/*
* Ok, simulate a track-ball. Project the points onto the virtual
* trackball, then figure out the axis of rotation, which is the cross
* product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
* Note: This is a deformed trackball-- is a trackball in the center,
* but is deformed into a hyperbolic sheet of rotation away from the
* center. This particular function was chosen after trying out
* several variations.
*
* It is assumed that the arguments to this routine are in the range
* (-1.0 ... 1.0)
*/
void
trackball(float q[4], float p1x, float p1y, float p2x, float p2y)
{
float a[3]; /* Axis of rotation */
float phi; /* how much to rotate about axis */
float p1[3], p2[3], d[3];
float t;
if (p1x == p2x && p1y == p2y) {
/* Zero rotation */
vzero(q);
q[3] = 1.0;
return;
}
/*
* First, figure out z-coordinates for projection of P1 and P2 to
* deformed sphere
*/
vset(p1, p1x, p1y, tb_project_to_sphere(TRACKBALLSIZE, p1x, p1y));
vset(p2, p2x, p2y, tb_project_to_sphere(TRACKBALLSIZE, p2x, p2y));
/*
* Now, we want the cross product of P1 and P2
*/
vcross(p2,p1,a);
/*
* Figure out how much to rotate around that axis.
*/
vsub(p1, p2, d);
t = vlength(d) / (2.0f*TRACKBALLSIZE);
/*
* Avoid problems with out-of-control values...
*/
if (t > 1.0) t = 1.0;
if (t < -1.0) t = -1.0;
phi = 2.0f * (float) asin(t);
axis_to_quat(a,phi,q);
}
/*
* Ok, simulate a track-ball. Project the points onto the virtual
* trackball, then figure out the axis of rotation, which is the cross
* product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
* Note: This is a deformed trackball-- is a trackball in the center,
* but is deformed into a hyperbolic sheet of rotation away from the
* center. This particular function was chosen after trying out
* several variations.
*
* It is assumed that the arguments to this routine are in the range
* (-1.0 ... 1.0)
*/
quat & trackball(quat& q, vec2& pt1, vec2& pt2, nv_scalar trackballsize)
{
vec3 a; // Axis of rotation
nv_scalar phi; // how much to rotate about axis
vec3 d;
nv_scalar t;
if (pt1.x == pt2.x && pt1.y == pt2.y)
{
// Zero rotation
q = quat_id;
return q;
}
// First, figure out z-coordinates for projection of P1 and P2 to
// deformed sphere
vec3 p1(pt1.x,pt1.y,tb_project_to_sphere(trackballsize,pt1.x,pt1.y));
vec3 p2(pt2.x,pt2.y,tb_project_to_sphere(trackballsize,pt2.x,pt2.y));
// Now, we want the cross product of P1 and P2
cross(a,p1,p2);
// Figure out how much to rotate around that axis.
d.x = p1.x - p2.x;
d.y = p1.y - p2.y;
d.z = p1.z - p2.z;
t = _sqrt(d.x * d.x + d.y * d.y + d.z * d.z) / (trackballsize);
// Avoid problems with out-of-control values...
if (t > nv_one)
t = nv_one;
if (t < -nv_one)
t = -nv_one;
phi = nv_two * nv_scalar(asin(t));
axis_to_quat(q,a,phi);
return q;
}
void rotate(int by, float axis[3][3], int phi) {
GLfloat m[4][4];
float q[4] = {0};
int i;
for (i=0; i<4; i++) {
q[i] = 0;
}
axis_to_quat(axis[by],RAD(phi), q);
build_rotmatrix(m, q);
for (i=0; i<3; i++) {
if (i != by) {
multiply(m, axis[i], axis[i]);
}
}
for (i=0; i<NV; i++) {
multiply(m, vertexes[i], vertexes[i]);
}
for (i=0; i<4; i++) {
multiply(m, originalVertex[i], originalVertex[i]);
}
}
/* Ok, simulate a track-ball. Project the points onto the virtual
* trackball, then figure out the axis of rotation, which is the cross
* product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
* Note: This is a deformed trackball-- is a trackball in the center,
* but is deformed into a hyperbolic sheet of rotation away from the
* center. This particular function was chosen after trying out
* several variations.
*
* It is assumed that the arguments to this routine are in the range
* (-1.0 ... 1.0)
*/
void trackball(double q[4], double p1x, double p1y, double p2x, double p2y){
double axis[3]; /* Axis of rotation */
double phi; /* how much to rotate about axis */
double p1[3], p2[3], d[3];
double t;
/* if zero rotation */
if(p1x == p2x && p1y == p2y){
vset(q, 0.0, 0.0, 0.0);
q[3] = 1.0;
return;
}
/* First, figure out z-coordinates for projection of P1 and P2 to */
/* the deformed sphere */
p1[0] = p1x;
p1[1] = p1y;
p1[2] = tb_project_to_sphere(TRACKBALLSIZE, p1x, p1y);
p2[0] = p2x;
p2[1] = p2y;
p2[2] = tb_project_to_sphere(TRACKBALLSIZE, p2x, p2y);
/* Now, we want the cross product of P1 and P2 */
vcross(axis, p2, p1);
/* Figure out how much to rotate around that axis. */
vsub(d, p1, p2);
t = vlength(d)/(2.0*TRACKBALLSIZE);
/* Avoid problems with out-of-control values. */
if(t > 1.0){ t = 1.0; }
if(t < -1.0){ t = -1.0; }
phi = 2.0 * asin(t);
axis_to_quat(axis, phi, q);
}
/*
* Ok, simulate a track-ball. Project the points onto the virtual
* trackball, then figure out the axis of rotation, which is the cross
* product of P1 P2 and O P1 (O is the center of the ball, 0,0,0)
* Note: This is a deformed trackball-- is a trackball in the center,
* but is deformed into a hyperbolic sheet of rotation away from the
* center. This particular function was chosen after trying out
* several variations.
*
* It is assumed that the arguments to this routine are in the range
* (-1.0 ... 1.0)
*/
void trackball(float q[4], float p1x, float p1y, float p2x, float p2y, float tbSize)
{
float a[3]; // Axis of rotation
float phi; // how much to rotate about axis
float p1[3], p2[3], d[3];
float t;
if( p1x == p2x && p1y == p2y ) {
/* Zero rotation */
vzero(q);
q[3] = 1.0;
return;
}
// First, figure out z-coordinates for projection of P1 and P2 to deformed sphere
vset( p1, p1x, p1y, tb_project_to_sphere(tbSize, p1x, p1y) );
vset( p2, p2x, p2y, tb_project_to_sphere(tbSize, p2x, p2y) );
// Now, we want the cross product of P1 and P2
vcross( p2, p1, a);
// Figure out how much to rotate around that axis
vsub( p1, p2, d);
t = vlength(d) / ( 2.0f * tbSize );
// Avoid problems with out-of-control values
if (t > 1.0) {
t = 1.0;
}
if (t < -1.0) {
t = -1.0;
}
phi = 2.0f * (float)asin(t);
axis_to_quat( a, phi, q );
}
Rubik::Rubik(Level lv,int sz){/*
Up[0] = v[0];
Up[1] = v[1];
Up[2] = v[2];
Up[3] = v[3];
Down[0] = v[7];
Down[1] = v[6];
Down[2] = v[5];
Down[3] = v[4];
Front[0] = v[3];
Front[1] = v[2];
Front[2] = v[6];
Front[3] = v[7];
Back[0] = v[1];
Back[1] = v[0];
Back[2] = v[4];
Back[3] = v[5];
Left[0] = v[0];
Left[1] = v[3];
Left[2] = v[7];
Left[3] = v[4];
Right[0] = v[2];
Right[1] = v[1];
Right[2] = v[5];
Right[3] = v[6];
*/
p[0] = Vec3f(1.5*edge_length, -1.5*edge_length, 1.5*edge_length);
p[1] = Vec3f(1.5*edge_length, 1.5*edge_length, 1.5*edge_length);
p[2] = Vec3f(-1.5*edge_length, 1.5*edge_length, 1.5*edge_length);
p[3] = Vec3f(-1.5*edge_length, -1.5*edge_length, 1.5*edge_length);
for (int i = 0; i < 3; ++i)
for (int j=0; j<3; ++j)
for(int k=0; k<3; ++k){
int p = k+j*3+i*3*3;
blocks[p].pos = Vec3i(k,j,i);
switch(i){
case 0: blocks[p].sf.push_back(Surface(DOWN,DOWN,1));
break;
case 2: blocks[p].sf.push_back(Surface(UP,UP,2));
break;
default:
break;
}
switch(j){
case 0: blocks[p].sf.push_back(Surface(LEFT,LEFT,3));
break;
case 2: blocks[p].sf.push_back(Surface(RIGHT,RIGHT,4));
break;
default:
break;
}
switch(k){
case 0: blocks[p].sf.push_back(Surface(BACK,BACK,5));
break;
case 2: blocks[p].sf.push_back(Surface(FRONT,FRONT,6));
break;
default:
break;
}
}
shuffle(lv);
std::cout << "Selected level is: " << lv << std::endl;
angle=0;
trackball(0,0,curPos);
trackball(0,0,lastPos);
//std::cout << curPos << std::endl;
//std::cout << lastPos << std::endl;
calRotation();
//std::cout << axis[0] << "," << axis[1] << ","<< axis[2] << "," << angle<< std::endl;
axis_to_quat(axis,angle,curquat);
std::printf("curquat = %f %f %f %f\n", curquat[0], curquat[1], curquat[2], curquat[3]);
}
int tachyon_spaceball_update(sbHandle * bh, SceneHandle scene) {
int tx, ty, tz, rx, ry, rz, buttons;
float qq[4];
float xx[3]={1.0, 0.0, 0.0};
float yy[3]={0.0, 1.0, 0.0};
float zz[3]={0.0, 0.0, 1.0};
float m[4][4];
float t[3];
static float transdivisor = 5000.0;
static float angdivisor = 20000.0;
if (bh->sball == NULL)
return -1;
if (sball_getstatus(bh->sball, &tx, &ty, &tz, &rx, &ry, &rz, &buttons)) {
/* negate rotations given by spaceball */
rx = -rx;
ry = -ry;
rz = -rz;
if (buttons) {
if (buttons & SBALL_BUTTON_PICK) {
bh->curtrans[0] = 0.0;
bh->curtrans[1] = 0.0;
bh->curtrans[2] = 0.0;
trackball(bh->curquat, 0.0, 0.0, 0.0, 0.0);
transdivisor = 5000.0;
angdivisor = 20000.0;
bh->camviewvec = bh->orig_camviewvec;
bh->camupvec = bh->orig_camupvec;
bh->camcent = bh->orig_camcent;
}
if (buttons & SBALL_BUTTON_1) {
transdivisor /= 1.2;
angdivisor /= 1.2;
}
else if (buttons & SBALL_BUTTON_2) {
transdivisor *= 1.2;
angdivisor *= 1.2;
}
if (buttons & SBALL_BUTTON_3)
transdivisor /= 1.2;
else if (buttons & SBALL_BUTTON_4)
transdivisor *= 1.2;
if (buttons & SBALL_BUTTON_5)
angdivisor *= 1.2;
else if (buttons & SBALL_BUTTON_6)
angdivisor /= 1.2;
if (buttons & SBALL_BUTTON_7) {
return 1; /* quit the fly through */
}
} /* end of button handling */
t[0] = tx / transdivisor;
t[1] = ty / transdivisor;
t[2] = tz / transdivisor;
/*
* convert rotations and translations from the
* spaceball's coordinate frame into the camera's frame.
*/
bh->newtrans[0] =
t[0] * bh->orig_camrightvec.x +
t[1] * bh->orig_camupvec.x +
t[2] * bh->orig_camviewvec.x;
bh->newtrans[1] =
t[0] * bh->orig_camrightvec.y +
t[1] * bh->orig_camupvec.y +
t[2] * bh->orig_camviewvec.y;
bh->newtrans[2] =
t[0] * bh->orig_camrightvec.z +
t[1] * bh->orig_camupvec.z +
t[2] * bh->orig_camviewvec.z;
/*
* rotate around camera's coordinate frame
*/
xx[0] = bh->orig_camrightvec.x;
xx[1] = bh->orig_camrightvec.y;
xx[2] = bh->orig_camrightvec.z;
yy[0] = bh->orig_camupvec.x;
yy[1] = bh->orig_camupvec.y;
yy[2] = bh->orig_camupvec.z;
zz[0] = bh->orig_camviewvec.x;
zz[1] = bh->orig_camviewvec.y;
zz[2] = bh->orig_camviewvec.z;
/* do rotations */
axis_to_quat(xx, rx / angdivisor, bh->lastquat);
axis_to_quat(yy, ry / angdivisor, qq);
add_quats(qq, bh->lastquat, bh->lastquat);
axis_to_quat(zz, rz / angdivisor, qq);
add_quats(qq, bh->lastquat, bh->lastquat);
add_quats(bh->lastquat, bh->curquat, bh->curquat);
}
else {
usleep(5); /* if no movement then sleep for a tiny bit.. */
}
build_rotmatrix(m, bh->curquat);
/*
* translate along the new axes
*/
t[0] = m[0][0] * bh->newtrans[0] + m[0][1] * bh->newtrans[1] + m[0][2] * bh->newtrans[2];
t[1] = m[1][0] * bh->newtrans[0] + m[1][1] * bh->newtrans[1] + m[1][2] * bh->newtrans[2];
t[2] = m[2][0] * bh->newtrans[0] + m[2][1] * bh->newtrans[1] + m[2][2] * bh->newtrans[2];
bh->camcent.x += t[0];
bh->camcent.y += t[1];
bh->camcent.z += t[2];
/*
* rotate view system with spaceball
*/
bh->camviewvec.x = m[0][0] * bh->orig_camviewvec.x + m[0][1] * bh->orig_camviewvec.y + m[0][2] * bh->orig_camviewvec.z;
bh->camviewvec.y = m[1][0] * bh->orig_camviewvec.x + m[1][1] * bh->orig_camviewvec.y + m[1][2] * bh->orig_camviewvec.z;
bh->camviewvec.z = m[2][0] * bh->orig_camviewvec.x + m[2][1] * bh->orig_camviewvec.y + m[2][2] * bh->orig_camviewvec.z;
bh->camupvec.x = m[0][0] * bh->orig_camupvec.x + m[0][1] * bh->orig_camupvec.y + m[0][2] * bh->orig_camupvec.z;
bh->camupvec.y = m[1][0] * bh->orig_camupvec.x + m[1][1] * bh->orig_camupvec.y + m[1][2] * bh->orig_camupvec.z;
bh->camupvec.z = m[2][0] * bh->orig_camupvec.x + m[2][1] * bh->orig_camupvec.y + m[2][2] * bh->orig_camupvec.z;
/*
* update camera parameters before we render again
*/
rt_camera_position(scene, bh->camcent, bh->camviewvec, bh->camupvec);
return 0;
}
void drawContext::eventHandler(int event, float x, float y)
{
int width = _width, height = _height;
if(_retina){ // x,y for retina are still the same as for non-retina
width /= 2;
height /= 2;
}
_current.set(_scale, _translate, _right, _left,
_bottom, _top, width, height, x, y);
double xx[3] = {1.,0.,0.};
double yy[3] = {0.,1.,0.};
double q[4];
switch(event){
case 0: // finger(s) press the screen
// in this case x and y represent the start point
_start.set(_scale, _translate, _right, _left,
_bottom, _top, width, height, x, y);
_previous.set(_scale, _translate, _right, _left,
_bottom, _top, width, height, x, y);
break;
case 1: // finger move (translate)
// in this case x and y represent the current point
_translate[0] += (_current.wnr[0] - _previous.wnr[0]);
_translate[1] += (_current.wnr[1] - _previous.wnr[1]);
_translate[2] = 0.;
break;
case 2: // fingers move (scale)
// in this case we don't care about previous and current position, x
// represent the scale
_scale[0] = _scale[1] = _scale[2] = x;
_start.recenter(_scale, _translate);
break;
case 3: // fingers move (rotate)
addQuaternion((2. * _previous.win[0] - width) / width,
(height - 2. * _previous.win[1]) / height,
(2. * _current.win[0] - width) / width,
(height - 2. * _current.win[1]) / height);
break;
case 4: // release the finger(s)
// Do nothing ?
break;
case 5: // X view
axis_to_quat(xx, M_PI/2, q);
setQuaternion(q[0], q[1], q[2], q[3]);
break;
case 6: // Y view
axis_to_quat(yy, M_PI/2, q);
setQuaternion(q[0], q[1], q[2], q[3]);
break;
case 7: // Z view
setQuaternion(0., 0., 0., 1.);
break;
default: // all other reset the position
setQuaternion(0., 0., 0., 1.);
for(int i = 0; i < 3; i++){
_translate[i] = 0.;
_scale[i] = 1.;
}
break;
}
_previous.set(_scale, _translate, _right, _left,
_bottom, _top, width, height, x, y);
}
static gboolean
expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
GdkGLContext *glcontext = gtk_widget_get_gl_context (widget);
GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (widget);
float d_quat[4];
float m[4][4];
if (animate)
{
if (counter == rot_count)
{
if (rot_mode[++mode].axis == NULL)
mode = 0;
counter = 0;
}
axis_to_quat (rot_mode[mode].axis,
rot_mode[mode].sign * G_PI_2 / rot_count,
d_quat);
add_quats (d_quat, logo_quat, logo_quat);
counter++;
}
/*** OpenGL BEGIN ***/
if (!gdk_gl_drawable_gl_begin (gldrawable, glcontext))
return FALSE;
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity ();
/* View transformation. */
glTranslatef (0.0, 0.0, -30.0);
glScalef (view_scale, view_scale, view_scale);
build_rotmatrix (m, view_quat);
glMultMatrixf (&m[0][0]);
/* Logo model. */
glPushMatrix ();
build_rotmatrix (m, logo_quat);
glMultMatrixf (&m[0][0]);
glRotatef (90.0, 1.0, 0.0, 0.0);
glCallList (LOGO_CUBE);
glCallList (LOGO_G_FORWARD);
glCallList (LOGO_G_BACKWARD);
glCallList (LOGO_T_FORWARD);
glCallList (LOGO_T_BACKWARD);
glCallList (LOGO_K_FORWARD);
glCallList (LOGO_K_BACKWARD);
glPopMatrix ();
/* Swap buffers. */
if (gdk_gl_drawable_is_double_buffered (gldrawable))
gdk_gl_drawable_swap_buffers (gldrawable);
else
glFlush ();
gdk_gl_drawable_gl_end (gldrawable);
/*** OpenGL END ***/
return TRUE;
}
