fix: some file didn't have the svn:eol-style native yet
This commit is contained in:
erwin.coumans
@@ -1,237 +1,237 @@
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/**********************************************************************
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arcball.cpp
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--------------------------------------------------
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GLUI User Interface Toolkit (LGPL)
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Copyright (c) 1998 Paul Rademacher
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Feb 1998, Paul Rademacher (rademach@cs.unc.edu)
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Oct 2003, Nigel Stewart - GLUI Code Cleaning
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WWW: http://sourceforge.net/projects/glui/
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Forums: http://sourceforge.net/forum/?group_id=92496
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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**********************************************************************/
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#include "arcball.h"
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#include <cstdio>
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/**************************************** Arcball::Arcball() ****/
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/* Default (void) constructor for Arcball */
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Arcball::Arcball()
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{
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rot_ptr = &rot;
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init();
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}
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/**************************************** Arcball::Arcball() ****/
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/* Takes as argument a mat4 to use instead of the internal rot */
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Arcball::Arcball(mat4 *mtx)
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{
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rot_ptr = mtx;
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}
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/**************************************** Arcball::Arcball() ****/
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/* A constructor that accepts the screen center and arcball radius*/
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Arcball::Arcball(const vec2 &_center, float _radius)
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{
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rot_ptr = &rot;
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init();
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set_params(_center, _radius);
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}
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/************************************** Arcball::set_params() ****/
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void Arcball::set_params(const vec2 &_center, float _radius)
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{
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center = _center;
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radius = _radius;
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}
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/*************************************** Arcball::init() **********/
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void Arcball::init()
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{
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center.set( 0.0, 0.0 );
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radius = 1.0;
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q_now = quat_identity();
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*rot_ptr = identity3D();
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q_increment = quat_identity();
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rot_increment = identity3D();
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is_mouse_down = false;
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is_spinning = false;
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damp_factor = 0.0;
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zero_increment = true;
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}
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/*********************************** Arcball::mouse_to_sphere() ****/
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vec3 Arcball::mouse_to_sphere(const vec2 &p)
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{
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float mag;
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vec2 v2 = (p - center) / radius;
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vec3 v3( v2[0], v2[1], 0.0 );
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mag = v2*v2;
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if ( mag > 1.0 )
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v3.normalize();
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else
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v3[VZ] = (float) sqrt( 1.0 - mag );
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/* Now we add constraints - X takes precedence over Y */
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if ( constraint_x )
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{
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v3 = constrain_vector( v3, vec3( 1.0, 0.0, 0.0 ));
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}
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else if ( constraint_y )
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{
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v3 = constrain_vector( v3, vec3( 0.0, 1.0, 0.0 ));
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}
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return v3;
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}
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/************************************ Arcball::constrain_vector() ****/
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vec3 Arcball::constrain_vector(const vec3 &vector, const vec3 &axis)
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{
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return (vector-(vector*axis)*axis).normalize();
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}
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/************************************ Arcball::mouse_down() **********/
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void Arcball::mouse_down(int x, int y)
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{
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down_pt.set( (float)x, (float) y );
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is_mouse_down = true;
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q_increment = quat_identity();
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rot_increment = identity3D();
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zero_increment = true;
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}
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/************************************ Arcball::mouse_up() **********/
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void Arcball::mouse_up()
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{
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q_now = q_drag * q_now;
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is_mouse_down = false;
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}
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/********************************** Arcball::mouse_motion() **********/
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void Arcball::mouse_motion(int x, int y, int shift, int ctrl, int alt)
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{
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/* Set the X constraint if CONTROL key is pressed, Y if ALT key */
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set_constraints( ctrl != 0, alt != 0 );
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vec2 new_pt( (float)x, (float) y );
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vec3 v0 = mouse_to_sphere( down_pt );
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vec3 v1 = mouse_to_sphere( new_pt );
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vec3 cross = v0^v1;
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q_drag.set( cross, v0 * v1 );
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// *rot_ptr = (q_drag * q_now).to_mat4();
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mat4 temp = q_drag.to_mat4();
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*rot_ptr = *rot_ptr * temp;
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down_pt = new_pt;
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/* We keep a copy of the current incremental rotation (= q_drag) */
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q_increment = q_drag;
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rot_increment = q_increment.to_mat4();
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set_constraints(false, false);
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if ( q_increment.s < .999999 )
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{
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is_spinning = true;
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zero_increment = false;
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}
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else
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{
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is_spinning = false;
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zero_increment = true;
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}
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}
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/********************************** Arcball::mouse_motion() **********/
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void Arcball::mouse_motion(int x, int y)
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{
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mouse_motion(x, y, 0, 0, 0);
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}
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/***************************** Arcball::set_constraints() **********/
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void Arcball::set_constraints(bool _constraint_x, bool _constraint_y)
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{
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constraint_x = _constraint_x;
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constraint_y = _constraint_y;
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}
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/***************************** Arcball::idle() *********************/
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void Arcball::idle()
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{
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if (is_mouse_down)
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{
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is_spinning = false;
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zero_increment = true;
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}
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if (damp_factor < 1.0f)
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q_increment.scale_angle(1.0f - damp_factor);
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rot_increment = q_increment.to_mat4();
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if (q_increment.s >= .999999f)
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{
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is_spinning = false;
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zero_increment = true;
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}
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}
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/************************ Arcball::set_damping() *********************/
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void Arcball::set_damping(float d)
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{
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damp_factor = d;
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}
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/**********************************************************************
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arcball.cpp
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--------------------------------------------------
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GLUI User Interface Toolkit (LGPL)
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Copyright (c) 1998 Paul Rademacher
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Feb 1998, Paul Rademacher (rademach@cs.unc.edu)
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Oct 2003, Nigel Stewart - GLUI Code Cleaning
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WWW: http://sourceforge.net/projects/glui/
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Forums: http://sourceforge.net/forum/?group_id=92496
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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**********************************************************************/
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#include "arcball.h"
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#include <cstdio>
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/**************************************** Arcball::Arcball() ****/
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/* Default (void) constructor for Arcball */
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Arcball::Arcball()
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{
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rot_ptr = &rot;
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init();
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}
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/**************************************** Arcball::Arcball() ****/
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/* Takes as argument a mat4 to use instead of the internal rot */
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Arcball::Arcball(mat4 *mtx)
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{
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rot_ptr = mtx;
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}
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/**************************************** Arcball::Arcball() ****/
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/* A constructor that accepts the screen center and arcball radius*/
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Arcball::Arcball(const vec2 &_center, float _radius)
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{
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rot_ptr = &rot;
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init();
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set_params(_center, _radius);
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}
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/************************************** Arcball::set_params() ****/
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void Arcball::set_params(const vec2 &_center, float _radius)
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{
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center = _center;
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radius = _radius;
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}
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/*************************************** Arcball::init() **********/
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void Arcball::init()
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{
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center.set( 0.0, 0.0 );
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radius = 1.0;
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q_now = quat_identity();
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*rot_ptr = identity3D();
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q_increment = quat_identity();
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rot_increment = identity3D();
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is_mouse_down = false;
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is_spinning = false;
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damp_factor = 0.0;
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zero_increment = true;
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}
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/*********************************** Arcball::mouse_to_sphere() ****/
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vec3 Arcball::mouse_to_sphere(const vec2 &p)
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{
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float mag;
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vec2 v2 = (p - center) / radius;
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vec3 v3( v2[0], v2[1], 0.0 );
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mag = v2*v2;
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if ( mag > 1.0 )
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v3.normalize();
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else
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v3[VZ] = (float) sqrt( 1.0 - mag );
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/* Now we add constraints - X takes precedence over Y */
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if ( constraint_x )
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{
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v3 = constrain_vector( v3, vec3( 1.0, 0.0, 0.0 ));
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}
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else if ( constraint_y )
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{
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v3 = constrain_vector( v3, vec3( 0.0, 1.0, 0.0 ));
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}
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return v3;
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}
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/************************************ Arcball::constrain_vector() ****/
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vec3 Arcball::constrain_vector(const vec3 &vector, const vec3 &axis)
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{
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return (vector-(vector*axis)*axis).normalize();
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}
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/************************************ Arcball::mouse_down() **********/
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void Arcball::mouse_down(int x, int y)
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{
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down_pt.set( (float)x, (float) y );
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is_mouse_down = true;
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q_increment = quat_identity();
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rot_increment = identity3D();
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zero_increment = true;
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}
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/************************************ Arcball::mouse_up() **********/
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void Arcball::mouse_up()
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{
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q_now = q_drag * q_now;
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is_mouse_down = false;
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}
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/********************************** Arcball::mouse_motion() **********/
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void Arcball::mouse_motion(int x, int y, int shift, int ctrl, int alt)
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{
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/* Set the X constraint if CONTROL key is pressed, Y if ALT key */
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set_constraints( ctrl != 0, alt != 0 );
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vec2 new_pt( (float)x, (float) y );
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vec3 v0 = mouse_to_sphere( down_pt );
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vec3 v1 = mouse_to_sphere( new_pt );
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vec3 cross = v0^v1;
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q_drag.set( cross, v0 * v1 );
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// *rot_ptr = (q_drag * q_now).to_mat4();
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mat4 temp = q_drag.to_mat4();
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*rot_ptr = *rot_ptr * temp;
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down_pt = new_pt;
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/* We keep a copy of the current incremental rotation (= q_drag) */
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q_increment = q_drag;
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rot_increment = q_increment.to_mat4();
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set_constraints(false, false);
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if ( q_increment.s < .999999 )
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{
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is_spinning = true;
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zero_increment = false;
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}
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else
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{
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is_spinning = false;
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zero_increment = true;
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}
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}
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/********************************** Arcball::mouse_motion() **********/
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void Arcball::mouse_motion(int x, int y)
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{
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mouse_motion(x, y, 0, 0, 0);
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}
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/***************************** Arcball::set_constraints() **********/
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void Arcball::set_constraints(bool _constraint_x, bool _constraint_y)
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{
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constraint_x = _constraint_x;
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constraint_y = _constraint_y;
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}
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/***************************** Arcball::idle() *********************/
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void Arcball::idle()
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{
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if (is_mouse_down)
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{
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is_spinning = false;
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zero_increment = true;
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}
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if (damp_factor < 1.0f)
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q_increment.scale_angle(1.0f - damp_factor);
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rot_increment = q_increment.to_mat4();
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if (q_increment.s >= .999999f)
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{
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is_spinning = false;
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zero_increment = true;
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}
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}
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/************************ Arcball::set_damping() *********************/
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void Arcball::set_damping(float d)
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{
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damp_factor = d;
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}
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