Function RenderViewpoint

source/core/rendering/hw_entrypoint.cpp:111–194

//-----------------------------------------------------------------------------

void RenderViewpoint(FRenderViewpoint& mainvp, IntRect* bounds, float fov, float ratio, float fovratio, bool mainview, bool toscreen)
{
	auto& RenderState = *screen->RenderState();

	/*
	if (mainview && toscreen)
	{
		screen->SetAABBTree(camera->Level->aabbTree);
		screen->mShadowMap.SetCollectLights([=] {
			CollectLights(camera->Level);
		});
		screen->UpdateShadowMap();
	}
	*/

	// Render (potentially) multiple views for stereo 3d
	// Fixme. The view offsetting should be done with a static table and not require setup of the entire render state for the mode.
	auto vrmode = VRMode::GetVRMode(mainview && toscreen);
	const int eyeCount = vrmode->mEyeCount;
	screen->FirstEye();
	hw_int_useindexedcolortextures = eyeCount > 1? false : *hw_useindexedcolortextures;

	for (int eye_ix = 0; eye_ix < eyeCount; ++eye_ix)
	{
		const auto& eye = vrmode->mEyes[eye_ix];
		screen->SetViewportRects(bounds);

		if (mainview) // Bind the scene frame buffer and turn on draw buffers used by ssao
		{
			bool useSSAO = (gl_ssao != 0);
			screen->SetSceneRenderTarget(useSSAO);
			RenderState.SetPassType(useSSAO ? GBUFFER_PASS : NORMAL_PASS);
			RenderState.EnableDrawBuffers(RenderState.GetPassDrawBufferCount(), true);
		}

		auto di = HWDrawInfo::StartDrawInfo(nullptr, mainvp, nullptr);
		di->SetVisibility();
		auto& vp = di->Viewpoint;
		vp = mainvp;

		di->Set3DViewport(RenderState);
		float flash = 8.f / (r_scenebrightness + 8.f);
		di->Viewpoint.FieldOfView = FAngle::fromDeg(fov);	// Set the real FOV for the current scene (it's not necessarily the same as the global setting in r_viewpoint)

		// Stereo mode specific perspective projection
		di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio, false);

		// Stereo mode specific viewpoint adjustment
		if (eye.mShiftFactor != 0)
		{
			vp.Pos += eye.GetViewShift(vp.HWAngles.Yaw.Degrees());
			sectortype* sect = &sector[vp.SectCount];
			updatesector(DVector2(vp.Pos.X, -vp.Pos.Y), &sect);
			vp.SectCount = sectindex(sect);
		}

		di->SetupView(RenderState, vp.Pos.X, vp.Pos.Y, vp.Pos.Z, false, false);
		di->ProcessScene(toscreen);