From 41daf99e1902adbf3f9a737559ab08f62c049992 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Tue, 12 Jan 2010 12:01:18 -0600
Subject: DEV-44675 Fix for sky wierdness on ATI 9.12 drivers.

---
 indra/newview/llvowlsky.cpp | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

(limited to 'indra/newview/llvowlsky.cpp')

diff --git a/indra/newview/llvowlsky.cpp b/indra/newview/llvowlsky.cpp
index d3238f16a8..0272a2ab34 100644
--- a/indra/newview/llvowlsky.cpp
+++ b/indra/newview/llvowlsky.cpp
@@ -491,7 +491,7 @@ void LLVOWLSky::drawStars(void)
 	if (mStarsVerts.notNull())
 	{
 		mStarsVerts->setBuffer(LLDrawPoolWLSky::STAR_VERTEX_DATA_MASK);
-		mStarsVerts->draw(LLRender::POINTS, getStarsNumIndices(), 0);
+		mStarsVerts->drawArrays(LLRender::QUADS, 0, getStarsNumVerts()*4);
 	}
 }
 
@@ -546,6 +546,7 @@ void LLVOWLSky::initStars()
 	std::vector<F32>::iterator v_i = mStarIntensities.begin();
 
 	U32 i;
+
 	for (i = 0; i < getStarsNumVerts(); ++i)
 	{
 		v_p->mV[VX] = ll_frand() - 0.5f;
@@ -771,17 +772,17 @@ BOOL LLVOWLSky::updateStarGeometry(LLDrawable *drawable)
 {
 	LLStrider<LLVector3> verticesp;
 	LLStrider<LLColor4U> colorsp;
-	LLStrider<U16> indicesp;
+	LLStrider<LLVector2> texcoordsp;
 
 	if (mStarsVerts.isNull())
 	{
 		mStarsVerts = new LLVertexBuffer(LLDrawPoolWLSky::STAR_VERTEX_DATA_MASK, GL_DYNAMIC_DRAW);
-		mStarsVerts->allocateBuffer(getStarsNumVerts(), getStarsNumIndices(), TRUE);
+		mStarsVerts->allocateBuffer(getStarsNumVerts()*4, 0, TRUE);
 	}
-
+ 
 	BOOL success = mStarsVerts->getVertexStrider(verticesp)
-		&& mStarsVerts->getIndexStrider(indicesp)
-		&& mStarsVerts->getColorStrider(colorsp);
+		&& mStarsVerts->getColorStrider(colorsp)
+		&& mStarsVerts->getTexCoord0Strider(texcoordsp);
 
 	if(!success)
 	{
@@ -791,11 +792,37 @@ BOOL LLVOWLSky::updateStarGeometry(LLDrawable *drawable)
 	// *TODO: fix LLStrider with a real prefix increment operator so it can be
 	// used as a model of OutputIterator. -Brad
 	// std::copy(mStarVertices.begin(), mStarVertices.end(), verticesp);
+
+	if (mStarVertices.size() < getStarsNumVerts())
+	{
+		llerrs << "Star reference geometry insufficient." << llendl;
+	}
+
 	for (U32 vtx = 0; vtx < getStarsNumVerts(); ++vtx)
 	{
+		LLVector3 at = mStarVertices[vtx];
+		at.normVec();
+		LLVector3 left = at%LLVector3(0,0,1);
+		LLVector3 up = at%left;
+
+		F32 sc = 0.5f+ll_frand()*1.25f;
+		left *= sc;
+		up *= sc;
+
 		*(verticesp++)  = mStarVertices[vtx];
+		*(verticesp++) = mStarVertices[vtx]+left;
+		*(verticesp++) = mStarVertices[vtx]+left+up;
+		*(verticesp++) = mStarVertices[vtx]+up;
+
+		*(texcoordsp++) = LLVector2(0,0);
+		*(texcoordsp++) = LLVector2(0,1);
+		*(texcoordsp++) = LLVector2(1,1);
+		*(texcoordsp++) = LLVector2(1,0);
+
+		*(colorsp++)    = LLColor4U(mStarColors[vtx]);
+		*(colorsp++)    = LLColor4U(mStarColors[vtx]);
+		*(colorsp++)    = LLColor4U(mStarColors[vtx]);
 		*(colorsp++)    = LLColor4U(mStarColors[vtx]);
-		*(indicesp++)   = vtx;
 	}
 
 	mStarsVerts->setBuffer(0);
-- 
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