/*
refreshes camera settings using view parameters such as pan zoom etc
if a camera is selected viewport is switched to 3D
params:ViewInfo , global view variable defined in viewport.c
return value:always 1
*/
static int glupdatecamera(ViewInfo * view)
{
if (view->active_camera == -1)
glTranslatef(-view->panx, -view->pany, view->panz);
/*toggle to active camera */
else {
glMultMatrixf(view->arcball->Transform.M); /*arcball transformations , experimental */
glTranslatef(-view->cameras[view->active_camera]->targetx,
-view->cameras[view->active_camera]->targety, 0);
}
view->clipX1=0;
view->clipX2=0;
view->clipY1=0;
view->clipY2=0;
view->clipZ1=0;
view->clipZ2=0;
GetOGLPosRef(1, view->h - 5, &(view->clipX1), &(view->clipY1),
&(view->clipZ1));
GetOGLPosRef(view->w - 1, 1, &(view->clipX2), &(view->clipY2),
&(view->clipZ2));
if (view->active_camera == -1) {
glScalef(1 / view->zoom * -1, 1 / view->zoom * -1,
1 / view->zoom * -1);
} else {
glScalef(1 / view->cameras[view->active_camera]->r,
1 / view->cameras[view->active_camera]->r,
1 / view->cameras[view->active_camera]->r);
}
return 1;
}
void draw_fisheye_magnifier(ViewInfo * view)
{
if (get_mode(view)==MM_FISHEYE_MAGNIFIER) {
float a;
GLfloat mg_x, mg_y, mg_z;
a = GetOGLDistance((int) view->fmg.constantR);
view->fmg.R = (int) a;
GetOGLPosRef((int) view->mouse.pos.x, (int) view->mouse.pos.y,
&mg_x, &mg_y, &mg_z);
glColor4f((GLfloat) 0.3, (GLfloat) 0.1, (GLfloat) 0.8,
(GLfloat) 1);
if ((view->fmg.x != mg_x) || (view->fmg.y != mg_y)) {
if (view->active_camera == -1) {
/* fisheye_polar(mg_x, mg_y, view->Topview); */
draw_circle(mg_x, mg_y, a);
}
else {
/* fisheye_spherical(mg_x, mg_y, 0.00, view->Topview); */
if (!fisheyesphere)
fisheyesphere = gluNewQuadric();
gluQuadricDrawStyle(fisheyesphere, GLU_LINE);
glColor4f((GLfloat) 0.3, (GLfloat) 0.1, (GLfloat) 0.8, (GLfloat) 0.05);
glTranslatef(mg_x, mg_y, 0);
gluSphere(fisheyesphere, a, 30, 30);
glTranslatef(-mg_x, -mg_y, 0);
}
view->fmg.x = mg_x;
view->fmg.y = mg_y;
}
}
}
void draw_magnifier(ViewInfo * view)
{
if ((get_mode(view) == MM_MAGNIFIER)
&& (view->mouse.down)) {
GLfloat mg_x, mg_y, mg_z;
//converting screen pixel distaances to GL distances
view->mg.GLwidth = GetOGLDistance(view->mg.width) / (float) 2.0;
view->mg.GLheight = GetOGLDistance(view->mg.height) / (float) 2.0;
GetOGLPosRef((int) view->mouse.pos.x, (int) view->mouse.pos.y, &mg_x, &mg_y, &mg_z); //retrieving mouse coords as GL coordinates
view->mg.x = mg_x;
view->mg.y = mg_y;
glLineWidth(4);
// local_zoom(view->Topview);
//drawing the magnifier borders
glBegin(GL_LINE_STRIP);
glColor4f((GLfloat) 0.3, (GLfloat) 0.1, (GLfloat) 0.8,
(GLfloat) 1);
glVertex3f(view->mg.x - view->mg.GLwidth,
view->mg.y - view->mg.GLheight, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x + view->mg.GLwidth,
view->mg.y - view->mg.GLheight, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x + view->mg.GLwidth,
view->mg.y + view->mg.GLheight, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x - view->mg.GLwidth,
view->mg.y + view->mg.GLheight, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x - view->mg.GLwidth,
view->mg.y - view->mg.GLheight, Z_MIDDLE_PLANE);
glEnd();
glBegin(GL_TRIANGLE_FAN);
glColor4f(1, 1, 1, 1);
glVertex3f(view->mg.x - view->mg.GLwidth + 1,
view->mg.y - view->mg.GLheight + 1, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x + view->mg.GLwidth - 1,
view->mg.y - view->mg.GLheight + 1, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x + view->mg.GLwidth - 1,
view->mg.y + view->mg.GLheight - 1, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x - view->mg.GLwidth + 1,
view->mg.y + view->mg.GLheight - 1, Z_MIDDLE_PLANE);
glVertex3f(view->mg.x - view->mg.GLwidth + 1,
view->mg.y - view->mg.GLheight + 1, Z_MIDDLE_PLANE);
glEnd();
glLineWidth(1);
}
}
/*
when a mouse button is clicked this function is called
params:gtk opgn gl canvas , GdkEventButton object and custom data
return value:true or false, fails (false) if cannot init gl
*/
static gboolean button_press_event(GtkWidget * widget,
GdkEventButton * event, gpointer data)
{
if (view->graphCount) {
if (glCompSetClick
(view->Topview->topviewmenu, (int) event->x, (int) event->y))
expose_event(view->drawing_area, NULL, NULL);
}
begin_x = (float) event->x;
begin_y = (float) event->y;
if (event->button == 3) //right click
view->mouse.button = rightmousebutton;
if (event->button == 1) //left click
{
view->prevpanx = view->panx;
view->prevpany = view->pany;
view->mouse.mouse_down = 1;
view->mouse.button = leftmousebutton;
if (GetOGLPosRef
((int) begin_x, (int) begin_y, &(view->GLx), &(view->GLy),
&(view->GLz))) {
if (view->mouse.mouse_mode == MM_SINGLE_SELECT) //single select
{
view->Selection.Active = 1;
view->Selection.Type = 0;
view->Selection.AlreadySelected = 0;
view->Selection.X = view->GLx - SINGLE_SELECTION_WIDTH / 2;
view->Selection.Y = view->GLy - SINGLE_SELECTION_WIDTH / 2;
view->Selection.W = SINGLE_SELECTION_WIDTH;
view->Selection.H = SINGLE_SELECTION_WIDTH;
expose_event(view->drawing_area, NULL, NULL);
}
}
}
return FALSE;
}