trying to split up hackvr.c into graphical and non-graphical stuff to make it easier to port it to different graphic systems

1 files changed, 1065 insertions, 0 deletions

diff --git a/src/x11.c b/src/x11.c
new file mode 100644
index 0000000..fc8bf24
--- /dev/null
+++ b/src/x11.c
@@ -0,0 +1,1065 @@
+#define _POSIX_C_SOURCE 200809L //for fileno and strdup
+#define _BSD_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <stdlib.h>
+//#include <sys/select.h> //code to use select instead of non-blocking is commented out. might decide to use it later.
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/cursorfont.h>
+#include <X11/Xutil.h> //for size hints
+#include <time.h>
+#define __USE_GNU //for longer math constants
+#include <math.h>
+
+//TODO: optimizations
+//TODO: store caches of cs_t, c2_t, and c3_t numbers.
+//TODO: don't forget to remake gophervr with this.
+//TODO: XSegment or line structs to store some shit?
+//TODO: line and triangle intersection for finding what object was clicked on
+//if I don't do hiliting I only need to calculate that upon click.
+
+#define WALK_SPEED 1
+#define SPLIT_SCREEN 1
+#define CAMERA_SEPARATION 4
+#define RED_AND_BLUE 0
+
+#define SHAPES 16386
+#define MAX_SIDES 8
+
+#define min(a,b) (((a)<(b))?(a):(b))
+#define max(a,b) (((a)>(b))?(a):(b))
+
+typedef double long real; //think this conflicts?
+//typedef float real; //think this conflicts?
+
+typedef struct {
+ real x;
+ real y;
+ real z;
+} c3_t;
+
+typedef struct {
+ real x;
+ real y;
+} c2_t;
+
+typedef struct { //same as XPoint, just use that? nah...
+ short x;
+ short y;
+} cs_t;
+
+//TODO: will have to make some pixmaps get resized when the window does.
+//for now set them to be as big as you think you'll ever resize the window to.
+#define WIDTH 1024
+#define HEIGHT 768
+
+#define SKYRULE 90
+#define SKYW (WIDTH*5)
+#define SKYH (HEIGHT/2)
+
+Pixmap skypixmap;
+char sky[SKYH][SKYW];
+
+struct object_1 {
+ int type;
+ unsigned char x;
+ unsigned char y;
+ unsigned char z;
+};
+
+struct object_2 {
+ int type;
+ unsigned short x;
+ unsigned short y;
+ unsigned short z;
+};
+
+struct object_4 {
+ int type;
+ unsigned int x;
+ unsigned int y;
+ unsigned int z;
+};
+
+struct camera {
+  c3_t p;
+  int xr;//rotations
+  int yr;
+  int zr;
+  real zoom;
+} camera;
+
+struct c3_line {
+ char *id;
+ c3_t p1;
+ c3_t p2;
+};
+
+struct c3_shape {//use array or linked list?
+  char *id;
+  unsigned char len;
+  c3_t p[MAX_SIDES];
+};
+
+struct mainwin {
+  int x;
+  int y;
+  unsigned int depth;
+  int mousex;
+  int mousey;
+  int rmousex;
+  int rmousey;
+  int buttonpressed;
+  unsigned int width;
+  unsigned int height;
+  unsigned int border_width;
+  XColor colors[256];
+  int xoff;
+  int math_error;
+  int mapxoff;
+  int mapyoff;
+  int split_screen;
+  int split_flip;//1 or -1
+  char *user;
+  char greyscale;
+  char headless;
+  char drawminimap;//flag
+  char draw3d;//flag
+  char debug;//flag
+  char drawsky;//flag
+  char zsort;
+  char red_and_blue;
+  char force_redraw;
+  char selected_object[256];//meh
+  real mmz;
+  XColor green;
+  XColor red;
+  XColor blue;
+  XColor redblue[2];
+  Colormap color_map;
+  Display *dpy;
+  Window w;
+  Pixmap backbuffer;
+  Pixmap cleanbackbuffer;
+  GC gc;
+  GC backgc;
+  struct c3_shape *shape[SHAPES];
+  int shapes;
+  int derp;
+  int root_window;
+  real split;
+  int oldtime;
+  int oldfps;
+  int fps;
+} global;
+
+#ifdef GRAPHICAL
+
+//used to figure out what c2 values are associated with each edge of the window.
+//#define TOP     160.0
+//#define BOTTOM  -160.0
+#define TOP     240.0
+#define BOTTOM  -240.0
+#define RIGHT   320.0
+#define LEFT    -320.0
+
+int c2sX(long double x) { return (global.width/(global.split_screen / (global.red_and_blue ? global.split_screen: 1))) * ((x + RIGHT) / (RIGHT *2)) + global.xoff; }
+int s2cX(long double x) { return (x/(global.width/(global.split_screen / (global.red_and_blue?global.split_screen :1))))*(RIGHT*2)-RIGHT; }
+
+int c2sY(long double y) { return global.height * ((TOP-y) / (TOP*2)); }
+int s2cY(long double y) { return -((y/global.height) * (TOP*2) - TOP); }
+
+cs_t c2_to_cs(c2_t p) {
+ return (cs_t){c2sX(p.x),c2sY(p.y)};
+}
+c2_t cs_to_c2(cs_t p) {
+ return (c2_t){s2cX(p.x),s2cY(p.y)};
+}
+
+long double distance2(c2_t p1,c2_t p2) {
+ return sqrtl(( (p1.x-p2.x)*(p1.x-p2.x) )+( (p1.y-p2.y)*(p1.y-p2.y) ));
+}
+
+long double distance3(c3_t p1,c3_t p2) {
+ return sqrtl(( (p1.x-p2.x)*(p1.x-p2.x) )+( (p1.y-p2.y)*(p1.y-p2.y) )+( (p1.z-p2.z)*(p1.z-p2.z) ));
+}
+
+long double points_to_angle(c2_t p1,c2_t p2) {
+  long double a=atan2l(p2.y-p1.y,p2.x-p1.x);
+  return a>=0?a:M_PIl+M_PIl+a;
+}
+
+long double d2r(int d) {
+ while(d<0) d+=360;
+ return (long double)(d%360) / (long double)180 * M_PIl;
+}
+int r2d(real r) {
+ return r / M_PIl * 180;
+}
+
+int between_angles(real angle,real lower,real upper) {
+  //lower may be higher than upper.
+  //because lower is < 0 which wraps to higher. lower is 270, upper is 90. 270-90 is in front.
+  if(lower > upper) {
+    if(angle > lower) return 1;
+    if(angle < upper) return 1;
+  }
+  if(upper > lower) {
+    if(angle > lower && angle < upper) return 1;
+  }
+  return 0;
+}
+
+/*
+B (x2,y2)
+ |-.   c
+a|  '-.
+ |     '-.
+ '--------~
+C    b     A (x1,y1)
+*/
+
+//I'll need this for collision I guess.
+
+/*
+
+//use this for finding a line that intersects with what the camera is pointing at
+c2_t get_c2_intersection(c2_t p1,real theta,c2_t p2) {
+  real c;
+  c=distance2(p1,p2);
+  theta_a=C A B
+  b = (c/1) * (theta_a + theta_offset)
+}
+
+int get_2D_intersection_X(x1,y1,theta_offset,x2,y2) {
+ int x3a,y3a,x3b,y3b;
+ int a,b,c;//lenght of sides.
+ int theta_a,theta_b,theta_c;//angles opposite of same named sides.
+
+ //get angle C A B
+ theta_a=
+// x1,y1,x2,y2
+
+//what are these d1 and d2?
+ if(d1==d2) return global.math_error=1;
+ c=dist(x1,y1,x2,y2);
+ b = (c/1) * (theta_a + theta_offset);
+ a = (c/1) * (theta_b + theta_offset);
+
+ x3b=sin(theta_a) * b;
+ y3b=cos(theta_a) * b;
+ x3a=sin(theta_a) * a;
+ y3a=cos(theta_a) * a;
+ printf("x: %d %d\nx: %d %d\n",x3a,y3a,x3b,y3b);
+}
+
+int get_2D_intersection_Y(x,y,d,x,z,d) {
+ int x3a,y3a,x3b,y3b;
+ int a,b,c;//lenght of sides.
+ int theta_a,theta_b,theta_c;//angles opposite of same named sides.
+
+ //get angle from A to B.
+ x1,y1,x2,y2
+
+ if(d1==d2) return global.math_error=1;
+ c=dist(x1,y1,x2,y2);
+ b = (c/1) * theta_a;
+ a = (c/1) * theta_b;
+
+ x3b=sin(a) * b;
+ y3b=cos(a) * b;
+ x3a=sin(a) * a;
+ y3a=cos(a) * a;
+ printf("y: %d %d\ny: %d %d\n",x3a,y3a,x3b,y3b);
+}
+*/
+
+void draw_cs_line(cs_t p1,cs_t p2) {
+  XDrawLine(global.dpy,global.backbuffer,global.backgc,p1.x,p1.y,p2.x,p2.y);
+}
+
+void draw_c2_line(c2_t p1,c2_t p2) {
+  draw_cs_line(c2_to_cs(p1),c2_to_cs(p2));
+}
+
+#define MAGIC(x) (1.0l-(1.0l/powl(1.01l,(x)))) //??? might want to have some changables in here
+
+real magic(real x) {
+  return MAGIC(x);
+}
+
+void draw_graph(real (*fun)(real x)) {
+ c2_t pa;
+ draw_c2_line((c2_t){LEFT,0},(c2_t){RIGHT,0});
+ draw_c2_line((c2_t){0,TOP},(c2_t){0,BOTTOM});
+ for(pa.x=LEFT;pa.x<RIGHT;pa.x+=5.0) {
+  draw_c2_line((c2_t){pa.x,2.0},(c2_t){pa.x,-2.0});
+ }
+ for(pa.y=BOTTOM;pa.y<TOP;pa.y+=5.0) {
+  draw_c2_line((c2_t){-2.0,pa.y},(c2_t){2.0,pa.y});
+ }
+ for(pa.x=LEFT;pa.x<RIGHT;pa.x+=1.0) {
+  draw_c2_line((c2_t){pa.x,fun(pa.x)},(c2_t){pa.x+1.0,fun(pa.x+1.0)});
+ }
+}
+
+c2_t rotate_c2(c2_t p1,c2_t p2,real dr) {
+  c2_t p3;
+  real d=distance2(p1,p2);
+  real r=points_to_angle(p1,p2);
+  r=r+dr;
+  p3.x=(sinl(r) * d) + p2.x;
+  p3.y=(cosl(r) * d) + p2.y;
+  return p3;
+}
+
+c3_t rotate_c3_xr(c3_t p1,c3_t p2,real xr) {//rotate y and z around camera based on xr (looking up and down)
+  c2_t tmp;
+  tmp=rotate_c2((c2_t){p1.y,p1.z},(c2_t){p2.y,p2.z},xr);
+  return (c3_t){p1.x,tmp.x,tmp.y};
+}
+c3_t rotate_c3_yr(c3_t p1,c3_t p2,real yr) {//rotate x and z around camera based on yr (looking left and right)
+  c2_t tmp;
+  tmp=rotate_c2((c2_t){p1.x,p1.z},(c2_t){p2.x,p2.z},yr);
+  return (c3_t){tmp.x,p1.y,tmp.y};
+}
+c3_t rotate_c3_zr(c3_t p1,c3_t p2,real zr) {//rotate x and y around camera based on zr (cocking your head to a side)
+  c2_t tmp;
+  tmp=rotate_c2((c2_t){p1.x,p1.y},(c2_t){p2.x,p2.y},zr);
+  return (c3_t){tmp.x,tmp.y,p1.z};
+}
+
+void rotate_shape_yr(struct c3_shape *s) {//changes input value!
+ int i=0;
+ for(i=0;i<s->len+(s->len==1);i++) s->p[0]=rotate_c3_yr(s->p[0],camera.p,camera.yr);
+}
+
+c2_t c3_to_c2(c3_t p3) { //DO NOT DRAW STUFF IN HERE
+  c2_t p2;
+//  c3_t tmp1;
+//  c3_t tmp2;
+//  c3_t tmp3;
+  c3_t final;
+//these rotations need to be about the previous axis after the axis itself has been rotated.
+//  final=rotate_c3_yr(p3,camera.p,d2r(camera.yr));//rotate everything around the camera's location.
+  final=rotate_c3_yr(p3,(c3_t){0,0,0},d2r(camera.yr));//rotate everything around the center no matter what.
+//  tmp2=rotate_c3_xr(tmp1,camera.p,d2r(camera.xr));
+//  final=rotate_c3_zr(tmp2,camera.p,d2r(camera.zr));
+  real delta_x=(camera.p.x - final.x);
+  real delta_y=(camera.p.y - final.y);
+  real delta_z=(camera.p.z - final.z);
+//  real d=distance3(camera.p,final);
+  p2.y=camera.zoom * (delta_y * MAGIC(delta_z) - delta_y);
+  p2.x=camera.zoom * (delta_x * MAGIC(delta_z) - delta_x);
+  return p2;
+}
+
+void draw_c3_line(c3_t p1,c3_t p2) {
+// if(!between_angles(points_to_angle((c2_t){camera.p.x,camera.p.z},(c2_t){p1.x,p1.z}),0,90) ||
+//    !between_angles(points_to_angle((c2_t){camera.p.x,camera.p.z},(c2_t){p2.x,p2.z}),0,90)) return;
+ if(global.drawminimap == 1) {
+  draw_c2_line((c2_t){(camera.p.x-2)*global.mmz,(camera.p.z+2)*global.mmz},(c2_t){(camera.p.x+2)*global.mmz,(camera.p.z-2)*global.mmz});
+  draw_c2_line((c2_t){(camera.p.x+2)*global.mmz,(camera.p.z+2)*global.mmz},(c2_t){(camera.p.x-2)*global.mmz,(camera.p.z-2)*global.mmz});
+  draw_c2_line((c2_t){p1.x*global.mmz,p1.z*global.mmz},(c2_t){p2.x*global.mmz,p2.z*global.mmz});
+ }
+ if(global.drawminimap == 2) {//map rotates.
+  c3_t t1=rotate_c3_yr(p1,camera.p,d2r(camera.yr));
+  c3_t t2=rotate_c3_yr(p2,camera.p,d2r(camera.yr));
+  draw_c2_line((c2_t){t1.x*global.mmz,t1.z*global.mmz},(c2_t){t2.x*global.mmz,t2.z*global.mmz});
+ }
+ if(global.draw3d != 0) draw_c2_line(c3_to_c2(p1),c3_to_c2(p2));
+ if(global.debug) {
+  
+ }
+}
+
+cs_t c3_to_cs(c3_t p) {
+ return c2_to_cs(c3_to_c2(p));
+}
+
+real shitdist2(c3_t p1,c3_t p2) {
+ return sqrtl(((p1.x - p2.x) * (p1.x - p2.x)) +
+        ((p1.y - p2.y) * (p1.y - p2.y)) +
+        ((p1.z - p2.z) * (p1.z - p2.z)));
+}
+
+real shitdist(struct c3_shape s,c3_t p) {
+// apply rotation then find distance?
+ int i;
+ struct c3_shape s_;
+ real total;
+ s_=s;
+ rotate_shape_yr(&s_);
+ for(i=0;i<s_.len+(s_.len==1);i++) {
+  total+=shitdist2(s_.p[i],camera.p);
+ }
+ return (total) / (real)(s_.len+(s_.len==1));
+}
+
+
+void HatchLines(c2_t p1,c2_t p2,c2_t p3,int density) {
+ real i=0;
+ for(i=1;i<density;i=i+1) {//only need 1/2, not 0/2 and 2/2, those are edges of the triangle.
+  draw_c2_line(
+   (c2_t){((i*p1.x)+((density-i)*p3.x))/density,
+          ((i*p1.y)+((density-i)*p3.y))/density},
+   (c2_t){((i*p2.x)+((density-i)*p3.x))/density,
+          ((i*p2.y)+((density-i)*p3.y))/density}
+  );
+ }
+}
+
+/*void DrawHatchedTriangle(struct c3_triangle t,int d) {
+ c2_t p1,p2,p3;
+ p1=c3_to_c2(t.p1);
+ p2=c3_to_c2(t.p2);
+ p3=c3_to_c2(t.p3);
+ HatchLines(p1,p2,p3,d);
+ HatchLines(p2,p3,p1,d);
+ HatchLines(p1,p3,p2,d);
+}*/
+
+//^ subdivision algorithm for display purposes only.
+//black out the rest of the triangle first?
+//sounds alright to me...
+
+void draw_cs_text(cs_t p,char *text) {
+ char t[256];
+ int direction,ascent,descent;
+ XFontStruct *font=XLoadQueryFont(global.dpy,"fixed");
+ XCharStruct overall;
+ snprintf(t,sizeof(t)-1,"%s",text);
+ XTextExtents(font,text,strlen(text),&direction,&ascent,&descent,&overall);
+ XDrawString(global.dpy,global.backbuffer,global.backgc,p.x,p.y+(descent+ascent),text,strlen(text));
+}
+
+void draw_c2_text(c2_t p,char *text) {
+ cs_t p2=c2_to_cs(p);
+ draw_cs_text(p2,text);
+}
+
+void draw_c3_text(c3_t p,char *text) {
+ cs_t p2=c3_to_cs(p);
+ draw_cs_text(p2,text);
+}
+
+/*
+cs_t *c3s_to_css(c3_t *p3,int len) {
+ cs_t *ps=malloc(sizeof(cs_t) * len);
+ int i;
+ for(i=0;i<len;i++) ps[i]=c3_to_cs(p3[i]);
+ return ps;
+}*/
+
+void draw_c3_shape(struct c3_shape s) {
+// char line[1024];
+ int i=0;
+ int w,h;
+ XPoint p[s.len+(s.len==1)];
+ cs_t tmp;
+ for(i=0;i<s.len+(s.len==1);i++) {
+  tmp=c3_to_cs(s.p[i]);
+  p[i]=(XPoint){tmp.x,tmp.y};
+ }
+ if(global.draw3d == 1) { // wireframe
+  switch(s.len) {
+   case 1:
+    w=max(p[0].x,p[1].x)-min(p[0].x,p[1].x);
+    h=max(p[0].y,p[1].y)-min(p[0].y,p[1].y);
+    p[0].x-=h;
+    p[0].y-=h;
+    XDrawArc(global.dpy,global.backbuffer,global.backgc,p[0].x,p[0].y,h*2,h*2,0,360*64);
+    break;
+   case 2:
+    XDrawLine(global.dpy,global.backbuffer,global.backgc,p[0].x,p[0].y,p[1].x,p[1].y);
+    break;
+   default:
+    for(i=0;i<s.len;i++) {
+     XDrawLines(global.dpy,global.backbuffer,global.backgc,p,s.len,CoordModeOrigin);
+    }
+    break;
+  }
+ }
+ if(global.draw3d == 2) { //draw it filled in
+  switch(s.len) {
+   case 1:
+    w=max(p[0].x,p[1].x)-min(p[0].x,p[1].x);
+    h=max(p[0].y,p[1].y)-min(p[0].y,p[1].y);
+    p[0].x-=h;
+    p[0].y-=h;
+    XFillArc(global.dpy,global.backbuffer,global.backgc,p[0].x,p[0].y,h*2,h*2,0,360*64);
+    break;
+   case 2:
+    XDrawLine(global.dpy,global.backbuffer,global.backgc,p[0].x,p[0].y,p[1].x,p[1].y);
+    break;
+   default:
+    XFillPolygon(global.dpy,global.backbuffer,global.backgc,p,s.len,Convex,CoordModeOrigin);
+    break;
+  }
+ }
+// if(global.draw3d == 3) { //hashed
+//  XSetForeground(global.dpy, global.backgc, global.colors[0].pixel);
+  //XDrawFilledShape(c3_to_cs(t.p1),c3_to_cs(t.p2),c3_to_cs(t.p3));//clear out this triangle.
+//  XSetForeground(global.dpy, global.backgc, global.green.pixel);
+  //upgrade me! DrawHatchedTriangle(t,10 - (shitdist(t,camera.p) / 10));//how to get density?
+// }
+/* if(global.debug) {
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p1.x,t.p1.y,t.p1.z);
+  draw_c3_text(t.p1,line);
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p2.x,t.p2.y,t.p2.z);
+  draw_c3_text(t.p2,line);
+  snprintf(line,sizeof(line)-1,"(%Lf,%Lf,%Lf)",t.p3.x,t.p3.y,t.p3.z);
+  draw_c3_text(t.p3,line);
+*/
+// }
+}
+
+typedef struct {
+ struct c3_shape *s;
+ real d;
+} zsort_t;
+
+int compar(zsort_t *a,zsort_t *b) {
+ return ((a->d) > (b->d));
+}
+
+
+/*
+void draw_c3_point_text(c3_t p,char *text) {
+ char coords[256];
+ int direction,ascent,descent;
+ cs_t p2;
+ p2=c3_to_cs(p);
+ snprintf(coords,sizeof(coords)-1,"(%Lf,%Lf,%Lf)",p.x,p.y,p.z);
+ XTextExtents(font,text,strlen(text),&direction,&ascent,&descent,&overall);
+ XDrawString(global.dpy,global.backbuffer,global.backgc,p2.x,p2.y+(descent+ascent),coords,strlen(coords));
+}*/
+
+void draw_screen(Display *dpy,Window w,GC gc) {
+  int i;
+  int colori=100;
+  int cn=0;//camera number.
+  XFontStruct *font=XLoadQueryFont(global.dpy,"fixed");
+  XCharStruct overall;
+  int direction,ascent,descent;
+  char coords[256];
+  XGCValues gcval;
+  zsort_t zs[SHAPES];
+  XCopyArea(global.dpy,global.cleanbackbuffer,global.backbuffer,gc,0,0,global.width,global.height,0,0);//clear the backbuffer.
+//  XCopyPlane(global.dpy,global.cleanbackbuffer,global.backbuffer,gc,0,0,global.width,global.height,0,0,1);//clear the backbuffer.
+
+  XRectangle cliprect;
+  cliprect.x=0;
+  cliprect.y=0;
+  cliprect.width=global.width/global.split_screen;
+  cliprect.height=global.height;
+
+  real oldx=camera.p.x;
+  real oldz=camera.p.z;
+  if(global.split_screen > 1) {
+   camera.p.z-=(global.split_flip)*((global.split/global.split_screen)*cosl(d2r(camera.yr+180)));
+   camera.p.x-=(global.split_flip)*((global.split/global.split_screen)*sinl(d2r(camera.yr+180)));
+  }
+  for(cn=0;cn<global.split_screen;cn++) {
+    if(global.red_and_blue) {
+     //set color for left half to red and right half to blue
+     //and draw mode for the gc to GXOr
+     global.xoff=0;
+     gcval.function=GXor;
+     XChangeGC(global.dpy,global.backgc,GCFunction,&gcval);
+    } else {
+     global.xoff=(global.width/global.split_screen)*cn;
+    }
+    if(!global.red_and_blue) XSetClipRectangles(global.dpy,global.backgc,global.xoff,0,&cliprect,1,Unsorted);
+    //if(global.drawminimap == 3) { draw_graph(magic); continue; }
+    if(global.drawsky) {
+     XCopyArea(global.dpy,skypixmap,global.backbuffer,global.backgc,((camera.yr*5)+SKYW)%SKYW,0,WIDTH,global.height/2,0,0);
+    }
+    if(global.draw3d) {
+//      draw_c2_line((c2_t){LEFT,0},(c2_t){RIGHT,0}); //horizon
+    }
+    if(time(0) == global.oldtime) {
+     global.fps++;
+    }
+    else {
+     global.oldtime=time(0);
+     global.oldfps=global.fps;
+     global.fps=0;
+    }
+    //XSetForeground(global.dpy, global.backgc, global.green.pixel);
+    if(global.debug) {
+      snprintf(coords,sizeof(coords)-1,"debug: %s minimap: %d 3d: %d fps: %d shapes: %d",global.debug?"on":"off",global.drawminimap,global.draw3d,global.oldfps,global.shapes);
+      XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+      XDrawString(global.dpy,global.backbuffer,global.backgc,global.xoff,global.height/2+(descent+0+ascent)*1,coords,strlen(coords));
+      snprintf(coords,sizeof(coords)-1,"x: %d y: %d",global.mousex,global.mousey);
+      XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+      XDrawString(global.dpy,global.backbuffer,global.backgc,global.xoff,global.height/2+(descent+0+ascent)*2,coords,strlen(coords));
+      snprintf(coords,sizeof(coords)-1,"cx: %Lf cy: %Lf cz: %Lf",camera.p.x,camera.p.y,camera.p.z);
+      XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+      XDrawString(global.dpy,global.backbuffer,global.backgc,global.xoff,global.height/2+(descent+0+ascent)*3,coords,strlen(coords));
+      snprintf(coords,sizeof(coords)-1,"xr: %d yr: %d zr: %d",camera.xr,camera.yr,camera.zr);
+      XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+      XDrawString(global.dpy,global.backbuffer,global.backgc,global.xoff,global.height/2+(descent+0+ascent)*4,coords,strlen(coords));
+    }
+
+//  if(global.drawminimap) {//this isn't even useful I guess.
+   //cx1=(sinl(d2r(camera.yr+270))*7l);
+   //cy1=(cosl(d2r(camera.yr+270))*7l);
+   //cx2=(sinl(d2r(camera.yr+90))*7l);
+   //cy2=(cosl(d2r(camera.yr+90))*7l);
+//   draw_c2_line((c2_t){0,0},(c2_t){10,10});
+//   draw_c2_line((c2_t){0,0},(c2_t){-10,10});
+//   draw_c2_line((c2_t){10,10},(c2_t){-10,10});
+//  }
+
+/* cube
+   draw_c3_line((c3_t){-3,0,-3},(c3_t){-3,0,3});
+   draw_c3_line((c3_t){-3,0,-3},(c3_t){-3,6,-3});
+   draw_c3_line((c3_t){-3,0,-3},(c3_t){3,0,-3});
+
+   draw_c3_line((c3_t){3,6,3},(c3_t){3,6,-3});
+   draw_c3_line((c3_t){3,6,3},(c3_t){-3,6,3});
+   draw_c3_line((c3_t){3,6,3},(c3_t){3,0,3});
+
+   draw_c3_line((c3_t){-3,0,3},(c3_t){3,0,3});
+   draw_c3_line((c3_t){-3,0,3},(c3_t){-3,6,3});
+
+   draw_c3_line((c3_t){-3,6,-3},(c3_t){-3,6,3});
+   draw_c3_line((c3_t){-3,6,-3},(c3_t){3,6,-3});
+
+   draw_c3_line((c3_t){3,0,-3},(c3_t){3,0,3});
+   draw_c3_line((c3_t){3,0,-3},(c3_t){3,6,-3});
+*/
+/*
+   //floor grid
+   for(i=-21;i<21;i+=3) {
+    for(j=-21;j<21;j+=3) {
+     //draw_c3_triangle((struct c3_triangle){"id",(c3_t){i,0,j},(c3_t){i,0,j+3},(c3_t){i+3,0,j}});
+     draw_c3_line((c3_t){i,0,j},(c3_t){i,0,j+3});
+     draw_c3_line((c3_t){i,0,j},(c3_t){i+3,0,j});
+    }
+   }
+*/
+   //apply rotation?
+   // load up the triangles to render... after applying rotation?
+   for(i=0;global.shape[i];i++) {
+    zs[i].s=global.shape[i];
+    //rotate_shape(zs[i].s);
+   }
+   //
+   if(1) {//global.zsort) {
+    for(i=0;global.shape[i];i++) {
+     zs[i].d=shitdist(*(zs[i].s),camera.p);
+    }
+    qsort(&zs,i,sizeof(zs[0]),(__compar_fn_t)compar);//sort these zs structs based on d.
+   }
+   //draw all triangles
+   if(zs[0].s) {
+    strcpy(global.selected_object,zs[0].s->id);
+   }
+   for(i=0;global.shape[i];i++) {
+    //now we pick the color of this triangle!
+    if(global.red_and_blue) {
+     if(cn==0) {
+      XSetForeground(global.dpy,global.backgc,global.red.pixel);
+     } else {
+      XSetForeground(global.dpy,global.backgc,global.blue.pixel);
+     }
+//tests of blending grayscale with red and blue
+//     draw_c3_triangle(*(zs[i].t));
+    } else {
+     if(!strcmp(global.selected_object,zs[i].s->id)) {
+      //XSetForeground(global.dpy,global.backgc,global.green.pixel);
+     } else {
+      if(global.greyscale) {
+       if(zs[i].d > 0) {
+        if(zs[i].d < 100) {
+         colori=zs[i].d;
+        }
+       }
+       colori=(int)(zs[i].d)%100;
+       XSetForeground(global.dpy,global.backgc,global.colors[(int)(100.0-(colori))].pixel);//picking the color here only works if...
+      }
+     }
+    }
+    draw_c3_shape(*(zs[i].s));
+   }
+   XSetForeground(global.dpy, global.backgc, global.green.pixel);
+   if(global.debug) {
+    snprintf(coords,sizeof(coords)-1,"selected object: %s",global.selected_object);
+    XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+    XDrawString(global.dpy,global.backbuffer,global.backgc,global.xoff,global.height/2+(descent+0+ascent)*5,coords,strlen(coords));
+   }
+   camera.p.z+=(global.split_flip)*(global.split*cosl(d2r(camera.yr+180)));
+   camera.p.x+=(global.split_flip)*(global.split*sinl(d2r(camera.yr+180)));
+
+
+  }
+
+//TODO: figure out what all this shit is and either update or remove.
+//DONT USE WIDTH for shit.
+/*
+  x1=nextX(WIDTH/2,HEIGHT/2,d2r(camera.yr),40);
+  y1=nextY(WIDTH/2,HEIGHT/2,d2r(camera.yr),40);
+  x2=nextX(WIDTH/2,HEIGHT/2,d2r(camera.yr+180),80);
+  y2=nextY(WIDTH/2,HEIGHT/2,d2r(camera.yr+180),80);
+  XDrawLine(global.dpy,w,gc,WIDTH/2,HEIGHT/2,x1,y1);
+  XDrawLine(global.dpy,w,gc,WIDTH/2,HEIGHT/2,x2,y2);
+
+  XDrawLine(global.dpy,w,gc,0,HEIGHT/2,WIDTH,HEIGHT/2);
+
+  x1=global.mousex;
+  y1=global.mousey;
+  real a=points_to_angle((c2_t){0,0},cs_to_c2((cs_t){x1,y1}));
+
+  snprintf(coords,sizeof(coords)-1,"%llf",a);
+  XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+  XDrawString(global.dpy,w,gc,global.xoff,(descent+0+ascent)*6,coords,strlen(coords));
+  snprintf(coords,sizeof(coords)-1,"%llf",points_to_angle(cs_to_c2((cs_t){global.mousex,global.mousey}),(c2_t){0,0})+(M_PIl/2));
+  XTextExtents(font,coords,strlen(coords),&direction,&ascent,&descent,&overall);
+  XDrawString(global.dpy,w,gc,global.xoff,(descent+0+ascent)*7,coords,strlen(coords));
+  XDrawLine(global.dpy,w,gc,global.mousex,global.mousey,global.width/2,global.height/2);
+
+  real c=cosl(d2r(camera.yr) - a) * distance((c2_t){x1,y1},(c2_t){WIDTH/2,HEIGHT/2});
+  x2=nextX(x1,y1,d2r(camera.yr-90),c);
+  y2=nextY(x1,y1,d2r(camera.yr-90),c);
+  XDrawLine(global.dpy,w,gc,x1,y1,x2,y2);
+*/
+  camera.p.x = oldx;
+  camera.p.z = oldz; //-= cn*CAMERA_SEPARATION;
+//  XClearWindow(global.dpy, w);
+  XCopyArea(global.dpy,global.backbuffer,w,gc,0,0,global.width,global.height,0,0);//move backbuffer to window
+//  XCopyPlane(global.dpy,global.backbuffer,w,gc,0,0,global.width,global.height,0,0,0x000100);//move backbuffer to window
+}
+
+#endif
+
+#ifdef GRAPHICAL
+void set_aspect_ratio() {
+ XSizeHints *hints=XAllocSizeHints();
+ hints->min_aspect.x=4*(global.split_screen / (global.red_and_blue ? global.split_screen : 1));
+ hints->min_aspect.y=3;
+ hints->max_aspect.x=4*(global.split_screen / (global.red_and_blue ? global.split_screen : 1));
+ hints->max_aspect.y=3;
+ hints->flags=PAspect;
+ XSetWMNormalHints(global.dpy,global.w,hints);
+}
+#endif
+
+#ifdef GRAPHICAL
+//push a string back into stdin so it can be read by the file loader. :P
+int selfcommand(char *s) {
+ char t;
+ if(!strlen(s)) return 0;
+ ungetc(s[strlen(s)-1],stdin);
+ t=s[strlen(s)-1];
+ s[strlen(s)-1]=0;
+ selfcommand(s);
+ putchar(t);
+ return 0;
+}
+
+int keypress_handler(int sym) {
+  char line[1024];
+  real tmpx;
+//  real tmpy; //unused atm
+  real tmpz;
+  switch(sym) {
+   case XK_Return:
+    snprintf(line,sizeof(line)-1,"%s action %s\n",global.user,global.selected_object);
+    selfcommand(line);
+    break;
+   case XK_Up:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+90));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+90));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Down:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+270));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+270));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Left:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_Right:
+    tmpx=WALK_SPEED*sinl(d2r(camera.yr+180));
+    tmpz=WALK_SPEED*cosl(d2r(camera.yr+180));
+    camera.p.x+=tmpx;
+    camera.p.z+=tmpz;
+    snprintf(line,sizeof(line)-1,"%s move %Lf 0 %Lf 0 0 0 0 0 0\n",global.user,tmpx,tmpz);
+    selfcommand(line);
+    break;
+   case XK_w:
+    camera.p.y+=1;
+    snprintf(line,sizeof(line)-1,"%s move 0 1 0 0 0 0 0 0 0\n",global.user);
+    selfcommand(line);
+    break;
+   case XK_s:
+    camera.p.y-=1;
+    snprintf(line,sizeof(line)-1,"%s move 0 -1 0 0 0 0 0 0 0\n",global.user);
+    selfcommand(line);
+    break;
+   case XK_r:
+    camera.xr+=5;
+    while(camera.xr > 360) camera.xr-=360;
+    break;
+   case XK_y:
+    camera.xr-=5;
+    while(camera.xr < 0) camera.xr+=360;
+    break;
+   case XK_q:
+    camera.yr+=5;
+    while(camera.yr > 360) camera.yr-=360;
+    break;
+   case XK_e:
+    camera.yr-=5;
+    while(camera.yr < 0) camera.yr+=360;
+    break;
+   case XK_u:
+    camera.zr+=5;
+    while(camera.zr > 360) camera.zr-=360;
+    break;
+   case XK_o:
+    camera.zr-=5;
+    while(camera.zr < 0) camera.zr+=360;
+    break;
+   case XK_z: camera.zoom+=1; break;
+   case XK_x: camera.zoom-=1; break;
+   case XK_c: global.mmz*=1.1; break;
+   case XK_v: global.mmz/=1.1; break;
+   case XK_h: global.split+=1; break;
+   case XK_j: global.split-=1; break;
+   case XK_d:
+    global.debug ^= 1;
+    break;
+   case XK_f:
+    global.derp ^= 1;
+    break;
+   case XK_m:
+    global.drawminimap += 1;
+    global.drawminimap %= 4;
+    break;
+   case XK_a:
+    global.drawsky ^= 1;
+    break;
+   case XK_3:
+    global.draw3d += 1;
+    global.draw3d %= 4;
+    break;
+   case XK_Escape:
+    return -1;
+   default:
+    return 0;
+    break;
+ }
+ return 1;
+}
+#endif
+
+int main(int argc,char *argv[]) {
+#ifdef GRAPHICAL
+  Cursor cursor;
+  XEvent e;
+  XSetWindowAttributes attributes;
+  Window root,child;//why do I have this?
+//  XColor toss;
+#endif
+  int i,j;
+  char tmp[64];
+  unsigned int mask;
+  char redraw=0;
+  if(argc < 2) {
+   fprintf(stderr,"usage: hackvr yourname < from_others > to_others\n");
+   return 1;
+  } else {
+   global.user=strdup(argv[1]);
+  }
+  fcntl(1,F_SETFL,O_NONBLOCK);//won't work
+  setbuf(stdin,0);
+  setbuf(stdout,0);
+#ifdef GRAPHICAL
+  printf("# Opening X Display... (%s)\n",getenv("DISPLAY"));
+  if((global.dpy = XOpenDisplay(0)) == NULL) return printf("# failure.\n"),2;
+  else printf("# done.\n");
+  global.color_map=DefaultColormap(global.dpy, DefaultScreen(global.dpy));
+
+  printf("# generating grays...\n");
+  for(i=0;i<=100;i++) {
+   snprintf(tmp,sizeof(tmp),"gray%d",i);
+   XAllocNamedColor(global.dpy,global.color_map,tmp,&global.colors[i],&global.colors[i]);
+  }
+  printf("# done.\n");
+  assert(global.dpy);
+  global.split_screen=SPLIT_SCREEN;
+  global.split_flip=-1;
+  global.split=5;
+  global.root_window=0;
+  global.red_and_blue=RED_AND_BLUE;
+  //global.colors[0]=BlackPixel(global.dpy,DefaultScreen(global.dpy));
+//  int whiteColor = //WhitePixel(global.dpy, DefaultScreen(global.dpy));
+  attributes.background_pixel=global.colors[0].pixel;
+  if(global.root_window) {
+   global.w = DefaultRootWindow(global.dpy); //this is still buggy.
+  } else {
+   global.w = XCreateWindow(global.dpy,DefaultRootWindow(global.dpy),0,0,WIDTH*(global.split_screen / (global.red_and_blue ? global.split_screen : 1)),HEIGHT,1,DefaultDepth(global.dpy,DefaultScreen(global.dpy)),InputOutput,DefaultVisual(global.dpy,DefaultScreen(global.dpy))\
+                    ,CWBackPixel, &attributes);
+   set_aspect_ratio();
+   XSelectInput(global.dpy, global.w, PointerMotionMask|StructureNotifyMask|ButtonPressMask|ButtonReleaseMask|KeyPressMask|ExposureMask);
+  }
+  XMapWindow(global.dpy, global.w);
+  XStoreName(global.dpy,global.w,"hackvr");
+  global.greyscale=1;
+  global.zsort=1;
+  global.shape[0]=0;//we'll allocate as we need more.
+  global.gc=XCreateGC(global.dpy, global.w, 0, 0);
+
+  if(global.red_and_blue) {
+   global.width=WIDTH;
+  } else {
+   global.width=WIDTH*global.split_screen;
+  }
+  global.height=HEIGHT;
+
+  global.backbuffer=XCreatePixmap(global.dpy,global.w,global.width,global.height,DefaultDepth(global.dpy,DefaultScreen(global.dpy)));
+  global.cleanbackbuffer=XCreatePixmap(global.dpy,global.w,global.width,global.height,DefaultDepth(global.dpy,DefaultScreen(global.dpy)));
+
+  global.fps=0;
+  global.oldfps=0;
+  global.oldtime=0;
+//backbuffer is uninitialized
+  global.backgc=XCreateGC(global.dpy,global.backbuffer,0,0);
+
+  cursor=XCreateFontCursor(global.dpy,XC_crosshair);
+  XDefineCursor(global.dpy, global.w, cursor);
+
+  XAllocNamedColor(global.dpy, global.color_map, "green", &global.green, &global.green);
+  XAllocNamedColor(global.dpy, global.color_map, "red", &global.red, &global.red);
+  XAllocNamedColor(global.dpy, global.color_map, "blue", &global.blue, &global.blue);
+  XAllocNamedColor(global.dpy, global.color_map, "red", &global.redblue[0], &global.redblue[0]);
+  XAllocNamedColor(global.dpy, global.color_map, "blue", &global.redblue[1], &global.redblue[1]);
+  XSetForeground(global.dpy, global.gc, global.green.pixel);
+  XSetForeground(global.dpy, global.backgc, global.colors[0].pixel);//black. we're about to draw the blank background using this.
+  XSetBackground(global.dpy, global.gc, global.colors[160].pixel);
+  XSetBackground(global.dpy, global.backgc, global.colors[140].pixel);
+
+  XFillRectangle(global.dpy,global.cleanbackbuffer,global.backgc,0,0,global.width,global.height);
+  XSetForeground(global.dpy, global.backgc, global.green.pixel);
+
+//  XSetForeground(global.dpy, gc, whiteColor);
+// this was taking a "long" time.
+  printf("# generating sky... ");
+  skypixmap=XCreatePixmap(global.dpy,global.w,SKYW,SKYH,DefaultDepth(global.dpy,DefaultScreen(global.dpy)));
+  for(i=0;i<SKYH;i++) {
+   for(j=0;j<SKYW;j++) {
+    if(i==0) sky[i][j]=rand()%2;
+    else {
+     sky[i][j]=(SKYRULE >> ((!!sky[i-1][(j+(SKYW)-1)%(SKYW)]<<2) | (!!sky[i-1][j]<<1) | (!!sky[i-1][j+1%(SKYW)])) & 1);
+     if(sky[i][j]) {
+      XDrawPoint(global.dpy,skypixmap,global.backgc,j,i);
+     }
+    }
+   }
+  }
+  printf("done.\n");
+
+  global.mapxoff=global.width/2;
+  global.mapyoff=global.height/2;
+  global.drawminimap=0;
+  global.draw3d=1;
+  global.force_redraw=1;//use this for checking proper fps I guess.
+  camera.zoom=30.0l;
+  camera.xr=270;
+  camera.yr=270;
+  camera.zr=0;
+  global.mmz=1;
+  camera.p.x=0;
+  camera.p.z=6;
+  camera.p.y=5;
+#endif
+  global.debug=0;
+  printf("# entering main loop\n");
+  for(;;) {
+    redraw=global.force_redraw;
+#ifdef GRAPHICAL
+    while(XPending(global.dpy)) {//these are taking too long?
+     XNextEvent(global.dpy, &e);
+//     printf("# handling event with type: %d\n",e.type);
+     switch(e.type) {
+//       case Expose:
+//         if(e.xexpose.count == 0) redraw=1;
+//         break;
+       case MotionNotify:
+         redraw=1;
+         XQueryPointer(global.dpy,global.w,&root,&child,&global.rmousex,&global.rmousey,&global.mousex,&global.mousey,&mask);
+         break;
+       case ButtonPress:
+         redraw=1;
+         global.buttonpressed=e.xbutton.button;
+         break;
+       case ButtonRelease:
+         redraw=1;
+         global.buttonpressed=0;
+         break;
+       case ConfigureNotify:
+         redraw=1;
+         XGetGeometry(global.dpy,global.w,&root,&global.x,&global.y,&global.width,&global.height,&global.border_width,&global.depth);
+         if(global.width / (global.split_screen / (global.red_and_blue ? global.split_screen : 1 )) / 4 * 3 != global.height) {
+          if(global.height * 3 / 4 == global.height) {
+           printf("math doesn't work.\n");
+          }
+          printf("# DERPY WM CANT TAKE A HINT %d / %d / 4 * 3 = %d != %d\n",global.width,global.split_screen,global.width /global.split_screen /4 * 3,global.height);
+          if(global.width / (global.split_screen / (global.red_and_blue ? global.split_screen : 1)) / 4 * 3 < global.height) {
+           global.height=global.width / (global.split_screen / (global.red_and_blue ? global.split_screen : 1)) / 4 * 3;
+          } else {
+           global.width=global.height * 3 / 4 * (global.split_screen / (global.red_and_blue ? global.split_screen : 1));
+          }
+         }
+         global.mapxoff=global.width/(global.split_screen / (global.red_and_blue ? global.split_screen : 1))/2;
+         global.mapyoff=global.height/2;
+         break;
+       case KeyPress:
+         redraw=1;
+         if(keypress_handler(XLookupKeysym(&e.xkey,0)) == -1) {
+          printf("# exiting\n");
+          return 0;
+         }
+         break;
+       default:
+         //printf("# received event with type: %d\n",e.type);
+         break;
+     }
+    }
+    if(redraw && !global.headless) {
+     draw_screen(global.dpy,global.w,global.gc);
+    }
+#endif
+    switch(load_stdin()) {
+     case -1:
+      return 0;
+      break;
+     case 0:
+      break;
+     default:
+      redraw=1;
+      break;
+    }
+  }
+  return 0;
+}