shader_transparent_chicago_extended

Edit Halo 1

Transparent chicago extended shaders are essentially identical to shader_transparent_chicago, but have an additional 2-stage block used when video hardware does not support more than 2 maps in a shader (which can be simulated with arguments). There is no reason to use this shader type over shader_transparent_chicago on modern systems.

See shader_transparent_chicago for more documentation.

Structure and fields

This tag inherits fields from shader which are not shown here. See the parent's page for more information. The following information is unique to the shader_transparent_chicago_extended tag.

Field Type Comments
numeric counter limit uint8
shader transparent chicago extended flags bitfield
Flag Mask Comments
alpha tested 0x1
decal 0x2
two sided 0x4
first map is in screenspace 0x8
draw before water 0x10
ignore effect 0x20
scale first map with distance 0x40
numeric 0x80
first map type enum
Option Value Comments
2d map 0x0
first map is reflection cube map 0x1
first map is object centered cube map 0x2
first map is viewer centered cube map 0x3
framebuffer blend function enum
Option Value Comments
alpha blend 0x0
multiply 0x1
double multiply 0x2
add 0x3
subtract 0x4
component min 0x5
component max 0x6
alpha multiply add 0x7
framebuffer fade mode enum
Option Value Comments
none 0x0
fade when perpendicular 0x1
fade when parallel 0x2
framebuffer fade source enum
Option Value Comments
none 0x0
a out 0x1
b out 0x2
c out 0x3
d out 0x4
lens flare spacing float
  • Unit: world units
lens flare TagDependency: lens_flare
extra layers Block
  • HEK max count: 4

Warning: Using a shader with extra layers on an object with transparent self occlusion enabled causes Sapien to crash.
Field Type Comments
shader TagDependency: shader
maps 4 stage Block
  • HEK max count: 4
  • Max: 4
Field Type Comments
flags bitfield
Flag Mask Comments
unfiltered 0x1
alpha replicate 0x2
u clamped 0x4
v clamped 0x8
color function enum
Option Value Comments
current 0x0
next map 0x1
multiply 0x2
double multiply 0x3
add 0x4
add signed current 0x5
add signed next map 0x6
subtract current 0x7
subtract next map 0x8
blend current alpha 0x9
blend current alpha inverse 0xA
blend next map alpha 0xB
blend next map alpha inverse 0xC
alpha function enum?
map u scale float
map v scale float
map u offset float
map v offset float
map rotation float
mipmap bias float
  • Min: 0
  • Max: 1
map TagDependency: bitmap
u animation source enum?
u animation function enum
Option Value Comments
one 0x0
zero 0x1
cosine 0x2
cosine variable period 0x3
diagonal wave 0x4
diagonal wave variable period 0x5
slide 0x6
slide variable period 0x7
noise 0x8
jitter 0x9
wander 0xA
spark 0xB
u animation period float
  • Unit: seconds
  • Default: 1
u animation phase float
u animation scale float
  • Unit: world units
  • Default: 1
v animation source enum?
v animation function enum?
v animation period float
  • Unit: seconds
  • Default: 1
v animation phase float
v animation scale float
  • Unit: world units
  • Default: 1
rotation animation source enum?
rotation animation function enum?
rotation animation period float
  • Unit: seconds
  • Default: 1
rotation animation phase float
rotation animation scale float
  • Unit: degrees
  • Default: 360
rotation animation center Point2D
Field Type Comments
x float
y float
maps 2 stage Block?
  • HEK max count: 2
  • Max: 2

This block is used instead of maps 4 stage on older video hardware.
extra flags bitfield
Flag Mask Comments
don't fade active camouflage 0x1
numeric countdown timer 0x2

Acknowledgements

Thanks to the following individuals for their research or contributions to this topic:

  • Jakey (Explaining purpose of this tag)
  • Kavawuvi (Invader tag definitions)
  • MosesOfEgypt (Tag structure research)