8:30 – FP

• Started off the day with sprites. Here’s a starfield:
• 
• The neat thing about this is that the stars are handled as sprites, which means that it’s possible to handle text overlay with a shader now. I think that the way it could be done would be to create a single grid with all the characters and pass that to the vertex shader with the XY index and size of the letter. The vertex shader moves the texture so that the letter is centered and then passes off the texture and size to the fragment shader, which clips the output so only the particular letter is shown. Not going to do that yet, but it’s probably the first tool after I finish the book.
• Here’s a tutorial on how to make the text texture: http://nehe.gamedev.net/tutorial/2d_texture_font/18002/
• Worked my way through the pixBuffer/motion blur section, but I don’t think it’s worth incorporating into the framework.

8:00 – 6:00 FP

• Cleaning up the texture allocation scheme by going to a singleton class like Dprint. Nope, after looking into it, the glGenTextures is guaranteed to return unique handles to textures each time it’s called.
• Pretty picture:
• 
• Oh, boy, I get to redo my security form! I guess that’s what I’m spending the rest of the day on.
• But then the Internet broke, and I had my graphics book cached locally. Can’t work on forms. Darn.

8:00 –  4:30 FP

• Onward to the next chapter!
• Texture maps – we get to make shiny things…
• Adding a callback to the main window so that textures are released on closing.
• Textures are working! Going to make things a bit fancier tomorrow.
• 

8:30 – 5:30 FP

• Getting DrawableObject and subclasses to work
• No, working on formatting my resume for Jesse. This literally took 3 1/2 hours. I guess I’ll start after lunch
• More reasons not to use Flash any more.
• Stacking matrices are working just fine 🙂
• 

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

8:30 – 5:30 FP

• Hey, it’s my 2 month anniversary of my broken leg. On the whole, progress has been pretty good.
• Working out how to put all the matrix pieces of a shader system together.
• After flailing for pretty much most of the day, I discovered that I had set up the view frustum incorrectly, due to a typo. Most things work, but the viewframe isn’t reset ti identity each time through. I need to revisit how to set that up.
• This was the hint that clued me in, BTW. Yuck.
• 

8:00 – FP

• Built openGl frame for shader code in Fluid and got it compiling and running.
• Dprint currently works. I wonder if this will kill it…
• Got the whole thing working in FLTK. Behold, the Red Triangle of Progress!
• 

8:30 – 4:30 FP

• Starting the OpenGl SuperBible 5th Edition, which covers OpenGl 3.0+
• Hmm. Can’t check out code from svn http://oglsuperbible5.googlecode.com/svn/trunk/
• Here’s the useful SVN fix of the week: “SVN uses a few HTTP commands that not every web proxy and/or firewall understands, which can lead to errors. There is one thing that might fix this for you, and that is to use HTTPS instead of HTTP, because then the 
  connection is encrypted and any proxy/firewall in between can’t mess with the content. I checked, and the server provides HTTPS access, although that is not necessarily always the case. “
• Ok, after some heroic struggling with getting libraries to behave and dealing with static declarations, I can now draw a simple triangle. I’m going to try to do the same in FLTK now, since I’d like to get away from static libraries…
• Got a basic Shader Window framework compiled. Will test tomorrow.