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new_init_graphics.c
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/*--------------------------------------------------------------------
new_init_graphics.c
Programmed by: Kenneth Sakai
Company : Lockheed Martin
Date : 3-6-00
Note: The following code is not meant necessarily to be commercial grade
code. It is just meant to be better than the original grad-student version.
K.S.
--------------------------------------------------------------------
*/
#include <stdio.h>
#include "vizual.h"
#include <grass/config.h>
#include <Xm/Xm.h>
#include <Xm/Form.h>
/* include file for GL drawing widget */
#ifdef HAVE_GL_GLWMDRAWA_H
#include <GL/GLwMDrawA.h>
#else
#ifdef HAVE_X11_GLW_GLWMDRAWA_H
#include <X11/GLw/GLwMDrawA.h>
#endif
#endif
#include "Ball.h"
BallData Trackball;
#include "kns_defines.h"
#include "kns_globals.h"
#include <X11/Xlib.h>
#include <X11/extensions/XI.h>
#include <X11/extensions/XInput.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#define MAXTHRESHOLDS 200
static Widget Threshbutton[MAXTHRESHOLDS];
static Widget Button_plus;
static Widget Button_minus;
static Widget SingleToggle, MultipleToggle;
static Widget ThresholdRadio;
static Widget PlotSelected;
static int MultipleThresholdFlag;
static int ProceedStatus;
static GLuint FontBase;
static int Attributes[] = { GLX_RGBA, GLX_DEPTH_SIZE, 16, GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1, GLX_DOUBLEBUFFER, None
};
static int SingleAttributes[] = { GLX_RGBA, GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1, GLX_DOUBLEBUFFER, None
};
static int RotationEnabled;
void glinitCB(Widget widget, XtPointer client_data, XtPointer cdata);
void glexposeCB(Widget widget, XtPointer client_data, XtPointer cdata);
void glinputCB(Widget widget, XtPointer client_data, XtPointer cdata);
void glresizeCB(Widget widget, XtPointer client_data, XtPointer cdata);
void glexpose2CB(Widget widget, XtPointer client_data, XtPointer cdata);
void glresize2CB(Widget widget, XtPointer client_data, XtPointer cdata);
void ThresholdCB(Widget widget, XtPointer client_data, XtPointer call_data);
void PlusMinusCB(Widget widget, XtPointer client_data, XtPointer call_data);
void SingleMultipleCB(Widget widget, XtPointer client_data, XtPointer cdata);
void PlotSelectedCB(Widget widget, XtPointer client_data, XtPointer cdata);
void set_threshold_button(int iset);
void draw_ctable();
void rotateLoop();
void draw_multiple();
/*-------------------------------------------------------------------
get_trackball_rotation_matrix()
This functions retrieves the current trackball rotation matrix.
-------------------------------------------------------------------
*/
void get_trackball_rotation_matrix(float mat[4][4])
{
int i, j;
HMatrix mNow;
Ball_Value(&Trackball, mNow);
for (i = 0; i < QuatLen; i++)
for (j = 0; j < QuatLen; j++)
mat[i][j] = mNow[i][j];
}
/*-------------------------------------------------------------------
This functions set the trackball state based upon the set of rotation
angles contained in the dspect struct.
-------------------------------------------------------------------
*/
void set_trackball_rotations(struct dspec *D_spec)
{
GLfloat tranmat[4][4];
glPushMatrix();
glLoadIdentity();
glRotatef(.1 * (D_spec->yrot * 10), 0., 1., 0.);
glRotatef(.1 * (D_spec->zrot * 10), 0., 0., 1.);
glRotatef(.1 * (D_spec->xrot * 10), 1., 0., 0.);
glGetFloatv(GL_MODELVIEW_MATRIX, (GLfloat *) tranmat);
Ball_SetMatrix(&Trackball, tranmat);
glPopMatrix();
}
/*-------------------------------------------------------------------
new_swapbuffers()
This is an OpenGL version of the IRISGL swapbuffers() function.
-------------------------------------------------------------------
*/
void new_swapbuffers()
{
glXSwapBuffers(XtDisplay(MainOGLWindow.widget), MainOGLWindow.window);
}
/*-------------------------------------------------------------------
enableRotation()
-------------------------------------------------------------------
*/
void enableRotation()
{
RotationEnabled = 1;
}
/*-------------------------------------------------------------------
disableRotation()
-------------------------------------------------------------------
*/
void disableRotation()
{
RotationEnabled = 0;
}
/*-------------------------------------------------------------------
new_swapbuffers()
This is a substitute for the IRISGL getsize() function.
-------------------------------------------------------------------
*/
void new_getsize(long *x, long *y)
{
*x = MainOGLWindow.width;
*y = MainOGLWindow.height;
}
/*-------------------------------------------------------------------
initializeFonts()
This function initializes the OpenGL display lists required for drawing
2D text in a 3D window. FontBase will end up pointing to a sequence
of display lists in which each individual display character in a font.
The font chosen in a Courier Bold font chosen to match the font used
by the IRISGL charstr() function.
-------------------------------------------------------------------
*/
void initializeFonts()
{
XFontStruct *fontInfo;
Font id;
GLuint base;
unsigned int first, last;
fontInfo = XLoadQueryFont(XtDisplay(MainOGLWindow.widget),
"-adobe-courier-bold-r-normal--14-100-100-100-m-90-iso8859-1");
id = fontInfo->fid;
first = fontInfo->min_char_or_byte2;
last = fontInfo->max_char_or_byte2;
base = glGenLists((GLuint) last + 1);
glXUseXFont(id, first, last - first + 1, base + first);
XFreeFont(XtDisplay(MainOGLWindow.widget), fontInfo);
FontBase = base;
}
/*-------------------------------------------------------------------
new_charstr()
This is an OpenGL version of the IRISGL charstr() function. The initializeFonts
function must have been called prior to calling this function.
-------------------------------------------------------------------
*/
void new_charstr(char *str)
{
glPushAttrib(GL_LIST_BIT);
glListBase(FontBase);
glCallLists(strlen(str), GL_UNSIGNED_BYTE, (GLubyte *) str);
glPopAttrib();
}
/*-------------------------------------------------------------------
winset_main()
This function is the equivalent of the IRISGL winset command for
the main 3D drawing window.
-------------------------------------------------------------------
*/
void winset_main()
{
glXMakeCurrent(XtDisplay(MainOGLWindow.widget), MainOGLWindow.window,
MainOGLWindow.glx_context);
}
/*-------------------------------------------------------------------
loadrect()
This function loads a file created via the loadrect() function into the
framebuffer ff the main 3D drawing window
-------------------------------------------------------------------
*/
int loadrect(char *name)
{
FILE *fp;
unsigned long *buffer;
float xd, yd, zd, trd;
float aspect;
int xsiz, ysiz;
long xsiz2, ysiz2;
new_getsize(&xsiz2, &ysiz2);
winset_main();
fp = fopen(name, "r");
if (!fp) {
fprintf(stderr, "Unable to open file <%s>\n", name);
G_free(buffer);
return 0;
}
fread(&xsiz, sizeof(int), 1, fp);
fread(&ysiz, sizeof(int), 1, fp);
if (NULL ==
(buffer = (unsigned long *)G_malloc(xsiz * ysiz * sizeof(long)))) {
fprintf(stderr, "Out of memory\n");
return -1;
}
if (ysiz != fread(buffer, xsiz * sizeof(long), ysiz, fp))
fprintf(stderr, "Unable to write file <%s>\n", name);
clear_screen();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, xsiz2, 0, ysiz2, -100., 10);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRasterPos2i(0, 0);
glDrawPixels(xsiz, ysiz, GL_RGBA, GL_BYTE, buffer);
glXSwapBuffers(XtDisplay(MainOGLWindow.widget), MainOGLWindow.window);
fclose(fp);
G_free(buffer);
aspect = (float)MainOGLWindow.width / (float)MainOGLWindow.height;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45., aspect, .10, 1000.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
xd = Headfax.xdim * MainOGLWindow.ptr_D_spec->xscale;
yd = Headfax.ydim * MainOGLWindow.ptr_D_spec->yscale;
zd = Headfax.zdim * MainOGLWindow.ptr_D_spec->zscale;
/* pick greatest dimension to use for translation of viewer from origin */
if (xd < yd)
trd = yd;
else
trd = xd;
if (trd < zd)
trd = zd;
glTranslatef(0.0, 0.0, -trd * 1.6);
return (0);
}
/*-------------------------------------------------------------------
dumprect()
This function dumps the framebuffer from the main 3D drawing window
into a file.
-------------------------------------------------------------------
*/
int dumprect(char *name)
{
FILE *fp;
long xsiz, ysiz;
unsigned long *buffer;
new_getsize(&xsiz, &ysiz);
if (NULL ==
(buffer = (unsigned long *)G_malloc(xsiz * ysiz * sizeof(long)))) {
fprintf(stderr, "Out of memory\n");
return -1;
}
winset_main();
fp = fopen(name, "w");
if (!fp) {
fprintf(stderr, "Unable to open file <%s>\n", name);
G_free(buffer);
return 0;
}
/* write dims */
fwrite(&xsiz, sizeof(int), 1, fp);
fwrite(&ysiz, sizeof(int), 1, fp);
glReadBuffer(GL_FRONT);
glReadPixels(0, 0, xsiz, ysiz, GL_RGBA, GL_BYTE, buffer);
if (ysiz != fwrite(buffer, xsiz * sizeof(long), ysiz, fp))
fprintf(stderr, "Unable to write file <%s>\n", name);
fclose(fp);
G_free(buffer);
return (0);
}
/*-------------------------------------------------------------------
dumpgif()
This function dumps the framebuffer from the main 3D drawing window
into a GIF file.
-------------------------------------------------------------------
*/
#define CPACKTORGBA(l,r,g,b,a) \
(r) = ((l)>>0) & 0xff; \
(g) = ((l)>>8) & 0xff; \
(b) = ((l)>>16) & 0xff; \
(a) = ((l)>>24) & 0xff;
#include "togif.h"
int dumpgif(char *name)
{
FILE *fp;
long xwid, ywid;
unsigned long *pixels;
long numpixels;
vgl_GIFWriter *writer;
int i;
unsigned short red, green, blue, alpha;
new_getsize(&xwid, &ywid);
if (xwid % 2)
xwid--;
if (ywid % 2)
ywid--;
if (NULL ==
(pixels = (unsigned long *)G_malloc(xwid * ywid * sizeof(long)))) {
fprintf(stderr, "Out of memory\n");
return -1;
}
winset_main();
fp = fopen(name, "wb");
if (!fp) {
fprintf(stderr, "Unable to open file <%s>\n", name);
G_free(pixels);
return 0;
}
glReadBuffer(GL_FRONT);
glReadPixels(0, 0, xwid, ywid, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
numpixels = xwid * ywid;
for (i = 0; i < numpixels; i++) {
CPACKTORGBA(pixels[i], red, green, blue, alpha);
#ifdef WIN32
pixels[i] = red | (green << 8) | (blue << 16) | (alpha << 24);
#else
pixels[i] = alpha | (blue << 8) | (green << 16) | (red << 24);
#endif
}
writer = vgl_GIFWriterBegin();
vgl_GIFWriterWriteGIFFile(writer, pixels, xwid, ywid, 0, fp);
fclose(fp);
G_free(pixels);
return (0);
}
/*-------------------------------------------------------------------
winset_colortable()
This function is the equivalent of the IRISGL winset command for
the colormap window.
-------------------------------------------------------------------
*/
void winset_colortable()
{
glXMakeCurrent(XtDisplay(ColormapWindow.widget), ColormapWindow.window,
ColormapWindow.glx_context);
}
/*-------------------------------------------------------------------
init_graphics()
This function creates both the main 3D drawing window and the 2D
colormap window.
-------------------------------------------------------------------
*/
#include <Xm/PushB.h>
#include <Xm/RowColumn.h>
#include <Xm/Label.h>
#include <Xm/ToggleB.h>
#include <Xm/Frame.h>
#include <Xm/SeparatoG.h>
#include <grass/gis.h>
static String Fallback_resources[] = {
"*.fontList:-adobe-helvetica-bold-r-normal--12-120-75-75-p-70-iso8859-1",
"*Thresholds.fontList:-adobe-helvetica-bold-r-normal--17-120-100-100-p-92-iso8859-1",
};
void init_graphics(char *name, int argc, char **argv, struct dspec *dspecptr)
{
int n;
Arg args[20]; /* array used to set widget resources */
XVisualInfo *vi;
XEvent event;
Widget toplevel, form;
int i;
char buffer[20];
Widget separator;
Widget gl_shell;
Widget buttonrowcol, label1, radio;
Widget frame;
MainOGLWindow.ptr_D_spec = dspecptr;
n = 0;
XtSetArg(args[n], XmNwidth, 660);
n++;
XtSetArg(args[n], XmNheight, 600);
n++;
XtSetArg(args[n], XmNx, 10);
n++;
XtSetArg(args[n], XmNy, 100);
n++;
toplevel = XtAppInitialize(&App_context, "Showdspf", NULL,
0, &argc, argv, Fallback_resources, args, n);
/*
* Create the 3D drawing window
*/
n = 0;
XtSetArg(args[n], XmNwidth, 660);
n++;
XtSetArg(args[n], XmNheight, 600);
n++;
XtSetArg(args[n], XmNx, 10);
n++;
XtSetArg(args[n], XmNy, 100);
n++;
form = XmCreateForm(toplevel, "form", args, n);
XtManageChild(form);
vi = glXChooseVisual(XtDisplay(form), DefaultScreen(XtDisplay(form)),
Attributes);
if (!vi) {
fprintf(stderr, "Fatal error: Couldn't get a visual\n");
fprintf(stderr, "See program developer.\n");
exit(1);
}
n = 0;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNshadowThickness, 3);
n++;
XtSetArg(args[n], XmNshadowType, XmSHADOW_OUT);
n++;
frame = XmCreateFrame(form, "frame_r", args, n);
XtManageChild(frame);
n = 0;
XtSetArg(args[n], XmNentryAlignment, XmALIGNMENT_CENTER);
n++;
XtSetArg(args[n], XmNpacking, XmPACK_TIGHT);
n++;
XtSetArg(args[n], XmNorientation, XmVERTICAL);
n++;
XtSetArg(args[n], XmNnumColumns, 1);
n++;
XtSetArg(args[n], XmNmarginHeight, 0);
n++;
XtSetArg(args[n], XmNmarginWidth, 0);
n++;
buttonrowcol = XmCreateRowColumn(frame, "rowcol", args, n);
XtManageChild(buttonrowcol);
label1 = XmCreateLabel(buttonrowcol, "Thresholds", args, n);
XtManageChild(label1);
n = 0;
XtSetArg(args[n], XmNshadowThickness, 5);
n++;
separator = XmCreateSeparatorGadget(buttonrowcol, "separator1", args, n);
XtManageChild(separator);
n = 0;
radio = XmCreateRadioBox(buttonrowcol, "radio", args, n);
XtManageChild(radio);
n = 0;
SingleToggle =
XtVaCreateManagedWidget("Single", xmToggleButtonWidgetClass, radio,
NULL);
XtAddCallback(SingleToggle, XmNarmCallback, SingleMultipleCB,
(XtPointer) 1);
MultipleToggle =
XtVaCreateManagedWidget("Multiple", xmToggleButtonWidgetClass, radio,
NULL);
XtAddCallback(MultipleToggle, XmNarmCallback, SingleMultipleCB,
(XtPointer) 0);
XmToggleButtonSetState(SingleToggle, True, False);
n = 0;
XtSetArg(args[n], XmNshadowThickness, 5);
n++;
separator = XmCreateSeparatorGadget(buttonrowcol, "separator1", args, n);
XtManageChild(separator);
n = 0;
Button_plus =
XtCreateManagedWidget("Increase", xmPushButtonWidgetClass,
buttonrowcol, args, n);
XtAddCallback(Button_plus, XmNactivateCallback, PlusMinusCB,
(XtPointer) 1);
Button_minus =
XtCreateManagedWidget("Decrease", xmPushButtonWidgetClass,
buttonrowcol, args, n);
XtAddCallback(Button_minus, XmNactivateCallback, PlusMinusCB,
(XtPointer) 0);
n = 0;
PlotSelected = XmCreatePushButton(buttonrowcol, "Plot Selected", args, n);
XtAddCallback(PlotSelected, XmNactivateCallback, PlotSelectedCB, NULL);
n = 0;
ThresholdRadio = XmCreateRadioBox(buttonrowcol, "radio", args, n);
XtManageChild(ThresholdRadio);
if (Headfax.linefax.nthres) {
for (i = 1; i <= Headfax.linefax.nthres; i++) {
n = 0;
if (i <= MAXTHRESHOLDS) {
sprintf(buffer, "Threshold %d", i);
Threshbutton[i - 1] =
XtVaCreateManagedWidget(buffer, xmToggleButtonWidgetClass,
ThresholdRadio, NULL);
XtAddCallback(Threshbutton[i - 1], XmNarmCallback,
ThresholdCB, (XtPointer) (i - 1));
}
}
XmToggleButtonSetState(Threshbutton[0], True, False);
}
n = 0;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_WIDGET);
n++;
XtSetArg(args[n], XmNrightWidget, frame);
n++;
XtSetArg(args[n], GLwNvisualInfo, vi);
n++;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM);
n++;
MainOGLWindow.widget = GLwCreateMDrawingArea(form, "glwidget", args, n);
XtManageChild(MainOGLWindow.widget);
XtAddCallback(MainOGLWindow.widget, GLwNginitCallback, glinitCB, 0);
XtAddCallback(MainOGLWindow.widget, GLwNexposeCallback, glexposeCB, 0);
XtAddCallback(MainOGLWindow.widget, GLwNinputCallback, glinputCB, 0);
XtAddCallback(MainOGLWindow.widget, GLwNresizeCallback, glresizeCB, 0);
/*
* Create the colormap window
*/
n = 0;
XtSetArg(args[n], XmNwidth, 100);
n++;
XtSetArg(args[n], XmNheight, 500);
n++;
XtSetArg(args[n], XmNx, 5);
n++;
XtSetArg(args[n], XmNy, 5);
n++;
gl_shell = XtAppCreateShell("Colormap", "GL_window",
topLevelShellWidgetClass, XtDisplay(toplevel),
args, n);
n = 0;
XtSetArg(args[n], XmNwidth, 100);
n++;
XtSetArg(args[n], XmNheight, 500);
n++;
XtSetArg(args[n], XmNx, 5);
n++;
XtSetArg(args[n], XmNy, 5);
n++;
form = XmCreateForm(gl_shell, "form", args, n);
XtManageChild(form);
vi = glXChooseVisual(XtDisplay(form), DefaultScreen(XtDisplay(form)),
SingleAttributes);
if (!vi) {
fprintf(stderr, "Fatal error: Couldn't get a visual\n");
fprintf(stderr, "See program developer.\n");
exit(1);
}
n = 0;
XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], GLwNvisualInfo, vi);
n++;
XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM);
n++;
XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM);
n++;
ColormapWindow.widget = GLwCreateMDrawingArea(form, "glwidget", args, n);
XtManageChild(ColormapWindow.widget);
XtAddCallback(ColormapWindow.widget, GLwNginitCallback, glinitCB,
(void *)1);
XtAddCallback(ColormapWindow.widget, GLwNexposeCallback, glexpose2CB, 0);
XtAddCallback(ColormapWindow.widget, GLwNresizeCallback, glresize2CB, 0);
XtRealizeWidget(toplevel);
XStoreName(XtDisplay(toplevel), XtWindow(toplevel), name);
XtPopup(gl_shell, XtGrabNone);
XMapRaised(XtDisplay(gl_shell), XtWindow(gl_shell));
while (ProceedStatus < 4) {
XtAppNextEvent(App_context, &event);
XtDispatchEvent(&event);
}
}
/*-------------------------------------------------------------------
ThresholdCB()
This is a Motif callback that is called when one of the threshold toggle
buttons is hit.
-------------------------------------------------------------------
*/
void ThresholdCB(Widget widget, XtPointer client_data, XtPointer call_data)
{
int num = (int)client_data;
if (MultipleThresholdFlag)
return;
MainOGLWindow.ptr_D_spec->Thresh = num;
do_draw_immediate_mode();
}
/*-------------------------------------------------------------------
PlusMinusCB()
This is a Motif callback that is called when either the "Increase" or
"Decrease" button is hit in the GUI interface.
-------------------------------------------------------------------
*/
void PlusMinusCB(Widget widget, XtPointer client_data, XtPointer call_data)
{
int flag = (int)client_data;
if (flag) {
MainOGLWindow.ptr_D_spec->Thresh++;
if (MainOGLWindow.ptr_D_spec->Thresh > Headfax.linefax.nthres - 1)
MainOGLWindow.ptr_D_spec->Thresh = 0;
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh + 1);
do_draw_immediate_mode();
}
else {
MainOGLWindow.ptr_D_spec->Thresh--;
if (MainOGLWindow.ptr_D_spec->Thresh < 0)
MainOGLWindow.ptr_D_spec->Thresh = Headfax.linefax.nthres - 1;
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh + 1);
do_draw_immediate_mode();
}
}
/*-------------------------------------------------------------------
set_threshold_button(int iset)
This function sets the GUI toggle button corresponding to a threshold value
-------------------------------------------------------------------
*/
void set_threshold_button(int iset)
{
int i;
for (i = 1; i <= Headfax.linefax.nthres; i++) {
if (i == iset) {
if (i <= MAXTHRESHOLDS)
XmToggleButtonSetState(Threshbutton[i - 1], True, False);
}
else {
if ((i <= MAXTHRESHOLDS) && !MultipleThresholdFlag)
XmToggleButtonSetState(Threshbutton[i - 1], False, False);
}
}
}
/*-------------------------------------------------------------------
unset_threshold_button(int iset)
This function unsets the GUI toggle button corresponding to a threshold value
-------------------------------------------------------------------
*/
void unset_threshold_button(int iset)
{
if (iset <= MAXTHRESHOLDS)
XmToggleButtonSetState(Threshbutton[iset - 1], False, False);
}
/*-------------------------------------------------------------------
rotateLoop()
This function is executed while the user attempts to rotate/translate
the 3D model in the main 3D drawing window
-------------------------------------------------------------------
*/
void rotateLoop()
{
XEvent event;
XKeyPressedEvent *K;
KeySym sym;
int thresh = 1;
for (;;) {
XtAppNextEvent(App_context, &event);
if (event.type == KeyPress) {
K = (XKeyPressedEvent *) & event;
sym =
XKeycodeToKeysym(XtDisplay(MainOGLWindow.widget), K->keycode,
0);
if (sym == XK_Escape) {
fprintf(stderr, "Escape\n");
return;
}
else if (sym == XK_equal) {
if (K->state & ShiftMask) {
MainOGLWindow.ptr_D_spec->Thresh++;
if (MainOGLWindow.ptr_D_spec->Thresh >
Headfax.linefax.nthres - 1)
MainOGLWindow.ptr_D_spec->Thresh = 0;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_minus) {
if (!(K->state & ShiftMask)) {
MainOGLWindow.ptr_D_spec->Thresh--;
if (MainOGLWindow.ptr_D_spec->Thresh < 0)
MainOGLWindow.ptr_D_spec->Thresh =
Headfax.linefax.nthres - 1;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_C) {
clear_screen();
}
else if (sym == XK_1) {
thresh = 0;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_2) {
thresh = 1;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_3) {
thresh = 2;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_4) {
thresh = 3;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_5) {
thresh = 4;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_6) {
thresh = 5;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_7) {
thresh = 6;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_8) {
thresh = 7;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_9) {
thresh = 8;
if (thresh < Headfax.linefax.nthres) {
MainOGLWindow.ptr_D_spec->Thresh = thresh;
do_draw_immediate_mode();
set_threshold_button(MainOGLWindow.ptr_D_spec->Thresh +
1);
}
}
else if (sym == XK_Escape) {
fprintf(stderr, "Escape\n");
return;
}
}
else if (MainOGLWindow.right_button_hit) {
MainOGLWindow.right_button_hit = 0;
return;
}
else {
XtDispatchEvent(&event);
}
}
}
/*-------------------------------------------------------------------
glinputCB()
This function handles all mouse inputs in the main 3D drawing window
-------------------------------------------------------------------
*/
HVect vNow;
HVect vNowLast;
void glinputCB(Widget widget, XtPointer client_data, XtPointer cdata)
{
long xpos, ypos;
static int tr_first = 0;
static int rot_first = 0;
static int tr_oymouse;
static int rot_oxmouse, rot_oymouse;
int dymouse;
GLwDrawingAreaCallbackStruct *call_data =
(GLwDrawingAreaCallbackStruct *) cdata;
if (!RotationEnabled)
return;
switch (call_data->event->type) {
case ButtonPress:
if (call_data->event->xbutton.button == Button1) {
if (MainOGLWindow.middle_button_status == 0) {
MainOGLWindow.left_button_status = 1;
rot_first = 1;
xpos = call_data->event->xbutton.x;
ypos = MainOGLWindow.height - call_data->event->xbutton.y;
vNow.x = (2 * (float)xpos / MainOGLWindow.width) - 1.;
vNow.y = (2 * (float)ypos / MainOGLWindow.height) - 1.;
Ball_Mouse(&Trackball, vNow);
Ball_Update(&Trackball);
Ball_BeginDrag(&Trackball);
}
}
else if (call_data->event->xbutton.button == Button2) {
if (MainOGLWindow.left_button_status == 0) {
tr_first = 1;
MainOGLWindow.middle_button_status = 1;
}
}
else if (call_data->event->xbutton.button == Button3) {
MainOGLWindow.right_button_hit = 1;
}
break;
case ButtonRelease:
if (call_data->event->xbutton.button == Button1) {
MainOGLWindow.left_button_status = 0;
Ball_EndDrag(&Trackball);
Ball_Mouse(&Trackball, vNow);
Ball_Update(&Trackball);
do_draw_with_display_list(MainOGLWindow.ptr_D_spec);
}
else if (call_data->event->xbutton.button == Button2) {
MainOGLWindow.middle_button_status = 0;
}
break;
case MotionNotify:
if (MainOGLWindow.left_button_status) {
/* Rotate 3D scene */
xpos = call_data->event->xmotion.x;
ypos = MainOGLWindow.height - call_data->event->xmotion.y;
if (rot_first) {
rot_oxmouse = xpos;
rot_oymouse = ypos;
rot_first = 0;
}
vNow.x = (2 * (float)xpos / MainOGLWindow.width) - 1.;
vNow.y = (2 * (float)ypos / MainOGLWindow.height) - 1.;
Ball_Mouse(&Trackball, vNow);
Ball_Update(&Trackball);
if (((vNowLast.x - vNow.x) * (vNowLast.x - vNow.x) +
(vNowLast.y - vNow.y) * (vNowLast.y - vNow.y)) > .01) {
vNowLast = vNow;
do_draw_with_display_list(MainOGLWindow.ptr_D_spec);
}
}
else if (MainOGLWindow.middle_button_status) {
/* Translate 3D scene */
xpos = call_data->event->xmotion.x;