1 files changed, 41 insertions, 18 deletions

diff --git a/indra/newview/llvosky.cpp b/indra/newview/llvosky.cpp
index 66ba6249d3..e9db37821b 100644
--- a/indra/newview/llvosky.cpp
+++ b/indra/newview/llvosky.cpp
@@ -755,6 +755,11 @@ void LLVOSky::calcSkyColorWLVert(LLVector3 & Pn, LLColor3 & vary_HazeColor, LLCo
 	// project the direction ray onto the sky dome.
 	F32 phi = acos(Pn[1]);
 	F32 sinA = sin(F_PI - phi);
+	if (fabsf(sinA) < 0.01f)
+	{ //avoid division by zero
+		sinA = 0.01f;
+	}
+
 	F32 Plen = dome_radius * sin(F_PI + phi + asin(dome_offset_ratio * sinA)) / sinA;
 
 	Pn *= Plen;
@@ -1262,7 +1267,7 @@ void LLVOSky::updateDummyVertexBuffer()
 	LLStrider<LLVector3> vertices ;
 	mFace[FACE_DUMMY]->getVertexBuffer()->getVertexStrider(vertices,  0);
 	*vertices = mCameraPosAgent ;
-	mFace[FACE_DUMMY]->getVertexBuffer()->setBuffer(0) ;
+	mFace[FACE_DUMMY]->getVertexBuffer()->flush();
 }
 //----------------------------------
 //end of fake vertex buffer updating
@@ -1346,7 +1351,7 @@ BOOL LLVOSky::updateGeometry(LLDrawable *drawable)
 			*indicesp++ = index_offset + 3;
 			*indicesp++ = index_offset + 2;
 
-			buff->setBuffer(0);
+			buff->flush();
 		}
 	}
 
@@ -1511,7 +1516,7 @@ BOOL LLVOSky::updateHeavenlyBodyGeometry(LLDrawable *drawable, const S32 f, cons
 	*indicesp++ = index_offset + 2;
 	*indicesp++ = index_offset + 3;
 
-	facep->getVertexBuffer()->setBuffer(0);
+	facep->getVertexBuffer()->flush();
 
 	if (is_sun)
 	{
@@ -2025,7 +2030,7 @@ void LLVOSky::updateReflectionGeometry(LLDrawable *drawable, F32 H,
 		}
 	}
 
-	face->getVertexBuffer()->setBuffer(0);
+	face->getVertexBuffer()->flush();
 }
 
 
@@ -2035,9 +2040,12 @@ void LLVOSky::updateFog(const F32 distance)
 {
 	if (!gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_FOG))
 	{
-		glFogf(GL_FOG_DENSITY, 0);
-		glFogfv(GL_FOG_COLOR, (F32 *) &LLColor4::white.mV);
-		glFogf(GL_FOG_END, 1000000.f);
+		if (!LLGLSLShader::sNoFixedFunction)
+		{
+			glFogf(GL_FOG_DENSITY, 0);
+			glFogfv(GL_FOG_COLOR, (F32 *) &LLColor4::white.mV);
+			glFogf(GL_FOG_END, 1000000.f);
+		}
 		return;
 	}
 
@@ -2107,7 +2115,10 @@ void LLVOSky::updateFog(const F32 distance)
 	if (camera_height > water_height)
 	{
 		LLColor4 fog(render_fog_color);
-		glFogfv(GL_FOG_COLOR, fog.mV);
+		if (!LLGLSLShader::sNoFixedFunction)
+		{
+			glFogfv(GL_FOG_COLOR, fog.mV);
+		}
 		mGLFogCol = fog;
 
 		if (hide_clip_plane)
@@ -2115,13 +2126,19 @@ void LLVOSky::updateFog(const F32 distance)
 			// For now, set the density to extend to the cull distance.
 			const F32 f_log = 2.14596602628934723963618357029f; // sqrt(fabs(log(0.01f)))
 			fog_density = f_log/fog_distance;
-			glFogi(GL_FOG_MODE, GL_EXP2);
+			if (!LLGLSLShader::sNoFixedFunction)
+			{
+				glFogi(GL_FOG_MODE, GL_EXP2);
+			}
 		}
 		else
 		{
 			const F32 f_log = 4.6051701859880913680359829093687f; // fabs(log(0.01f))
 			fog_density = (f_log)/fog_distance;
-			glFogi(GL_FOG_MODE, GL_EXP);
+			if (!LLGLSLShader::sNoFixedFunction)
+			{
+				glFogi(GL_FOG_MODE, GL_EXP);
+			}
 		}
 	}
 	else
@@ -2141,23 +2158,29 @@ void LLVOSky::updateFog(const F32 distance)
 		fogCol.setAlpha(1);
 
 		// set the gl fog color
-		glFogfv(GL_FOG_COLOR, (F32 *) &fogCol.mV);
 		mGLFogCol = fogCol;
 
 		// set the density based on what the shaders use
 		fog_density = water_fog_density * gSavedSettings.getF32("WaterGLFogDensityScale");
-		glFogi(GL_FOG_MODE, GL_EXP2);
+
+		if (!LLGLSLShader::sNoFixedFunction)
+		{
+			glFogfv(GL_FOG_COLOR, (F32 *) &fogCol.mV);
+			glFogi(GL_FOG_MODE, GL_EXP2);
+		}
 	}
 
 	mFogColor = sky_fog_color;
 	mFogColor.setAlpha(1);
-	LLGLSFog gls_fog;
+	LLDrawPoolWater::sWaterFogEnd = fog_distance*2.2f;
 
-	glFogf(GL_FOG_END, fog_distance*2.2f);
-
-	glFogf(GL_FOG_DENSITY, fog_density);
-
-	glHint(GL_FOG_HINT, GL_NICEST);
+	if (!LLGLSLShader::sNoFixedFunction)
+	{
+		LLGLSFog gls_fog;
+		glFogf(GL_FOG_END, fog_distance*2.2f);
+		glFogf(GL_FOG_DENSITY, fog_density);
+		glHint(GL_FOG_HINT, GL_NICEST);
+	}
 	stop_glerror();
 }