2);
  m3dMatrixMultiply44(worldMat, tmat, worldMat);
  
  // combine the eye and eorld xforms
  m3dMatrixMultiply44(workingMatrix, eyeMat, worldMat);

• Isn’t that better?
• Ok, cleaned things up a bit, and now I’ve got something I can live with:

• // global eye transformations
  modelViewMatrix.Rotate(eyeOrient[0], 1, 0, 0);
  modelViewMatrix.Rotate(eyeOrient[2], 0, 1, 0);
  modelViewMatrix.Translate(eyePos[0], eyePos[1], eyePos[2]);
  
  // global world transformations
  modelViewMatrix.Translate(worldPos[0], worldPos[1], worldPos[2]);
  
  modelViewMatrix.Rotate(worldOrient[0], 1, 0, 0);
  modelViewMatrix.Rotate(worldOrient[1], 0, 1, 0);

• Putting the stage and other bits in