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标题: [MetaHook]Studio Light Strength [打印本页]
作者: Jerry小坏    时间: 2017-7-14 16:47
标题: [MetaHook]Studio Light Strength

by hzqst

  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"

  5. #define STUDIO_NF_FULLBRIGHT  0x0004

  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;

  13. studiofuncs_t gStudioFuncs;

  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);

  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. }

  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;

  30.         InstallHook();

  32.         return gExportFuncs.HUD_GetStudioModelInterface(version, ppinterface, pstudio);
  33. }

  35. alight_t g_savedLighting;

  37. void R_StudioSetupLighting(alight_t *plighting)
  38. {
  39.         memcpy(&g_savedLighting, plighting, sizeof(alight_t));
  40.         gStudioFuncs.R_StudioSetupLighting(plighting);
  41. }

  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;

  51.                 //changed to whatever you want
  52.                 g_savedLighting.ambientlight = 192;
  53.                 g_savedLighting.shadelight = 128.0f;

  55.                 //then call the original StudioSetupLighting to modify engine's r_ambientlight & r_shadelight.
  56.                 gStudioFuncs.studioapi_StudioSetupLighting(&g_savedLighting);

  58.                 //then call the original func the calculate the lighting value (lv)
  59.                 gHookFuncs.R_StudioLighting(lv, bone, flags, normal);

  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;

  64.                 //then set the lighting value back;
  65.                 g_savedLighting.ambientlight = r_ambientlight;
  66.                 g_savedLighting.shadelight = r_shadelight;

  68.                 //then call the original StudioSetupLighting to set engine's r_ambientlight & r_shadelight back.
  69.                 gStudioFuncs.studioapi_StudioSetupLighting(&g_savedLighting);
  70.                 return;
  71.         }

  73.         //nothing to do, just do the original way.
  74.         gHookFuncs.R_StudioLighting(lv, bone, flags, normal);
  75. }
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