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/*-----------------------------------------------------------------
LOG
GEM - Graphics Environment for Multimedia
The state to pass among GEM objects
Copyright (c) 1997-2000 Mark Danks. mark@danks.org
Copyright (c) Günther Geiger. geiger@epy.co.at
Copyright (c) 2001-2002 IOhannes m zmoelnig. forum::für::umläute. IEM. zmoelnig@iem.kug.ac.at
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
-----------------------------------------------------------------*/
#ifndef INCLUDE_GEMSTATE_H_
#define INCLUDE_GEMSTATE_H_
#include "Base/GemExportDef.h"
#include "Base/GemGL.h"
struct pixBlock;
class TexCoord;
/*-----------------------------------------------------------------
-------------------------------------------------------------------
CLASS
TexCoord
DESCRIPTION
-----------------------------------------------------------------*/
class GEM_EXTERN TexCoord
{
public:
TexCoord() : s(0.f), t(0.f) { }
TexCoord(float s_, float t_) : s(s_), t(t_) { }
float s;
float t;
};
/*-----------------------------------------------------------------
-------------------------------------------------------------------
CLASS
GemState
The state to pass among GEM objects
DESCRIPTION
-----------------------------------------------------------------*/
class GEM_EXTERN GemState
{
public:
//////////
// Has something changed since the last time?
int dirty;
//////////
// Are we in a display list creation?
int inDisplayList;
//////////
// Lighting on?
int lighting;
//////////
// Smooth shading (flat is other type)
int smooth;
//////////
// Texture mapping on?
// 0..off
// 1..normalized texture
// 2..rectangle texture
int texture;
//////////
// The image to texture map
pixBlock *image;
//////////
// Texture coordinates.
// This can be NULL if there aren't any coordinates
TexCoord *texCoords;
//////////
// The number of TexCoords
int numTexCoords;
//////////
// The number of multiTexUnits
// default = 0, max = 7
int multiTexUnits;
//////////
// Milliseconds since last frame
// If in Stereoscopic mode, then it is the same number for both left
// and right renderings
float tickTime;
//////////////////
// the default draw-type (might be overriden within a Geo)
GLenum drawType;
//////////
// how deep is the current stack /* 4 fields for the 4 stacks */
int stackDepth[4];
////////////
//vertex-array data
int VertexDirty; // the vertex-arrays has changed
GLfloat *VertexArray;
int VertexArraySize;
int VertexArrayStride;
GLfloat *ColorArray;
int HaveColorArray;
GLfloat *NormalArray;
int HaveNormalArray;
GLfloat *TexCoordArray;
int HaveTexCoordArray;
//////////
// Constructor
GemState();
float texCoordX(int num) {
if (texture && numTexCoords > num)
return texCoords[num].s;
else return 0.;
}
float texCoordY(int num) {
if (texture && numTexCoords > num)
return texCoords[num].t;
else return 0.;
}
/* reset (parts of?) the GemState: to be called from [gemhead] */
void reset();
};
#endif // for header file
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