The teapot.py example demonstrates using an additional display list in RAM_G and loading this into the render display list using the CMD_NEWLIST/CMD_ENDLIST commands to direct the coprocessor to write the display list to RAM_G rather than the render display list. Later in the code the coprocessor receives a CMD_CALLLIST command which will load the list from RAM_G.
This method is useful in the case where a part of display list is repeated or can be pre-rendered. The new list can be modular and used several times in the main code - the list could be written in such a way to repeat a widget several times on the screen where the start of the widget would be set by a VERTEX_TRANSLATE_X/VERTEX_TRANSLATE_Y in the main code to set the position.
Example code running.
This example works by creating a fixed size display list in RAM_G continaing VERTEX2F commands for each of the points in the teapot wire frame. To animate the teapot the list is modified by overwriting the list in RAM_G with new VERTEX2F commands before the coprocessor is asked to copy these into the render display list using a CMD_CALLLIST.
A "floating" image is loaded in the background which is also animated using a BITMAP_TRANSFORM_C which can move the image on the horizontal axis.
The format of the command call is as follows:
MPSSE example:
python teapot.py --connector ft232h
FT4222 example in single mode (--mode 0):
python teapot.py --connector ft4222module
FT4222 example in dual mode (--mode 1) or quad mode (--mode 2):
python teapot.py --connector ft4222module --mode 2
The example contains a single file which comprises all the demo functionality. Additional resources for the demo are in the assets directory
| File/Folder | Description |
|---|---|
| teapot.py | Example source code file |
| assets | Geometry and logos for demo |
| docs | Documentation support files |