85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: sheet definitions for particles and other sprite functions
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//
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//===========================================================================//
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#ifndef PSHEET_H
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#define PSHEET_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier1/utlobjectreference.h"
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class CUtlBuffer;
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// classes for keeping a dictionary of sheet files in memory. A sheet is a bunch of frames packewd
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// within one texture. Each sheet has 1 or more frame sequences stored for it.
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// for fast lookups to retrieve sequence data, we store the sequence information discretized into
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// a fixed # of frames. If this discretenesss is a visual problem, you can lerp the blend values to get it
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// perfect.
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#define SEQUENCE_SAMPLE_COUNT 1024
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#define MAX_SEQUENCES 64
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#define MAX_IMAGES_PER_FRAME_ON_DISK 4
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#define MAX_IMAGES_PER_FRAME_IN_MEMORY 2
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struct SequenceSampleTextureCoords_t
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{
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float m_fLeft_U0;
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float m_fTop_V0;
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float m_fRight_U0;
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float m_fBottom_V0;
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float m_fLeft_U1;
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float m_fTop_V1;
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float m_fRight_U1;
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float m_fBottom_V1;
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};
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struct SheetSequenceSample_t
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{
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// coordinates of two rectangles (old and next frame coords)
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SequenceSampleTextureCoords_t m_TextureCoordData[MAX_IMAGES_PER_FRAME_IN_MEMORY];
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float m_fBlendFactor;
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void CopyFirstFrameToOthers(void)
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{
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// for old format files only supporting one image per frame
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for(int i=1; i < MAX_IMAGES_PER_FRAME_IN_MEMORY; i++)
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{
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m_TextureCoordData[i] = m_TextureCoordData[0];
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}
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}
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};
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class CSheet
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{
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public:
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// read form a .sht file. This is the usual thing to do
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CSheet( CUtlBuffer &buf );
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CSheet( void );
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~CSheet( void );
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// references for smart ptrs
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CUtlReferenceList<CSheet> m_References;
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SheetSequenceSample_t *m_pSamples[MAX_SEQUENCES];
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bool m_bClamp[MAX_SEQUENCES];
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bool m_bSequenceIsCopyOfAnotherSequence[MAX_SEQUENCES];
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int m_nNumFrames[MAX_SEQUENCES];
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float m_flFrameSpan[MAX_SEQUENCES];
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};
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#endif // PSHEET_H
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