0.3 Updates

Although the theory behind picking is known and understood, but the actual work for it seems much harder than I thought it'd be.

At first, I used trigonometry to calculate the projected vector from the point where the mouse was clicked on the canvas, and aimed it directly to the back of the scene. Before I read the documentations on the stages of transformation, I thought this had produced the correct vector. But now that understood the stages, what I have actually created was a vector in Perspective View. So, instead of using trig, I approached it differently and try converting the mouse coord through the different stages of transformation to get to 3D Space.

After following the steps to converting 3D coordinates from 2D:

1) Windows Coord -> NDC

2) NDC -> Viewspace

3) Viewspace -> Model

The results doesn't seem to look accurate. The math calculation done was double checked and they were correct, but it seems that the numbers used are performing incorrect transformations.

Since the existing benchmark was hard to test out the picking functionality, I have now created a custom Canvas 3D demo that's more suitable for testing it. Now, I can actually draw the testing scenario on paper, and actually have it tested out in the demo.