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/usr/src/castle-game-engine-6.4/library/castleengine.h is in castle-game-engine-src 6.4+dfsg1-2.

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/*
  Copyright 2013 Jan Adamec, Michalis Kamburelis.

  This file is part of "Castle Game Engine".

  "Castle Game Engine" is free software; see the file COPYING.txt,
  included in this distribution, for details about the copyright.

  "Castle Game Engine" is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  ----------------------------------------------------------------------------

  This include file should be used in C/C++ projects. It contains all
  functions exported from the library.

  Dynamic library: add castlelib_c_loader.cpp file to your project and call
      CGE_LoadLibrary first to enable to Castle Game Engine funtions.

  iOS: castlelib will be statically linked to your app, so just include
      this file and you are ready to go.
*/


#ifndef CGE_LIBRARY_INCLUDED
#define CGE_LIBRARY_INCLUDED

#ifdef __GNUC__
#  ifdef __i386
#    define CDECL __attribute__ ((__cdecl__))
#  else
// On other platforms (like x86_64), cdecl is ignored
// https://mail.python.org/pipermail/expat-bugs/2004-January/001792.html
// https://groups.google.com/forum/#!topic/comp.os.linux.development.apps/7Dd7ge9OgKI
#    define CDECL
#  endif
#else
#  ifndef CDECL
#    define CDECL __cdecl
#  endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

enum ECgeOpenFlag
{
    ecgeofSaveMemory = 1,   // memory vs rendering quality (# of triangles)
    ecgeofLog        = 2,   // enable logging to stderr
};

enum ECgeVariable   // used for querying engine parameters in CGE_Set/GetVariable
{
    ecgevarWalkHeadBobbing = 0,   // walking effect (int, 1 = on, 0 = off)
    ecgevarEffectSSAO      = 1,   // screen space ambient occlusion (int, 1 or 0)
    ecgevarMouseLook       = 2,   // activate mouse look viewing mode, desktop interface only (int, 1 or 0)
    ecgevarCrossHair       = 3,   // show crosshair in the center of the screen (int, 1 or 0)
    ecgevarAnimationRunning = 4,  // (read-only) engine would like to progress with the animation (int, 1 or 0)
    ecgevarWalkTouchCtl    = 5,   // walking touch control (int, one of ECgeTouchCtlInterface values)
    ecgevarScenePaused     = 6,   // pause SceneManager (int, 1 = on, 0 = off)
    ecgevarAutoRedisplay   = 7,   // automatically redraws the window all the time (int, 1 = on, 0 = off)
    ecgevarHeadlight       = 8,   // avatar's headlight (int, 1 = on, 0 = off)
    ecgevarOcclusionQuery  = 9,   // occlusion query, ignored when hierarchical on (int, 1 = on, 0 = off)
};

enum ECgeNavigationType
{
    ecgenavWalk      = 0,
    ecgenavFly       = 1,
    ecgenavExamine   = 2,
    ecgenavTurntable = 3,
    ecgenavNone      = 4,
};

enum ECgeTouchCtlInterface
{
    ecgetciNone              = 0,
    ecgetciCtlWalkCtlRotate  = 1,
    ecgetciCtlWalkDragRotate = 2,
    etciCtlFlyCtlWalkDragRotate = 3,
    etciCtlPanXYDragRotate   = 4,
};

enum ECgeMouseCursor
{
    ecgecursorDefault   = 0,
    ecgecursorWait      = 1,
    ecgecursorHand      = 2,
    ecgecursorText      = 3,
    ecgecursorNone      = 4,
};

enum ECgeLibCallbackCode
{
    ecgelibNeedsDisplay          = 0,  // app should repaint the view (content changed)
    ecgelibSetMouseCursor        = 1,  // sends ECgeMouseCursor in iParam1
    ecgelibNavigationTypeChanged = 2,  // sends ECgeNavigationType in iParam1
    ecgelibSetMousePosition      = 3,  // sends x in iParam1 and y in iParam2
    ecgelibWarning               = 4,  // sends message in szParam
};

enum ECgeKey    // values for these constants have to be same as in unit CastleKeysMouse (TKey)
{
  kcge_None        = 0,
  kcge_PrintScreen = 1,
  kcge_CapsLock    = 2,
  kcge_ScrollLock  = 3,
  kcge_NumLock     = 4,
  kcge_Pause       = 5,
  kcge_Apostrophe  = 6,
  kcge_Semicolon   = 7,
  kcge_BackSpace   = 8,
  kcge_Tab         = 9,
  kcge_Slash       = 10,
  kcge_BackQuote   = 11,
  kcge_Minus       = 12,
  kcge_Enter       = 13,
  kcge_Equal       = 14,
  kcge_BackSlash   = 15,
  kcge_Shift       = 16,
  kcge_Ctrl        = 17,
  kcge_Alt         = 18,
  kcge_Plus        = 19,
  kcge_Escape      = 27,
  kcge_Space       = 32,
  kcge_PageUp      = 33,
  kcge_PageDown    = 34,
  kcge_End         = 35,
  kcge_Home        = 36,
  kcge_Left        = 37,
  kcge_Up          = 38,
  kcge_Right       = 39,
  kcge_Down        = 40,
  kcge_Insert      = 45,
  kcge_Delete      = 46,
  kcge_0           = 48,
  kcge_1           = 49,
  kcge_2           = 50,
  kcge_3           = 51,
  kcge_4           = 52,
  kcge_5           = 53,
  kcge_6           = 54,
  kcge_7           = 55,
  kcge_8           = 56,
  kcge_9           = 57,
  kcge_A           = 65,
  kcge_B           = 66,
  kcge_C           = 67,
  kcge_D           = 68,
  kcge_E           = 69,
  kcge_F           = 70,
  kcge_G           = 71,
  kcge_H           = 72,
  kcge_I           = 73,
  kcge_J           = 74,
  kcge_K           = 75,
  kcge_L           = 76,
  kcge_M           = 77,
  kcge_N           = 78,
  kcge_O           = 79,
  kcge_P           = 80,
  kcge_Q           = 81,
  kcge_R           = 82,
  kcge_S           = 83,
  kcge_T           = 84,
  kcge_U           = 85,
  kcge_V           = 86,
  kcge_W           = 87,
  kcge_X           = 88,
  kcge_Y           = 89,
  kcge_Z           = 90,
  kcge_LeftBracket = 91,
  kcge_RightBracket = 92,
  kcge_Numpad_Plus = 107,
  kcge_Numpad_Minus = 109,
  kcge_F1          = 112,
  kcge_F2          = 113,
  kcge_F3          = 114,
  kcge_F4          = 115,
  kcge_F5          = 116,
  kcge_F6          = 117,
  kcge_F7          = 118,
  kcge_F8          = 119,
  kcge_F9          = 120,
  kcge_F10         = 121,
  kcge_F11         = 122,
  kcge_F12         = 123,
  kcge_Numpad_0    = 140,
  kcge_Numpad_1    = 141,
  kcge_Numpad_2    = 142,
  kcge_Numpad_3    = 143,
  kcge_Numpad_4    = 144,
  kcge_Numpad_5    = 145,
  kcge_Numpad_6    = 146,
  kcge_Numpad_7    = 147,
  kcge_Numpad_8    = 148,
  kcge_Numpad_9    = 149,
  kcge_Numpad_End  = 150,
  kcge_Numpad_Down = 151,
  kcge_Numpad_PageDown = 152,
  kcge_Numpad_Left     = 153,
  kcge_Numpad_Begin    = 154,
  kcge_Numpad_Right    = 155,
  kcge_Numpad_Home     = 156,
  kcge_Numpad_Up       = 157,
  kcge_Numpad_PageUp   = 158,
  kcge_Numpad_Insert   = 159,
  kcge_Numpad_Delete   = 160,
  kcge_Numpad_Enter    = 161,
  kcge_Numpad_Multiply = 162,
  kcge_Numpad_Divide   = 163,
  kcge_Comma       = 188,
  kcge_Period      = 190,
};

typedef int (CDECL *TCgeLibraryCallback)(int /*ECgeLibCallbackCode*/eCode, int iParam1, int iParam2, const char *szParam);


//-----------------------------------------------------------------------------
extern void CGE_LoadLibrary(void);	// function defined in the loader CPP file

//-----------------------------------------------------------------------------
extern void CGE_Open(unsigned uiFlags, unsigned initialWidth, unsigned initialHeight, unsigned uiDpi, const char *applicationConfigDirectory);     // init the library, this function must be called first (required). Flags is any combination of ECgeOpenFlag
extern void CGE_Close(void);
extern void CGE_GetOpenGLInformation(char *szBuffer, int nBufSize);        // szBuffer is filled inside the function with max size of nBufSize
extern void CGE_SetUserInterface(bool bAutomaticTouchInterface); // should be called at the start of the program. Touch interface controls will be updated automatically then.

extern void CGE_Resize(unsigned uiViewWidth, unsigned uiViewHeight);       // let the library know about the viewport size changes
extern void CGE_Render(void);                                                  // paints the 3d scene into the context
extern void CGE_SaveScreenshotToFile(const char *szFile);
extern void CGE_SetLibraryCallbackProc(TCgeLibraryCallback pProc);     // set callback function
extern void CGE_Update(void);                                                  // let the 3d engine perform the animations, etc

extern void CGE_MouseDown(int x, int y, bool bLeftBtn, int nFingerIdx);    // [0,0] is the bottom-left corner!
extern void CGE_Motion(int x, int y, int nFingerIdx);
extern void CGE_MouseUp(int x, int y, bool bLeftBtn, int nFingerIdx, bool trackReleased);
extern void CGE_MouseWheel(float zDelta, bool bVertical);

extern void CGE_KeyDown(int /*ECgeKey*/ eKey);
extern void CGE_KeyUp(int /*ECgeKey*/ eKey);

extern void CGE_LoadSceneFromFile(const char *szFile);                     // name od the file has to be utf-8 encoded

extern int CGE_GetViewpointsCount(void);
extern void CGE_GetViewpointName(int iViewpointIdx, char *szName, int nBufSize);    // szName is buffer of size nBufSize, and is filled with utf-8 encoded string
extern void CGE_MoveToViewpoint(int iViewpointIdx, bool bAnimated);
extern void CGE_AddViewpointFromCurrentView(const char *szName);

extern void CGE_GetBoundingBox(float *pfXMin, float *pfXMax, float *pfYMin, float *pfYMax, float *pfZMin, float *pfZMax);
extern void CGE_GetViewCoords(float *pfPosX, float *pfPosY, float *pfPosZ, float *pfDirX, float *pfDirY, float *pfDirZ,
                              float *pfUpX, float *pfUpY, float *pfUpZ, float *pfGravX, float *pfGravY, float *pfGravZ);
extern void CGE_MoveViewToCoords(float fPosX, float fPosY, float fPosZ, float fDirX, float fDirY, float fDirZ,
                                 float fUpX, float fUpY, float fUpZ, float fGravX, float fGravY, float fGravZ, bool bAnimated);

extern int CGE_GetNavigationType(void);
extern void CGE_SetNavigationType(int /*ECgeNavigationType*/ eNewType);

extern void CGE_SetTouchInterface(int /*ECgeTouchCtlInterface*/ eMode);

extern void CGE_SetVariableInt(int /*ECgeVariable*/ eVar, int nValue);
extern int CGE_GetVariableInt(int /*ECgeVariable*/ eVar);

extern void CGE_SetNodeFieldValue(const char *szNodeName, const char *szFieldName,
                                  float fVal1, float fVal2, float fVal3, float fVal4);

extern void CGE_IncreaseSceneTime(float fTimeS);    // set time in the scene, useful when sceneManager paused

#ifdef __cplusplus
}
#endif

#endif //CGE_LIBRARY_INCLUDED