v_dimple.c

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

/* V_DIMPLE.DLL     External texture for 3D Dimples */

#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

#ifndef PI
#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_dimple.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]; }
#define VECSUM(a,b,c)   { c[0]=a[0]+b[0]; c[1]=a[1]+b[1]; c[2]=a[2]+b[2];}
#define VECSCALE(a,b,c) { c[0]=(a)*b[0]; c[1]=(a)*b[1]; c[2]=(a)*b[2];}


static double radius=0.3,depth=1.5;
static double x=1.0,y=1.0,z=1.0;

#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",
         &radius,&depth,&x,&y,&z);
 }
 return LoadAndCompileShader("v_dimple");
}

#if 0
long CALLBACK ExternalTextureMorph(
#else
long _ExternalTextureMorph(
#endif
 char *parameter_list, double mr){
 double mx,my,mz;
 double mradius,mdepth,mc[3];
 parameter_list++;
 sscanf(parameter_list,"%f %f  %f %f %f",
         &mradius,&mdepth,&mx,&my,&mz);
 radius=mradius+(radius-mradius)*mr;
 depth=mdepth+(depth-mdepth)*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
){
 vector result;
 alpha /= x;
 beta  /= y;
 gamma /= z;
 alpha=(alpha-floor(alpha))-0.5;
 beta=(beta-floor(beta))-0.5;
 gamma=(gamma-floor(gamma))-0.5;
 if(beta*beta+alpha*alpha+gamma*gamma < radius){
   VECCOPY((double)sc,colour)
   vNoise(result,alpha,beta,gamma);
   VECSCALE(depth,result,result)
   VECSUM(n,result,n)
   normalize(n);
 }
 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,"ScalingV",1.0/x,1.0/z,1.0/y);
 SetUniformVariable(tGLshaderID,"Radius",radius);
 SetUniformVariable(tGLshaderID,"Depth",depth);
 // 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;
}

BOOL CALLBACK DlgProc(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",
          &radius,&depth,&x,&y,&z);
 }
 if(DialogBox(hDLLinstance,MAKEINTRESOURCE(DLG_DIMPLE),hWnd,
              (DLGPROC)DlgProc) == FALSE)return Op;
 if(Op != NULL)CALL_FREE(Op);  /* free the old string */
 sprintf(szbuf,"# %.2f %.2f  %.2f %.2f %.2f",
          radius,depth,x,y,z);
 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 DlgProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam){
 char str[16];
 switch( msg ) {
   case WM_INITDIALOG:
     sprintf(str,"%.2f",radius);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_T1,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_T1,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",depth);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_T2,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_T2,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",x);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_XSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_XSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",y);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_YSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_YSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     sprintf(str,"%.2f",z);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_ZSCALE,WM_SETTEXT,0,(LPARAM)str);
     SendDlgItemMessage(hwnd,DLG_DIMPLE_ZSCALE,EM_LIMITTEXT,(WPARAM)12,0);
     CentreDialogOnScreen(hwnd);
     return TRUE;
   case WM_COMMAND:
     switch(LOWORD(wparam)){
        case IDCANCEL:
        case DLG_DIMPLE_CANCEL:
          EndDialog(hwnd,FALSE);
          return(TRUE);
        case IDOK:
        case DLG_DIMPLE_OK:
          if(GetDlgItemText(hwnd,DLG_DIMPLE_T1,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((radius=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_DIMPLE_T2,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((depth=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_DIMPLE_XSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((x=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_DIMPLE_YSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((y=atof(str)) == 0)EndDialog(hwnd,FALSE);
          if(GetDlgItemText(hwnd,DLG_DIMPLE_ZSCALE,str,10) == 0)
             EndDialog(hwnd,FALSE);
          if((z=atof(str)) == 0)EndDialog(hwnd,FALSE);
          EndDialog(hwnd,TRUE);
          return(TRUE);
        default:
          break;
      }
      break;
    default: break;
 }
 return FALSE;
}