C++ qglShadeModel函数代码示例

void
R_SetDefaultState(void)
{
	qglClearColor(1, 0, 0.5, 0.5);
	qglCullFace(GL_FRONT);
	qglEnable(GL_TEXTURE_2D);

	qglEnable(GL_ALPHA_TEST);
	qglAlphaFunc(GL_GREATER, 0.666);

	qglDisable(GL_DEPTH_TEST);
	qglDisable(GL_CULL_FACE);
	qglDisable(GL_BLEND);

	qglColor4f(1, 1, 1, 1);

	qglPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
	qglShadeModel(GL_FLAT);

	R_TextureMode(gl_texturemode->string);
	R_TextureAlphaMode(gl_texturealphamode->string);
	R_TextureSolidMode(gl_texturesolidmode->string);

	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	R_TexEnv(GL_REPLACE);

	if (qglPointParameterfEXT)
	{
		float attenuations[3];

		attenuations[0] = gl_particle_att_a->value;
		attenuations[1] = gl_particle_att_b->value;
		attenuations[2] = gl_particle_att_c->value;

		/* GL_POINT_SMOOTH is not implemented by some OpenGL
		   drivers, especially the crappy Mesa3D backends like
		   i915.so. That the points are squares and not circles
		   is not a problem by Quake II! */
		qglEnable(GL_POINT_SMOOTH);
		qglPointParameterfEXT(GL_POINT_SIZE_MIN_EXT,
				gl_particle_min_size->value);
		qglPointParameterfEXT(GL_POINT_SIZE_MAX_EXT,
				gl_particle_max_size->value);
		qglPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, attenuations);
	}

	if (qglColorTableEXT && gl_ext_palettedtexture->value)
	{
		qglEnable(GL_SHARED_TEXTURE_PALETTE_EXT);

		R_SetTexturePalette(d_8to24table);
	}
}

/*
======================
RB_SetDefaultGLState

This should initialize all GL state that any part of the entire program
may touch, including the editor.
======================
*/
void RB_SetDefaultGLState( void ) {
	int		i;

	RB_LogComment( "--- R_SetDefaultGLState ---\n" );

	qglClearDepth( 1.0f );
	qglColor4f (1,1,1,1);

	// the vertex array is always enabled
	qglEnableClientState( GL_VERTEX_ARRAY );
	qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
	qglDisableClientState( GL_COLOR_ARRAY );

	//
	// make sure our GL state vector is set correctly
	//
	memset( &backEnd.glState, 0, sizeof( backEnd.glState ) );
	backEnd.glState.forceGlState = true;

	qglColorMask( 1, 1, 1, 1 );

	qglEnable( GL_DEPTH_TEST );
	qglEnable( GL_BLEND );
	qglEnable( GL_SCISSOR_TEST );
	qglEnable( GL_CULL_FACE );
	qglDisable( GL_LIGHTING );
	qglDisable( GL_LINE_STIPPLE );
	qglDisable( GL_STENCIL_TEST );

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglDepthMask( GL_TRUE );
	qglDepthFunc( GL_ALWAYS );
 
	qglCullFace( GL_FRONT_AND_BACK );
	qglShadeModel( GL_SMOOTH );

	if ( r_useScissor.GetBool() ) {
		qglScissor( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
	}

	for ( i = glConfig.maxTextureUnits - 1 ; i >= 0 ; i-- ) {
		GL_SelectTexture( i );

		// object linear texgen is our default
		qglTexGenf( GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
		qglTexGenf( GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
		qglTexGenf( GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );
		qglTexGenf( GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR );

		GL_TexEnv( GL_MODULATE );
		qglDisable( GL_TEXTURE_2D );
		if ( glConfig.texture3DAvailable ) {
			qglDisable( GL_TEXTURE_3D );
		}
		if ( glConfig.cubeMapAvailable ) {
			qglDisable( GL_TEXTURE_CUBE_MAP_EXT );
		}
	}
}

/*
** GL_SetDefaultState
*/
void GL_SetDefaultState( void )
{
	qglClearDepth( 1.0f );

	qglCullFace(GL_FRONT);

	qglColor4f (1,1,1,1);

	// initialize downstream texture unit if we're running
	// in a multitexture environment
	if ( qglActiveTextureARB ) {
		GL_SelectTexture( 1 );
		GL_TextureMode( r_textureMode->string );
		GL_TexEnv( GL_MODULATE );
		qglDisable( GL_TEXTURE_2D );
		GL_SelectTexture( 0 );
	}

	qglEnable(GL_TEXTURE_2D);
	GL_TextureMode( r_textureMode->string );
	GL_TexEnv( GL_MODULATE );

	qglShadeModel( GL_SMOOTH );
	qglDepthFunc( GL_LEQUAL );

	// the vertex array is always enabled, but the color and texture
	// arrays are enabled and disabled around the compiled vertex array call
	qglEnableClientState (GL_VERTEX_ARRAY);

	//
	// make sure our GL state vector is set correctly
	//
	glState.glStateBits = GLS_DEPTHTEST_DISABLE | GLS_DEPTHMASK_TRUE;

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglDepthMask( GL_TRUE );
	qglDisable( GL_DEPTH_TEST );
	qglEnable( GL_SCISSOR_TEST );
	qglDisable( GL_CULL_FACE );
	qglDisable( GL_BLEND );

	qglColorMask( GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE );
	qglClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
	qglClearDepth( 1.0 );

	qglDrawBuffer( GL_FRONT );
#ifdef IOS
	qglClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT );
#else
	qglClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_ACCUM_BUFFER_BIT|GL_STENCIL_BUFFER_BIT );
#endif
	qglDrawBuffer( GL_BACK );
#ifdef IOS
	qglClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT );
#else
	qglClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_ACCUM_BUFFER_BIT|GL_STENCIL_BUFFER_BIT );
#endif
}

/*
** GL_SetDefaultState
*/
void GL_SetDefaultState( void )
{
	//qglClearColor (1,0, 0.5 , 0.5); // NeVo - fucking ugly color!
	qglClearColor (0,0,0,1);	// NeVo - clear to black
	qglCullFace(GL_FRONT);
	qglEnable(GL_TEXTURE_2D);

	qglEnable(GL_ALPHA_TEST);
	qglAlphaFunc(GL_GREATER, 0.666);

	qglDisable (GL_DEPTH_TEST);
	qglDisable (GL_CULL_FACE);
	qglDisable (GL_BLEND);

	qglColor4f (1,1,1,1);

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglShadeModel (GL_FLAT);

	GL_TextureMode( gl_texturemode->string );
	GL_TextureAlphaMode( gl_texturealphamode->string );
	GL_TextureSolidMode( gl_texturesolidmode->string );

	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	GL_TexEnv( GL_REPLACE );

	if ( qglPointParameterfEXT )
	{
		float attenuations[3];

		attenuations[0] = gl_particle_att_a->value;
		attenuations[1] = gl_particle_att_b->value;
		attenuations[2] = gl_particle_att_c->value;

		qglEnable( GL_POINT_SMOOTH );
		qglPointParameterfEXT( GL_POINT_SIZE_MIN_EXT, gl_particle_min_size->value );
		qglPointParameterfEXT( GL_POINT_SIZE_MAX_EXT, gl_particle_max_size->value );
		qglPointParameterfvEXT( GL_DISTANCE_ATTENUATION_EXT, attenuations );
	}

	if ( qglColorTableEXT && gl_ext_palettedtexture->value )
	{
		qglEnable( GL_SHARED_TEXTURE_PALETTE_EXT );

		GL_SetTexturePalette( d_8to24table );
	}

	GL_UpdateSwapInterval();
}

/*
** GL_SetDefaultState
*/
void GL_SetDefaultState( void )
{
	qglClearDepth( 1.0f );

	qglCullFace(GL_FRONT);

	qglColor4f (1,1,1,1);

	// initialize downstream texture unit if we're running
	// in a multitexture environment
	if ( qglActiveTextureARB ) {
		GL_SelectTexture( 1 );
		GL_TextureMode( r_textureMode->string );
		GL_TexEnv( GL_MODULATE );
		qglDisable( GL_TEXTURE_2D );
		GL_SelectTexture( 0 );
	}

	qglEnable(GL_TEXTURE_2D);
	GL_TextureMode( r_textureMode->string );
	GL_TexEnv( GL_MODULATE );

	qglShadeModel( GL_SMOOTH );
	qglDepthFunc( GL_LEQUAL );

	// the vertex array is always enabled, but the color and texture
	// arrays are enabled and disabled around the compiled vertex array call
	qglEnableClientState (GL_VERTEX_ARRAY);

	//
	// make sure our GL state vector is set correctly
	//
	glState.glStateBits = GLS_DEPTHTEST_DISABLE | GLS_DEPTHMASK_TRUE;

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglDepthMask( GL_TRUE );
	qglDisable( GL_DEPTH_TEST );
	qglEnable( GL_SCISSOR_TEST );
	qglDisable( GL_CULL_FACE );
	qglDisable( GL_BLEND );

#ifdef _NPATCH
	// If n-patches are supported, make sure they are disabled for now
	// Set the initial tesselation level and the interpolation modes
	if ( qglPNTrianglesiATI )
	{
		qglDisable( GL_PN_TRIANGLES_ATI );
		qglPNTrianglesiATI( GL_PN_TRIANGLES_POINT_MODE_ATI, GL_PN_TRIANGLES_POINT_MODE_CUBIC_ATI );
		qglPNTrianglesiATI( GL_PN_TRIANGLES_NORMAL_MODE_ATI, GL_PN_TRIANGLES_NORMAL_MODE_QUADRATIC_ATI );
		qglPNTrianglesiATI( GL_PN_TRIANGLES_TESSELATION_LEVEL_ATI, 3 );
	}
#endif // _NPATCH
}

/*
** GL_SetDefaultState
*/
void
GL_SetDefaultState(void)
{
	qglClearDepth(1.0f);

	qglCullFace(GL_FRONT);

	qglColor4f (1,1,1,1);

	/* initialize downstream texture unit if we're running
	 * in a multitexture environment */
	if(qglActiveTextureARB){
		GL_SelectTexture(1);
		GL_TextureMode(r_textureMode->string);
		GL_TexEnv(GL_MODULATE);
		qglDisable(GL_TEXTURE_2D);
		GL_SelectTexture(0);
	}

	qglEnable(GL_TEXTURE_2D);
	GL_TextureMode(r_textureMode->string);
	GL_TexEnv(GL_MODULATE);

	qglShadeModel(GL_SMOOTH);
	qglDepthFunc(GL_LEQUAL);

	/* the vertex array is always enabled, but the color and texture
	 * arrays are enabled and disabled around the compiled vertex array call */
	qglEnableClientState (GL_VERTEX_ARRAY);

	/*
	 * make sure our GL state vector is set correctly
	 *  */
	glState.glStateBits = GLS_DEPTHTEST_DISABLE | GLS_DEPTHMASK_TRUE;

	glState.vertexAttribsState = 0;
	glState.vertexAttribPointersSet = 0;
	glState.currentProgram = 0;
	qglUseProgramObjectARB(0);

	qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
	qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
	glState.currentVBO	= NULL;
	glState.currentIBO	= NULL;

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglDepthMask(GL_TRUE);
	qglDisable(GL_DEPTH_TEST);
	qglEnable(GL_SCISSOR_TEST);
	qglDisable(GL_CULL_FACE);
	qglDisable(GL_BLEND);
}

/*
** GL_SetDefaultState
*/
void GL_SetDefaultState( void )
{
	qglClearColor (1.0f, 0.0f, 0.5f, 0.5f);
	qglCullFace(GL_FRONT);
	qglEnable(GL_TEXTURE_2D);

	qglEnable(GL_ALPHA_TEST);
	qglAlphaFunc(GL_GREATER, 0.666f);

	qglDisable (GL_DEPTH_TEST);
	qglDisable (GL_CULL_FACE);
	qglDisable (GL_BLEND);

	qglColor4fv(colorWhite);

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglShadeModel (GL_FLAT);

	GL_TextureMode( gl_texturemode->string );
	GL_TextureAlphaMode( gl_texturealphamode->string );
	GL_TextureSolidMode( gl_texturesolidmode->string );

	qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
	qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);

	qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

	qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	GL_TexEnv( GL_REPLACE );

	if ( qglPointParameterfEXT && FLOAT_NE_ZERO(gl_ext_pointparameters->value))
	{
		float attenuations[3];

		attenuations[0] = gl_particle_att_a->value;
		attenuations[1] = gl_particle_att_b->value;
		attenuations[2] = gl_particle_att_c->value;

		qglEnable( GL_POINT_SMOOTH );
		qglPointParameterfEXT( GL_POINT_SIZE_MIN_EXT, gl_particle_min_size->value );
		qglPointParameterfEXT( GL_POINT_SIZE_MAX_EXT, gl_particle_max_size->value );
		qglPointParameterfvEXT( GL_DISTANCE_ATTENUATION_EXT, attenuations );
	}

	gl_swapinterval->modified = true;
	GL_UpdateSwapInterval();
}

void CMistyFog2::Render(CWorldEffectsSystem *system)
{
	if (mFadeAlpha <= 0.0)
	{
		return;
	}

	qglMatrixMode(GL_PROJECTION);
	qglPushMatrix();
    qglLoadIdentity ();
	MYgluPerspective (80.0,  1.0,  4,  2048.0);

	qglMatrixMode(GL_MODELVIEW);
	qglPushMatrix();
    qglLoadIdentity ();
    qglRotatef (-90,  1, 0, 0);	    // put Z going up
    qglRotatef (90,  0, 0, 1);	    // put Z going up
    qglRotatef (0,  1, 0, 0);
    qglRotatef (-90,  0, 1, 0);
    qglRotatef (-90,  0, 0, 1);

	qglDisable(GL_TEXTURE_2D);
	GL_State(GLS_SRCBLEND_SRC_ALPHA|GLS_DSTBLEND_ONE);
	qglShadeModel (GL_SMOOTH);

	qglColorPointer(4, GL_FLOAT, 0, mColors);
	qglEnableClientState(GL_COLOR_ARRAY);

	qglVertexPointer( 3, GL_FLOAT, 0, mVerts );
	qglEnableClientState(GL_VERTEX_ARRAY);

	if (qglLockArraysEXT) 
	{
		qglLockArraysEXT(0, MISTYFOG_HEIGHT*MISTYFOG_WIDTH);
	}
	qglDrawElements(GL_QUADS, (MISTYFOG_HEIGHT-1)*(MISTYFOG_WIDTH-1)*4, GL_UNSIGNED_INT, mIndexes);
	if ( qglUnlockArraysEXT ) 
	{
		qglUnlockArraysEXT();
	}

	qglDisableClientState(GL_COLOR_ARRAY);
//	qglDisableClientState(GL_VERTEX_ARRAY);	 backend doesn't ever re=enable this properly

	qglPopMatrix();
	qglMatrixMode(GL_PROJECTION);
	qglPopMatrix();
	qglMatrixMode(GL_MODELVIEW);	// bug somewhere in the backend which requires this
}

/*
==================
GL_SetDefaultState
==================
*/
void GL_SetDefaultState(void)
{
	qglClearDepth(1.0f);

	qglCullFace(GL_FRONT);

	qglColor4f(1, 1, 1, 1);

	// initialize downstream texture unit if we're running
	// in a multitexture environment
	if (qglActiveTextureARB)
	{
		GL_SelectTexture(1);
		GL_TextureMode(r_textureMode->string);
		GL_TexEnv(GL_MODULATE);
		qglDisable(GL_TEXTURE_2D);
		GL_SelectTexture(0);
	}

	qglEnable(GL_TEXTURE_2D);
	GL_TextureMode(r_textureMode->string);
	GL_TexEnv(GL_MODULATE);

	qglShadeModel(GL_SMOOTH);
	qglDepthFunc(GL_LEQUAL);

	// the vertex array is always enabled, but the color and texture
	// arrays are enabled and disabled around the compiled vertex array call
	qglEnableClientState(GL_VERTEX_ARRAY);

	// make sure our GL state vector is set correctly
	glState.glStateBits = GLS_DEPTHTEST_DISABLE | GLS_DEPTHMASK_TRUE;

	glPixelStorei(GL_PACK_ALIGNMENT, 1);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	//*SEB* ? not the best place !
	glLockArraysEXT   = NULL;
	glUnlockArraysEXT = NULL;

	qglDepthMask(GL_TRUE);
	qglDisable(GL_DEPTH_TEST);
	qglEnable(GL_SCISSOR_TEST);
	qglDisable(GL_CULL_FACE);
	qglDisable(GL_BLEND);
}

//.........这里部分代码省略.........
		qglLoadIdentity();
		qglScalef( -1, 1, 1 );
	    MYgluPerspective( r_newrefdef.fov_y, ( float ) r_newrefdef.width / r_newrefdef.height,  4,  4096);
		qglMatrixMode( GL_MODELVIEW );

		qglCullFace( GL_BACK );
	}

    qglPushMatrix ();
	e->angles[PITCH] = -e->angles[PITCH];	// sigh.
	R_RotateForEntity (e);
	e->angles[PITCH] = -e->angles[PITCH];	// sigh.

	// select skin
	if (currententity->skin)
		skin = currententity->skin;	// custom player skin
	else
	{
		if (currententity->skinnum >= MAX_MD2SKINS)
			skin = currentmodel->skins[0];
		else
		{
			skin = currentmodel->skins[currententity->skinnum];
			if (!skin)
				skin = currentmodel->skins[0];
		}
	}
	if (!skin)
		skin = r_notexture;	// fallback...
	GL_Bind(skin->texnum);

	// draw it

	qglShadeModel (GL_SMOOTH);

	GL_TexEnv( GL_MODULATE );
	if ( currententity->flags & RF_TRANSLUCENT )
	{
		qglEnable (GL_BLEND);
	}


	if ( (currententity->frame >= paliashdr->num_frames) 
		|| (currententity->frame < 0) )
	{
		ri.Con_Printf (PRINT_ALL, "R_DrawAliasModel %s: no such frame %d\n",
			currentmodel->name, currententity->frame);
		currententity->frame = 0;
		currententity->oldframe = 0;
	}

	if ( (currententity->oldframe >= paliashdr->num_frames)
		|| (currententity->oldframe < 0))
	{
		ri.Con_Printf (PRINT_ALL, "R_DrawAliasModel %s: no such oldframe %d\n",
			currentmodel->name, currententity->oldframe);
		currententity->frame = 0;
		currententity->oldframe = 0;
	}

	if ( !r_lerpmodels->value )
		currententity->backlerp = 0;
	GL_DrawAliasFrameLerp (paliashdr, currententity->backlerp);

	GL_TexEnv( GL_REPLACE );
	qglShadeModel (GL_FLAT);

void RB_StageIteratorLightmappedMultitexture( void ) {
	shaderCommands_t *input;
	shader_t		*shader;

	input = &tess;
	shader = input->shader;

	//
	// log this call
	//
	if ( r_logFile->integer ) {
		// don't just call LogComment, or we will get
		// a call to va() every frame!
		GLimp_LogComment( va("--- RB_StageIteratorLightmappedMultitexture( %s ) ---\n", tess.shader->name) );
	}

	//
	// set face culling appropriately
	//
	GL_Cull( shader->cullType );

	//
	// set color, pointers, and lock
	//
	GL_State( GLS_DEFAULT );
	qglVertexPointer( 3, GL_FLOAT, 16, input->xyz );

#ifdef REPLACE_MODE
	qglDisableClientState( GL_COLOR_ARRAY );
	qglColor3f( 1, 1, 1 );
	qglShadeModel( GL_FLAT );
#else
	qglEnableClientState( GL_COLOR_ARRAY );
	qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.constantColor255 );
#endif

	//
	// select base stage
	//
	GL_SelectTexture( 0 );

	qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
	R_BindAnimatedImage( &tess.xstages[0]->bundle[0] );
	qglTexCoordPointer( 2, GL_FLOAT, 16, tess.texCoords[0][0] );

	//
	// configure second stage
	//
	GL_SelectTexture( 1 );
	qglEnable( GL_TEXTURE_2D );
	if ( r_lightmap->integer ) {
		GL_TexEnv( GL_REPLACE );
	} else {
		GL_TexEnv( GL_MODULATE );
	}
	R_BindAnimatedImage( &tess.xstages[0]->bundle[1] );
	qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
	qglTexCoordPointer( 2, GL_FLOAT, 16, tess.texCoords[0][1] );

	//
	// lock arrays
	//
	if ( qglLockArraysEXT ) {
		qglLockArraysEXT(0, input->numVertexes);
		GLimp_LogComment( "glLockArraysEXT\n" );
	}

	R_DrawElements( input->numIndexes, input->indexes );

	//
	// disable texturing on TEXTURE1, then select TEXTURE0
	//
	qglDisable( GL_TEXTURE_2D );
	qglDisableClientState( GL_TEXTURE_COORD_ARRAY );

	GL_SelectTexture( 0 );
#ifdef REPLACE_MODE
	GL_TexEnv( GL_MODULATE );
	qglShadeModel( GL_SMOOTH );
#endif

	// 
	// now do any dynamic lighting needed
	//
	if ( tess.dlightBits && tess.shader->sort <= SS_OPAQUE ) {
		ProjectDlightTexture();
	}

	//
	// now do fog
	//
	if ( tess.fogNum && tess.shader->fogPass ) {
		RB_FogPass();
	}

	//
	// unlock arrays
	//
	if ( qglUnlockArraysEXT ) {
		qglUnlockArraysEXT();
//.........这里部分代码省略.........

//.........这里部分代码省略.........
		qglActiveTexture(GL_TEXTURE0 + i);

		qglMatrixMode(GL_TEXTURE);
		qglLoadIdentity();

		qglDisable(GL_TEXTURE_2D);
		qglDisable(GL_TEXTURE_3D);
		qglDisable(GL_TEXTURE_CUBE_MAP);
		qglDisable(GL_TEXTURE_2D_ARRAY);

		qglBindTexture(GL_TEXTURE_2D, 0);
		qglBindTexture(GL_TEXTURE_3D, 0);
		qglBindTexture(GL_TEXTURE_CUBE_MAP, 0);
		qglBindTexture(GL_TEXTURE_2D_ARRAY, 0);

		qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

		qglDisable(GL_TEXTURE_GEN_S);
		qglDisable(GL_TEXTURE_GEN_T);
		qglDisable(GL_TEXTURE_GEN_R);
		qglDisable(GL_TEXTURE_GEN_Q);

		qglTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
		qglTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
		qglTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
		qglTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	}

	qglDisable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

	qglUseProgram(0);

	qglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
	qglBindBuffer(GL_ARRAY_BUFFER, 0);

	qglViewport(0, 0, glConfig.videoWidth, glConfig.videoHeight);

	qglEnable(GL_SCISSOR_TEST);
	qglScissor(0, 0, glConfig.videoWidth, glConfig.videoHeight);

	qglEnable(GL_DEPTH_BOUNDS_TEST_EXT);
	qglDepthBoundsEXT(0.0f, 1.0f);

	qglFrontFace(GL_CCW);

	qglShadeModel(GL_SMOOTH);

	qglPolygonMode(GL_FRONT_AND_BACK, GL_FILL);

	qglDisable(GL_CULL_FACE);
	qglCullFace(GL_FRONT);

	qglDisable(GL_POLYGON_OFFSET_FILL);
	qglDisable(GL_POLYGON_OFFSET_LINE);
	qglPolygonOffset(0.0f, 0.0f);

	qglDisable(GL_BLEND);
	qglBlendFunc(GL_ONE, GL_ZERO);
	qglBlendEquation(GL_FUNC_ADD);

	qglDisable(GL_ALPHA_TEST);
	qglAlphaFunc(GL_GREATER, 0.0f);

	qglDisable(GL_DEPTH_TEST);
	qglDepthFunc(GL_LEQUAL);

	qglDisable(GL_STENCIL_TEST);
	qglStencilFunc(GL_ALWAYS, 128, 255);
	qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);

	qglDepthRange(0.0f, 1.0f);

	qglColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
	qglDepthMask(GL_TRUE);
	qglStencilMask(255);

	qglDisable(GL_DEPTH_CLAMP);

	qglDisable(GL_CLIP_PLANE0);

	if (glConfig.multiSamples > 1){
		qglDisable(GL_MULTISAMPLE);

		qglDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
	}

	qglClearColor(0.0f, 0.0f, 0.0f, 1.0f);
	qglClearDepth(1.0f);
	qglClearStencil(128);

	qglEnableClientState(GL_VERTEX_ARRAY);

	qglDisableVertexAttribArray(GL_ATTRIB_NORMAL);
	qglDisableVertexAttribArray(GL_ATTRIB_TANGENT1);
	qglDisableVertexAttribArray(GL_ATTRIB_TANGENT2);
	qglDisableVertexAttribArray(GL_ATTRIB_TEXCOORD);
	qglDisableVertexAttribArray(GL_ATTRIB_COLOR);

	QGL_LogPrintf("--------------------\n");
}

//.........这里部分代码省略.........
	
	//if (m_Camera.draw_mode == cd_light)
	//{
//	if (g_PrefsDlg.m_bGLLighting)
//	{
//		VectorCopy(m_Camera.origin, lightPos);
//		lightPos[3] = 1;
//		qglLightfv(GL_LIGHT0, GL_POSITION, lightPos);
//	}
	//}
	
	InitCull ();
	
	//
	// draw stuff
	//
	GLfloat lAmbient[] = {1.0, 1.0, 1.0, 1.0};
	
	switch (m_Camera.draw_mode)
	{
	case cd_wire:
		qglPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
		qglDisable(GL_TEXTURE_2D);
		qglDisable(GL_TEXTURE_1D);
		qglDisable(GL_BLEND);
		qglDisable(GL_DEPTH_TEST);
		qglColor3f(1.0, 1.0, 1.0);
		//		qglEnable (GL_LINE_SMOOTH);
		break;
		
	case cd_solid:
		qglCullFace(GL_FRONT);
		qglEnable(GL_CULL_FACE);
		qglShadeModel (GL_FLAT);
		qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
		qglDisable(GL_TEXTURE_2D);
		qglDisable(GL_BLEND);
		qglEnable(GL_DEPTH_TEST);
		qglDepthFunc (GL_LEQUAL);
		break;
		
	case cd_texture:
		qglCullFace(GL_FRONT);
		qglEnable(GL_CULL_FACE);
		qglShadeModel (GL_FLAT);
		qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
		qglEnable(GL_TEXTURE_2D);
		qglTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
		qglDisable(GL_BLEND);
		qglEnable(GL_DEPTH_TEST);
		qglDepthFunc (GL_LEQUAL);
		break;
		
	case cd_blend:
		qglCullFace(GL_FRONT);
		qglEnable(GL_CULL_FACE);
		qglShadeModel (GL_FLAT);
		qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
		qglEnable(GL_TEXTURE_2D);
		qglTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
		qglDisable(GL_DEPTH_TEST);
		qglEnable (GL_BLEND);

/*
==============
Z_Draw
==============
*/
void Z_Draw (void)
{
    brush_t	*brush;
	float	w, h;
	double	start, end;
	qtexture_t	*q;
	float	top, bottom;
	vec3_t	org_top, org_bottom, dir_up, dir_down;
	int xCam = z.width/3;

	if (!active_brushes.next)
		return;	// not valid yet

	if (z.timing)
		start = Sys_DoubleTime ();

	//
	// clear
	//
	qglViewport(0, 0, z.width, z.height);

	qglClearColor (
		g_qeglobals.d_savedinfo.colors[COLOR_GRIDBACK][0],
		g_qeglobals.d_savedinfo.colors[COLOR_GRIDBACK][1],
		g_qeglobals.d_savedinfo.colors[COLOR_GRIDBACK][2],
		0);

    /* GL Bug */ 
	/* When not using hw acceleration, gl will fault if we clear the depth 
	buffer bit on the first pass. The hack fix is to set the GL_DEPTH_BUFFER_BIT
	only after Z_Draw() has been called once. Yeah, right. */
	qglClear(glbitClear); 
	glbitClear |= GL_DEPTH_BUFFER_BIT;

	qglMatrixMode(GL_PROJECTION);

  qglLoadIdentity ();
	w = z.width/2 / z.scale;
	h = z.height/2 / z.scale;
	qglOrtho (-w, w, z.origin[2]-h, z.origin[2]+h, -8, 8);

	qglDisable(GL_TEXTURE_2D);
	qglDisable(GL_TEXTURE_1D);
	qglDisable(GL_DEPTH_TEST);
	qglDisable(GL_BLEND);


	//
	// now draw the grid
	//
	Z_DrawGrid ();

	//
	// draw stuff
	//

	qglDisable(GL_CULL_FACE);

	qglShadeModel (GL_FLAT);

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);

	qglDisable(GL_TEXTURE_2D);
	qglDisable(GL_BLEND);
	qglDisable(GL_DEPTH_TEST);


	// draw filled interiors and edges
	dir_up[0] = 0 ; dir_up[1] = 0; dir_up[2] = 1;
	dir_down[0] = 0 ; dir_down[1] = 0; dir_down[2] = -1;
	VectorCopy (z.origin, org_top);
	org_top[2] = MAX_WORLD_COORD;//4096;	// MAX_WORLD_COORD  ?  (John said this didn't work, Hmmmmmm)	// !suspect!
	VectorCopy (z.origin, org_bottom);
	org_bottom[2] = MIN_WORLD_COORD;//-4096;	// MIN_WORLD_COORD?    " "  !suspect!

	for (brush = active_brushes.next ; brush != &active_brushes ; brush=brush->next)
	{
		if (brush->mins[0] >= z.origin[0]
			|| brush->maxs[0] <= z.origin[0]
			|| brush->mins[1] >= z.origin[1]
			|| brush->maxs[1] <= z.origin[1])
			continue;

		if (!Brush_Ray (org_top, dir_down, brush, &top))
			continue;
		top = org_top[2] - top;
		if (!Brush_Ray (org_bottom, dir_up, brush, &bottom))
			continue;
		bottom = org_bottom[2] + bottom;

		q = Texture_ForName (brush->brush_faces->texdef.name);
		qglColor3f (q->color[0], q->color[1], q->color[2]);
		qglBegin (GL_QUADS);
		qglVertex2f (-xCam, bottom);
		qglVertex2f (xCam, bottom);
//.........这里部分代码省略.........

void RB_StageIteratorLightmappedMultitexture( void ) {
	shaderCommands_t *input;

	input = &tess;

	//
	// log this call
	//
	if ( r_logFile->integer ) {
		// don't just call LogComment, or we will get
		// a call to va() every frame!
		GLimp_LogComment( va( "--- RB_StageIteratorLightmappedMultitexture( %s ) ---\n", tess.shader->name ) );
	}

	// set GL fog
	SetIteratorFog();

	//
	// set face culling appropriately
	//
	GL_Cull( input->shader->cullType );

	//
	// set color, pointers, and lock
	//
	GL_State( GLS_DEFAULT );
	qglVertexPointer( 3, GL_FLOAT, 16, input->xyz );

#ifdef REPLACE_MODE
	qglDisableClientState( GL_COLOR_ARRAY );
	qglColor3f( 1, 1, 1 );
	qglShadeModel( GL_FLAT );
#else
	qglEnableClientState( GL_COLOR_ARRAY );
	qglColorPointer( 4, GL_UNSIGNED_BYTE, 0, tess.constantColor255 );
#endif

	//
	// select base stage
	//
	GL_SelectTexture( 0 );

	qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
	R_BindAnimatedImage( &tess.xstages[0]->bundle[0] );
	qglTexCoordPointer( 2, GL_FLOAT, 8, tess.texCoords0 );

	//
	// configure second stage
	//
	GL_SelectTexture( 1 );
	qglEnable( GL_TEXTURE_2D );
	if ( r_lightmap->integer ) {
		GL_TexEnv( GL_REPLACE );
	} else {
		GL_TexEnv( GL_MODULATE );
	}

//----(SA)	modified for snooper
	if ( tess.xstages[0]->bundle[1].isLightmap && ( backEnd.refdef.rdflags & RDF_SNOOPERVIEW ) ) {
		GL_Bind( tr.whiteImage );
	} else {
		R_BindAnimatedImage( &tess.xstages[0]->bundle[1] );
	}

	qglEnableClientState( GL_TEXTURE_COORD_ARRAY );
	qglTexCoordPointer( 2, GL_FLOAT, 8, tess.texCoords1 );

	//
	// lock arrays
	//
	if ( qglLockArraysEXT ) {
		qglLockArraysEXT( 0, input->numVertexes );
		GLimp_LogComment( "glLockArraysEXT\n" );
	}

	R_DrawElements( input->numIndexes, input->indexes );

	//
	// disable texturing on TEXTURE1, then select TEXTURE0
	//
	qglDisable( GL_TEXTURE_2D );
	qglDisableClientState( GL_TEXTURE_COORD_ARRAY );

	GL_SelectTexture( 0 );
#ifdef REPLACE_MODE
	GL_TexEnv( GL_MODULATE );
	qglShadeModel( GL_SMOOTH );
#endif

	//
	// now do any dynamic lighting needed
	//
	//%	if ( tess.dlightBits && tess.shader->sort <= SS_OPAQUE )
	if ( tess.dlightBits && tess.shader->fogPass &&
		 !( tess.shader->surfaceFlags & ( SURF_NODLIGHT | SURF_SKY ) ) ) {
		if ( r_dynamiclight->integer == 2 ) {
			DynamicLightPass();
		} else {
			DynamicLightSinglePass();
		}
//.........这里部分代码省略.........