/* $Id: stereo.c,v 1.1 2003/02/14 20:18:20 mcfletch Exp $ */ /* * Togl - a Tk OpenGL widget * Copyright (C) 1996-1997 Brian Paul and Ben Bederson * See the LICENSE file for copyright details. */ /* * $Log: stereo.c,v $ * Revision 1.1 2003/02/14 20:18:20 mcfletch * Switch to TOGL 1.6 (from CVS) which should support Tk 8.4 (and earlier versions as well) * * Revision 1.3 2001/12/20 13:59:31 beskow * Improved error-handling in togl.c in case of window creation failure * Added pkgIndex target to makefile * Updated documentation to reflect stubs-interface (Togl.html + new README.stubs) * Added tk8.4a3 headers * Removed obsolete Tk internal headers * * Revision 1.1.1.1 2001/02/15 16:32:28 beskow * imported sources * * Revision 1.1 1997/10/01 02:52:37 brianp * Initial revision * * * Revision 1.1 1997/9/28 21:23:50 Ben Evans * Initial revision based on double.c * */ #include "togl.h" #include #include #include #include /* * The following variable is a special hack that is needed in order for * Sun shared libraries to be used for Tcl. */ #ifdef SUN extern int matherr(); int *tclDummyMathPtr = (int *) matherr; #endif static GLuint FontBase; static float xAngle = 0.0, yAngle = 0.0, zAngle = 0.0; static GLfloat CornerX, CornerY, CornerZ; /* where to print strings */ static GLfloat scale = 1.0; /* * Togl widget create callback. This is called by Tcl/Tk when the widget has * been realized. Here's where one may do some one-time context setup or * initializations. */ void create_cb( struct Togl *togl ) { FontBase = Togl_LoadBitmapFont( togl, TOGL_BITMAP_8_BY_13 ); if (!FontBase) { printf("Couldn't load font!\n"); exit(1); } } /* * Togl widget reshape callback. This is called by Tcl/Tk when the widget * has been resized. Typically, we call glViewport and perhaps setup the * projection matrix. */ void reshape_cb( struct Togl *togl ) { int width = Togl_Width( togl ); int height = Togl_Height( togl ); float aspect = (float) width / (float) height; glViewport( 0, 0, width, height ); /* Set up projection transform */ glMatrixMode(GL_PROJECTION); glLoadIdentity(); glFrustum(-aspect, aspect, -1.0, 1.0, 1.0, 10.0); CornerX = -aspect; CornerY = -1.0; CornerZ = -1.1; /* Change back to model view transform for rendering */ glMatrixMode(GL_MODELVIEW); } /*static void print_string( const char *s )*/ static void print_string( char *s) { glCallLists( strlen(s), GL_UNSIGNED_BYTE, s ); } /* * Togl widget display callback. This is called by Tcl/Tk when the widget's * contents have to be redrawn. Typically, we clear the color and depth * buffers, render our objects, then swap the front/back color buffers. */ void display_cb( struct Togl *togl ) { char *ident; GLfloat eyeDist = 2.0; GLfloat eyeOffset = 0.05; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); /* Reset modelview matrix to the identity matrix */ glTranslatef(0.0, 0.0, -3.0); /* Move the camera back three units */ glScalef( scale, scale, scale ); /* Zoom in and out */ glRotatef(xAngle, 1.0, 0.0, 0.0); /* Rotate by X, Y, and Z angles */ glRotatef(yAngle, 0.0, 1.0, 0.0); glRotatef(zAngle, 0.0, 0.0, 1.0); glEnable( GL_DEPTH_TEST ); /* stereo right eye */ glMatrixMode(GL_PROJECTION); glLoadIdentity(); Togl_StereoFrustum(-1, 1, -1, 1, 1, 10, eyeDist, eyeOffset); glMatrixMode(GL_MODELVIEW); Togl_StereoDrawBuffer(GL_BACK_RIGHT); Togl_StereoClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); /* Front face */ glBegin(GL_QUADS); glColor3f(0.0, 0.7, 0.1); /* Green */ glVertex3f(-1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, 1.0); glVertex3f(1.0, -1.0, 1.0); glVertex3f(-1.0, -1.0, 1.0); /* Back face */ glColor3f(0.9, 1.0, 0.0); /* Yellow */ glVertex3f(-1.0, 1.0, -1.0); glVertex3f(1.0, 1.0, -1.0); glVertex3f(1.0, -1.0, -1.0); glVertex3f(-1.0, -1.0, -1.0); /* Top side face */ glColor3f(0.2, 0.2, 1.0); /* Blue */ glVertex3f(-1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, -1.0); glVertex3f(-1.0, 1.0, -1.0); /* Bottom side face */ glColor3f(0.7, 0.0, 0.1); /* Red */ glVertex3f(-1.0, -1.0, 1.0); glVertex3f(1.0, -1.0, 1.0); glVertex3f(1.0, -1.0, -1.0); glVertex3f(-1.0, -1.0, -1.0); glEnd(); /* stereo left eye */ glMatrixMode(GL_PROJECTION); glLoadIdentity(); Togl_StereoFrustum(-1, 1, -1, 1, 1, 10, eyeDist, -eyeOffset); glMatrixMode(GL_MODELVIEW); Togl_StereoDrawBuffer(GL_BACK_LEFT); Togl_StereoClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); /* Front face */ glBegin(GL_QUADS); glColor3f(0.0, 0.7, 0.1); /* Green */ glVertex3f(-1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, 1.0); glVertex3f(1.0, -1.0, 1.0); glVertex3f(-1.0, -1.0, 1.0); /* Back face */ glColor3f(0.9, 1.0, 0.0); /* Yellow */ glVertex3f(-1.0, 1.0, -1.0); glVertex3f(1.0, 1.0, -1.0); glVertex3f(1.0, -1.0, -1.0); glVertex3f(-1.0, -1.0, -1.0); /* Top side face */ glColor3f(0.2, 0.2, 1.0); /* Blue */ glVertex3f(-1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, 1.0); glVertex3f(1.0, 1.0, -1.0); glVertex3f(-1.0, 1.0, -1.0); /* Bottom side face */ glColor3f(0.7, 0.0, 0.1); /* Red */ glVertex3f(-1.0, -1.0, 1.0); glVertex3f(1.0, -1.0, 1.0); glVertex3f(1.0, -1.0, -1.0); glVertex3f(-1.0, -1.0, -1.0); glEnd(); glDisable( GL_DEPTH_TEST ); glLoadIdentity(); glColor3f( 1.0, 1.0, 1.0 ); glRasterPos3f( CornerX, CornerY, CornerZ ); glListBase( FontBase ); /*ident = Togl_Ident( togl ); if (strcmp(ident,"Single")==0) { print_string( "Single buffered" ); } else { print_string( "Double buffered" ); }*/ print_string( Togl_Ident( togl) ); Togl_SwapBuffers( togl ); } int setXrot_cb( struct Togl *togl, int argc, char *argv[] ) { Tcl_Interp *interp = Togl_Interp(togl); /* error checking */ if (argc != 3) { Tcl_SetResult( interp, "wrong # args: should be \"pathName setXrot ?angle?\"", TCL_STATIC ); return TCL_ERROR; } xAngle = atof( argv[2] ); /* printf( "before %f ", xAngle ); */ if ( xAngle < 0.0 ) { xAngle += 360.0; } else if ( xAngle > 360.0 ) { xAngle -= 360.0; } /* printf( "after %f \n", xAngle ); */ Togl_PostRedisplay( togl ); /* Let result string equal value */ strcpy( interp->result, argv[2] ); return TCL_OK; } int setYrot_cb( struct Togl *togl, int argc, char *argv[] ) { Tcl_Interp *interp = Togl_Interp(togl); /* error checking */ if (argc != 3) { Tcl_SetResult( interp, "wrong # args: should be \"pathName setYrot ?angle?\"", TCL_STATIC ); return TCL_ERROR; } yAngle = atof( argv[2] ); if ( yAngle < 0.0 ) { yAngle += 360.0; } else if ( yAngle > 360.0 ) { yAngle -= 360.0; } Togl_PostRedisplay(togl); /* Let result string equal value */ strcpy( interp->result, argv[2] ); return TCL_OK; } int getXrot_cb( ClientData clientData, Tcl_Interp *interp, int argc, char *argv[]) { sprintf( interp->result, "%d", (int)xAngle ); return TCL_OK; } int getYrot_cb( ClientData clientData, Tcl_Interp *interp, int argc, char *argv[]) { sprintf( interp->result, "%d", (int)yAngle ); return TCL_OK; } int scale_cb( struct Togl *togl, int argc, char *argv[] ) { Tcl_Interp *interp = Togl_Interp(togl); /* error checking */ if (argc != 3) { Tcl_SetResult( interp, "wrong # args: should be \"pathName scale ?value?\"", TCL_STATIC ); return TCL_ERROR; } scale = atof( argv[2] ); Togl_PostRedisplay(togl); /* Let result string equal value */ strcpy( interp->result, argv[2] ); return TCL_OK; } EXPORT(int,Stereo_Init)(Tcl_Interp *interp) { /* * Initialize Tcl, Tk, and the Togl widget module. */ #ifdef USE_TCL_STUBS if (Tcl_InitStubs(interp, "8.1", 0) == NULL) {return TCL_ERROR;} #endif #ifdef USE_TK_STUBS if (Tk_InitStubs(interp, "8.1", 0) == NULL) {return TCL_ERROR;} #endif if (Togl_Init(interp) == TCL_ERROR) { return TCL_ERROR; } /* * Specify the C callback functions for widget creation, display, * and reshape. */ Togl_CreateFunc( create_cb ); Togl_DisplayFunc( display_cb ); Togl_ReshapeFunc( reshape_cb ); /* * Make a new Togl widget command so the Tcl code can set a C variable. */ Togl_CreateCommand( "setXrot", setXrot_cb ); Togl_CreateCommand( "setYrot", setYrot_cb ); Togl_CreateCommand( "scale", scale_cb ); /* * Call Tcl_CreateCommand for application-specific commands, if * they weren't already created by the init procedures called above. */ Tcl_CreateCommand( interp, "getXrot", getXrot_cb, (ClientData)NULL, (Tcl_CmdDeleteProc *)NULL ); Tcl_CreateCommand( interp, "getYrot", getYrot_cb, (ClientData)NULL, (Tcl_CmdDeleteProc *)NULL ); return TCL_OK; }