Imported existing code

indra/newview/llsky.cpp

@@ -0,0 +1,485 @@
+/** 
+ * @file llsky.cpp
+ * @brief IndraWorld sky class 
+ *
+ * $LicenseInfo:firstyear=2000&license=viewergpl$
+ * 
+ * Copyright (c) 2000-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+//	Ideas:
+//		-haze should be controlled by global query from sims
+//		-need secondary optical effects on sun (flare)
+//		-stars should be brought down from sims
+//		-star intensity should be driven by global ambient level from sims,
+//		 so that eclipses, etc can be easily done.
+//
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llsky.h"
+
+// linden library includes
+#include "llerror.h"
+#include "llmath.h"
+#include "math.h"
+#include "v4color.h"
+
+#include "llviewerobjectlist.h"
+#include "llviewerobject.h"
+#include "llviewercamera.h"
+#include "pipeline.h"
+#include "llagent.h"
+#include "lldrawpool.h"
+
+#include "llvosky.h"
+#include "llcubemap.h"
+#include "llviewercontrol.h"
+
+#include "llvowlsky.h"
+
+F32 azimuth_from_vector(const LLVector3 &v);
+F32 elevation_from_vector(const LLVector3 &v);
+
+LLSky				gSky;
+// ---------------- LLSky ----------------
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+LLSky::LLSky()
+{
+	// Set initial clear color to black
+	// Set fog color 
+	mFogColor.mV[VRED] = mFogColor.mV[VGREEN] = mFogColor.mV[VBLUE] = 0.5f;
+	mFogColor.mV[VALPHA] = 0.0f;
+
+	mLightingGeneration = 0;
+	mUpdatedThisFrame = TRUE;
+	mOverrideSimSunPosition = FALSE;
+	mSunPhase = 0.f;
+}
+
+
+LLSky::~LLSky()
+{
+}
+
+void LLSky::cleanup()
+{
+	mVOSkyp = NULL;
+	mVOWLSkyp = NULL;
+	mVOGroundp = NULL;
+}
+
+void LLSky::destroyGL()
+{
+	if (!mVOSkyp.isNull() && mVOSkyp->getCubeMap())
+	{
+		mVOSkyp->cleanupGL();
+	}
+	if (mVOWLSkyp.notNull())
+	{
+		mVOWLSkyp->cleanupGL();
+	}
+}
+
+void LLSky::restoreGL()
+{
+	if (mVOSkyp)
+	{
+		mVOSkyp->restoreGL();
+	}
+	if (mVOWLSkyp)
+	{
+		mVOWLSkyp->restoreGL();
+	}
+}
+
+void LLSky::resetVertexBuffers()
+{
+	if (gSky.mVOSkyp.notNull())
+	{
+		gPipeline.resetVertexBuffers(gSky.mVOSkyp->mDrawable);
+		gPipeline.resetVertexBuffers(gSky.mVOGroundp->mDrawable);
+		gPipeline.markRebuild(gSky.mVOSkyp->mDrawable, LLDrawable::REBUILD_ALL, TRUE);
+		gPipeline.markRebuild(gSky.mVOGroundp->mDrawable, LLDrawable::REBUILD_ALL, TRUE);
+	}
+	if (gSky.mVOWLSkyp.notNull())
+	{
+		gSky.mVOWLSkyp->resetVertexBuffers();
+		gPipeline.resetVertexBuffers(gSky.mVOWLSkyp->mDrawable);
+		gPipeline.markRebuild(gSky.mVOWLSkyp->mDrawable, LLDrawable::REBUILD_ALL, TRUE);
+	}
+}
+
+void LLSky::setOverrideSun(BOOL override)
+{
+	if (!mOverrideSimSunPosition && override)
+	{
+		mLastSunDirection = getSunDirection();
+	}
+	else if (mOverrideSimSunPosition && !override)
+	{
+		setSunDirection(mLastSunDirection, LLVector3::zero);
+	}
+	mOverrideSimSunPosition = override;
+}
+
+void LLSky::setSunDirection(const LLVector3 &sun_direction, const LLVector3 &sun_ang_velocity)
+{
+	if(mVOSkyp.notNull()) {
+		mVOSkyp->setSunDirection(sun_direction, sun_ang_velocity);
+	}
+}
+
+
+void LLSky::setSunTargetDirection(const LLVector3 &sun_direction, const LLVector3 &sun_ang_velocity)
+{
+	mSunTargDir = sun_direction;
+}
+
+
+LLVector3 LLSky::getSunDirection() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getToSun();
+	}
+	else
+	{
+		return LLVector3::z_axis;
+	}
+}
+
+
+LLVector3 LLSky::getMoonDirection() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getToMoon();
+	}
+	else
+	{
+		return LLVector3::z_axis;
+	}
+}
+
+
+LLColor4 LLSky::getSunDiffuseColor() const
+{
+	if (mVOSkyp)
+	{
+		return LLColor4(mVOSkyp->getSunDiffuseColor());
+	}
+	else
+	{
+		return LLColor4(1.f, 1.f, 1.f, 1.f);
+	}
+}
+
+LLColor4 LLSky::getSunAmbientColor() const
+{
+	if (mVOSkyp)
+	{
+		return LLColor4(mVOSkyp->getSunAmbientColor());
+	}
+	else
+	{
+		return LLColor4(0.f, 0.f, 0.f, 1.f);
+	}
+}
+
+
+LLColor4 LLSky::getMoonDiffuseColor() const
+{
+	if (mVOSkyp)
+	{
+		return LLColor4(mVOSkyp->getMoonDiffuseColor());
+	}
+	else
+	{
+		return LLColor4(1.f, 1.f, 1.f, 1.f);
+	}
+}
+
+LLColor4 LLSky::getMoonAmbientColor() const
+{
+	if (mVOSkyp)
+	{
+		return LLColor4(mVOSkyp->getMoonAmbientColor());
+	}
+	else
+	{
+		return LLColor4(0.f, 0.f, 0.f, 0.f);
+	}
+}
+
+
+LLColor4 LLSky::getTotalAmbientColor() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getTotalAmbientColor();
+	}
+	else
+	{
+		return LLColor4(1.f, 1.f, 1.f, 1.f);
+	}
+}
+
+
+BOOL LLSky::sunUp() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->isSunUp();
+	}
+	else
+	{
+		return TRUE;
+	}
+}
+
+
+LLColor4U LLSky::getFadeColor() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getFadeColor();
+	}
+	else
+	{
+		return LLColor4(1.f, 1.f, 1.f, 1.f);
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////
+// Public Methods
+//////////////////////////////////////////////////////////////////////
+
+void LLSky::init(const LLVector3 &sun_direction)
+{
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	mVOWLSkyp = static_cast<LLVOWLSky*>(gObjectList.createObjectViewer(LLViewerObject::LL_VO_WL_SKY, NULL));
+	mVOWLSkyp->initSunDirection(sun_direction, LLVector3::zero);
+	gPipeline.createObject(mVOWLSkyp.get());
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	mVOSkyp = (LLVOSky *)gObjectList.createObjectViewer(LLViewerObject::LL_VO_SKY, NULL);
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	mVOSkyp->initSunDirection(sun_direction, LLVector3());
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	gPipeline.createObject((LLViewerObject *)mVOSkyp);
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	mVOGroundp = (LLVOGround*)gObjectList.createObjectViewer(LLViewerObject::LL_VO_GROUND, NULL);
+	LLVOGround *groundp = mVOGroundp;
+	gPipeline.createObject((LLViewerObject *)groundp);
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	gSky.setFogRatio(gSavedSettings.getF32("RenderFogRatio"));	
+
+	////////////////////////////
+	//
+	// Legacy code, ignore
+	//
+	//
+
+	// Get the parameters.
+	mSunDefaultPosition = gSavedSettings.getVector3("SkySunDefaultPosition");
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	if (gSavedSettings.getBOOL("SkyOverrideSimSunPosition") || mOverrideSimSunPosition)
+	{
+		setSunDirection(mSunDefaultPosition, LLVector3(0.f, 0.f, 0.f));
+	}
+	else
+	{
+		setSunDirection(sun_direction, LLVector3(0.f, 0.f, 0.f));
+	}
+
+	LLGLState::checkStates();
+	LLGLState::checkTextureChannels();
+
+	mUpdatedThisFrame = TRUE;
+}
+
+
+void LLSky::setCloudDensityAtAgent(F32 cloud_density)
+{
+	if (mVOSkyp)
+	{
+		mVOSkyp->setCloudDensity(cloud_density);
+	}
+}
+
+
+void LLSky::setWind(const LLVector3& average_wind)
+{
+	if (mVOSkyp)
+	{
+		mVOSkyp->setWind(average_wind);
+	}
+}
+
+
+void LLSky::propagateHeavenlyBodies(F32 dt)
+{
+	if (!mOverrideSimSunPosition)
+	{
+		LLVector3 curr_dir = getSunDirection();
+		LLVector3 diff = mSunTargDir - curr_dir;
+		const F32 dist = diff.normVec();
+		if (dist > 0)
+		{
+			const F32 step = llmin (dist, 0.00005f);
+			//const F32 step = min (dist, 0.0001);
+			diff *= step;
+			curr_dir += diff;
+			curr_dir.normVec();
+			if (mVOSkyp)
+			{
+				mVOSkyp->setSunDirection(curr_dir, LLVector3());
+			}
+		}
+	}
+}
+
+F32 LLSky::getSunPhase() const
+{
+	return mSunPhase;
+}
+
+void LLSky::setSunPhase(const F32 phase)
+{
+	mSunPhase = phase;
+}
+
+//////////////////////////////////////////////////////////////////////
+// Private Methods
+//////////////////////////////////////////////////////////////////////
+
+
+LLColor4 LLSky::getFogColor() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getFogColor();
+	}
+
+	return LLColor4(1.f, 1.f, 1.f, 1.f);
+}
+
+void LLSky::updateFog(const F32 distance)
+{
+	if (mVOSkyp)
+	{
+		mVOSkyp->updateFog(distance);
+	}
+}
+
+void LLSky::updateCull()
+{
+	// *TODO: do culling for wl sky properly -Brad
+}
+
+void LLSky::updateSky()
+{
+	if (!gPipeline.hasRenderType(LLPipeline::RENDER_TYPE_SKY))
+	{
+		return;
+	}
+	if (mVOSkyp)
+	{
+		mVOSkyp->updateSky();
+	}
+}
+
+
+void LLSky::setFogRatio(const F32 fog_ratio)
+{
+	if (mVOSkyp)
+	{
+		mVOSkyp->setFogRatio(fog_ratio);
+	}
+}
+
+
+F32 LLSky::getFogRatio() const
+{
+	if (mVOSkyp)
+	{
+		return mVOSkyp->getFogRatio();
+	}
+	else
+	{
+		return 0.f;
+	}
+}
+
+
+// Returns angle (DEGREES) between the horizontal plane and "v", 
+// where the angle is negative when v.mV[VZ] < 0.0f
+F32 elevation_from_vector(const LLVector3 &v)
+{
+	F32 elevation = 0.0f;
+	F32 xy_component = (F32) sqrt(v.mV[VX] * v.mV[VX] + v.mV[VY] * v.mV[VY]);
+	if (xy_component != 0.0f)
+	{
+		elevation = RAD_TO_DEG * (F32) atan(v.mV[VZ]/xy_component);
+	}
+	else
+	{
+		if (v.mV[VZ] > 0.f)
+		{
+			elevation = 90.f;
+		}
+		else
+		{
+			elevation = -90.f;
+		}
+	}
+	return elevation;
+}