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