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/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
/**************************************************************************
* Copyright (C) 1991-94, Silicon Graphics, Inc. *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
**************************************************************************/
// -*- C++ -*-
/*
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the SoAsciiText node class.
|
| Author(s) : Chris Marrin, Gavin Bell
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_ASCIITEXT_
#define _SO_ASCIITEXT_
#include <Inventor/SbBox.h>
#include <Inventor/fields/SoMFString.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/nodes/SoShape.h>
#include <GL/gl.h> // For GLenum declaration
// GLU Library version dependency. Introduced with Iris 6.2.
#ifndef gluTESSELATOR
#if defined(__glu_h__) && (GLU_VERSION_1_2)
#define gluTESSELATOR GLUtesselator
#else
#define gluTESSELATOR GLUtriangulatorObj
extern "C" struct GLUtriangulatorObj;
#endif
#endif
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoAsciiText
//
// Specify 3D text for Vrml.
//
//////////////////////////////////////////////////////////////////////////////
class MyOutlineFontCache;
class SoPrimitiveVertex;
class SoTextureCoordinateElement;
// C-api: public=string,spacing,justification,width
class SoAsciiText : public SoShape {
SO_NODE_HEADER(SoAsciiText);
public:
enum Justification { // Justification types
LEFT = 0x01,
RIGHT = 0x02,
CENTER = 0x03
};
// Fields
SoMFString string; // the strings to display
SoSFFloat spacing; // interval between strings
SoSFEnum justification;
SoMFFloat width; // width of each string
// Constructor
SoAsciiText();
SoEXTENDER public:
virtual void GLRender(SoGLRenderAction *action);
virtual void rayPick(SoRayPickAction *action);
SoINTERNAL public:
static void initClass();
protected:
// Computes bounding box of text
virtual void computeBBox(SoAction *action, SbBox3f &box,
SbVec3f ¢er);
// Generates primitives
virtual void generatePrimitives(SoAction *);
virtual ~SoAsciiText();
private:
// Setup the internal font cache
SbBool setupFontCache(SoState *state, SbBool forRender = FALSE);
// Return bounding box of the fronts of all characters.
void getFrontBBox(SbBox2f &result);
// Extend a
// Figure out how much each line of text is offset (based on width
// of characters and justification)
SbVec2f getStringOffset(int line, float width);
// Render the fronts of the characters
void renderFront(SoGLRenderAction *action, const SbString &string,
float width, GLUtriangulatorObj *tobj);
// Creates a text detail when picking:
SoDetail * createTriangleDetail(SoRayPickAction *,
const SoPrimitiveVertex *,
const SoPrimitiveVertex *,
const SoPrimitiveVertex *,
SoPickedPoint *);
// Generates the fronts of the characters, by getting the outlines
// and calling the glu tesselation code:
void generateFront(const SbString &string, float width);
// Static callbacks invoked by the glu tesselation code:
static void beginCB(GLenum primType);
static void endCB();
static void vtxCB(void *vertex);
// Private data:
// MyOutlineFontCache is an internal, opaque class used to
// maintain gl display lists and other information for each
// character in a font.
MyOutlineFontCache *myFont;
// All this stuff is used while generating primitives:
static SoAsciiText *currentGeneratingNode;
static SoPrimitiveVertex *genPrimVerts[3];
static SbVec3f genTranslate;
static int genWhichVertex;
static uint32_t genPrimType;
static SoAction *genAction;
static SbBool genBack;
static SbBool genTexCoord;
static const SoTextureCoordinateElement *tce;
};
#endif /* _SO_ASCIITEXT_ */
|
