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Diffstat (limited to 'Build/source/utils/asymptote/arcball.cc')
-rw-r--r-- | Build/source/utils/asymptote/arcball.cc | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/Build/source/utils/asymptote/arcball.cc b/Build/source/utils/asymptote/arcball.cc deleted file mode 100644 index 358195597ae..00000000000 --- a/Build/source/utils/asymptote/arcball.cc +++ /dev/null @@ -1,237 +0,0 @@ -/********************************************************************** - - arcball.cc - - - -------------------------------------------------- - - GLUI User Interface Toolkit (LGPL) - Copyright (c) 1998 Paul Rademacher - Feb 1998, Paul Rademacher (rademach@cs.unc.edu) - Oct 2003, Nigel Stewart - GLUI Code Cleaning - - WWW: http://sourceforge.net/projects/glui/ - Forums: http://sourceforge.net/forum/?group_id=92496 - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library 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. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - -**********************************************************************/ - -#include "arcball.h" - -#include <cstdio> - - -/**************************************** Arcball::Arcball() ****/ -/* Default (void) constructor for Arcball */ - -Arcball::Arcball() -{ - rot_ptr = &rot; - init(); -} - -/**************************************** Arcball::Arcball() ****/ -/* Takes as argument a mat4 to use instead of the internal rot */ - -Arcball::Arcball(mat4 *mtx) -{ - rot_ptr = mtx; -} - - -/**************************************** Arcball::Arcball() ****/ -/* A constructor that accepts the screen center and arcball radius*/ - -Arcball::Arcball(const vec2 &_center, float _radius) -{ - rot_ptr = &rot; - init(); - set_params(_center, _radius); -} - - -/************************************** Arcball::set_params() ****/ - -void Arcball::set_params(const vec2 &_center, float _radius) -{ - center = _center; - radius = _radius; -} - -/*************************************** Arcball::init() **********/ - -void Arcball::init() -{ - center.set( 0.0, 0.0 ); - radius = 1.0; - q_now = quat_identity(); - *rot_ptr = identity3D(); - q_increment = quat_identity(); - rot_increment = identity3D(); - is_mouse_down = false; - is_spinning = false; - damp_factor = 0.0; - zero_increment = true; -} - -/*********************************** Arcball::mouse_to_sphere() ****/ - -vec3 Arcball::mouse_to_sphere(const vec2 &p) -{ - float mag; - vec2 v2 = (p - center) / radius; - vec3 v3( v2[0], v2[1], 0.0 ); - - mag = v2*v2; - - if ( mag > 1.0 ) - v3.normalize(); - else - v3[VZ] = (float) sqrt( 1.0 - mag ); - - /* Now we add constraints - X takes precedence over Y */ - if ( constraint_x ) - { - v3 = constrain_vector( v3, vec3( 1.0, 0.0, 0.0 )); - } - else if ( constraint_y ) - { - v3 = constrain_vector( v3, vec3( 0.0, 1.0, 0.0 )); - } - - return v3; -} - - -/************************************ Arcball::constrain_vector() ****/ - -vec3 Arcball::constrain_vector(const vec3 &vector, const vec3 &axis) -{ - return (vector-(vector*axis)*axis).normalize(); -} - -/************************************ Arcball::mouse_down() **********/ - -void Arcball::mouse_down(int x, int y) -{ - down_pt.set( (float)x, (float) y ); - is_mouse_down = true; - - q_increment = quat_identity(); - rot_increment = identity3D(); - zero_increment = true; -} - - -/************************************ Arcball::mouse_up() **********/ - -void Arcball::mouse_up() -{ - q_now = q_drag * q_now; - is_mouse_down = false; -} - - -/********************************** Arcball::mouse_motion() **********/ - -void Arcball::mouse_motion(int x, int y, int shift, int ctrl, int alt) -{ - /* Set the X constraint if CONTROL key is pressed, Y if ALT key */ - set_constraints( ctrl != 0, alt != 0 ); - - vec2 new_pt( (float)x, (float) y ); - vec3 v0 = mouse_to_sphere( down_pt ); - vec3 v1 = mouse_to_sphere( new_pt ); - - vec3 cross = v0^v1; - - q_drag.set( cross, v0 * v1 ); - - // *rot_ptr = (q_drag * q_now).to_mat4(); - mat4 temp = q_drag.to_mat4(); - *rot_ptr = *rot_ptr * temp; - - down_pt = new_pt; - - /* We keep a copy of the current incremental rotation (= q_drag) */ - q_increment = q_drag; - rot_increment = q_increment.to_mat4(); - - set_constraints(false, false); - - if ( q_increment.s < .999999 ) - { - is_spinning = true; - zero_increment = false; - } - else - { - is_spinning = false; - zero_increment = true; - } -} - - -/********************************** Arcball::mouse_motion() **********/ - -void Arcball::mouse_motion(int x, int y) -{ - mouse_motion(x, y, 0, 0, 0); -} - - -/***************************** Arcball::set_constraints() **********/ - -void Arcball::set_constraints(bool _constraint_x, bool _constraint_y) -{ - constraint_x = _constraint_x; - constraint_y = _constraint_y; -} - -/***************************** Arcball::idle() *********************/ - -void Arcball::idle() -{ - if (is_mouse_down) - { - is_spinning = false; - zero_increment = true; - } - - if (damp_factor < 1.0f) - q_increment.scale_angle(1.0f - damp_factor); - - rot_increment = q_increment.to_mat4(); - - if (q_increment.s >= .999999f) - { - is_spinning = false; - zero_increment = true; - } -} - - -/************************ Arcball::set_damping() *********************/ - -void Arcball::set_damping(float d) -{ - damp_factor = d; -} - - - - - |