3D Light Commands
These are the commands which specifies the lighting conditions for any upcoming polygons and verticies.
Set Lights Directional Vector: Port 0x040004C8, Index 0x32, 1 Parameter
Sets the direction a given light points in.
Parameter Definition:
| Bit(s) | Description |
|---|---|
| 0-9 | X coordinate |
| 10-19 | Y coordinate |
| 20-29 | Z coordinate |
| 30-31 | Light Index (0..=3) |
all coordinate parameters are in the same format, as in: 1bit sign + 9 bit fraction.
Set Lights Color: Port 0x040004CC, Index 0x33, 1 Parameter
Sets the color of a given light.
Parameter Definition:
| Bit(s) | Description |
|---|---|
| 0-4 | Red |
| 5-9 | Green |
| 10-14 | Blue |
| 15-29 | Unused |
| 30-31 | Light Index (0..=3) |
Set Shininess table: Port 0x040004D0, Index 0x34, 32 Parameters
Sets the contents of a 128-byte shininess table used for specular reflections. transferred 4 entries (bytes) at a time. 0 = least shiny, 255 = most shiny.
Notes: When the shininess table is disabled, the Rendering Engine will act as if the table is filled with linearly increasing entries from the minimum to the maximum.