C++ LLVOSky类代码示例

void LLDrawPoolWater::renderReflection(LLFace* face)
{
	LLVOSky *voskyp = gSky.mVOSkyp;

	if (!voskyp)
	{
		return;
	}

	if (!face->getGeomCount())
	{
		return;
	}
	
	S8 dr = voskyp->getDrawRefl();
	if (dr < 0)
	{
		return;
	}

	LLGLSNoFog noFog;

	gGL.getTexUnit(0)->bind(mHBTex[dr]);

	LLOverrideFaceColor override(this, face->getFaceColor().mV);
	face->renderIndexed();
}

void LLDrawPoolWater::shade()
{
	if (!deferred_render)
	{
		gGL.setColorMask(true, true);
	}

	LLVOSky *voskyp = gSky.mVOSkyp;

	if(voskyp == NULL) 
	{
		return;
	}

	LLGLDisable blend(GL_BLEND);

	LLColor3 light_diffuse(0,0,0);
	F32 light_exp = 0.0f;
	LLVector3 light_dir;
	LLColor3 light_color;

	if (gSky.getSunDirection().mV[2] > LLSky::NIGHTTIME_ELEVATION_COS) 	 
    { 	 
        light_dir  = gSky.getSunDirection(); 	 
        light_dir.normVec(); 	
		light_color = gSky.getSunDiffuseColor();
		if(gSky.mVOSkyp) {
	        light_diffuse = gSky.mVOSkyp->getSun().getColorCached(); 	 
			light_diffuse.normVec(); 	 
		}
        light_exp = light_dir * LLVector3(light_dir.mV[0], light_dir.mV[1], 0); 	 
        light_diffuse *= light_exp + 0.25f; 	 
    } 	 
    else  	 
    { 	 
        light_dir       = gSky.getMoonDirection(); 	 
        light_dir.normVec(); 	 
		light_color = gSky.getMoonDiffuseColor();
        light_diffuse   = gSky.mVOSkyp->getMoon().getColorCached(); 	 
        light_diffuse.normVec(); 	 
        light_diffuse *= 0.5f; 	 
        light_exp = light_dir * LLVector3(light_dir.mV[0], light_dir.mV[1], 0); 	 
    }

	light_exp *= light_exp;
	light_exp *= light_exp;
	light_exp *= light_exp;
	light_exp *= light_exp;
	light_exp *= 256.f;
	light_exp = light_exp > 32.f ? light_exp : 32.f;

	LLGLSLShader* shader;

	F32 eyedepth = LLViewerCamera::getInstance()->getOrigin().mV[2] - gAgent.getRegion()->getWaterHeight();
	
	if (deferred_render)
	{
		shader = &gDeferredWaterProgram;
	}
	else if (eyedepth < 0.f && LLPipeline::sWaterReflections)
	{
		shader = &gUnderWaterProgram;
	}
	else
	{
		shader = &gWaterProgram;
	}

	if (deferred_render)
	{
		gPipeline.bindDeferredShader(*shader);
	}
	else
	{
		shader->bind();
	}

	sTime = (F32)LLFrameTimer::getElapsedSeconds()*0.5f;
	
	S32 reftex = shader->enableTexture(LLViewerShaderMgr::WATER_REFTEX);
		
	if (reftex > -1)
	{
		gGL.getTexUnit(reftex)->activate();
		gGL.getTexUnit(reftex)->bind(&gPipeline.mWaterRef);
		gGL.getTexUnit(0)->activate();
	}	

	//bind normal map
	S32 bumpTex = shader->enableTexture(LLViewerShaderMgr::BUMP_MAP);

	LLWaterParamManager * param_mgr = LLWaterParamManager::instance();

	// change mWaterNormp if needed
	if (mWaterNormp->getID() != param_mgr->getNormalMapID())
	{
		mWaterNormp = LLViewerTextureManager::getFetchedTexture(param_mgr->getNormalMapID());
	}

	mWaterNormp->addTextureStats(1024.f*1024.f);
//.........这里部分代码省略.........

// for low end hardware
void LLDrawPoolWater::renderOpaqueLegacyWater()
{
    LLVOSky *voskyp = gSky.mVOSkyp;

    stop_glerror();

    // Depth sorting and write to depth buffer
    // since this is opaque, we should see nothing
    // behind the water.  No blending because
    // of no transparency.  And no face culling so
    // that the underside of the water is also opaque.
    LLGLDepthTest gls_depth(GL_TRUE, GL_TRUE);
    LLGLDisable no_cull(GL_CULL_FACE);
    LLGLDisable no_blend(GL_BLEND);

    gPipeline.disableLights();

    mOpaqueWaterImagep->addTextureStats(1024.f*1024.f);

    // Activate the texture binding and bind one
    // texture since all images will have the same texture
    gGL.getTexUnit(0)->activate();
    gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
    gGL.getTexUnit(0)->bind(mOpaqueWaterImagep);

    // Automatically generate texture coords for water texture
    glEnable(GL_TEXTURE_GEN_S); //texture unit 0
    glEnable(GL_TEXTURE_GEN_T); //texture unit 0
    glTexGenf(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGenf(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);

    // Use the fact that we know all water faces are the same size
    // to save some computation

    // Slowly move texture coordinates over time so the watter appears
    // to be moving.
    F32 movement_period_secs = 50.f;

    F32 offset = fmod(gFrameTimeSeconds, movement_period_secs);

    if (movement_period_secs != 0)
    {
        offset /= movement_period_secs;
    }
    else
    {
        offset = 0;
    }

    F32 tp0[4] = { 16.f / 256.f, 0.0f, 0.0f, offset };
    F32 tp1[4] = { 0.0f, 16.f / 256.f, 0.0f, offset };

    glTexGenfv(GL_S, GL_OBJECT_PLANE, tp0);
    glTexGenfv(GL_T, GL_OBJECT_PLANE, tp1);

    glColor3f(1.f, 1.f, 1.f);

    for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
            iter != mDrawFace.end(); iter++)
    {
        LLFace *face = *iter;
        if (voskyp->isReflFace(face))
        {
            continue;
        }

        face->renderIndexed();
    }

    stop_glerror();

    // Reset the settings back to expected values
    glDisable(GL_TEXTURE_GEN_S); //texture unit 0
    glDisable(GL_TEXTURE_GEN_T); //texture unit 0

    gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
    gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
}

void LLDrawPoolWater::render(S32 pass)
{
	LLFastTimer ftm(FTM_RENDER_WATER);
	if (mDrawFace.empty() || LLDrawable::getCurrentFrame() <= 1)
	{
		return;
	}

	//do a quick 'n dirty depth sort
	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
			 iter != mDrawFace.end(); iter++)
	{
		LLFace* facep = *iter;
		facep->mDistance = -facep->mCenterLocal.mV[2];
	}

	std::sort(mDrawFace.begin(), mDrawFace.end(), LLFace::CompareDistanceGreater());

	LLGLEnable blend(GL_BLEND);

	if ((mVertexShaderLevel > 0) && !sSkipScreenCopy)
	{
		shade();
		return;
	}

	LLVOSky *voskyp = gSky.mVOSkyp;

	stop_glerror();

	if (!gGLManager.mHasMultitexture)
	{
		// Ack!  No multitexture!  Bail!
		return;
	}

	LLFace* refl_face = voskyp->getReflFace();

	gPipeline.disableLights();
	
	LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);

	LLGLDisable cullFace(GL_CULL_FACE);
	
	// Set up second pass first
	mWaterImagep->addTextureStats(1024.f*1024.f);
	gGL.getTexUnit(1)->activate();
	gGL.getTexUnit(1)->enable(LLTexUnit::TT_TEXTURE);
	gGL.getTexUnit(1)->bind(mWaterImagep) ;

	LLVector3 camera_up = LLViewerCamera::getInstance()->getUpAxis();
	F32 up_dot = camera_up * LLVector3::z_axis;

	LLColor4 water_color;
	if (LLViewerCamera::getInstance()->cameraUnderWater())
	{
		water_color.setVec(1.f, 1.f, 1.f, 0.4f);
	}
	else
	{
		water_color.setVec(1.f, 1.f, 1.f, 0.5f*(1.f + up_dot));
	}

	glColor4fv(water_color.mV);

	// Automatically generate texture coords for detail map
	glEnable(GL_TEXTURE_GEN_S); //texture unit 1
	glEnable(GL_TEXTURE_GEN_T); //texture unit 1
	glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);

	// Slowly move over time.
	F32 offset = fmod(gFrameTimeSeconds*2.f, 100.f);
	F32 tp0[4] = {16.f/256.f, 0.0f, 0.0f, offset*0.01f};
	F32 tp1[4] = {0.0f, 16.f/256.f, 0.0f, offset*0.01f};
	glTexGenfv(GL_S, GL_OBJECT_PLANE, tp0);
	glTexGenfv(GL_T, GL_OBJECT_PLANE, tp1);

	gGL.getTexUnit(1)->setTextureColorBlend(LLTexUnit::TBO_MULT, LLTexUnit::TBS_TEX_COLOR, LLTexUnit::TBS_PREV_COLOR);
	gGL.getTexUnit(1)->setTextureAlphaBlend(LLTexUnit::TBO_REPLACE, LLTexUnit::TBS_PREV_ALPHA);

	gGL.getTexUnit(0)->activate();
	
	glClearStencil(1);
	glClear(GL_STENCIL_BUFFER_BIT);
	LLGLEnable gls_stencil(GL_STENCIL_TEST);
	glStencilOp(GL_KEEP, GL_REPLACE, GL_KEEP);
	glStencilFunc(GL_ALWAYS, 0, 0xFFFFFFFF);

	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
		 iter != mDrawFace.end(); iter++)
	{
		LLFace *face = *iter;
		if (voskyp->isReflFace(face))
		{
			continue;
		}
		gGL.getTexUnit(0)->bind(face->getTexture());
		face->renderIndexed();
	}
//.........这里部分代码省略.........

// for low end hardware
void LLDrawPoolWater::renderOpaqueLegacyWater()
{
	LLVOSky *voskyp = gSky.mVOSkyp;

	LLGLSLShader* shader = NULL;
	if (LLGLSLShader::sNoFixedFunction)
	{
		if (LLPipeline::sUnderWaterRender)
		{
			shader = &gObjectSimpleNonIndexedTexGenWaterProgram;
		}
		else
		{
			shader = &gObjectSimpleNonIndexedTexGenProgram;
		}

		shader->bind();
	}

	stop_glerror();

	// Depth sorting and write to depth buffer
	// since this is opaque, we should see nothing
	// behind the water.  No blending because
	// of no transparency.  And no face culling so
	// that the underside of the water is also opaque.
	LLGLDepthTest gls_depth(GL_TRUE, GL_TRUE);
	LLGLDisable no_cull(GL_CULL_FACE);
	LLGLDisable no_blend(GL_BLEND);

	gPipeline.disableLights();

	//Singu note: This is a hack around bizarre opensim behavior. The opaque water texture we get is pure white and only has one channel.
	// This behavior is clearly incorrect, so we try to detect that case, purge it from the cache, and try to re-fetch the texture.
	// If the re-fetched texture is still invalid, or doesn't exist, we use transparent water, which is fine since alphablend is unset.
	// The current logic for refetching is crude here, and probably wont work if, say, a prim were to also have the texture for some reason,
	// however it works well enough otherwise, and is much cleaner than diving into LLTextureList, LLViewerFetchedTexture, and LLViewerTexture.
	// Perhaps a proper reload mechanism could be done if we ever add user-level texture reloading, but until then it's not a huge priority.
	// Failing to fully refetch will just give us the same invalid texture we started with, which will result in the fallback texture being used.
	if(mOpaqueWaterImagep != mWaterImagep)
	{
		if(mOpaqueWaterImagep->isMissingAsset())
		{
			mOpaqueWaterImagep = mWaterImagep;
		}
		else if(mOpaqueWaterImagep->hasGLTexture() && mOpaqueWaterImagep->getComponents() < 3)
		{
			LLAppViewer::getTextureCache()->removeFromCache(mOpaqueWaterImagep->getID());
			static bool sRefetch = true;
			if(sRefetch)
			{
				sRefetch = false;
				((LLViewerFetchedTexture*)mOpaqueWaterImagep.get())->forceRefetch();
			}
			else
				mOpaqueWaterImagep = mWaterImagep;
		}
	}
	mOpaqueWaterImagep->addTextureStats(1024.f*1024.f);

	// Activate the texture binding and bind one
	// texture since all images will have the same texture
	gGL.getTexUnit(0)->activate();
	gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
	gGL.getTexUnit(0)->bind(mOpaqueWaterImagep);

	// Automatically generate texture coords for water texture
	if (!shader)
	{
		glEnable(GL_TEXTURE_GEN_S); //texture unit 0
		glEnable(GL_TEXTURE_GEN_T); //texture unit 0
		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	}

	// Use the fact that we know all water faces are the same size
	// to save some computation

	// Slowly move texture coordinates over time so the water appears
	// to be moving.
	F32 movement_period_secs = 50.f;

	static const LLCachedControl<bool> freeze_time("FreezeTime",false);
	static F32 frame_time;
	if (!freeze_time) frame_time = gFrameTimeSeconds;
	F32 offset = fmod(frame_time, movement_period_secs);

	if (movement_period_secs != 0)
	{
		offset /= movement_period_secs;
	}
	else
	{
		offset = 0;
	}

	F32 tp0[4] = { 16.f / 256.f, 0.0f, 0.0f, offset };
	F32 tp1[4] = { 0.0f, 16.f / 256.f, 0.0f, offset };

//.........这里部分代码省略.........