void BeginShadow(){    glTexGenfv(GL_S, GL_EYE_PLANE, row0);     glTexGenfv(GL_T, GL_EYE_PLANE, row1);       glTexGenfv(GL_R, GL_EYE_PLANE, row2);       glTexGenfv(GL_Q, GL_EYE_PLANE, row3);    glEnable(GL_ALPHA_TEST);    glEnable(GL_TEXTURE_2D);    glEnable(GL_TEXTURE_GEN_S);    glEnable(GL_TEXTURE_GEN_T);    glEnable(GL_TEXTURE_GEN_R);    glEnable(GL_TEXTURE_GEN_Q);}......// first pass (shadows)glColor4f(1, 1, 1, 0);     //!!!!!!!!!!!!!!!glColorMask(1, 1, 1, 1);float clr[] = {0.3,0.3,0.3,1}; float clr2[] = {1,1,1,1};glActiveTextureARB(GL_TEXTURE1_ARB);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_GREATER);glPushAttrib(GL_ENABLE_BIT);BeginShadow();glLightfv(GL_LIGHT0, GL_DIFFUSE, clr);RenderScene();// second passglActiveTextureARB(GL_TEXTURE1_ARB);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL );glLightfv(GL_LIGHT0, GL_DIFFUSE, clr2);RenderScene();...glPopAttrib();

		//SHADOW PASS 1		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);		glLoadIdentity();		glViewport(0, 0, (int)SHADOW_WIDTH, (int)SHADOW_HEIGHT);		glMatrixMode(GL_PROJECTION);		float ambient0[] = { 1.6, 1.6, 1.6, 1 };			float clr[] = {0.3,0.3,0.3,1}; 		glEnable(GL_LIGHTING);       	glLightfv( GL_LIGHT0, GL_AMBIENT,  ambient0 );				glLightfv(GL_LIGHT0, GL_DIFFUSE, clr);		glColor4f(1, 1, 1, 0);     //!!!!!!!!!!!!!!!		glColorMask(1, 1, 1, 1);		glPushMatrix();			glLoadMatrixf(g_mProjection);			glMatrixMode(GL_MODELVIEW);			glLoadMatrixf(g_mModelView); 			glPolygonOffset( 1.5f,0.0f); 			glEnable(GL_POLYGON_OFFSET_FILL);			RenderHeightMap_notex(g_HeightMap);			glEnable(GL_TEXTURE_2D);	//		glEnable(GL_ALPHA_TEST);	//		glAlphaFunc(GL_GREATER,0.05);  			RENDER_gameobjects(0);			glDisable(GL_TEXTURE_2D);			glDisable(GL_ALPHA_TEST);	 		glActiveTextureARB(GL_TEXTURE0_ARB);			glBindTexture(GL_TEXTURE_2D, shadowtexture[SHADOW_ID]);			glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, (int)SHADOW_WIDTH, (int)SHADOW_HEIGHT);			glDisable(GL_POLYGON_OFFSET_FILL);			glViewport(0, 0, (int)GAME_X, (int)GAME_Y);		 			glMatrixMode(GL_PROJECTION);		glPopMatrix();