Chapter 3 Binary Format
3-20. EnvList

2. Env Area

The Env area is used for the environment settings of a scene. The Env area is mapped as follows.

u32 env_tag
u32 this_env_index
u32 env_size
u32 env_name_index
u32 fog
u32 fog_color
u32 fog_near
u32 fog_far
u32 fill_color
u32 fill_depth
u32 bg_sprite_img
u32 bg_sprite_depth
u32 nintendo_extension_block
u32 user_extension_block

Figure: Env Area Memory Map

u32 env_tag Tag indicating Env. Set the following
TAG_ENV	0x00100100
u32 this_env_index Index number of this Env
u32 env_size Size of this Env
u32 env_name_index Index number of Env name in NameList
u32 fog When FOG is used, set the following
ENV_FOG_USE	0x00000001

When FOG is not used, set the following.

ENV_FOG_NONE	0x00000000
u32 fog_color When FOG is used, set as 0xRRGGBBAA.
u32 fog_near Sets the starting position where Fog is displayed. Set the near clipping plane as 0 and the far clipping plane as 1000, then pick the value in between.
u32 fog_far Sets the saturation point of FOG. Set the near clipping plane as 0 and the far clipping plane as 1000, then pick the value in between.
u32 fill_color Sets the color for clearing the frame buffer. Specify as 0x00RRGGBB.

When the frame buffer is not cleared by the fill color, set the following:

FILL_COLOR_NONE	0xffffffff
u32 fill_depth Sets the color for clearing the Z buffer. Specify as 0x00RRGGBB.

When the Z buffer is not cleared by the fill color, specify the following:

FILL_DEPTH_NONE	0xffffffff
u32 bg_sprite_img Specifies the TexList index number of the texture image to be used in BG.

When a texture image is not used, specify:

BG_COLOR_IMG_NONE	0xffffffff
u32 bg_sprite_depth Specifies the TextList index number of the depth image to be used in BG.

When a depth image is not used, specify:

BG_DEPTH_IMG_NONE	0xffffffff
u32 nintendo_extension_block_size Nintendo extension block size
u32 user_extension_block_size User extension block size
NintendoExtensionBlock Nintendo extension block
UserExtensinoBlock User extension block