mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-29 01:23:04 +00:00
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
|
//========= Copyright Valve Corporation, All rights reserved. ============//
|
||
|
|
//
|
||
|
|
// Purpose: A little helper class that computes a spline patch
|
||
|
|
//
|
||
|
|
// $Workfile: $
|
||
|
|
// $Date: $
|
||
|
|
//
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// $Log: $
|
||
|
|
//
|
||
|
|
// $NoKeywords: $
|
||
|
|
//=============================================================================//
|
||
|
|
|
||
|
|
#ifndef SPLINEPATCH_H
|
||
|
|
#define SPLINEPATCH_H
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "mathlib/vector4d.h"
|
||
|
|
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
// Spline patch:
|
||
|
|
//-----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
class CSplinePatch
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
// The last argument represents the number of float channels in addition to position
|
||
|
|
CSplinePatch( );
|
||
|
|
~CSplinePatch();
|
||
|
|
|
||
|
|
// Call this to initialize the patch
|
||
|
|
void Init( int w, int h, int extraChannels );
|
||
|
|
|
||
|
|
// 0 = linear, 1 = spliney!
|
||
|
|
void SetLinearBlend( float factor );
|
||
|
|
|
||
|
|
// Hooks the patch up to externally controlled data...
|
||
|
|
void SetControlPositions( Vector const** pPositions );
|
||
|
|
void SetChannelData( int channel, float* pChannel );
|
||
|
|
|
||
|
|
// This interface isn't wonderful; it's limited by optimization issues...
|
||
|
|
|
||
|
|
// Call this before querying the patch for data at (i,j)
|
||
|
|
void SetupPatchQuery( float i, float j );
|
||
|
|
|
||
|
|
// Gets the point and normal at (i,j) specified above
|
||
|
|
void GetPointAndNormal( Vector& position, Vector& normal ) const;
|
||
|
|
|
||
|
|
// Gets at other channels
|
||
|
|
float GetChannel( int channel ) const;
|
||
|
|
|
||
|
|
// Gets at the dimensions
|
||
|
|
int Width() const { return m_Width; }
|
||
|
|
int Height() const { return m_Height; }
|
||
|
|
|
||
|
|
public:
|
||
|
|
// The integer + float values for the patch query
|
||
|
|
int m_is, m_it;
|
||
|
|
float m_fs, m_ft;
|
||
|
|
|
||
|
|
private:
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
MAX_CHANNELS = 4
|
||
|
|
};
|
||
|
|
|
||
|
|
// no copy constructor
|
||
|
|
CSplinePatch( const CSplinePatch& );
|
||
|
|
|
||
|
|
// Computes indices of the samples to read for this interpolation
|
||
|
|
void ComputeIndices( );
|
||
|
|
|
||
|
|
// input data
|
||
|
|
int m_Width;
|
||
|
|
int m_Height;
|
||
|
|
int m_ChannelCount;
|
||
|
|
Vector const** m_ppPositions;
|
||
|
|
float const* m_pChannel[MAX_CHANNELS];
|
||
|
|
|
||
|
|
// temporary data used for a single patch query
|
||
|
|
int m_SampleIndices[4][4];
|
||
|
|
Vector4D m_SVec;
|
||
|
|
Vector4D m_TVec;
|
||
|
|
|
||
|
|
float m_LinearFactor;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // SPLINEPATCH_H
|