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245 lines
6.5 KiB
C++
245 lines
6.5 KiB
C++
/***********************************************************************************************
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*
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* Copyright © DreamWorks Interactive. 1997
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*
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* Contents:
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* A helper library for render caching.
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*
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* Bugs:
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*
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* To do:
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*
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***********************************************************************************************
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*
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* $Log:: /JP2_PC/Source/Lib/Renderer/RenderCacheHelp.hpp $
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*
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* 16 9/01/98 6:29p Mmouni
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* Moved DumpMoveStopLists() function declaration.
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*
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* 15 5/05/98 1:34p Pkeet
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* Altered includes to include the render cache private header file.
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*
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* 14 4/22/98 4:51p Pkeet
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* Removed the 'bPLANE_FRONT' macro switch.
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*
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* 13 2/13/98 6:58p Pkeet
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* Added the 'uBuildPartitionList' function.
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*
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* 12 2/13/98 5:57p Pkeet
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* Altered the 'GetBoundingCoords' to accept a bool argument that is 'true' if the number of
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* points in the point cloud is below the maximum allowed.
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*
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* 11 12/21/97 11:02p Rwyatt
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* Changed references to CMArrays to CDArrays
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*
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* 10 97/10/28 3:35p Pkeet
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* Removed unnecessary and unused render cache code.
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*
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* 9 97/10/24 6:59p Pkeet
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* Added STL lists to represent moving cache objects.
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*
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* 8 97/10/17 2:18p Pkeet
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* Changed function to work on minimum projected Z (in normalized camera space).
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*
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* 7 97/10/17 11:42a Pkeet
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* Added code to find the closest point to the camera.
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*
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* 6 97/08/04 6:19p Pkeet
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* Removed the camera parameter from the 'GetBoundingCoords' function. Added the
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* 'v3GetCameraPos' function.
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*
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* 5 97/07/15 1:03p Pkeet
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* Changed 'GetMinMaxCameraCoords' to 'GetBoundingCoords.'
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*
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* 4 97/06/27 1:41p Pkeet
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* Added support for setting near and far clipping planes for a cached partition.
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*
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* 3 97/03/21 1:59p Pkeet
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* Changed a 'GetMinMaxCameraCoords' parameter.
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*
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* 2 97/03/19 12:24p Pkeet
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* Moved the 'SetCameraProperties' and 'DrawBorder' functions to the helper module.
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*
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* 1 97/03/18 5:41p Pkeet
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* Initial implementation.
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*
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**********************************************************************************************/
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#ifndef HEADER_LIB_RENDERER_RENDERCACHEHELP_HPP
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#define HEADER_LIB_RENDERER_RENDERCACHEHELP_HPP
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//
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// Includes.
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//
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#include <list>
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#include "Lib/Transform/Vector.hpp"
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#include "Lib/Transform/Rotate.hpp"
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#include "Lib/Sys/FastHeap.hpp"
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//
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// Defines and constants.
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//
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const float fFUDGE = 1.01;
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const int iMIN_RASTER_SIZE = 4;
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//
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// Forward declarations.
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//
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class CPartition;
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class CCamera;
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class CRaster;
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//
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// Typedefs.
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//
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// Type used to maintain a list of partition pointers.
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typedef std::list<CPartition*> TPPartitionList;
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//
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// Class definitions.
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//
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//*********************************************************************************************
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//
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class CClosestRenderPoint
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//
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// Object contains information about the closest point found to the render cache.
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//
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// Prefix: crp
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//
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//**************************************
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{
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public:
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CVector3<> v3ClosestMeshPt;
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TReal rMinProjectedZ;
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bool bFoundFirst;
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public:
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//*****************************************************************************************
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//
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// Constructor.
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//
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// Default constructor.
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CClosestRenderPoint();
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//*****************************************************************************************
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//
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// Member functions.
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//
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//*****************************************************************************************
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//
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void Try
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(
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const CVector3<>& v3_mesh,
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TReal r_min_projected_z
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);
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//
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// Tests if the point is the closest point to the camera and store the new mesh point and
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// normalized camera space y value if it is.
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//
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//**************************************
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};
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//
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// Global functions.
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//
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//*********************************************************************************************
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//
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void SetCameraProperties
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(
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CCamera& cam_new, // Local camera.
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rptr<CRaster> pras, // Screen for camera.
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TReal r_distance, // Projection distance for points.
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CVector3<>& rv3_coord_min, // Maximum local coordinates.
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CVector3<>& rv3_coord_max // Maximum local coordinates.
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);
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//
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// Sets up a new camera given a screen and local screen coordinates.
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//
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//**************************************
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//*********************************************************************************************
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//
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uint uBuildPartitionList
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(
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TPPartitionList& rpartlist, // Resulting list of partitions.
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CPartition* ppart, // Root partition.
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const CVector3<>& v3_pos // Viewer (camera) position.
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);
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//
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// Builds a list of visible partitions.
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//
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// Returns the number of points in the point cloud.
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//
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//**************************************
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//*********************************************************************************************
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//
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void GetBoundingCoords
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(
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CPartition* ppart, // Partition to find extents of.
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const CTransform3<>& tf3_cam, // Partial camera transform.
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TReal r_distance, // Projection distance for points.
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CDArray< CVector2<> >& av2_convex, // Points that make up the convex shell.
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CVector3<>& rv3_min, // Minimum z extent.
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CVector3<>& rv3_max, // Maximum z extent.
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CClosestRenderPoint& rcrp, // Closest y point.
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bool b_use_box, // Use the bounding box only.
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bool b_add_points // Add points to 'av2_convex.'
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);
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//
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// Adds points defining the bounding coordinates of the partition to the convex point array.
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//
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// Stores the minimum and maximum x, y and z values.
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//
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// Returns 'true' if the number of bounding coordinates is in range.
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//
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//**************************************
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//*********************************************************************************************
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//
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void FudgeRange
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(
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CVector3<>& rv3_min, // Minimum value.
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CVector3<>& rv3_max, // Maximum value.
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TReal r_expand = TReal(0.5) // Value to expand range by.
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);
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//
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// Increase these coords by a fudge factor to ensure that the entire image will render inside
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// the raster without clipping or overrun.
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//
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//**************************************
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//*********************************************************************************************
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//
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CVector3<> v3GetCameraPos
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(
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const CCamera& cam // Camera for projection.
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);
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//
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// Returns the current or predicted position of the camera.
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//
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//**************************************
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//
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// Global variables.
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//
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extern TPPartitionList ppartlistMoved; // List of moving partitions.
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extern TPPartitionList ppartlistStopped; // List of stopped partitions.
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#endif // HEADER_LIB_RENDERER_RENDERCACHEHELP_HPP
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