Engine Chams

[disco]

Posted by learn_more.




hooking this game shouldnt be a problem

call InitStuff preferrably at CG_R_LOADWORLDMAP
get trap_syscall pointer from dllEntry or pattern or whatever

other stuff should be straight-forward

end result should look like the attachment

int (__cdecl *trap_syscall)( int command, ... );

int _RegisterShader( char * name )
{
    return trap_syscall( CG_R_REGISTERSHADER, name );
}

void _LoadDynamicShader( const char *shadername, const char *shadertext )
{
    trap_syscall( CG_R_LOADDYNAMICSHADER, shadername, shadertext );
}



void InitStuff()
{
    _LoadDynamicShader( "lm_wall", "\
lm_wall\n\
{\n\
    nomipmaps\n\
    nofog\n\
    nopicmip\n\
    {\n\
        map *white\n\
        rgbGen entity\n\
        alphagen entity\n\
        blendFunc gl_src_alpha gl_one\n\
    }\n\
}\n" );

    _LoadDynamicShader( "lm_nowall", "\
lm_nowall\n\
{\n\
    nomipmaps\n\
    nofog\n\
    nopicmip\n\
    {\n\
        map *white\n\
        rgbGen const ( 0 0 0 )\n\
        blendFunc gl_dst_color gl_zero\n\
    }\n\
    {\n\
        map *white\n\
        rgbGen entity\n\
        depthWrite\n\
    }\n\
}\n" );

    _LoadDynamicShader( "lm_sfx", "\
lm_sfx\n\
{\n\
    nomipmaps\n\
    nofog\n\
    nopicmip\n\
    {\n\
        map $whiteimage\n\
        rgbGen const ( 1.0 1.0 1.0 )\n\
        alphaGen const 0.03\n\
        blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA\n\
    }\n\
}\n" );

    lm_first = _RegisterShader( "lm_wall" );
    lm_second = _RegisterShader( "lm_nowall" );
    sfxshader = _RegisterShader( "lm_sfx" );
}


int OnAddRefEntity( refEntity_t *re )
{
    if( body_recognition + setting_bEnemy )
    {
        refEntity_t cham;
        cham = *re;
        cham.renderfx = RF_DEPTHHACK|RF_NOSHADOW|RF_HILIGHT|RF_FORCENOLOD;
        re->renderfx = RF_HILIGHT|RF_NOSHADOW|RF_FORCENOLOD;
        cham.shaderRGBA[3] = 255;

        if( bEnemy )
        {
            cham.shaderRGBA[0] = 255;
            cham.shaderRGBA[1] = 0;
            cham.shaderRGBA[2] = 255;

            re->shaderRGBA[0] = 255;
            re->shaderRGBA[1] = 0;
            re->shaderRGBA[2] = 0;
        } else {
            cham.shaderRGBA[0] = 0;
            cham.shaderRGBA[1] = 0;
            cham.shaderRGBA[2] = 255;

            re->shaderRGBA[0] = 0;
            re->shaderRGBA[1] = 255;
            re->shaderRGBA[2] = 0;
        }
        
        cham.customShader = lm_first;
        re->customShader = lm_second;
        
        trap_syscall( CG_R_ADDREFENTITYTOSCENE, &cham );
    } else if( head_detection + setting_bEnemy )
    {
        //no truwalls for head, only bright colored :)
        re->renderfx = RF_HILIGHT|RF_NOSHADOW|RF_FORCENOLOD;

        if( bEnemy )
        {
            re->shaderRGBA[0] = 255;
            re->shaderRGBA[1] = 255;
            re->shaderRGBA[2] = 0;
        } else {
            re->shaderRGBA[0] = 0;
            re->shaderRGBA[1] = 255;
            re->shaderRGBA[2] = 255;
        }
        re->customShader = lm_second;
    } else if( weap_detected || pickup_detected )
    {
        if( !(re->renderfx & RF_DEPTHHACK) )        //dont want own weap white colored :)
        {
            refEntity_t cham;
            re->shaderRGBA[0] = 255;
            re->shaderRGBA[1] = 255;
            re->shaderRGBA[2] = 255;

            cham = *re;
            cham.renderfx |= RF_DEPTHHACK|RF_NOSHADOW|RF_HILIGHT|RF_FORCENOLOD;

            re->customShader = lm_second;
            cham.customShader = lm_first;
            cham.shaderRGBA[3] = 50;

            trap_syscall( CG_R_ADDREFENTITYTOSCENE, &cham );
        }
    }
    return trap_syscall( CG_R_ADDREFENTITYTOSCENE, re );
}

//  smoke and other crap like bullet impact removal (replaced with transparant white shader, so you can see what other players dont expect you to see)
int OnAddPolyToScene( qhandle_t hShader , int numVerts, const polyVert_t *verts )
{
    return trap_syscall( CG_R_ADDPOLYTOSCENE, sfxshader, numVerts, verts );
}