cvcamera.cpp

来自「Windows上的MUD客户端程序」· C++ 代码 · 共 825 行 · 第 1/2 页

		}
	}
	up.normalize();

	SetLoc(*(GxVec3f*)&loc)->SetUp(*(GxVec3f*)&up)->SetDir(*(GxVec3f*)&dir);
}

#if (defined(CH_USE_RLAB) || defined(CH_USE_D3D))

ChQvPCameraRenderData * ChQvPCameraRenderData::Select()
{
	m_pRC->LockScene();
	// Make this camera the current one for the RC
	if(m_boolNew)
	{
		 // We only need to compute all this stuff if we are using this camera for the first time
		 // Otherwise, we remember from the last time selected
		GxVec3f	up, yAxis(0.0f, 1.0f, 0.0f);		// starting loc for look dirs
		GxVec3f	dir, dira(0.0f, 0.0f, -1.0f);		// will rotate later
		GxVec3f 	loc, axis;
		float angle, heightAngle, height;
		float nearDistance, farDistance;

		// Get the node's data; be safe about it
		if(m_boolPerspective)
		{
			QvPerspectiveCamera *pCamera = (QvPerspectiveCamera*)((QvNode*)m_pCamera);
			Qv2Gx(pCamera->position, loc);
			Qv2Gx(pCamera->orientation.axis, axis);
			angle = pCamera->orientation.angle;
			heightAngle = pCamera->heightAngle.value;
			nearDistance = pCamera->nearDistance.value;
			farDistance = pCamera->farDistance.value;
		}
		else
		{
			QvOrthographicCamera *pCamera = (QvOrthographicCamera*)((QvNode*)m_pCamera);
			Qv2Gx(pCamera->position, loc);
			Qv2Gx(pCamera->orientation.axis, axis);
			angle = pCamera->orientation.angle;
			height = pCamera->height.value;
			nearDistance = pCamera->nearDistance.value;
			farDistance = pCamera->farDistance.value;
		}

		angle = -angle;

		ChNrViewport view = m_pRC->GetViewport();
		ChNrFrame cameraFrame; 
		ChNrViewportGetCamera(view, cameraFrame);


		// Inventor puts the camera in transformed world (model) coordinates,
		// RLAB's camera is in the base frame. Apply our stack transform to the 
		// frame, then apply the camera loc and direction. 
		// Remember VRML is RHS, but RLab is LHS

		GxTransform3Wf	stackMat = m_transform;
		ChNrFrameAddTransform(cameraFrame, CombineReplace, *(stackMat.GetMatrix())); // TODO make an intermediate frame for this
		GxTransform3Wf	rotMat(axis, -angle);

											  
		GxTransform3Wf cameraMat = rotMat;		  // up/down has nothing to do with the transform jwd 12/7/95

		dir = cameraMat * dira;
		dir.normalize();

		if(m_pRC->GetViewerMode() != walk )
		{
			up  = cameraMat * yAxis;
		}
		else						// We're walking; keep camera level
		{							// This computation is not pure VRML,
									// but it keeps camera manipulations much cleaner for
									// walking situations. The camera acts more camera-like 
									// and less airplane-like.

			GxVec3f n = yAxis.cross(dir);				// normal to plane defined by (dir, yaxis)

			if (n.dot(n) > SMIDGEON)
			{
				up = dir.cross(n);
			}
			else
			{
				// special case; looking straight up or down
				up  = cameraMat * yAxis;
			} 

			if (up.dot(up) < SMIDGEON)
			{
				up = yAxis;
			}
		}
		up.normalize();
	
		SetLoc(*(GxVec3f*)&loc)->SetUp(*(GxVec3f*)&up)->SetDir(*(GxVec3f*)&dir);
		SetStartLoc(*(GxVec3f*)&loc)->SetStartUp(*(GxVec3f*)&up)->SetStartDir(*(GxVec3f*)&dir);
		m_boolNew = false;
		D3DRelease(cameraFrame);
	}

	SetDirty(false);


	SetRenderer();
	m_pRC->CreateHeadlight();
    // ChNrFrameAddLight(m_pRC->GetFrame(), RLCreateLightRGB(ChNrLightAmbient, RLVal(0.2), RLVal(0.2), RLVal(0.2)));


	// Now let's save the matrices into the render data for later use
	
	#if 0		
	memcpy(pRenderData->m_cameraTransform, G3dGetModelCamMatrix(hGC), sizeof(pRenderData->m_cameraTransform));
	memcpy(pRenderData->m_invCameraTransform, G3dGetInverseModelCamMatrix(hGC), sizeof(pRenderData->m_invCameraTransform));
	G3dSetActiveStack(hGC, G3DT_CAM_CLIP);
	GxTransformF_t mat;
	G3dGetTransform(hGC, mat);	   
	pRenderData->m_camClipTransform	= GxTransform3Wf(mat);
	G3dSetActiveStack(hGC, G3DT_MODEL);
	#else
	//#pragma message("Saving of camera transforms not done.")
	#endif

	m_pRC->UnlockScene();

	return this;
}

ChQvPCameraRenderData * ChQvPCameraRenderData::SetRenderer(bool boolNow)
{
	if(!boolNow)
	{
		m_boolRendererDirty = true;
	}
	else if(m_boolRendererDirty)
	{
		m_boolRendererDirty = false;
		m_pRC->LockScene();
		// Set this camera's settings into the RC, viewport, etc.

		float heightAngle, height;
		float nearDistance, farDistance;

		// Get the node's data; be safe about it
		if(m_boolPerspective)
		{
			QvPerspectiveCamera *pCamera = (QvPerspectiveCamera*)((QvNode*)m_pCamera);
			heightAngle = pCamera->heightAngle.value;
			nearDistance = pCamera->nearDistance.value;
			farDistance = pCamera->farDistance.value;
		}
		else
		{
			QvOrthographicCamera *pCamera = (QvOrthographicCamera*)((QvNode*)m_pCamera);
			height = pCamera->height.value;
			nearDistance = pCamera->nearDistance.value;
			farDistance = pCamera->farDistance.value;
		}


		ChNrViewport view = m_pRC->GetViewport();
		ChNrFrame cameraFrame;		
		ChNrViewportGetCamera(view, cameraFrame);	// Release is well below here

		ChNrViewportSetProjection(view, m_boolPerspective ? ProjectPerspective : ProjectOrthographic );


		// Inventor puts the camera in transformed world (model) coordinates,
		// RLAB's camera is in the base frame. Apply our stack transform to the 
		// frame, then apply the camera loc and direction. 
		// Remember VRML is RHS, but RLab is LHS

		GxTransform3Wf	stackMat = m_transform;

		ChNrFrameAddTransform(cameraFrame, CombineReplace, *(stackMat.GetMatrix())); // TODO make an intermediate frame for this
		ChNrFrameAddScale(cameraFrame, CombineBefore, 1., 1., -1.);	  // ???   --
		GxTransform3Wf theTransform;
		GxVec3f dir = m_dir, up = m_up;
		dir.z() = -dir.z();
		up.z() = -up.z();
		theTransform.LookAt( dir, up, false);	   // --
		ChNrFrameAddTranslation(cameraFrame, CombineBefore, m_loc.x(), m_loc.y(), -m_loc.z());	// z alrady scaled	- ???
		ChNrFrameAddTransform(cameraFrame, CombineBefore, *(theTransform.GetMatrix()));

		#if 0

		ChNrFrameAddTransform(cameraFrame, CombineReplace, *(stackMat.GetMatrix())); // TODO make an intermediate frame for this
	

		GxTransform3Wf theTransform;
		GxVec3f dir = -m_dir, up = -m_up;
		theTransform.LookAt( dir, up, false);	   // --
		ChNrFrameAddTranslation(cameraFrame, CombineBefore, m_loc.x(), m_loc.y(), m_loc.z());	// z alrady scaled	- ???
		ChNrFrameAddTransform(cameraFrame, CombineBefore, *(theTransform.GetMatrix()));
		ChNrFrameAddScale(cameraFrame, CombineBefore, 1., 1.,1.);	  // ???   --
		#endif

		// Massage the front and back planes to enclose the whole scene if possible.
		// If the version is 1.0 and nearDistance is 1.0, ignore it
		float fNear = nearDistance;
		if(true && fNear == 1.0)	// for >= vrml 1.1
		{
			fNear = .01;
		} 
		float fFar = 8000.;
		//const float maxZResolution = 32000.;	// Assuming ?? bits signed
		const float maxZResolution = 8000.;	// Assuming ?? bits signed
		ChMazeWnd * pWnd = (ChMazeWnd *)(m_pRC->GetWnd());
		if(pWnd->GetBounds())
		{				   
							// Compute based on scene bounds, and
							// multiply in a little fudge factor for luck
			fFar = 1.5 * pWnd->GetBounds()->GetFarDistance(m_loc.x(), m_loc.y(), m_loc.z());
			//fFar *= 40.;	// Work in the front of the buffer; we get less problems that way
			fFar *= 15.;	// Work in the front of the buffer; we get less problems that way

		}
		float minNear = fFar / maxZResolution;	   // lessen zbuffer roundoff error
		fNear = max(fNear, minNear);
		ChNrViewportSetFront(view, fNear);
		ChNrViewportSetBack(view, fFar);

		m_right 	=  ChNrViewportGetWidth(view);		/* right */        
		m_left  	=  0.0f;					/* left*/          
		m_top   	=  ChNrViewportGetHeight(view);		/* top */          
		m_bottom	=  0.0f;					/* bottom */ 
	      
		// RL uses largest dimension to match to "field", so if this is
		// width, adjust accordingly, since VRML is height-based.
		float fieldHeight;
	
		if (m_boolPerspective)
		{
			fieldHeight = fNear * tan(heightAngle / 2.);
		}
		else
		{
			fieldHeight = height / 2;
		}											

		float aspect = float(ChNrViewportGetHeight(view)) / ChNrViewportGetWidth(view);
		if (aspect < 1.0) fieldHeight /= aspect; 
		ChNrViewportSetField(view, fieldHeight);

		D3DRelease(cameraFrame);   // matches 'GetCamera'
		m_pRC->UnlockScene();
	}

	return this;
}

void ChQvPCameraRenderData::GetOrientationTransform(GxTransform3Wf &theTransform)
{
	GxVec3f dir = m_dir, up = m_up;
	dir.z() = -dir.z();
	up.z() = -up.z();
	theTransform.LookAt( dir, up, false);	   // --
}
float ChQvPCameraRenderData::GetHither()
{
	if(!m_pRC) return .01;
	ChNrViewport view = m_pRC->GetViewport();
	return ChNrViewportGetFront(view);
}
float ChQvPCameraRenderData::GetYon()
{
	if(!m_pRC) return 1.;
	ChNrViewport view = m_pRC->GetViewport();
	return ChNrViewportGetBack(view);
}
#endif


#if defined(CH_USE_3DR)
void ChQvPCameraRenderData::TransformPoint( const GxVec3f &src, GxVec3f &dst )
{
	::TransformPoint( *((PointF_t*)(&src)), *((PointF_t*)(&dst)), m_cameraTransform);
}

void ChQvPCameraRenderData::InverseTransformPoint( const GxVec3f &src, GxVec3f &dst )
{
	::TransformPoint( *((PointF_t*)(&src)), *((PointF_t*)(&dst)), m_invCameraTransform);
}

void ChQvPCameraRenderData::TransformNormal( const GxVec3f &src, GxVec3f &dst )
{
	PointF_t tmp;
	G3dTransformNormalF( ((PointF_t*)(&src)), ((PointF_t*)(&tmp)), m_cameraTransform );
	dst.set(tmp.x, tmp.y, tmp.z);
}

void ChQvPCameraRenderData::InverseTransformNormal( const GxVec3f &src, GxVec3f &dst )
{
	PointF_t tmp;
	G3dTransformNormalF( ((PointF_t*)(&src)), ((PointF_t*)(&tmp)), m_invCameraTransform );
	dst.set(tmp.x, tmp.y, tmp.z);
}

#else
//#pragma message("Bunch of camera transform methods Not done!")
#endif


bool ChQvPCameraRenderData::OnSetOrientation(ChRenderContext *pRC, ChApplet * pApplet, ChIVrmlEvent *pEventList)
{
	bool boolSuccess = true;
#if defined(CH_VRML_EVENTS)
	// Change the orientation value, and dirty the context so it takes effect
	float axis[3];
	float angle;
	ChRotationEvent *pEvent = (ChRotationEvent *)pEventList;
	pEvent->GetValue(axis, angle);

	string strType;
	nodeType typ = nodeType(m_pNode->GetType(strType));
	QvSFRotation *pRotation = 0;

	if(typ == typeQvOrthographicCamera)
	{
		pRotation = &(((QvOrthographicCamera *)m_pNode)->orientation);
	}
	else if(typ == typeQvPerspectiveCamera)
	{
		pRotation = &(((QvPerspectiveCamera *)m_pNode)->orientation);
	}

	pRotation->axis[0] = axis[0];
	pRotation->axis[1] = axis[1];
	pRotation->axis[2] = axis[2];
	pRotation->angle = angle;

	// Now update the camera settings from the Qv values
	if(m_pNode == pRC->GetCurrentCamera())
	{
		// Stop navigating - If we are spinning, everything screws up
		((ChMazeWnd*)(pRC->GetWnd()))->GetSceneNavigator()->SetState(ChVrmlStateTransition::s_start);
	}
	Synch();
	if(m_pNode == pRC->GetCurrentCamera())
	{
		SetRenderer();

			// And set the context dirty
		pRC->SetDirty();
	}
#endif

	return boolSuccess;
}

bool ChQvPCameraRenderData::OnSetPosition(ChRenderContext *pRC, ChApplet * pApplet, ChIVrmlEvent *pEventList)
{
	bool boolSuccess = false;
#if defined(CH_VRML_EVENTS)

	// Change the position value, and dirty the context so it takes effect
	float position[3];
	ChVec3fEvent *pEvent = (ChVec3fEvent *)pEventList;
	pEvent->GetValue(position);

	string strType;
	nodeType typ = nodeType(m_pNode->GetType(strType));
	QvSFVec3f *pPosition = 0;

	if(typ == typeQvOrthographicCamera)
	{
		pPosition = &(((QvOrthographicCamera *)m_pNode)->position);
	}
	else if(typ == typeQvPerspectiveCamera)
	{
		pPosition = &(((QvPerspectiveCamera *)m_pNode)->position);
	}
	else
	{
		boolSuccess = false;
	}

	pPosition->value[0] = position[0];
	pPosition->value[1] = position[1];
	pPosition->value[2] = position[2];

	// Now update the camera settings from the Qv values
	if(m_pNode == pRC->GetCurrentCamera())
	{
		// Stop navigating - If we are spinning, everything screws up
		((ChMazeWnd*)(pRC->GetWnd()))->GetSceneNavigator()->SetState(ChVrmlStateTransition::s_start);
	}
	Synch();
	if(m_pNode == pRC->GetCurrentCamera())
	{
		SetRenderer();

			// And set the context dirty
		pRC->SetDirty();
	}


#endif

	return boolSuccess;
}

#if (defined(CH_USE_RLAB) || defined(CH_USE_D3D)) || defined(CH_USE_D3D)
bool ChQvPCameraRenderData::OnTick()
{
	  // 'move' tick
	SetRenderer(true);
	return true;
}
#endif