1 |
greg |
3.1 |
#ifndef lint |
2 |
greg |
3.9 |
static const char RCSid[] = "$Id: rhd_glx1.c,v 3.8 2012/09/06 00:07:43 greg Exp $"; |
3 |
greg |
3.1 |
#endif |
4 |
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/* |
5 |
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* OpenGL GLX driver for holodeck display. |
6 |
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* Based on x11 driver. |
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*/ |
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#include "standard.h" |
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#include <GL/glx.h> |
12 |
schorsch |
3.3 |
#include <GL/glu.h> |
13 |
greg |
3.1 |
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14 |
schorsch |
3.4 |
#include "platform.h" |
15 |
greg |
3.1 |
#include "rhd_qtree.h" |
16 |
schorsch |
3.3 |
#include "rhdriver.h" |
17 |
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#include "rhdisp.h" |
18 |
greg |
3.1 |
#include "x11icon.h" |
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20 |
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#ifndef RAYQLEN |
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#define RAYQLEN 50000 /* max. rays to queue before flush */ |
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#endif |
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#ifndef FEQ |
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#define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY) |
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#endif |
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28 |
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#ifndef MAXCONE |
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#define MAXCONE 16 /* number of different cone sizes */ |
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#endif |
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#ifndef MAXVERT |
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#define MAXVERT 64 /* maximum number of cone vertices */ |
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#endif |
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#ifndef MINVERT |
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#define MINVERT 4 /* minimum number of cone vertices */ |
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#endif |
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#ifndef DEPTHFACT |
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#define DEPTHFACT 16. /* multiplier for depth tests */ |
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#endif |
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41 |
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#define GAMMA 1.4 /* default gamma correction */ |
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#define MOVPCT 7 /* percent distance to move /frame */ |
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#define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1) |
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#define MOVDEG (-5) /* degrees to orbit CW/down /frame */ |
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#define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0) |
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48 |
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#define MINWIDTH 480 /* minimum graphics window width */ |
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#define MINHEIGHT 400 /* minimum graphics window height */ |
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#define VIEWDIST 356 /* assumed viewing distance (mm) */ |
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#define BORWIDTH 5 /* border width */ |
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#define ourscreen DefaultScreen(ourdisplay) |
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#define ourroot RootWindow(ourdisplay,ourscreen) |
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#define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\ |
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ButtonPressMask|ButtonReleaseMask) |
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#define levptr(etype) ((etype *)¤tevent) |
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struct driver odev; /* global device driver structure */ |
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64 |
greg |
3.5 |
TMstruct *tmGlobal; /* global tone-mapping structure */ |
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greg |
3.1 |
char odev_args[64]; /* command arguments */ |
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68 |
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static XEvent currentevent; /* current event */ |
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70 |
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static int mapped = 0; /* window is mapped? */ |
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static unsigned long ourblack=0, ourwhite=~0; |
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73 |
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static Display *ourdisplay = NULL; /* our display */ |
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static XVisualInfo *ourvinf; /* our visual information */ |
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static Window gwind = 0; /* our graphics window */ |
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static GLXContext gctx; /* our GLX context */ |
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static double pwidth, pheight; /* pixel dimensions (mm) */ |
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80 |
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static double curzmax = 1e4; /* current depth upper limit */ |
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static double nxtzmax = 0.; /* maximum (finite) depth so far */ |
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83 |
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static struct { |
84 |
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double rad; /* cone radius */ |
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int nverts; /* number of vertices */ |
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FVECT *va; /* allocated vertex array */ |
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} cone[MAXCONE]; /* precomputed cones for drawing */ |
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static int inpresflags; /* input result flags */ |
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static int headlocked = 0; /* lock vertical motion */ |
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schorsch |
3.3 |
static int mytmflags(void); |
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static void initcones(void); |
96 |
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static void freecones(void); |
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static void getevent(void); |
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static void draw3dline(FVECT wp[2]); |
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static void draw_grids(void); |
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static int moveview(int dx, int dy, int mov, int orb); |
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static void getmove(XButtonPressedEvent *ebut); |
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static void getkey(XKeyPressedEvent *ekey); |
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static void fixwindow(XExposeEvent *eexp); |
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static void resizewindow(XConfigureEvent *ersz); |
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extern void |
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dev_open( |
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char *id |
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) |
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greg |
3.1 |
{ |
112 |
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extern char *getenv(); |
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static RGBPRIMS myprims = STDPRIMS; |
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static int atlBest[] = {GLX_RGBA, GLX_RED_SIZE,8, |
115 |
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GLX_GREEN_SIZE,8, GLX_BLUE_SIZE,8, |
116 |
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GLX_DEPTH_SIZE,15, None}; |
117 |
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char *ev; |
118 |
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double gamval = GAMMA; |
119 |
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RGBPRIMP dpri = stdprims; |
120 |
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XSetWindowAttributes ourwinattr; |
121 |
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XWMHints ourxwmhints; |
122 |
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XSizeHints oursizhints; |
123 |
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/* set quadtree globals */ |
124 |
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qtMinNodesiz = 3; |
125 |
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qtDepthEps = 0.07; |
126 |
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/* open display server */ |
127 |
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ourdisplay = XOpenDisplay(NULL); |
128 |
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if (ourdisplay == NULL) |
129 |
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error(USER, "cannot open X-windows; DISPLAY variable set?\n"); |
130 |
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/* find a usable visual */ |
131 |
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ourvinf = glXChooseVisual(ourdisplay, ourscreen, atlBest); |
132 |
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if (ourvinf == NULL) |
133 |
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error(USER, "no suitable visuals available"); |
134 |
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/* get a context */ |
135 |
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gctx = glXCreateContext(ourdisplay, ourvinf, NULL, GL_TRUE); |
136 |
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/* set gamma and tone mapping */ |
137 |
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if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL |
138 |
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|| (ev = getenv("DISPLAY_GAMMA")) != NULL) |
139 |
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gamval = atof(ev); |
140 |
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if ((ev = getenv("DISPLAY_PRIMARIES")) != NULL && |
141 |
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sscanf(ev, "%f %f %f %f %f %f %f %f", |
142 |
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&myprims[RED][CIEX],&myprims[RED][CIEY], |
143 |
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&myprims[GRN][CIEX],&myprims[GRN][CIEY], |
144 |
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&myprims[BLU][CIEX],&myprims[BLU][CIEY], |
145 |
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&myprims[WHT][CIEX],&myprims[WHT][CIEY]) >= 6) |
146 |
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dpri = myprims; |
147 |
greg |
3.5 |
tmGlobal = tmInit(mytmflags(), dpri, gamval); |
148 |
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if (tmGlobal == NULL) |
149 |
greg |
3.1 |
error(SYSTEM, "not enough memory in dev_open"); |
150 |
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/* open window */ |
151 |
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ourwinattr.background_pixel = ourblack; |
152 |
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ourwinattr.border_pixel = ourblack; |
153 |
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ourwinattr.event_mask = ourmask; |
154 |
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/* this is stupid */ |
155 |
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ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot, |
156 |
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ourvinf->visual, AllocNone); |
157 |
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gwind = XCreateWindow(ourdisplay, ourroot, 0, 0, |
158 |
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DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH, |
159 |
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DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH, |
160 |
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BORWIDTH, ourvinf->depth, InputOutput, ourvinf->visual, |
161 |
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CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr); |
162 |
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if (gwind == 0) |
163 |
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error(SYSTEM, "cannot create window\n"); |
164 |
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XStoreName(ourdisplay, gwind, id); |
165 |
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/* set window manager hints */ |
166 |
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ourxwmhints.flags = InputHint|IconPixmapHint; |
167 |
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ourxwmhints.input = True; |
168 |
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ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, |
169 |
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gwind, x11icon_bits, x11icon_width, x11icon_height); |
170 |
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XSetWMHints(ourdisplay, gwind, &ourxwmhints); |
171 |
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oursizhints.min_width = MINWIDTH; |
172 |
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oursizhints.min_height = MINHEIGHT; |
173 |
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oursizhints.flags = PMinSize; |
174 |
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XSetNormalHints(ourdisplay, gwind, &oursizhints); |
175 |
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/* set GLX context */ |
176 |
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glXMakeCurrent(ourdisplay, gwind, gctx); |
177 |
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glEnable(GL_DEPTH_TEST); |
178 |
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glDepthFunc(GL_LEQUAL); |
179 |
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glShadeModel(GL_FLAT); |
180 |
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glDisable(GL_DITHER); |
181 |
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glDisable(GL_CULL_FACE); |
182 |
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glMatrixMode(GL_PROJECTION); |
183 |
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glOrtho(0., 1., 0., 1., -.01, 1.01); |
184 |
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glTranslated(0., 0., -1.01); |
185 |
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/* figure out sensible view */ |
186 |
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pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) / |
187 |
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DisplayWidth(ourdisplay, ourscreen); |
188 |
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pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) / |
189 |
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DisplayHeight(ourdisplay, ourscreen); |
190 |
schorsch |
3.2 |
odev.v = stdview; |
191 |
greg |
3.1 |
odev.v.type = VT_PER; |
192 |
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/* map the window */ |
193 |
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XMapWindow(ourdisplay, gwind); |
194 |
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dev_input(); /* sets size and view angles */ |
195 |
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/* allocate our leaf pile */ |
196 |
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if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) * |
197 |
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DisplayHeight(ourdisplay,ourscreen) * 3 / |
198 |
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(qtMinNodesiz*qtMinNodesiz*2))) |
199 |
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error(SYSTEM, "insufficient memory for value storage"); |
200 |
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odev.name = id; |
201 |
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odev.ifd = ConnectionNumber(ourdisplay); |
202 |
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/* initialize cone array */ |
203 |
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initcones(); |
204 |
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} |
205 |
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206 |
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207 |
schorsch |
3.3 |
extern void |
208 |
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dev_close(void) /* close our display and free resources */ |
209 |
greg |
3.1 |
{ |
210 |
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glXMakeCurrent(ourdisplay, None, NULL); |
211 |
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glXDestroyContext(ourdisplay, gctx); |
212 |
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XDestroyWindow(ourdisplay, gwind); |
213 |
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gwind = 0; |
214 |
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XCloseDisplay(ourdisplay); |
215 |
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ourdisplay = NULL; |
216 |
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qtFreeLeaves(); |
217 |
greg |
3.5 |
tmDone(tmGlobal); |
218 |
greg |
3.1 |
freecones(); |
219 |
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odev.v.type = 0; |
220 |
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odev.hres = odev.vres = 0; |
221 |
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odev.ifd = -1; |
222 |
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} |
223 |
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224 |
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225 |
schorsch |
3.3 |
extern void |
226 |
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dev_clear(void) /* clear our quadtree */ |
227 |
greg |
3.1 |
{ |
228 |
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qtCompost(100); |
229 |
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glClear(GL_DEPTH_BUFFER_BIT); |
230 |
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rayqleft = 0; /* hold off update */ |
231 |
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} |
232 |
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233 |
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234 |
schorsch |
3.3 |
extern int |
235 |
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dev_view( /* assign new driver view */ |
236 |
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register VIEW *nv |
237 |
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) |
238 |
greg |
3.1 |
{ |
239 |
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if (nv->type == VT_PAR || /* check view legality */ |
240 |
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nv->horiz > 160. || nv->vert > 160.) { |
241 |
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error(COMMAND, "illegal view type/angle"); |
242 |
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nv->type = odev.v.type; |
243 |
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nv->horiz = odev.v.horiz; |
244 |
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nv->vert = odev.v.vert; |
245 |
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return(0); |
246 |
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} |
247 |
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if (nv->vfore > FTINY) { |
248 |
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error(COMMAND, "cannot handle fore clipping"); |
249 |
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nv->vfore = 0.; |
250 |
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return(0); |
251 |
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} |
252 |
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if (nv != &odev.v) { |
253 |
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if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */ |
254 |
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!FEQ(nv->vert,odev.v.vert)) { |
255 |
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int dw = DisplayWidth(ourdisplay,ourscreen); |
256 |
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int dh = DisplayHeight(ourdisplay,ourscreen); |
257 |
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258 |
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dw -= 25; /* for window frame */ |
259 |
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dh -= 50; |
260 |
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odev.hres = 2.*VIEWDIST/pwidth * |
261 |
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tan(PI/180./2.*nv->horiz); |
262 |
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odev.vres = 2.*VIEWDIST/pheight * |
263 |
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tan(PI/180./2.*nv->vert); |
264 |
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if (odev.hres > dw) { |
265 |
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odev.vres = dw * odev.vres / odev.hres; |
266 |
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odev.hres = dw; |
267 |
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} |
268 |
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if (odev.vres > dh) { |
269 |
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odev.hres = dh * odev.hres / odev.vres; |
270 |
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odev.vres = dh; |
271 |
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} |
272 |
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XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres); |
273 |
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dev_input(); /* get resize event */ |
274 |
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} |
275 |
schorsch |
3.2 |
odev.v = *nv; |
276 |
greg |
3.1 |
} |
277 |
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if (nxtzmax > FTINY) { |
278 |
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curzmax = nxtzmax; |
279 |
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nxtzmax = 0.; |
280 |
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} |
281 |
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glClear(GL_DEPTH_BUFFER_BIT); |
282 |
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qtReplant(); |
283 |
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return(1); |
284 |
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} |
285 |
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286 |
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287 |
schorsch |
3.3 |
extern void |
288 |
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dev_section( /* add octree for geometry rendering */ |
289 |
schorsch |
3.6 |
char *gfn, |
290 |
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char *pfn |
291 |
schorsch |
3.3 |
) |
292 |
greg |
3.1 |
{ |
293 |
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/* unimplemented */ |
294 |
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} |
295 |
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296 |
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297 |
schorsch |
3.3 |
extern void |
298 |
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dev_auxcom( /* process an auxiliary command */ |
299 |
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char *cmd, |
300 |
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char *args |
301 |
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) |
302 |
greg |
3.1 |
{ |
303 |
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sprintf(errmsg, "%s: unknown command", cmd); |
304 |
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error(COMMAND, errmsg); |
305 |
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} |
306 |
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307 |
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308 |
schorsch |
3.3 |
extern VIEW * |
309 |
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dev_auxview( /* return nth auxiliary view */ |
310 |
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int n, |
311 |
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int hvres[2] |
312 |
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) |
313 |
greg |
3.1 |
{ |
314 |
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if (n) |
315 |
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return(NULL); |
316 |
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hvres[0] = odev.hres; hvres[1] = odev.vres; |
317 |
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return(&odev.v); |
318 |
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} |
319 |
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320 |
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321 |
schorsch |
3.3 |
extern int |
322 |
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dev_input(void) /* get X11 input */ |
323 |
greg |
3.1 |
{ |
324 |
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inpresflags = 0; |
325 |
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326 |
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do |
327 |
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getevent(); |
328 |
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329 |
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while (XQLength(ourdisplay) > 0); |
330 |
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331 |
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return(inpresflags); |
332 |
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} |
333 |
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334 |
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335 |
schorsch |
3.3 |
extern int |
336 |
|
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dev_flush(void) /* flush output */ |
337 |
greg |
3.1 |
{ |
338 |
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qtUpdate(); |
339 |
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glFlush(); |
340 |
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rayqleft = RAYQLEN; |
341 |
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return(XPending(ourdisplay)); |
342 |
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} |
343 |
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344 |
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345 |
schorsch |
3.3 |
extern void |
346 |
|
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dev_cone( /* render a cone in view coordinates */ |
347 |
greg |
3.7 |
uby8 rgb[3], |
348 |
schorsch |
3.3 |
FVECT ip, |
349 |
|
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double rad |
350 |
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) |
351 |
greg |
3.1 |
{ |
352 |
|
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register int ci, j; |
353 |
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double apexh, basez; |
354 |
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/* is window mapped? */ |
355 |
|
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if (!mapped) |
356 |
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return; |
357 |
|
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/* compute apex height (0. to 1.) */ |
358 |
|
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if (ip[2] > 1e6) |
359 |
|
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apexh = 1. - 1./DEPTHFACT; |
360 |
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else { |
361 |
|
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if (ip[2] > nxtzmax) |
362 |
|
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nxtzmax = ip[2]; |
363 |
|
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if (ip[2] >= curzmax) |
364 |
|
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apexh = 1. - 1./DEPTHFACT; |
365 |
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else |
366 |
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apexh = 1. - ip[2]/(curzmax*DEPTHFACT); |
367 |
|
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} |
368 |
|
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rad *= 1.25; /* find conservative cone match */ |
369 |
|
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for (ci = 0; ci < MAXCONE-1; ci++) |
370 |
|
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if (cone[ci].rad >= rad) |
371 |
|
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break; |
372 |
|
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/* draw it */ |
373 |
|
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glColor3ub(rgb[0], rgb[1], rgb[2]); |
374 |
|
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glBegin(GL_TRIANGLE_FAN); |
375 |
|
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glVertex3d(ip[0], ip[1], apexh); /* start with apex */ |
376 |
|
|
basez = apexh*cone[ci].va[0][2]; /* base z's all the same */ |
377 |
|
|
for (j = 0; j < cone[ci].nverts; j++) /* draw each face */ |
378 |
|
|
glVertex3d(ip[0]+cone[ci].va[j][0], ip[1]+cone[ci].va[j][1], |
379 |
|
|
basez); |
380 |
|
|
/* connect last to first */ |
381 |
|
|
glVertex3d(ip[0]+cone[ci].va[0][0], ip[1]+cone[ci].va[0][1], basez); |
382 |
|
|
glEnd(); /* all done */ |
383 |
|
|
} |
384 |
|
|
|
385 |
|
|
|
386 |
|
|
static int |
387 |
schorsch |
3.3 |
mytmflags(void) /* figure out tone mapping flags */ |
388 |
greg |
3.1 |
{ |
389 |
|
|
extern char *progname; |
390 |
|
|
register char *cp, *tail; |
391 |
|
|
/* find basic name */ |
392 |
|
|
for (cp = tail = progname; *cp; cp++) |
393 |
|
|
if (*cp == '/') |
394 |
|
|
tail = cp+1; |
395 |
|
|
for (cp = tail; *cp && *cp != '.'; cp++) |
396 |
|
|
; |
397 |
|
|
if (cp-tail == 4 && !strncmp(tail, "glx1", 4)) |
398 |
|
|
return(TM_F_CAMERA|TM_F_NOSTDERR); |
399 |
|
|
if (cp-tail == 5 && !strncmp(tail, "glx1h", 5)) |
400 |
|
|
return(TM_F_HUMAN|TM_F_NOSTDERR); |
401 |
|
|
error(USER, "illegal driver name"); |
402 |
schorsch |
3.3 |
return -1; /* pro forma return */ |
403 |
greg |
3.1 |
} |
404 |
|
|
|
405 |
|
|
|
406 |
schorsch |
3.3 |
static void |
407 |
|
|
initcones(void) /* initialize cone vertices */ |
408 |
greg |
3.1 |
{ |
409 |
|
|
register int i, j; |
410 |
|
|
double minrad, d; |
411 |
|
|
|
412 |
|
|
if (cone[0].nverts) |
413 |
|
|
freecones(); |
414 |
|
|
minrad = 2.*qtMinNodesiz/(double)(DisplayWidth(ourdisplay,ourscreen) + |
415 |
|
|
DisplayHeight(ourdisplay,ourscreen)); |
416 |
|
|
for (i = 0; i < MAXCONE; i++) { |
417 |
|
|
d = (double)i/(MAXCONE-1); d *= d; /* x^2 distribution */ |
418 |
|
|
cone[i].rad = minrad + (1.-minrad)*d; |
419 |
|
|
cone[i].nverts = MINVERT + 0.5 + (MAXVERT-MINVERT)*d; |
420 |
|
|
cone[i].va = (FVECT *)malloc(cone[i].nverts*sizeof(FVECT)); |
421 |
|
|
if (cone[i].va == NULL) |
422 |
|
|
error(SYSTEM, "out of memory in initcones"); |
423 |
|
|
for (j = cone[i].nverts; j--; ) { |
424 |
|
|
d = 2.*PI * (j+.5) / (cone[i].nverts); |
425 |
|
|
cone[i].va[j][0] = cos(d) * cone[i].rad; |
426 |
|
|
cone[i].va[j][1] = sin(d) * cone[i].rad; |
427 |
|
|
cone[i].va[j][2] = 1. - cone[i].rad; |
428 |
|
|
} |
429 |
|
|
} |
430 |
|
|
} |
431 |
|
|
|
432 |
|
|
|
433 |
schorsch |
3.3 |
static void |
434 |
|
|
freecones(void) /* free cone vertices */ |
435 |
greg |
3.1 |
{ |
436 |
|
|
register int i; |
437 |
|
|
|
438 |
|
|
for (i = MAXCONE; i--; ) |
439 |
|
|
if (cone[i].nverts) { |
440 |
|
|
free((void *)cone[i].va); |
441 |
|
|
cone[i].va = NULL; |
442 |
|
|
cone[i].nverts = 0; |
443 |
|
|
} |
444 |
|
|
} |
445 |
|
|
|
446 |
|
|
|
447 |
schorsch |
3.3 |
static void |
448 |
|
|
getevent(void) /* get next event */ |
449 |
greg |
3.1 |
{ |
450 |
|
|
XNextEvent(ourdisplay, levptr(XEvent)); |
451 |
|
|
switch (levptr(XEvent)->type) { |
452 |
|
|
case ConfigureNotify: |
453 |
|
|
resizewindow(levptr(XConfigureEvent)); |
454 |
|
|
break; |
455 |
|
|
case UnmapNotify: |
456 |
|
|
mapped = 0; |
457 |
|
|
break; |
458 |
|
|
case MapNotify: |
459 |
|
|
mapped = 1; |
460 |
|
|
break; |
461 |
|
|
case Expose: |
462 |
|
|
fixwindow(levptr(XExposeEvent)); |
463 |
|
|
break; |
464 |
|
|
case KeyPress: |
465 |
|
|
getkey(levptr(XKeyPressedEvent)); |
466 |
|
|
break; |
467 |
|
|
case ButtonPress: |
468 |
greg |
3.9 |
switch (levptr(XButtonPressedEvent)->button) { |
469 |
|
|
case Button4: /* wheel up */ |
470 |
|
|
case Button5: /* wheel down */ |
471 |
|
|
break; |
472 |
|
|
default: |
473 |
|
|
getmove(levptr(XButtonPressedEvent)); |
474 |
|
|
break; |
475 |
|
|
} |
476 |
greg |
3.1 |
break; |
477 |
|
|
} |
478 |
|
|
} |
479 |
|
|
|
480 |
|
|
|
481 |
schorsch |
3.3 |
static void |
482 |
|
|
draw3dline( /* draw 3d line in world coordinates */ |
483 |
|
|
register FVECT wp[2] |
484 |
|
|
) |
485 |
greg |
3.1 |
{ |
486 |
|
|
glVertex3d(wp[0][0], wp[0][1], wp[0][2]); |
487 |
|
|
glVertex3d(wp[1][0], wp[1][1], wp[1][2]); |
488 |
|
|
} |
489 |
|
|
|
490 |
|
|
|
491 |
schorsch |
3.3 |
static void |
492 |
|
|
draw_grids(void) /* draw holodeck section grids */ |
493 |
greg |
3.1 |
{ |
494 |
greg |
3.7 |
static uby8 gridrgba[4] = {0x0, 0xff, 0xff, 0x00}; |
495 |
greg |
3.1 |
double xmin, xmax, ymin, ymax, zmin, zmax; |
496 |
schorsch |
3.3 |
double d; |
497 |
greg |
3.1 |
/* can we even do it? */ |
498 |
|
|
if (!mapped || odev.v.type != VT_PER) |
499 |
|
|
return; |
500 |
|
|
/* compute view frustum */ |
501 |
|
|
if (normalize(odev.v.vdir) == 0.0) |
502 |
|
|
return; |
503 |
|
|
zmin = 0.01; |
504 |
|
|
zmax = 10000.; |
505 |
|
|
if (odev.v.vfore > FTINY) |
506 |
|
|
zmin = odev.v.vfore; |
507 |
|
|
if (odev.v.vaft > FTINY) |
508 |
|
|
zmax = odev.v.vaft; |
509 |
|
|
xmax = zmin * tan(PI/180./2. * odev.v.horiz); |
510 |
|
|
xmin = -xmax; |
511 |
|
|
d = odev.v.hoff * (xmax - xmin); |
512 |
|
|
xmin += d; xmax += d; |
513 |
|
|
ymax = zmin * tan(PI/180./2. * odev.v.vert); |
514 |
|
|
ymin = -ymax; |
515 |
|
|
d = odev.v.voff * (ymax - ymin); |
516 |
|
|
ymin += d; ymax += d; |
517 |
|
|
/* set view matrix */ |
518 |
|
|
glMatrixMode(GL_PROJECTION); |
519 |
|
|
glPushMatrix(); |
520 |
|
|
glLoadIdentity(); |
521 |
|
|
glFrustum(xmin, xmax, ymin, ymax, zmin, zmax); |
522 |
|
|
gluLookAt(odev.v.vp[0], odev.v.vp[1], odev.v.vp[2], |
523 |
|
|
odev.v.vp[0] + odev.v.vdir[0], |
524 |
|
|
odev.v.vp[1] + odev.v.vdir[1], |
525 |
|
|
odev.v.vp[2] + odev.v.vdir[2], |
526 |
|
|
odev.v.vup[0], odev.v.vup[1], odev.v.vup[2]); |
527 |
|
|
glDisable(GL_DEPTH_TEST); /* write no depth values */ |
528 |
|
|
glColor4ub(gridrgba[0], gridrgba[1], gridrgba[2], gridrgba[3]); |
529 |
|
|
glBegin(GL_LINES); /* draw each grid line */ |
530 |
|
|
gridlines(draw3dline); |
531 |
|
|
glEnd(); |
532 |
|
|
glEnable(GL_DEPTH_TEST); /* restore rendering params */ |
533 |
|
|
glPopMatrix(); |
534 |
|
|
} |
535 |
|
|
|
536 |
|
|
|
537 |
schorsch |
3.3 |
static int |
538 |
|
|
moveview( /* move our view */ |
539 |
|
|
int dx, |
540 |
|
|
int dy, |
541 |
|
|
int mov, |
542 |
|
|
int orb |
543 |
|
|
) |
544 |
greg |
3.1 |
{ |
545 |
|
|
VIEW nv; |
546 |
|
|
FVECT odir, v1; |
547 |
|
|
double d; |
548 |
|
|
register int li; |
549 |
|
|
/* start with old view */ |
550 |
schorsch |
3.2 |
nv = odev.v; |
551 |
greg |
3.1 |
/* change view direction */ |
552 |
|
|
if (mov | orb) { |
553 |
|
|
if ((li = qtFindLeaf(dx, dy)) < 0) |
554 |
|
|
return(0); /* not on window */ |
555 |
|
|
VSUM(odir, qtL.wp[li], nv.vp, -1.); |
556 |
|
|
} else { |
557 |
|
|
if (viewray(nv.vp, nv.vdir, &odev.v, |
558 |
|
|
(dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY) |
559 |
|
|
return(0); /* outside view */ |
560 |
|
|
} |
561 |
|
|
if (orb && mov) { /* orbit left/right */ |
562 |
|
|
spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov); |
563 |
|
|
VSUM(nv.vp, qtL.wp[li], odir, -1.); |
564 |
|
|
spinvector(nv.vdir, nv.vdir, nv.vup, d); |
565 |
|
|
} else if (orb) { /* orbit up/down */ |
566 |
greg |
3.8 |
if (geodesic(odir, odir, nv.vup, |
567 |
|
|
d=MOVDEG*PI/180.*orb, GEOD_RAD) == 0.0) |
568 |
greg |
3.1 |
return(0); |
569 |
|
|
VSUM(nv.vp, qtL.wp[li], odir, -1.); |
570 |
greg |
3.8 |
geodesic(nv.vdir, nv.vdir, nv.vup, d, GEOD_RAD); |
571 |
greg |
3.1 |
} else if (mov) { /* move forward/backward */ |
572 |
|
|
d = MOVPCT/100. * mov; |
573 |
|
|
VSUM(nv.vp, nv.vp, odir, d); |
574 |
|
|
} |
575 |
|
|
if (!mov ^ !orb && headlocked) { /* restore head height */ |
576 |
|
|
VSUM(v1, odev.v.vp, nv.vp, -1.); |
577 |
|
|
d = DOT(v1, odev.v.vup); |
578 |
|
|
VSUM(nv.vp, nv.vp, odev.v.vup, d); |
579 |
|
|
} |
580 |
|
|
if (setview(&nv) != NULL) |
581 |
|
|
return(0); /* illegal view */ |
582 |
|
|
dev_view(&nv); |
583 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
584 |
|
|
return(1); |
585 |
|
|
} |
586 |
|
|
|
587 |
|
|
|
588 |
schorsch |
3.3 |
static void |
589 |
|
|
getmove( /* get view change */ |
590 |
|
|
XButtonPressedEvent *ebut |
591 |
|
|
) |
592 |
greg |
3.1 |
{ |
593 |
|
|
int movdir = MOVDIR(ebut->button); |
594 |
|
|
int movorb = MOVORB(ebut->state); |
595 |
|
|
int oldnodesiz = qtMinNodesiz; |
596 |
|
|
Window rootw, childw; |
597 |
|
|
int rootx, rooty, wx, wy; |
598 |
|
|
unsigned int statemask; |
599 |
|
|
|
600 |
|
|
qtMinNodesiz = 24; /* accelerate update rate */ |
601 |
|
|
XNoOp(ourdisplay); |
602 |
|
|
|
603 |
|
|
while (!XCheckMaskEvent(ourdisplay, |
604 |
|
|
ButtonReleaseMask, levptr(XEvent))) { |
605 |
|
|
|
606 |
|
|
if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw, |
607 |
|
|
&rootx, &rooty, &wx, &wy, &statemask)) |
608 |
|
|
break; /* on another screen */ |
609 |
|
|
|
610 |
|
|
if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) { |
611 |
|
|
sleep(1); |
612 |
|
|
continue; |
613 |
|
|
} |
614 |
|
|
glClear(GL_COLOR_BUFFER_BIT); |
615 |
|
|
qtUpdate(); |
616 |
|
|
draw_grids(); |
617 |
|
|
glFlush(); |
618 |
|
|
} |
619 |
|
|
if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */ |
620 |
|
|
movdir = MOVDIR(levptr(XButtonReleasedEvent)->button); |
621 |
|
|
wx = levptr(XButtonReleasedEvent)->x; |
622 |
|
|
wy = levptr(XButtonReleasedEvent)->y; |
623 |
|
|
moveview(wx, odev.vres-1-wy, movdir, movorb); |
624 |
|
|
} |
625 |
|
|
dev_flush(); |
626 |
|
|
|
627 |
|
|
qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */ |
628 |
|
|
} |
629 |
|
|
|
630 |
|
|
|
631 |
schorsch |
3.3 |
static void |
632 |
|
|
getkey( /* get input key */ |
633 |
|
|
register XKeyPressedEvent *ekey |
634 |
|
|
) |
635 |
greg |
3.1 |
{ |
636 |
|
|
int n; |
637 |
|
|
char buf[8]; |
638 |
|
|
|
639 |
|
|
n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL); |
640 |
|
|
if (n != 1) |
641 |
|
|
return; |
642 |
|
|
switch (buf[0]) { |
643 |
|
|
case 'h': /* turn on height motion lock */ |
644 |
|
|
headlocked = 1; |
645 |
|
|
return; |
646 |
|
|
case 'H': /* turn off height motion lock */ |
647 |
|
|
headlocked = 0; |
648 |
|
|
return; |
649 |
|
|
case 'l': /* retrieve last view */ |
650 |
|
|
inpresflags |= DFL(DC_LASTVIEW); |
651 |
|
|
return; |
652 |
|
|
case 'p': /* pause computation */ |
653 |
|
|
inpresflags |= DFL(DC_PAUSE); |
654 |
|
|
return; |
655 |
|
|
case 'v': /* spit out view */ |
656 |
|
|
inpresflags |= DFL(DC_GETVIEW); |
657 |
|
|
return; |
658 |
|
|
case '\n': |
659 |
|
|
case '\r': /* resume computation */ |
660 |
|
|
inpresflags |= DFL(DC_RESUME); |
661 |
|
|
return; |
662 |
|
|
case CTRL('R'): /* redraw screen */ |
663 |
|
|
if (nxtzmax > FTINY) { |
664 |
|
|
curzmax = nxtzmax; |
665 |
|
|
nxtzmax = 0.; |
666 |
|
|
} |
667 |
|
|
glClear(GL_DEPTH_BUFFER_BIT); |
668 |
|
|
qtRedraw(0, 0, odev.hres, odev.vres); |
669 |
|
|
return; |
670 |
|
|
case CTRL('L'): /* refresh from server */ |
671 |
|
|
if (inpresflags & DFL(DC_REDRAW)) |
672 |
|
|
return; |
673 |
|
|
if (nxtzmax > FTINY) { |
674 |
|
|
curzmax = nxtzmax; |
675 |
|
|
nxtzmax = 0.; |
676 |
|
|
} |
677 |
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
678 |
|
|
draw_grids(); |
679 |
|
|
glFlush(); |
680 |
|
|
qtCompost(100); /* get rid of old values */ |
681 |
|
|
inpresflags |= DFL(DC_REDRAW); /* resend values from server */ |
682 |
|
|
rayqleft = 0; /* hold off update */ |
683 |
|
|
return; |
684 |
|
|
case 'K': /* kill rtrace process(es) */ |
685 |
|
|
inpresflags |= DFL(DC_KILL); |
686 |
|
|
break; |
687 |
|
|
case 'R': /* restart rtrace */ |
688 |
|
|
inpresflags |= DFL(DC_RESTART); |
689 |
|
|
break; |
690 |
|
|
case 'C': /* clobber holodeck */ |
691 |
|
|
inpresflags |= DFL(DC_CLOBBER); |
692 |
|
|
break; |
693 |
|
|
case 'q': /* quit the program */ |
694 |
|
|
inpresflags |= DFL(DC_QUIT); |
695 |
|
|
return; |
696 |
|
|
default: |
697 |
|
|
XBell(ourdisplay, 0); |
698 |
|
|
return; |
699 |
|
|
} |
700 |
|
|
} |
701 |
|
|
|
702 |
|
|
|
703 |
schorsch |
3.3 |
static void |
704 |
|
|
fixwindow( /* repair damage to window */ |
705 |
|
|
register XExposeEvent *eexp |
706 |
|
|
) |
707 |
greg |
3.1 |
{ |
708 |
|
|
int xmin, xmax, ymin, ymax; |
709 |
|
|
|
710 |
|
|
if (odev.hres == 0 || odev.vres == 0) /* first exposure */ |
711 |
|
|
resizewindow((XConfigureEvent *)eexp); |
712 |
|
|
xmin = eexp->x; xmax = eexp->x + eexp->width; |
713 |
|
|
ymin = odev.vres - eexp->y - eexp->height; ymax = odev.vres - eexp->y; |
714 |
|
|
/* clear portion of depth */ |
715 |
|
|
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
716 |
|
|
glDepthFunc(GL_ALWAYS); |
717 |
|
|
glBegin(GL_POLYGON); |
718 |
|
|
glVertex3d((double)xmin/odev.hres, (double)ymin/odev.vres, 0.); |
719 |
|
|
glVertex3d((double)xmax/odev.hres, (double)ymin/odev.vres, 0.); |
720 |
|
|
glVertex3d((double)xmax/odev.hres, (double)ymax/odev.vres, 0.); |
721 |
|
|
glVertex3d((double)xmin/odev.hres, (double)ymax/odev.vres, 0.); |
722 |
|
|
glEnd(); |
723 |
|
|
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
724 |
|
|
glDepthFunc(GL_LEQUAL); |
725 |
|
|
qtRedraw(xmin, ymin, xmax, ymax); |
726 |
|
|
} |
727 |
|
|
|
728 |
|
|
|
729 |
schorsch |
3.3 |
static void |
730 |
|
|
resizewindow( /* resize window */ |
731 |
|
|
register XConfigureEvent *ersz |
732 |
|
|
) |
733 |
greg |
3.1 |
{ |
734 |
|
|
glViewport(0, 0, ersz->width, ersz->height); |
735 |
|
|
|
736 |
|
|
if (ersz->width == odev.hres && ersz->height == odev.vres) |
737 |
|
|
return; |
738 |
|
|
|
739 |
|
|
odev.hres = ersz->width; |
740 |
|
|
odev.vres = ersz->height; |
741 |
|
|
|
742 |
|
|
odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres); |
743 |
|
|
odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres); |
744 |
|
|
|
745 |
|
|
inpresflags |= DFL(DC_SETVIEW); |
746 |
|
|
} |