//******************************************************************
//FUNCTION:
void COutdoorLightScattering::computeInscatteringIntegral(vec3f vRayStart, vec3f vRayEnd, vec3f vEarthCentre, vec3f vDirOnLight, vec2f& voNetParticleFromCam, vec3f& voRayleighInscattering, vec3f& voMieInscattering, const float vNumSteps /*= 7*/)
{
voNetParticleFromCam[0] = voNetParticleFromCam[1] = 0.0;
voRayleighInscattering[0] = voRayleighInscattering[1] = voRayleighInscattering[2] = 0.0;
voMieInscattering[0] = voMieInscattering[1] = voMieInscattering[2] = 0.0;
normalizeVector(vDirOnLight);
computeScatteringCoefficients();
vec3f Steps = (vRayEnd - vRayStart) / vNumSteps;
float StepLen = sqrt(Steps[0]*Steps[0] + Steps[1]*Steps[1] + Steps[2]*Steps[2]);
for (float StepNum = 0.5; StepNum < vNumSteps; StepNum += 1.0)
{
vec3f CurrPos = vRayStart + Steps * StepNum;
vec2f ParticleDensity, NetParticleDensityToAtmTop;
__getAtmosphereProperties(CurrPos, vEarthCentre, vDirOnLight, ParticleDensity, NetParticleDensityToAtmTop);
NetParticleDensityToAtmTop = __IntegrateParticleDensityAlongRay(CurrPos, vDirOnLight, vEarthCentre);
voNetParticleFromCam += ParticleDensity * StepLen;
vec3f RlghInsctr, MieInsctr;
RlghInsctr[0] = RlghInsctr[1] = RlghInsctr[2] = 0.0;
MieInsctr[0] = MieInsctr[1] = MieInsctr[2] = 0.0;
__computePointDiffInscattering(ParticleDensity, voNetParticleFromCam, NetParticleDensityToAtmTop, RlghInsctr, MieInsctr);
voRayleighInscattering += RlghInsctr * StepLen;
voMieInscattering += MieInsctr * StepLen;
}
float CosBetha = computeCosBetha(vRayStart - vRayEnd, vDirOnLight);
__applyPhaseFunction(voRayleighInscattering, voMieInscattering, CosBetha);
vec3f LightInScattering = voRayleighInscattering + voMieInscattering;
}
RenderSetting::RenderSetting() noexcept
: window(nullptr)
, width(0)
, height(0)
, dpi_w(0)
, dpi_h(0)
, deviceType(GraphicsDeviceType::GraphicsDeviceTypeOpenGL)
, swapInterval(GraphicsSwapInterval::GraphicsSwapIntervalVsync)
, pipelineType(RenderPipelineType::RenderPipelineTypeDeferredLighting)
, shadowMode(ShadowMode::ShadowModeSoft)
, shadowQuality(ShadowQuality::ShadowQualityMedium)
, enableSSDO(true)
, enableAtmospheric(false)
, enableSSR(false)
, enableSSSS(false)
, enableLightShaft(false)
, enableDOF(false)
, enableMotionBlur(false)
, enableHDR(true)
, enableColorGrading(false)
, enableFXAA(true)
, enableGlobalIllumination(false)
, earthRadius(6360000.f, 6440000.f)
, earthScaleHeight(7994.f, 2000.f)
, minElevation(0.0f)
, maxElevation(80000.0f)
, rayleighAngularSctrCoeff(0)
, rayleighExtinctionCoeff(0)
, mieAngularSctrCoeff(0)
, mieExtinctionCoeff(0)
, mie(0.97f)
, density(1.0f)
{
computeScatteringCoefficients();
}
