JayFoxRox at 15:27, 24 May 2017

2017-05-24T15:27:42Z

JayFoxRox: Created page with "{{Game}} See https://github.com/aap/skygfx for a re-implementation of the Xbox graphics features for PC. This game shares some technical aspects with Grand Theft Auto III..."

2017-05-24T15:25:16Z

Created page with "{{Game}} See https://github.com/aap/skygfx for a re-implementation of the Xbox graphics features for PC. This game shares some technical aspects with Grand Theft Auto III..."

New page

{{Game}}
See https://github.com/aap/skygfx for a re-implementation of the Xbox graphics features for PC.

This game shares some technical aspects with [[Grand Theft Auto III]] and [[Grand Theft Auto: Vice City]].

== Reverse engineering by aap ==

aap has reverse engineered a lot for skygfx.
Some of these files might be for [[Grand Theft Auto III]] or [[Grand Theft Auto: Vice City]]. They come from a folder for all GTA research

=== Shader used for cars ===

==== Shader 1 ====

<pre>
; c14 0.0 0.5 1.0 2.0
; c26 specular
; c27 spec, fresnel, 0.6, power

dp4 r3.x, v0, c4
dp4 r3.y, v0, c5
dp4 r3.z, v0, c6
add r2.xyz, c12.xyzz, -r3.xyzz
dp3 r0.x, v1.xyzz, c4.xyzz
dp3 r2.w, r2.xyzz, r2.xyzz
+mov oD0.w, c14.z
dp3 r0.y, v1.xyzz, c5.xyzz
dp3 r0.z, v1.xyzz, c6.xyzz
+rsq r1.w, r2.w
mov r5.w, c14.w
mul r2.xyz, r2.xyzz, r1.w ; r2: normalized view vector
dp3 r0.w, r0.xyzz, r0.xyzz
add r4.xyz, r2.xyzz, -c13.xyzz
mov r11.w, c27.w
+rsq r1.w, r0.w
dp3 r4.w, r4.xyzz, r4.xyzz
mul r0.xyz, r0.xyzz, r1.w ; r0: normalized world normal
add r10.xyz, r2.xyzz, -c18.xyzz
mul r11.z, c27.w, r5.w
+rsq r1.w, r4.w
dp3 r4.w, r10.xyzz, r10.xyzz
add r9.yzw, r2.yyzx, -c19.yyzx
mul r4.xyz, r4.xyzz, r1.w
dp3 r4.w, r9.wyzz, r9.wyzz
+rsq r1.w, r4.w
add r8.xzw, r2.yyzx, -c20.yyzx
dp3 r10.w, r4.xyzz, r0.xyzz
mul r4.xyz, r10.xyzz, r1.w
+rsq r1.x, r4.w
dp3 r4.w, r8.wxzz, r8.wxzz
add r10.xyz, r2.xyzz, -c21.xyzz
max r11.x, r10.w, c14.x
+rsq r1.w, r4.w
dp3 r10.w, r4.xyzz, r0.xyzz
mul r4.xyz, r9.wyzz, r1.x
+lit r1.z, r11.xxxw
dp3 r4.w, r10.xyzz, r10.xyzz
max r11.y, r10.w, c14.x
dp3 r11.x, r4.xyzz, r0.xyzz
mul r4.xyz, r8.wxzz, r1.w
+rsq r1.x, r4.w
mul r8.xyz, r1.z, c26.xyzz ; direct light
mul r11.w, c27.w, r5.w
+lit r1.z, r11.yyyz
max r11.y, r11.x, c14.x
dp3 r11.x, r4.xyzz, r0.xyzz
mul r4.xyz, r10.xyzz, r1.x
dp4 r6.y, v0, c0
dp4 r6.z, v0, c1
dp4 r6.x, v0, c2
+dp4 oFog.x, v0, c2
mad r8.xyz, r1.z, c22.xyzz, r8.xyzz ; add extra 1
mul r11.w, c27.w, r5.w
+lit r1.z, r11.yyyw
max r11.y, r11.x, c14.x
+mov oPos.xyz, r6.yzxw
dp3 r11.x, r4.xyzz, r0.xyzz
dp4 oPos.w, v0, c3
mad r8.xyz, r1.z, c23.xyzz, r8.xyzz ; add extra 2
mul r11.w, c27.w, r5.w
+lit r1.z, r11.yyyw
max r11.y, r11.x, c14.x
+rcc r1.x, r12.w
mad r8.xyz, r1.z, c24.xyzz, r8.xyzz ; add extra 3
mul oPos.xyz, r12.xyzz, c-38.xyzz
+lit r1.z, r11.yyyw
mad oD0.xyz, r1.z, c25.xyzz, r8.xyzz ; add extra 4
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
</pre>

==== Shader 2 ====

<pre>
; v0 vertex
; v1 normal
; v2 tex coord
; c0 c1 c2 c3 worldviewproj matrix
; c4 c5 c6 world matrix
; c8 c9 texture matrix?
; c12 eye position
; c13 direct direction
; c14 0.0 0.5 1.0 2.0
; c15 ambient
; c16 color
; c17 direct color
; c18 c19 c20 c21 extra directions
; c22 c23 c24 c25 extra colors
; c26 specular
; c27 spec, fresnel, 0.6, power

dp3 r0.x, v1.xyzz, c4.xyzz
dp3 r0.y, v1.xyzz, c5.xyzz
dp3 r0.z, v1.xyzz, c6.xyzz
dp4 r3.x, v0, c4
dp3 r0.w, r0.xyzz, r0.xyzz
+mov oT0.xy, v2.xyyy
dp4 r3.y, v0, c5
dp4 r3.z, v0, c6
+rsq r1.w, r0.w
add r2.xyz, c12.xyzz, -r3.xyzz
mul r0.xyz, r0.xyzz, r1.w ; r0.xyz: normalized world-normal
dp3 r2.w, r2.xyzz, r2.xyzz
dp3 r0.w, r0.xyzz, -c13.xyzz
dp3 r11.w, r0.xyzz, -c18.xyzz
+rsq r1.w, r2.w
max r0.w, r0.w, c14.x
mul r2.xyz, r2.xyzz, r1.w ; r2: normalized world-view-vector
dp3 r7.x, r2.xyzz, r0.xyzz
mul r8.xyz, r0.w, c16.xyzz ; direct color
max r5.x, r7.x, c14.x
mov r11.xyz, c16
+mov oD0.w, c16
max r0.w, r11.w, c14.x
dp3 r11.w, r0.xyzz, -c19.xyzz
mul r6.x, r7.x, c14.w
add r5.x, c14.z, -r5.x
mad r8.xyz, c15.xyzz, r11.xyzz, r8.xyzz ; add ambient color
mul r6.yzw, r0.w, c22.yyzx
max r0.w, r11.w, c14.x
dp3 r11.w, r0.xyzz, -c20.xyzz
mad r11.xyz, r6.x, r0.xyzz, -r2.xyzz
mul r6.x, r5.x, r5.x
dp4 r10.y, v0, c0
dp4 r10.z, v0, c1
dp4 r10.x, v0, c2
+dp4 oFog.x, v0, c2
mad r8.xyz, r6.wyzz, c16.xyzz, r8.xyzz ; add extra light 1
mul r6.yzw, r0.w, c23.yyzx
+mov oPos.xyz, r10.yzxw
max r0.w, r11.w, c14.x
dp3 r0.x, r0.xyzz, -c21.xyzz
dp3 r11.x, r11.xyzz, c8.xyzz
mul r6.x, r6.x, r6.x
mov r11.w, c27.y
dp4 oPos.w, v0, c3
mad r8.xyz, r6.wyzz, c16.xyzz, r8.xyzz ; add extra light 2
mul r6.yzw, r0.w, c24.yyzx
+rcc r1.x, r12.w
max r0.w, r0.x, c14.x
dp3 r11.y, r11.xyzz, c9.xyzz
mul r5.x, r5.x, r6.x
add r7.x, c14.z, -r11.w
mad r8.xyz, r6.wyzz, c16.xyzz, r8.xyzz ; add extra light 3
mul r6.xyz, r0.w, c25.xyzz
mul r11.yw, r11.yyyx, c14.y
mad r5.x, r7.x, r5.x, c27.y
mul oPos.xyz, r12.xyzz, c-38.xyzz
mad oD0.xyz, r6.xyzz, c16.xyzz, r8.xyzz ; add extra light 4
add oT1.xy, r11.wyyy, c14.y
mul oD1, r5.x, c27.x
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
</pre>

=== Gloss shader ===

<pre>
; v0 vertex pos
; v2 tex coord
; c0-c3 matrix
; c4-c7 world matrix
; c12 eye position
; c13 light direction
; c26 pipeline data...
; c27 0, 0, 0, 8.0
; c28 0, 0, 1, 1
; c29 0.5, 0.5, 0.5, 0.5

dp4 r3.x, v0, c4
dp4 r3.y, v0, c5
dp4 r3.z, v0, c6
add r2.xyz, c12.xyzz, -r3.xyzz
dp4 r6.x, v0, c0
dp3 r2.w, r2.xyzz, r2.xyzz
+mov oT0, v2
dp4 r6.y, v0, c1
dp4 r6.z, v0, c2
+rsq r1.w, r2.w
dp4 oPos.w, v0, c3
mul r2.xyz, r2.xyzz, r1.w ; r2: view vector
+mov oPos.xyz, r6
mov r5.xyz, c28.xyzz
+rcc r1.x, r12.w
add r4.xyz, r2.xyzz, c13.xyzz
mul oPos.xyz, r12.xyzz, c-38.xyzz
dp3 r4.w, r4.xyzz, r4.xyzz
+mov oFog.xyz, c26.xyzz
mad oD0.xyz, r5.xyzz, c29.xyzz, c29.xyzz
rsq r4.w, r4.w
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
mul r5.xyz, r4.xyzz, r4.w
mad oD1.xyz, r5.xyzz, c29.xyzz, c29.xyzz
</pre>

<pre>
typedef struct _D3DPixelShaderDef
{
DWORD PSAlphaInputs[8]; // Alpha inputs for each stage
00000000
00000000
00000000
cdc81010
DWORD PSFinalCombinerInputsABCD; // Final combiner inputs
130f0000
DWORD PSFinalCombinerInputsEFG; // Final combiner inputs (continued)
0d081c80
DWORD PSConstant0[8]; // C0 for each stage
DWORD PSConstant1[8]; // C1 for each stage
DWORD PSAlphaOutputs[8]; // Alpha output for each stage
00000000
00000000
00000000
000000c0
DWORD PSRGBInputs[8]; // RGB inputs for each stage
44450000
PS_REGISTER_V0
PS_INPUTMAPPING_EXPAND_NORMAL

PS_REGISTER_V1
PS_INPUTMAPPING_EXPAND_NORMAL
cdcd0000
PS_REGISTER_R1
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_R1
PS_INPUTMAPPING_SIGNED_IDENTITY
cdcd0000
cdcd0000
DWORD PSCompareMode; // Compare modes for clipplane texture mode
DWORD PSFinalCombinerConstant0; // C0 in final combiner
DWORD PSFinalCombinerConstant1; // C1 in final combiner
DWORD PSRGBOutputs[8]; // Stage 0 RGB outputs
000020d0
PS_REGISTER_R1
PS_COMBINEROUTPUT_AB_DOT_PRODUCT

PS_REGISTER_ZERO
000000d0
PS_REGISTER_R1
PS_COMBINEROUTPUT_AB_MULTIPLY
000000d0
000000d0
DWORD PSCombinerCount; // Active combiner count (Stages 0-7)
00011104
4
PS_COMBINERCOUNT_MUX_MSB
PS_COMBINERCOUNT_UNIQUE_C0
PS_COMBINERCOUNT_UNIQUE_C1
DWORD PSTextureModes; // Texture addressing modes
00000001
PS_TEXTUREMODES_PROJECT2D
DWORD PSDotMapping; // Input mapping for dot product modes
DWORD PSInputTexture; // Texture source for some texture modes
DWORD PSC0Mapping; // Mapping of c0 regs to D3D constants
DWORD PSC1Mapping; // Mapping of c1 regs to D3D constants
DWORD PSFinalCombinerConstants; // Final combiner constant mapping
} D3DPIXELSHADERDEF;
</pre>

=== San Andreas Car Shaders ===

These shaders are picked depending on the following flags:

<pre>
1 default
2 refl && !spec && lit
3 env && !lit
env && !spec && lit
4 spec && lit

5 refl && spec && lit
6 env && spec && lit
</pre>

==== Shader 1 ====

<pre>
; c0-3 matrix
; c4-6 world/normal matrix
; c13 direct color
; c14 0.7 0.7 0.7 1.0
; c15 ambient color
; c16 light direction
; c20 diff mat
; c21 amb mat
; c22 spec mat
; c32 0, 1, 0.5, 2
; c33 0.3 0.7 0.1 0.01

dp4 oPos.x, v0, c0
dp4 oPos.y, v0, c1
dp4 oPos.z, v0, c2
dp4 oPos.w, v0, c3
dp3 r0.y, v1, c5
dp3 r0.x, v1, c4
+mov oFog.x, r12.w
dp3 r0.z, v1, c6
mov r0.w, c20
+mov oT0, v2
mov r2, c15
dp3 r0.xyz, r0, -c16
mul oPos.xyz, r12, c-38
+rcc r1.x, r12.w
max r0.xyz, r0.xyzz, c32.x
min r0.xyz, r0.xyzz, c32.y
mul r0.xyz, r0, c13
mul r0.xyz, r0, c20
mad oD0, r2, c21, r0
mad oPos.xyz, r12, r1.x, c-37
</pre>

==== Shader 2 ====

<pre>
; v0 position
; v1 normal
; v2 tex coord
; c0-3 matrix
; c4-6 world/normal matrix
; c12 eye
; c13 direct color
; c14 0.7 0.7 0.7 1.0
; c15 ambient color
; c16 light direction
; c20 diff mat
; c21 amb mat
; c22 spec mat
; c32 0, 1, 0.5, 2
; c33 0.3 0.7 0.1 0.01

dp3 r0.x, v1.xyzz, c4.xyzz
dp3 r0.y, v1.xyzz, c5.xyzz
dp3 r0.z, v1.xyzz, c6.xyzz
dp4 oPos.w, v0, c3
dp3 r11.x, r0.xyzz, c8.xyzz
+mov oT0, v2
dp3 r11.y, r0.xyzz, c9.xyzz
+rcc r1.x, r12.w
dp3 r11.z, r0.xyzz, c10.xyzz
+mov oFog.x, r12.w
dp3 r0.w, r0.xyzz, -c16.xyzz
dp3 r11.w, r11.xyzz, r11.xyzz
max r0.x, r0.w, c32.x
min r0.x, r0.x, c32.y
+rsq r1.w, r11.w
mov r10.y, c32.y
mul r10.zw, r11.yyyx, r1.w
dp4 oPos.x, v0, c0
dp4 oPos.y, v0, c1
dp4 oPos.z, v0, c2
mul r0.xyz, r0.x, c13.xyzz
mul r0.xyz, r0.xyzz, c20.xyzz
mov r0.w, c20.w
mov r2, c15
dp3 r11.x, r10.wzyy, c24.xyzz
dp3 r11.y, r10.wzyy, c25.xyzz
mov r11.z, c32.y
mul oPos.xyz, r12.xyzz, c-38.xyzz
mad oD0, r2, c21, r0
mov oT1, r11.xyzz
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
</pre>

==== Shader 3 ====

<pre>
; v0 position
; v1 normal
; v2 tex coord
; c0-3 matrix
; c4-6 world/normal matrix
; c12 eye
; c13 direct color
; c14 0.7 0.7 0.7 1.0
; c15 ambient color
; c16 light direction
; c20 diff mat
; c21 amb mat
; c22 spec mat
; c32 0, 1, 0.5, 2
; c33 0.3 0.7 0.1 0.01

dp3 r0.x, v1.xyzz, c4.xyzz
dp3 r0.y, v1.xyzz, c5.xyzz
dp3 r0.z, v1.xyzz, c6.xyzz
dp4 oPos.w, v0, c3
dp3 r0.w, r0.xyzz, -c16.xyzz
+mov oT0, v2
mov r11.xz, v3.xxyy
+rcc r1.x, r12.w
max r0.x, r0.w, c32.x
+mov oFog.x, r12.w
mov r11.y, c32.y
min r0.x, r0.x, c32.y
dp4 oPos.x, v0, c0
dp4 oPos.y, v0, c1
dp4 oPos.z, v0, c2
mul r0.xyz, r0.x, c13.xyzz
mul r0.xyz, r0.xyzz, c20.xyzz
mov r0.w, c20.w
mov r2, c15
dp3 r10.w, r11.xzyy, c24.xyzz
dp3 r10.y, r11.xzyy, c25.xyzz
mov r10.z, v3.w
mul oPos.xyz, r12.xyzz, c-38.xyzz
mad oD0, r2, c21, r0
mov oT1, r10.wyzz
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
</pre>

==== Shader 4 ====

<pre>
; v0 position
; v1 normal
; v2 tex coord
; c0-3 matrix
; c4-6 world/normal matrix
; c12 eye
; c13 direct color
; c14 0.7 0.7 0.7 1.0
; c15 ambient color
; c16 light direction
; c20 diff mat
; c21 amb mat
; c22 spec mat
; c32 0, 1, 0.5, 2
; c33 0.3 0.7 0.1 0.01

dp4 r10.x, v0, c4
dp4 r10.y, v0, c5
dp4 r10.z, v0, c6
dp3 r11.x, v1.xyzz, c4.xyzz
add r0.xyz, -r10.xyzz, c12.xyzz
dp3 r11.y, v1.xyzz, c5.xyzz
dp3 r11.w, r0.xyzz, r0.xyzz
+mov oD0.w, c20.w
dp3 r11.z, v1.xyzz, c6.xyzz ; r11.xyz world normal
dp4 oPos.w, v0, c3
+rsq r1.x, r11.w
dp3 r4.x, r11.xyzz, -c16.xyzz ; diffuse factor
+mov oT0, v2
mul r0.xyz, r0.xyzz, r1.x ; r0.xyz view vector
+rcc r1.y, r12.w
mul r4.xyz, r4.x, c13.xyzz
+mov oFog.x, r12.w
add r2.xyz, r0.xyzz, -c16.xyzz
mul r4.xyz, r4.xyzz, c20.xyzz
dp3 r11.w, r2.xyzz, r2.xyzz
mul r4.xyz, r4.xyzz, c32.z
dp4 oPos.x, v0, c0
+rsq r1.x, r11.w
dp4 oPos.y, v0, c1
mul r2.xyz, r2.xyzz, r1.x ; r2.xyz spec vector
dp3 r3.x, r11.xyzz, r2.xyzz
dp4 oPos.z, v0, c2
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.xyz, r3.x, c14.xyzz
mul r3.xyz, r3.xyzz, c22.xyzz
mul r3.xyz, r3.xyzz, c32.z
add r0.xyz, r4.xyzz, r3.xyzz
mov r2.xyz, c15.xyzz
mad r0.xyz, r2.xyzz, c21.xyzz, r0.xyzz
mul oPos.xyz, r12.xyzz, c-38.xyzz
mov oD0.xyz, r0
mad oPos.xyz, r12.xyzz, r1.y, c-37.xyzz
</pre>

==== Shader 5 ====

<pre>
dp3 r11.x, v1.xyzz, c4.xyzz
dp3 r11.y, v1.xyzz, c5.xyzz
dp3 r11.z, v1.xyzz, c6.xyzz
dp4 r10.x, v0, c4
dp4 r10.y, v0, c5
dp4 r10.z, v0, c6
dp3 r4.x, r11.xyzz, -c16.xyzz
+mov oT0, v2
add r0.xyz, -r10.xyzz, c12.xyzz
dp3 r10.w, r11.xyzz, c8.xyzz
dp3 r11.w, r0.xyzz, r0.xyzz
+mov oD0.w, c20.w
dp3 r10.y, r11.xyzz, c9.xyzz
mul r4.xyz, r4.x, c13.xyzz
+rsq r1.x, r11.w
dp3 r10.z, r11.xyzz, c10.xyzz
mul r0.xyz, r0.xyzz, r1.x
add r2.xyz, r0.xyzz, -c16.xyzz
dp3 r11.w, r10.wyzz, r10.wyzz
dp3 r10.x, r2.xyzz, r2.xyzz
mul r4.xyz, r4.xyzz, c20.xyzz
+rsq r1.w, r11.w
dp4 oPos.w, v0, c3
+rsq r1.x, r10.x
mul r4.xyz, r4.xyzz, c32.z
mul r2.xyz, r2.xyzz, r1.x
+rcc r1.y, r12.w
mul r10.zw, r10.yyyw, r1.w
+mov oFog.x, r12.w
dp3 r3.x, r11.xyzz, r2.xyzz
mov r10.y, c32.y
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.xyz, r3.x, c14.xyzz
mul r3.xyz, r3.xyzz, c22.xyzz
mul r3.xyz, r3.xyzz, c32.z
dp4 oPos.x, v0, c0
dp4 oPos.y, v0, c1
dp4 oPos.z, v0, c2
add r0.xyz, r4.xyzz, r3.xyzz
mov r2.xyz, c15.xyzz
mad r0.xyz, r2.xyzz, c21.xyzz, r0.xyzz
dp3 r11.w, r10.wzyy, c24.xyzz
dp3 r11.y, r10.wzyy, c25.xyzz
+mov oD0.xyz, r0
mov r11.z, c32.y
mul oPos.xyz, r12.xyzz, c-38.xyzz
mov oT1, r11.wyzz
mad oPos.xyz, r12.xyzz, r1.y, c-37.xyzz
</pre>

==== Shader 6 ====

<pre>
; v0 position
; v1 normal
; v2 tex coord 1
; v3 tex coord 2
; c0-3 matrix
; c4-6 world/normal matrix
; c12 eye
; c13 direct color
; c14 0.7 0.7 0.7 1.0
; c15 ambient color
; c16 light direction
; c20 diff mat
; c21 amb mat
; c22 spec mat
; c32 0, 1, 0.5, 2
; c33 0.3 0.7 0.1 0.01

dp4 r10.x, v0, c4
dp4 r10.y, v0, c5
dp4 r10.z, v0, c6
dp3 r11.x, v1.xyzz, c4.xyzz
add r0.xyz, -r10.xyzz, c12.xyzz
dp3 r11.y, v1.xyzz, c5.xyzz
dp3 r11.w, r0.xyzz, r0.xyzz
+mov oD0.w, c20.w
dp3 r11.z, v1.xyzz, c6.xyzz ; r11 normal
dp4 oPos.w, v0, c3
+rsq r1.x, r11.w
dp3 r4.x, r11.xyzz, -c16.xyzz
+mov oT0, v2
mul r0.xyz, r0.xyzz, r1.x ; r0 view vector
+rcc r1.y, r12.w
mul r4.xyz, r4.x, c13.xyzz
+mov oFog.x, r12.w
add r2.xyz, r0.xyzz, -c16.xyzz
mul r4.xyz, r4.xyzz, c20.xyzz
dp3 r11.w, r2.xyzz, r2.xyzz
mul r4.xyz, r4.xyzz, c32.z ; r4 diffuse term
mov r10.zw, v3.yyyx
+rsq r1.x, r11.w
mov r10.y, c32.y
mul r2.xyz, r2.xyzz, r1.x
dp3 r3.x, r11.xyzz, r2.xyzz
dp4 oPos.x, v0, c0
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.x, r3.x, r3.x
mul r3.xyz, r3.x, c14.xyzz
mul r3.xyz, r3.xyzz, c22.xyzz
mul r3.xyz, r3.xyzz, c32.z ; r3 specular term
dp4 oPos.y, v0, c1
dp4 oPos.z, v0, c2
add r0.xyz, r4.xyzz, r3.xyzz
mov r2.xyz, c15.xyzz
mad r0.xyz, r2.xyzz, c21.xyzz, r0.xyzz
dp3 r11.w, r10.wzyy, c24.xyzz
dp3 r11.y, r10.wzyy, c25.xyzz
+mov oD0.xyz, r0
mov r11.z, v3.w
mul oPos.xyz, r12.xyzz, c-38.xyzz
mov oT1, r11.wyzz
mad oPos.xyz, r12.xyzz, r1.y, c-37.xyzz
</pre>

=== Shader used for grass ===

<pre>
dp4 oPos.w, v0, c3
dp4 oPos.x, v0, c0
dp4 oPos.y, v0, c1
+rcc r1.x, r12.w
dp4 oPos.z, v0, c2
mov oFog.x, r12.w
mul oPos.xyz, r12.xyzz, c-38.xyzz
mov oT0, v1
mov oD0, c20
mad oPos.xyz, r12.xyzz, r1.x, c-37.xyzz
</pre>

=== Pixelshader used for world objects (?) ===

<pre>
typedef struct _D3DPixelShaderDef
{
DWORD PSAlphaInputs[8]; // Alpha inputs for each stage
14181010
PS_REGISTER_V0
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_T0
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_ZERO
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_ZERO
PS_INPUTMAPPING_UNSIGNED_IDENTITY
dcd11010
PS_REGISTER_R0
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_C0
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_ZERO
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_ZERO
PS_INPUTMAPPING_UNSIGNED_IDENTITY
DWORD PSFinalCombinerInputsABCD; // Final combiner inputs
130c0300
PS_REGISTER_FOG
PS_CHANNEL_ALPHA

PS_REGISTER_R0

PS_REGISTER_FOG
DWORD PSFinalCombinerInputsEFG; // Final combiner inputs (continued)
00001c80
PS_REGISTER_R0
PS_CHANNEL_ALPHA

PS_FINALCOMBINERSETTING_CLAMP_SUM
DWORD PSConstant0[8]; // C0 for each stage
ffffffff
ffffffff
DWORD PSConstant1[8]; // C1 for each stage
DWORD PSAlphaOutputs[8]; // Alpha output for each stage
000000c0
PS_REGISTER_DISCARD

PS_REGISTER_R0
000000c0
PS_REGISTER_DISCARD

PS_REGISTER_R0
DWORD PSRGBInputs[8]; // RGB inputs for each stage
0804c149
PS_REGISTER_T0
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_V0
PS_INPUTMAPPING_UNSIGNED_IDENTITY

PS_REGISTER_C0
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_T1
PS_INPUTMAPPING_EXPAND_NORMAL
cdcc20cc
PS_REGISTER_R1
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_R0
PS_INPUTMAPPING_SIGNED_IDENTITY

PS_REGISTER_ZERO
PS_INPUTMAPPING_UNSIGNED_INVERT

PS_REGISTER_R0
PS_INPUTMAPPING_SIGNED_IDENTITY
DWORD PSCompareMode; // Compare modes for clipplane texture mode
DWORD PSFinalCombinerConstant0; // C0 in final combiner
DWORD PSFinalCombinerConstant1; // C1 in final combiner
DWORD PSRGBOutputs[8]; // Stage 0 RGB outputs
000000cd
PS_REGISTER_R1
PS_COMBINEROUTPUT_CD_MULTIPLY

PS_REGISTER_R0
PS_COMBINEROUTPUT_AB_MULTIPLY
00000c00
PS_REGISTER_R0
PS_COMBINEROUTPUT_AB_CD_SUM
DWORD PSCombinerCount; // Active combiner count (Stages 0-7)
00011102
2
PS_COMBINERCOUNT_MUX_MSB
PS_COMBINERCOUNT_UNIQUE_C0
PS_COMBINERCOUNT_UNIQUE_C1
DWORD PSTextureModes; // Texture addressing modes
00000021
PS_TEXTUREMODES_PROJECT2D
PS_TEXTUREMODES_PROJECT2D
DWORD PSDotMapping; // Input mapping for dot product modes
DWORD PSInputTexture; // Texture source for some texture modes
DWORD PSC0Mapping; // Mapping of c0 regs to D3D constants
ffffff00
DWORD PSC1Mapping; // Mapping of c1 regs to D3D constants
ffffffff
DWORD PSFinalCombinerConstants; // Final combiner constant mapping
000001ff
} D3DPIXELSHADERDEF;
</pre>

=== Xbox vertex formats ===

<pre>
0000XXXC 44443333 2222111 NNNNVVVV

V N:
1 0x34 D3DVSDT_PBYTE3
2 0x35 D3DVSDT_SHORT3
3 0x31 D3DVSDT_NORMSHORT3
4 0x16 D3DVSDT_NORMPACKED3 default normal
5 0x32 D3DVSDT_FLOAT3 default position

C:
0x40 D3DVSDT_D3DCOLOR
T1-4:
1 0x24 D3DVSDT_PBYTE2
2 0x25 D3DVSDT_SHORT2
3 0x21 D3DVSDT_NORMSHORT2
4 0x16 D3DVSDT_NORMPACKED3
5 0x22 D3DVSDT_FLOAT2 default

X: tangent? XXX is index of tex coord set - 1 that has the data
anything 0x16 D3DVSDT_NORMPACKED3
0x16 D3DVSDT_NORMPACKED3

default:
0 position
2 normal
3 color
9-C tex coords

skin:
stream 0
0 position
3 normal
4 color
5-8 tex coords
stream 1
1 weights D3DVSDT_PBYTEn
2 indices D3DVSDT_SHORTn

normmap:
40320000 ; vertex
40160001 ; normal
40220002 ; tex coords
40160003 ; ?
40160004 ; ?

40320000 ; vertex
40160001 ; normal
40400002 ; color
40220003 ; tex coords
40160004 ; ?
40160005 ; ?

20000000h
40320000h ; vertex 5
40160001h ; normal 4
40220002h ; tex coord
40400004h ; color 5
0FFFFFFFFh
</pre>

← Older revision		Revision as of 15:27, 24 May 2017
Line 3:		Line 3:

	This game shares some technical aspects with [[Grand Theft Auto III]] and [[Grand Theft Auto: Vice City]].		This game shares some technical aspects with [[Grand Theft Auto III]] and [[Grand Theft Auto: Vice City]].
		+
		+	At least some parts of the games source code have been leaked into the public.
		+	The source code was illegally offered for sale in the past.

	== Reverse engineering by aap ==		== Reverse engineering by aap ==

Grand Theft Auto: San Andreas - Revision history

JayFoxRox at 15:27, 24 May 2017

JayFoxRox: Created page with "{{Game}} See https://github.com/aap/skygfx for a re-implementation of the Xbox graphics features for PC. This game shares some technical aspects with Grand Theft Auto III..."