This program does a demonstration of specular lighting. It also uses two light channels to show the overlay of diffuse and specular light colors. A specified light object for a specular light can also act as a pseudo parallel light if used in the diffuse light channel. This property is used in the demo; the same light object (GX_LIGHT0) is applied to both channels.
| Function | Parameters | Description |
GXInitLightPos |
Position coordinate (x, y, z) | Appropriate value. |
GXInitSpecularDir |
Light direction (nx, ny, nz) | Appropriate value. |
GXInitLightShininess |
Shininess parameter | Various values from 4.0 through 256.0. |
GXSetNumChans |
Number of color channels. | 1, 2 |
GXSetChanCtrl |
Color channel ID | GX_COLOR0, GX_COLOR1. |
| Channel enable | Always GX_ENABLE. | |
| Ambient color source | Always GX_SRC_REG. | |
| Material color source | Always GX_SRC_REG. | |
| Light mask | GX_LIGHT0 for both channels. | |
| Diffusion function | GX_DF_NONE, GX_DF_CLAMP. | |
| Attenuation function | GX_AF_NONE, GX_AF_SPOT, GX_AF_SPEC. | |
GXSetChanAmbColor |
Color channel ID | GX_COLOR0, GX_COLOR1. |
| Material color | Only one color. | |
GXSetChanMatColor |
Color channel ID | GX_COLOR0, GX_COLOR1. |
| Material color | Only one color. |
End the test with START.
The Control Stick moves the light.
The C Stick rotates the object.
The B Button changes the model.
The L and R Buttons tune the shininess of specular light.
The Y Button changes the display mode in the following order: Specular only, diffuse only, specular/diffuse added, specular/diffuse blended.
Specular light color only.
Uses two color channels. Diffuse light color is added to specular light color.
None.
03/01/2006 Initial version.