[MetaHook]Studio Light Strength

Jerry小坏

by hzqst

1. 
   
2. #define R_STUDIOLIGHTING_SIG "\x51\xDB\x05\x2A\x2A\x2A\x2A\x8A\x4C\x24\x10\xB8\x01\x00\x00\x00\x84\xC8\xD9\x5C\x24\x00"
   
3. #define R_STUDIOLIGHTING_SIG_NEW "\x55\x8B\xEC\x51\xDB\x05\x2A\x2A\x2A\x2A\x8A\x4D\x10\xB8\x01\x00\x00\x00\x84\xC8\xD9\x5D\xFC"
   
4. 
   
5. #define STUDIO_NF_FULLBRIGHT  0x0004
   
6. 
   
7. typedef struct
   
8. {
   
9.     void (*R_StudioLighting)(float *lv, int bone, int flags, vec3_t normal);
   
10.         void (*R_StudioSetupLighting)(alight_t *plighting);
    
11. }studiofuncs_t;
    
12. 
    
13. studiofuncs_t gStudioFuncs;
    
14. 
    
15. void InstallHook(void)
    
16. {
    
17.         if(g_dwEngineBuildnum >= 5953)
    
18.                 gStudioFuncs.R_StudioLighting = (void (*)(float *, int, int, vec3_t))g_pMetaHookAPI->SearchPattern((void *)g_dwEngineBase, g_dwEngineSize, R_STUDIOLIGHTING_SIG_NEW, sizeof(R_STUDIOLIGHTING_SIG_NEW)-1);
    
19.         else
    
20.                 gStudioFuncs.R_StudioLighting = (void (*)(float *, int, int, vec3_t))g_pMetaHookAPI->SearchPattern((void *)g_dwEngineBase, g_dwEngineSize, R_STUDIOLIGHTING_SIG, sizeof(R_STUDIOLIGHTING_SIG)-1);
    
21. 
    
22.         g_pMetaHookAPI->InlineHook(gStudioFuncs.R_StudioLighting, R_StudioLighting, (void *&)gStudioFuncs.R_StudioLighting);  
    
23.         g_pMetaHookAPI->InlineHook(gStudioFuncs.R_StudioSetupLighting, R_StudioSetupLighting, (void *&)gStudioFuncs.R_StudioSetupLighting);  
    
24. }
    
25. 
    
26. int HUD_GetStudioModelInterface(int version, struct r_studio_interface_s **ppinterface, struct engine_studio_api_s *pstudio)
    
27. {
    
28.         gStudioFuncs.R_StudioSetupLighting = pstudio->StudioSetupLighting;
    
29. 
    
30.         InstallHook();
    
31. 
    
32.         return gExportFuncs.HUD_GetStudioModelInterface(version, ppinterface, pstudio);
    
33. }
    
34. 
    
35. alight_t g_savedLighting;
    
36. 
    
37. void R_StudioSetupLighting(alight_t *plighting)
    
38. {
    
39.         memcpy(&g_savedLighting, plighting, sizeof(alight_t));
    
40.         gStudioFuncs.R_StudioSetupLighting(plighting);
    
41. }
    
42. 
    
43. void R_StudioLighting(float *lv, int bone, int flags, vec3_t normal)
    
44. {
    
45.         if(flags & STUDIO_NF_FULLBRIGHT)
    
46.         {
    
47.                 //save the lighting strength at first.
    
48.                 int r_ambientlight = g_savedLighting.ambientlight;
    
49.                 float r_shadelight = g_savedLighting.shadelight;
    
50. 
    
51.                 //changed to whatever you want
    
52.                 g_savedLighting.ambientlight = 192;
    
53.                 g_savedLighting.shadelight = 128.0f;
    
54. 
    
55.                 //then call the original StudioSetupLighting to modify engine's r_ambientlight & r_shadelight.
    
56.                 gStudioFuncs.studioapi_StudioSetupLighting(&g_savedLighting);
    
57. 
    
58.                 //then call the original func the calculate the lighting value (lv)
    
59.                 gHookFuncs.R_StudioLighting(lv, bone, flags, normal);
    
60. 
    
61.                 //or you can just set *lv = 1 if you want it fullbright, if you do this way, there is no need to save or change the global lighting strength.
    
62.                 //*lv = 1;
    
63. 
    
64.                 //then set the lighting value back;
    
65.                 g_savedLighting.ambientlight = r_ambientlight;
    
66.                 g_savedLighting.shadelight = r_shadelight;
    
67. 
    
68.                 //then call the original StudioSetupLighting to set engine's r_ambientlight & r_shadelight back.
    
69.                 gStudioFuncs.studioapi_StudioSetupLighting(&g_savedLighting);
    
70.                 return;
    
71.         }
    
72. 
    
73.         //nothing to do, just do the original way.
    
74.         gHookFuncs.R_StudioLighting(lv, bone, flags, normal);
    
75. }
    

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