arcball.c File Reference

#include <glcomp/glcompdefs.h>
#include "smyrnadefs.h"
#include "arcball.h"

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Macros
#define	ARCBALL_C

Functions
static void	setBounds (ArcBall_t *a, float NewWidth, float NewHeight)
static void	mapToSphere (ArcBall_t *a, const Point2fT *NewPt, Vector3fT *NewVec)
void	init_arcBall (ArcBall_t *a, float NewWidth, float NewHeight)
static void	click (ArcBall_t *a, const Point2fT *NewPt)
static void	drag (ArcBall_t *a, const Point2fT *NewPt, Quat4fT *NewRot)
void	arcmouseClick (void)
void	arcmouseDrag (void)

Variables
static Matrix4fT	Transform
static Matrix3fT	LastRot
static Matrix3fT	ThisRot

Macro Definition Documentation

ARCBALL_C

#define ARCBALL_C

Copyright (c) 1999-2009 Tatewake.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Definition at line 26 of file arcball.c.

Function Documentation

arcmouseClick()

void arcmouseClick

(

void

)

Definition at line 142 of file arcball.c.

References _ViewInfo::arcball, click(), _ArcBall_t::isDragging, _ArcBall_t::LastRot, _ArcBall_t::MousePt, _ArcBall_t::ThisRot, and view.

Referenced by apply_actions().

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arcmouseDrag()

void arcmouseDrag

(

void

)

Definition at line 150 of file arcball.c.

References _ViewInfo::arcball, drag(), _ArcBall_t::LastRot, _ArcBall_t::MousePt, Quat4fT, _ArcBall_t::ThisRot, _ArcBall_t::Transform, and view.

Referenced by apply_actions().

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click()

static void click ( ArcBall_t *  a, const Point2fT *  NewPt  )

static

Definition at line 106 of file arcball.c.

References mapToSphere(), and _ArcBall_t::StVec.

Referenced by arcmouseClick().

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drag()

static void drag ( ArcBall_t *  a, const Point2fT *  NewPt, Quat4fT *  NewRot  )

static

Definition at line 113 of file arcball.c.

References _ArcBall_t::EnVec, Epsilon, mapToSphere(), _ArcBall_t::StVec, and Vector3fT.

Referenced by arcmouseDrag().

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init_arcBall()

void init_arcBall	(	ArcBall_t *	a,
		float	NewWidth,
		float	NewHeight
	)

Definition at line 88 of file arcball.c.

References _ArcBall_t::EnVec, _ArcBall_t::isClicked, _ArcBall_t::isDragging, _ArcBall_t::isRClicked, LastRot, _ArcBall_t::LastRot, setBounds(), _ArcBall_t::StVec, ThisRot, _ArcBall_t::ThisRot, Transform, and _ArcBall_t::Transform.

Referenced by cb_reshape(), and configure_event().

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mapToSphere()

static void mapToSphere ( ArcBall_t *  a, const Point2fT *  NewPt, Vector3fT *  NewVec  )

static

Definition at line 37 of file arcball.c.

References _ArcBall_t::AdjustHeight, _ArcBall_t::AdjustWidth, FuncSqrt, norm(), and Point2fT.

Referenced by click(), and drag().

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setBounds()

static void setBounds ( ArcBall_t *  a, float  NewWidth, float  NewHeight  )

static

Definition at line 30 of file arcball.c.

References _ArcBall_t::AdjustHeight, and _ArcBall_t::AdjustWidth.

Referenced by init_arcBall().

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Variable Documentation

LastRot

Matrix3fT LastRot

static

Initial value:

= { {1.0f, 0.0f, 0.0f,  
                              0.0f, 1.0f, 0.0f,
                              0.0f, 0.0f, 1.0f}
}

Definition at line 77 of file arcball.c.

Referenced by init_arcBall().

ThisRot

Matrix3fT ThisRot

static

Initial value:

= { {1.0f, 0.0f, 0.0f,  
                              0.0f, 1.0f, 0.0f,
                              0.0f, 0.0f, 1.0f}
}

Definition at line 82 of file arcball.c.

Referenced by init_arcBall().

Transform

Matrix4fT Transform

static

Initial value:

= { {1.0f, 0.0f, 0.0f, 0.0f,    
                                0.0f, 1.0f, 0.0f, 0.0f,
                                0.0f, 0.0f, 1.0f, 0.0f,
                                0.0f, 0.0f, 0.0f, 1.0f}
}

Definition at line 71 of file arcball.c.

Referenced by init_arcBall().