What is described by the following?

We render into the back buffer that is not displayed. Subsequently, there is a buffer swap between the back buffer and the front buffer. An image will be displayed from the front buffer. 

When you click on the canvas of a WebGL application, window coordinates are returned. We need to convert these window coordinates to clip coordinates in the application. According to the following specification, what is the conversion equation for the x coordinate?

(0, h) --> (-1, -1)

x_w, y_w

:

Window coordinates

Which is NOT part of the "initShaders" function?

Which is NOT one of the six types of logical input defined in APIs of GKS/PHIGS?

What is described by the following?

This function triggers a buffer swap. This executes a function after a specified number of milliseconds. If we set a 0 value for the second parameter, it will generate buffer swaps as fast as possible (but may cause stack overflow). This function is used for our rotating square example. 

Which is NOT one of the three methods that identify objects on the display?

Who invented the first mouse?

The Sierpinski Gasket starts with a triangle. It connects bisectors of sides and removes the central triangle. This same process repeats. 

After four subdivisions,  which triangles of the following will be rendered? (One subdivision is the original triangle (one triangle) itself.)

The following shows an example of a swizzling operator. What will be the result of the following example?

vec4 a;

Which is NOT one of the convex polygons?