v_bozo.c

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/* --
OpenFX version 2.0 - Modelling, Animation and Rendering Package
Copyright (C) 2000 - 2007 OpenFX Development Team
-- */

/*    V_BOZO.C    External texture for 3D Basic Fractal texture           */
/*                                                                        */
/* This example demonstrates how to call the Renderer's noise generating  */
/* functions. These functions are invoked buy what looks like a normal    */
/* C function call. These "calls" are macros, the address of the function */
/* is passed to the library as part of the X__SHADER structure.          */
/* For ease of use and compatibility with C function calls appropriate    */
/* macros are defined in the file DEFINES.H which should be included in   */
/* the shader code. The X__SHADER structure is defined in the file       */
/* RSTRUCT.H                                                              */

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <float.h>
#include <windows.h>
#include <gl/gl.h>

#if __ZTC__ || __SC__
#ifndef max
#define max(a,b)  ( ((a) > (b)) ? (a) : (b) )
#endif
#endif

#if __WATCOMC__
#define PI 3.1415926
#endif

#if __X__MIPS__
BOOL WINAPI _CRT_INIT(HINSTANCE ,DWORD , LPVOID );
#endif

static HINSTANCE hDLLinstance=NULL;

#include "..\animate\memory.h" /* for memory definition */
#include "..\animate\memdef.h" /* local names           */
#include "defines.h"
#include "rstruct.h"
#include "v_bozo.h"


#if __WATCOMC__
int APIENTRY LibMain(HANDLE hDLL, DWORD dwReason, LPVOID lpReserved){
#else
BOOL WINAPI DllMain(HANDLE hDLL, DWORD dwReason, LPVOID lpReserved){
#endif
  HANDLE ghMod;
  switch (dwReason) {
    case DLL_PROCESS_ATTACH:
#if __X__MIPS__
      if(!_CRT_INIT(hDLL,dwReason,lpReserved))return(int)FALSE;
#endif
      hDLLinstance = hDLL;  /* handle to DLL file */
      break;
    case DLL_PROCESS_DETACH:
#if __X__MIPS__
      if(!_CRT_INIT(hDLL,dwReason,lpReserved))return(int)FALSE;
#endif
      break;
  }
  return (int)TRUE;
}

#if __SC__
#pragma startaddress(DllMain)
#endif

#define VECCOPY(a,b)    { b[0] = a[0]; b[1] = a[1]; b[2] = a[2]; }

static double turb=0.1,t1=0.4,t2=0.7,c[3]={255.0,255.0,0.0};
static double x=1.0,y=1.0,z=1.0;
static long   tr_type=0,tr_type1=0,tr_type2=0,tr_type3=0;

#if 0
long CALLBACK ExternalTextureStartup(
#else
long _ExternalTextureStartup(
#endif
  long frame,long nframes,char *parameter_list, X__SHADER *lpEVI){
 if(parameter_list[0] != '#'){
   MessageBox ( GetFocus(),
                (LPCTSTR) "External texture: Startup",
                (LPCTSTR) "Parameter list missing",
                MB_OK | MB_SYSTEMMODAL );
 }
 else {
  parameter_list++;
  sscanf(parameter_list,"%f %f %f  %f  %f %f  %f %f %f %ld %ld %ld %ld",
         &c[0],&c[1],&c[2],&turb,&t1,&t2,&x,&y,&z,
         &tr_type,&tr_type1,&tr_type2,&tr_type3);
 }
 return LoadAndCompileShader("v_bozo");

}

#if 0
long CALLBACK ExternalTextureMorph(
#else
long _ExternalTextureMorph(
#endif
 char *parameter_list, double mr){
 int i;
 double mx,my,mz;
 double mturb,mt1,mt2,mc[3];
 parameter_list++;
 sscanf(parameter_list,"%f %f %f  %f  %f %f  %f %f %f",
         &mc[0],&mc[1],&mc[2],&mturb,&mt1,&mt2,&mx,&my,&mz);
 t1=mt1+(t1-mt1)*mr;
 t2=mt2+(t2-mt2)*mr;
 turb=(turb-mturb)*mr;
 for(i=0;i<3;i++)c[i]=mc[i]+(c[i]-mc[i])*mr;
 x=mx+(x-mx)*mr;
 y=my+(y-my)*mr;
 z=mz+(z-mz)*mr;
 return 1;
}

#if 0
long CALLBACK ExternalTextureProcedure(
#else
long _ExternalTextureProcedure(
#endif
  long coord_type,  vector p, vector n,
  double alpha, double beta, double gamma,
  double bump,  double map_x,  double map_y,
  double *alpha_channel, unsigned char sc[3], double colour[3],
  double *reflectivity, double *transparency,
  X__SHADER *lpEVI
){
 double xx,yy,zz,noise;
 vector BozoTurbulence;
 xx=alpha / x;
 yy=beta  / y;
 zz=gamma / z;
 if(turb != 0.0){
   vTurbulence(BozoTurbulence, xx, yy, zz);
   xx += BozoTurbulence[0] * turb;
   yy += BozoTurbulence[1] * turb;
   zz += BozoTurbulence[2] * turb;
 }
 nNoise(xx, yy, zz, &noise);
 if (noise < t1){
   if(tr_type == 1){
     if(tr_type1 == 1)*transparency=1.0;
     else             *transparency=0.0;
   }
   return 1;
 }
 else if(noise < t2){
   colour[0]=(double)sc[0];
   colour[1]=(double)sc[1];
   colour[2]=(double)sc[2];
   if(tr_type == 1){
     if(tr_type2 == 1)*transparency=1.0;
     else             *transparency=0.0;
   }
 }
 else {
   colour[0]=c[0];
   colour[1]=c[1];
   colour[2]=c[2];
   if(tr_type == 1){
     if(tr_type3 == 1)*transparency=1.0;
     else             *transparency=0.0;
   }
 }
 return 1;
}

void _ExternalTextureClose(X__SHADER *lpEVI){
 UnloadCompiledShader(tGLshaderID);
}

long _ExternalTextureProcedureGL(
  double bump_scale,
  unsigned char sc[3],
  unsigned char ac[3],
  X__SHADER *lpEVI
){
 // Set any shader specific uniform variables here.
 SetUniformVector(tGLshaderID,"MaterialC",(GLfloat)ac[0]/255.0,(GLfloat)ac[1]/255.0,(GLfloat)ac[2]/255.0);
 SetUniformVector(tGLshaderID,"MC",(GLfloat)c[0]/255.0,(GLfloat)c[1]/255.0,(GLfloat)c[2]/255.0);
 SetUniformVector(tGLshaderID,"ScalingV",1.0/x,1.0/z,1.0/y);
 SetUniformVariable(tGLshaderID,"Turb",turb);
 SetUniformVariable(tGLshaderID,"T1",t1);
 SetUniformVariable(tGLshaderID,"T2",t2);
 SetUniformInteger(tGLshaderID,"Type",tr_type);
 SetUniformInteger(tGLshaderID,"Type1",tr_type1);
 SetUniformInteger(tGLshaderID,"Type2",tr_type2);
 SetUniformInteger(tGLshaderID,"Type3",tr_type3);
 // Callback to Render the Polygons - this allows for multiple passes - through same shaders
 // possibly with different parameters - including vertex offset - blending depth enabling 
 // to allow for multipass textures e.g. hair and fur (shell model) it's arguments must not be altered!!!
 DrawShadedPolygons(tmatpass,tpass,tprogID,tattrloc,tNface,tMainFp,tNvert,tMainVp);
 return 1;
}

void CentreDialogOnScreen(HWND hwnd){
 RECT rcDlg;
 long Xres,Yres;
 Yres=GetSystemMetrics(SM_CYSCREEN);
 Xres=GetSystemMetrics(SM_CXSCREEN);
 GetWindowRect(hwnd,&rcDlg);
 OffsetRect(&rcDlg,-rcDlg.left,-rcDlg.top);
 OffsetRect(&rcDlg,(Xres-rcDlg.right)/2,(Yres-rcDlg.bottom)/2);
 SetWindowPos(hwnd,HWND_TOP,rcDlg.left,rcDlg.top,0,0,SWP_NOSIZE);
 return;
}

static void SetColour(double *colour, HWND parent){
 CHOOSECOLOR cc;
 static COLORREF CustColours[16]={
   RGB(255,255,255), RGB(239,239,239), RGB(223,223,223), RGB(207,207,207),
   RGB(191,191,191), RGB(175,175,175), RGB(159,159,159), RGB(143,143,143),
   RGB(127,127,127), RGB(111,111,111), RGB( 95, 95, 95), RGB( 79, 79, 79),
   RGB( 63, 63, 63), RGB( 47, 47, 47), RGB( 31, 31, 31), RGB( 15, 15, 15) };
 cc.lStructSize=sizeof(CHOOSECOLOR);
 cc.hwndOwner=parent;
 cc.rgbResult=RGB((BYTE)colour[0],(BYTE)colour[1],(BYTE)colour[2]);
 cc.lpCustColors=(LPDWORD)CustColours;
// cc.Flags=CC_FULLOPEN | CC_RGBINIT | CC_ENABLEHOOK;
 cc.Flags= CC_RGBINIT;
 cc.lCustData=(DWORD)0;
 if(ChooseColor(&cc)){
   colour[0]=(double)GetRValue(cc.rgbResult);
   colour[1]=(double)GetGValue(cc.rgbResult);
   colour[2]=(double)GetBValue(cc.rgbResult);
 }
}

BOOL CALLBACK BozoDlgProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam);

#if 0
char * CALLBACK SetExternalParameters(
#else
char * _SetExternalParameters(
#endif
  char *Op,                 /* string for the parameters                  */
  HWND hWnd,                /* parent window                              */
  X__MEMORY_MANAGER *lpEVI /* pointer to structure with memory functions */
                             ){
 char szbuf[255],*Op1;
 if(Op != NULL){  /* parameters exist so read them off the list */
   Op1=Op;
   Op1++;
   sscanf(Op1,"%f %f %f  %f  %f %f  %f %f %f %ld %ld %ld %ld",
          &c[0],&c[1],&c[2],&turb,&t1,&t2,&x,&y,&z,
          &tr_type,&tr_type1,&tr_type2,&tr_type3);
 }
 if(DialogBox(hDLLinstance,MAKEINTRESOURCE(DLG_BOZO),hWnd,
              (DLGPROC)BozoDlgProc) == FALSE)return Op;
 if(Op != NULL)CALL_FREE(Op);  /* free the old string */
 sprintf(szbuf,"# %.2f %.2f %.2f  %.2f  %.2f %.2f  %.2f %.2f %.2f %ld %ld %ld %ld",
          c[0],c[1],c[2],turb,t1,t2,x,y,z,tr_type,tr_type1,tr_type2,tr_type3);
 if((Op=(char *)CALL_MALLOC(strlen(szbuf)+1)) == NULL){
  MessageBox (GetFocus(),"External shader: Out of memory","Error",
                MB_OK|MB_TASKMODAL|MB_ICONSTOP);
   return NULL;
 }
 strcpy(Op,szbuf);
 return Op;
}

BOOL CALLBACK BozoDlgProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam){
 char str[16];
 switch( msg ) {
   case WM_INITDIALOG:
     sprintf(str,"%.2f",turb);
     SendDlgItemMessage(hwnd,DLG_BOZO_TURB,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_TURB,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",t1);
     SendDlgItemMessage(hwnd,DLG_BOZO_T1,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_T1,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",t2);
     SendDlgItemMessage(hwnd,DLG_BOZO_T2,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_T2,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",x);
     SendDlgItemMessage(hwnd,DLG_BOZO_XSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_XSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",y);
     SendDlgItemMessage(hwnd,DLG_BOZO_YSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_YSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",z);
     SendDlgItemMessage(hwnd,DLG_BOZO_ZSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_BOZO_ZSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     if(tr_type == 0)
        SendDlgItemMessage(hwnd,DLG_BOZO_SEMI,BM_SETCHECK,TRUE,0);
     else
        SendDlgItemMessage(hwnd,DLG_BOZO_SETT,BM_SETCHECK,TRUE,0);
     if(tr_type1 == 1)
        SendDlgItemMessage(hwnd,DLG_BOZO_CLEARC,BM_SETCHECK,TRUE,0);
     if(tr_type2 == 1)
        SendDlgItemMessage(hwnd,DLG_BOZO_CLEARS,BM_SETCHECK,TRUE,0);
     if(tr_type3 == 1)
        SendDlgItemMessage(hwnd,DLG_BOZO_CLEAR3,BM_SETCHECK,TRUE,0);
     CentreDialogOnScreen(hwnd);
     return TRUE;
   case WM_DRAWITEM:{
       LPDRAWITEMSTRUCT lpdis;
       HBRUSH   hbr,hbrold;
       BYTE r,g,b;
       lpdis=(LPDRAWITEMSTRUCT)lparam;
       if(lpdis->CtlID == DLG_BOZO_COLOUR){
         r=(BYTE)c[0]; g=(BYTE)c[1]; b=(BYTE)c[2];
         if(lpdis->itemState & ODS_SELECTED)
            InvertRect(lpdis->hDC,&(lpdis->rcItem));
         else{
           hbr=CreateSolidBrush(RGB(r,g,b));
           hbrold=SelectObject(lpdis->hDC,hbr);
           Rectangle(lpdis->hDC,lpdis->rcItem.left,lpdis->rcItem.top,
                         lpdis->rcItem.right,lpdis->rcItem.bottom);
           SelectObject(lpdis->hDC,hbrold);
           DeleteObject(hbr);
         }
       }
     }
     break;
   case WM_COMMAND:
     switch(LOWORD(wparam)){
        case DLG_BOZO_COLOUR:
          SetColour(c,hwnd);
          InvalidateRect(GetDlgItem(hwnd,DLG_BOZO_COLOUR),NULL,FALSE);
          break;
        case IDCANCEL:
        case DLG_BOZO_CANCEL:
          EndDialog(hwnd,FALSE);
          return(TRUE);
        case IDOK:
        case DLG_BOZO_OK:
          if(GetDlgItemText(hwnd,DLG_BOZO_TURB,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((turb=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_BOZO_T1,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((t1=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_BOZO_T2,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((t2=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_BOZO_XSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((x=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_BOZO_YSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((y=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_BOZO_ZSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((z=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(SendDlgItemMessage(hwnd,DLG_BOZO_SETT,BM_GETCHECK,0,0))
            tr_type=1; else tr_type=0;
          if(SendDlgItemMessage(hwnd,DLG_BOZO_CLEARC,BM_GETCHECK,0,0))
            tr_type1=1; else tr_type1=0;
          if(SendDlgItemMessage(hwnd,DLG_BOZO_CLEARS,BM_GETCHECK,0,0))
            tr_type2=1; else tr_type2=0;
          if(SendDlgItemMessage(hwnd,DLG_BOZO_CLEAR3,BM_GETCHECK,0,0))
            tr_type3=1; else tr_type3=0;
          EndDialog(hwnd,TRUE);
          return(TRUE);
        default:
          break;
      }
      break;
    default: break;
 }
 return FALSE;
}