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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/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1995-96 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ 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 SoShapeStyleElement class.
| It takes values from the following:
| SoDrawStyleElement
| SoComplexityTypeElement
| SoGLTextureEnabledElement
| SoLazyElement
| TransparencyType field of SoGLRenderAction
| CoordType of SoTextureCoordinateElement
| number and value of SoTransparencyElement
| isColorIndex from SoGLLazyElement
| to determine
| whether to use fast-path rendering, and
| which fast-path rendering code to use
|
| Author(s) : Alan Norton, Gavin Bell
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_SHAPE_STYLE_ELEMENT
#define _SO_SHAPE_STYLE_ELEMENT
#include <Inventor/elements/SoInt32Element.h>
#include <Inventor/elements/SoLazyElement.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoShapeStyleElement
//
// This elements stores some information shapes need to quickly
// determine whether or not they should render, and, if they should
// render, how they should render. Specifically, it stores:
//
// NeedNormals: TRUE if lighting is on
// NeedTexCoords: TRUE if texturing and texcoords not generated by GL
//
// MightNotRender: TRUE if:
// -- bounding box complexity
// -- invisible drawstyle
// -- render abort callback registered
//
//////////////////////////////////////////////////////////////////////////////
SoEXTENDER class SoShapeStyleElement : public SoElement {
SO_ELEMENT_HEADER(SoShapeStyleElement);
public:
//
// API USED BY SHAPES:
//
// Get a readable instance:
static const SoShapeStyleElement * get(SoState *state);
// Returns TRUE if shapes may not render for some reason:
SbBool mightNotRender() const { return delayFlags; }
// Returns TRUE if need normals:
SbBool needNormals() const { return needNorms; }
// Returns TRUE if need texture coordinates:
SbBool needTexCoords() const
{ return (texEnabled && (!texFunc)); }
// Returns a mask that can be used by the SoVertexPropertyCache
// class (see SoVertexProperty.h for the SoRenderInfo class) to
// quickly mask out the normal or texture coordinate cases if
// normals or texture coordinates aren't needed.
int getRenderCaseMask() const
{ return renderCaseMask; }
// API USED BY OTHER ELEMENTS:
static void setDrawStyle(SoState *state, int32_t value);
static void setComplexityType(SoState *state, int32_t value);
static void setTransparencyType(SoState *state, int32_t value);
static void setTextureEnabled(SoState *state, SbBool value);
static void setTextureFunction(SoState *state, SbBool value);
static void setLightModel(SoState *state, int32_t value);
// Set value is TRUE if either diffuse, transparency, or materialbinding
// are overridden; otherwise FALSE.
static void setOverrides(SoState *state, SbBool value);
static SbBool isScreenDoor(SoState *state);
SoINTERNAL public:
SbBool isTextureFunction() const
{return texFunc;}
virtual void init(SoState *state);
virtual SbBool matches(const SoElement *elt) const;
virtual void push(SoState *state);
virtual SoElement *copyMatchInfo() const;
static void initClass();
virtual void print(FILE *fp) const;
protected:
virtual ~SoShapeStyleElement();
private:
int delayFlags; // True if rendering might be delayed
SbBool needNorms;
SbBool texEnabled, texFunc;
int renderCaseMask;
};
#endif /* _SO_SHAPE_STYLE_ELEMENT */
|
