void VLensFlareComponent::UpdateVisibility (float& fLastVisibilityQuery, float& fCurrentVisibility)
{
// Make sure we are actually attached to an object
if (GetOwner())
{
// Get Camera
VisRenderContext_cl* pContext = VisRenderContext_cl::GetCurrentContext();
const hkvVec3 vCameraPos = pContext->GetCamera()->GetPosition();
// Get Light
VisLightSource_cl* pLight = (VisLightSource_cl*)GetOwner();
hkvVec3 vPos;
pLight->GetVirtualPosition( vPos, pContext );
hkvVec3 vDist = vCameraPos - vPos;
float fDist = vDist.getLength();
float fFactor = 1.0f;
// Distance FadeOut
if (FadeOutEnd != 0 && FadeOutStart < FadeOutEnd)
{
if (fDist > FadeOutEnd)
{
fFactor = 0.0f;
}
else if (fDist > FadeOutStart)
{
fFactor = 1.0f - (fDist - FadeOutStart) / (FadeOutEnd - FadeOutStart);
}
}
// Apply distance fade out
fLastVisibilityQuery *= fFactor;
// PreGlow/AfterGlow
if (fLastVisibilityQuery > fCurrentVisibility)
{
float fSpeed = Vision::GetTimer()->GetTimeDifference() / ((PreGlowMS + 1) * 0.001f);
fCurrentVisibility = hkvMath::Min(fCurrentVisibility + fSpeed, fLastVisibilityQuery);
}
else if (fLastVisibilityQuery < fCurrentVisibility)
{
float fSpeed = Vision::GetTimer()->GetTimeDifference() / ((AfterGlowMS + 1) * 0.001f);
fCurrentVisibility = hkvMath::Max(fCurrentVisibility - fSpeed, fLastVisibilityQuery);
}
fCurrentVisibility = hkvMath::clamp(fCurrentVisibility, 0.0f, 1.0f);
}
}
bool VOcclusionQueryObjectPixelCounterLensFlare::Render(VOcclusionQuery &query, const hkvAlignedBBox &safeBox)
{
if (m_pLensFlare != NULL && m_pLensFlare->GetOwner() != NULL)
{
SetState(VISQUERY_RENDERSTATE_BILLBOARD);
VisRenderContext_cl* pContext = VisRenderContext_cl::GetCurrentContext();
VisLightSource_cl* pLight = (VisLightSource_cl*)m_pLensFlare->GetOwner();
hkvVec3 vPos(hkvNoInitialization);
pLight->GetVirtualPosition(vPos, pContext);
hkvVec3 vCameraDir = pContext->GetCamera()->GetPosition() - vPos;
vCameraDir /= hkvMath::Max(vCameraDir.getLength(), HKVMATH_LARGE_EPSILON);
vPos += vCameraDir * m_pLensFlare->GetDepthBias();
query.DoHardwareOcclusionTest_Billboard(&vPos.x, m_pLensFlare->GetCheckBlockSize());
return true;
}
return false;
}
void VCoronaManager::RenderCorona (VCoronaCandidate& coronaCandidate, VTextureObject*& pTexture)
{
#ifdef SUPPORTS_CORONAS
VCoronaComponent *pCorona = coronaCandidate.m_pCorona;
VisRenderContext_cl* pContext = VisRenderContext_cl::GetCurrentContext();
VisLightSource_cl* pLight = (VisLightSource_cl*)pCorona->GetOwner();
hkvVec3 vLightPos(hkvNoInitialization);
pLight->GetVirtualPosition(vLightPos, pContext);
hkvVec3 vEyePos(hkvNoInitialization);
pContext->GetCamera()->GetPosition(vEyePos);
hkvVec3 vDir = pContext->GetCamera()->GetDirection();
// Corona texture
VTextureObject *pTex = pCorona->GetCoronaTexture();
if (pTex == NULL)
return;
if (pTexture != pTex)
{
pTexture = pTex;
Vision::RenderLoopHelper.BindMeshTexture(pTexture,0);
}
// Get light color
VColorRef color = pLight->GetColor();
hkvVec3 vDist = vLightPos - vEyePos;
float fEyeDist = vDir.dot(vDist);
//determine if camera is in light cone if the light is directional
float fDirectionalDampening = 1.0f;
if ( pLight->GetType() == VIS_LIGHT_SPOTLIGHT && pCorona->GetOnlyVisibleInSpotLight() )
{
fDirectionalDampening = 0.0f;
float fConeAngle = pLight->GetProjectionAngle();
float fConeLength = pLight->GetRadius();
hkvVec3 fConeDirection = pLight->GetDirection();
fConeDirection.normalize();
hkvVec3 vLightEyeDist = vEyePos - vLightPos;
//#2 check if the camera is inside the angle of the cone
float cosinusAngle = (vLightEyeDist/vLightEyeDist.getLength()).dot(fConeDirection);
float fDegree = hkvMath::acosDeg(cosinusAngle);
float normRadius = fDegree / (fConeAngle/2.0f);
if (normRadius < 1.0f)
{
//hardcoded falloff. For better performance, we avoid sampling the projection texture here.
const float fEpsilon = 64.0f/256.0f;
const float fQuadFactor = 1.0f/fEpsilon - 1.0f;
fDirectionalDampening = 1.0f / (1.0f + fQuadFactor*normRadius*normRadius);
// scale the function so that the value is exactly 0.0 at the edge and 1.0 in the center
fDirectionalDampening = (fDirectionalDampening - fEpsilon) / (1.0f - fEpsilon);
}
}
// Fog params
float fFogDampening = 1.0f;
if (pLight->GetType() != VIS_LIGHT_DIRECTED && Vision::World.IsLinearDepthFogEnabled())
{
const VFogParameters &fog = Vision::World.GetFogParameters();
float fFogStart = fog.fDepthStart;
float fFogEnd = fog.fDepthEnd;
float fFogFactor = (fFogEnd > fFogStart) ? ((fEyeDist - fFogStart) / (fFogEnd - fFogStart)) : 0.f;
fFogDampening = 1.0f - hkvMath::clamp(fFogFactor, 0.0f, 1.0f);
}
// Get corona rotation
float fRotation = 0.0f;
hkvVec4 vRotation(1.0f, 0.0f, 0.0f, 1.0f);
if (pCorona->CoronaFlags & VIS_CORONASCALE_ROTATING)
{
fRotation = hkvMath::mod (fEyeDist * 0.5f, 360.f);
vRotation.x = hkvMath::cosDeg (fRotation);
vRotation.y = -hkvMath::sinDeg (fRotation);
vRotation.z = -vRotation.y;
vRotation.w = vRotation.x;
}
// Texture dimensions
int iSizeX, iSizeY, depth;
pTex->GetTextureDimensions(iSizeX, iSizeY, depth);
hkvVec4 vScale(0.0f, 0.0f, 0.0f, 0.0f);
int iMainWidth, iMainHeight, iWidth, iHeight;
pContext->GetSize(iWidth, iHeight);
VisRenderContext_cl::GetMainRenderContext()->GetSize(iMainWidth, iMainHeight);
// Preserve texture aspect ratio
int iTexHeight = pTex->GetTextureHeight();
int iTexWidth = pTex->GetTextureWidth();
// Perspective scaling
// This scaling ensures roughly the same size on 720p as the old implementation.
vScale.z = iTexWidth * pCorona->CoronaScaling * 0.25f;
vScale.w = iTexHeight * pCorona->CoronaScaling * 0.25f;
// Screen-space scaling
// This scaling ensures roughly the same size on 720p as the old implementation.
const float fScaleFactor = pCorona->CoronaScaling * iMainHeight / 11.0f;
vScale.x = ((float)iTexWidth / 128.0f) * fScaleFactor * (float(iWidth) / float(iMainWidth));
vScale.y = ((float)iTexHeight / 128.0f) * fScaleFactor * (float(iHeight) / float(iMainHeight));
vScale.x *= 2.0f / iWidth;
vScale.y *= 2.0f / iHeight;
// Scale by visibility
if (pCorona->CoronaFlags & VIS_CORONASCALE_VISIBLEAREA)
{
vScale.x *= coronaCandidate.m_fCurrentVisibility;
vScale.y *= coronaCandidate.m_fCurrentVisibility;
vScale.z *= coronaCandidate.m_fCurrentVisibility;
vScale.w *= coronaCandidate.m_fCurrentVisibility;
}
VCompiledShaderPass* pShader = m_spCoronaTechnique->GetShader(0);
VShaderConstantBuffer *pVertexConstBuffer = pShader->GetConstantBuffer(VSS_VertexShader);
// xyz = worldspace position, w = 1.0 if VIS_CORONASCALE_DISTANCE is true, otherwise zero.
pVertexConstBuffer->SetSingleParameterF("coronaPosition", vLightPos.x, vLightPos.y, vLightPos.z, (pCorona->CoronaFlags & VIS_CORONASCALE_DISTANCE) ? 1.0f : 0.0f);
// xyz = light color, w = corona visibility.
pVertexConstBuffer->SetSingleParameterF("coronaColor", color.r/255.0f, color.g/255.0f, color.b/255.0f, coronaCandidate.m_fCurrentVisibility * fFogDampening * fDirectionalDampening);
// xyzw = 2x2 rotation matrix. float2x2 is not supported in shader model 2, so a float4 is used and multiplication is done manually in the shader.
pVertexConstBuffer->SetSingleParameterF("coronaRotation", vRotation.x, vRotation.y, vRotation.z, vRotation.w);
// xy = screen-space scaling. zw = view-space scaling.
pVertexConstBuffer->SetSingleParameterF("coronaScale", vScale.x, vScale.y, vScale.z, vScale.w);
Vision::RenderLoopHelper.RenderMeshes(pShader, VisMeshBuffer_cl::MB_PRIMTYPE_TRILIST, 0, 2, 6);
#endif
}