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/* bzflag
* Copyright (c) 1993 - 2008 Tim Riker
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the license found in the file
* named COPYING that should have accompanied this file.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef _TRANSFORM_H_
#define _TRANSFORM_H_
#include <string>
#include <vector>
#include <iostream>
enum TransformType {
ShiftTransform = 0,
ScaleTransform = 1,
ShearTransform = 2,
SpinTransform = 3,
IndexTransform = 4,
LastTransform
};
typedef struct {
TransformType type;
int index;
float data[4];
} TransformData;
class MeshTransform {
public:
MeshTransform();
~MeshTransform();
MeshTransform& operator=(const MeshTransform& transform);
void append(const MeshTransform& transform);
void prepend(const MeshTransform& transform);
bool setName(const std::string& name);
void addShift(const float shift[3]);
void addScale(const float scale[3]);
void addShear(const float shear[3]);
void addSpin(const float degrees, const float normal[3]);
void addReference(int transform);
bool isEmpty() const { return (transforms.size() <= 0); }
bool isValid();
void finalize();
const std::string& getName() const;
int packSize() const;
void* pack(void*) const;
void* unpack(void*);
void print(std::ostream& out, const std::string& indent) const;
void printTransforms(std::ostream& out, const std::string& indent) const;
private:
std::string name;
std::vector<TransformData> transforms;
public:
class Tool {
public:
Tool(const MeshTransform& transform);
~Tool();
bool isInverted() const;
bool isSkewed() const; // scaled or sheared
void modifyVertex(float vertex[3]) const;
void modifyNormal(float normal[3]) const;
void modifyOldStyle(float pos[3], float size[3],
float& angle, bool& flipz) const;
const float* getMatrix() const;
private:
void processTransforms(const std::vector<TransformData>& transforms);
bool empty;
bool inverted;
bool skewed;
float vertexMatrix[4][4];
float normalMatrix[3][3];
};
friend class MeshTransform::Tool;
};
inline bool MeshTransform::Tool::isInverted() const
{
return inverted;
}
inline bool MeshTransform::Tool::isSkewed() const
{
return skewed;
}
inline const float* MeshTransform::Tool::getMatrix() const
{
return (const float*)vertexMatrix;
}
class MeshTransformManager {
public:
MeshTransformManager();
~MeshTransformManager();
void update();
void clear();
int addTransform(MeshTransform* driver);
int findTransform(const std::string& name) const;
const MeshTransform* getTransform(int id) const;
int packSize() const;
void* pack(void*) const;
void* unpack(void*);
void print(std::ostream& out, const std::string& indent) const;
private:
std::vector<MeshTransform*> transforms;
};
inline const MeshTransform* MeshTransformManager::getTransform(int id) const
{
if ((id >= 0) && (id < (int)transforms.size())) {
return transforms[id];
} else {
return NULL;
}
}
extern MeshTransformManager TRANSFORMMGR;
#endif //_TRANSFORM_H_
// Local Variables: ***
// mode:C++ ***
// tab-width: 8 ***
// c-basic-offset: 2 ***
// indent-tabs-mode: t ***
// End: ***
// ex: shiftwidth=2 tabstop=8
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