/* hypertorus --- Shows a hypertorus that rotates in 4d */
#if 0
-static const char sccsid[] = "@(#)hypertorus.c 1.1 03/05/18 xlockmore";
+static const char sccsid[] = "@(#)hypertorus.c 1.2 05/09/28 xlockmore";
#endif
-/* Copyright (c) 2003 Carsten Steger <carsten@mirsanmir.org>. */
+/* Copyright (c) 2003-2009 Carsten Steger <carsten@mirsanmir.org>. */
/*
* Permission to use, copy, modify, and distribute this software and its
*
* REVISION HISTORY:
* C. Steger - 03/05/18: Initial version
+ * C. Steger - 05/09/28: Added the spirals appearance mode
+ * and trackball support
+ * C. Steger - 07/01/23: Improved 4d trackball support
+ * C. Steger - 09/08/22: Removed check-config.pl warnings
*/
/*
* projected 3d torus can then be projected to the screen either perspectively
* or orthographically. There are three display modes for the torus: mesh
* (wireframe), solid, or transparent. Furthermore, the appearance of the
- * torus can be as a solid object or as a set of see-through bands. Finally,
- * the colors with with the torus is drawn can be set to either two-sided or
- * to colorwheel. In the first case, the torus is drawn with red on the
- * outside and green on the inside. This mode enables you to see that the
- * torus turns inside-out as it rotates in 4d. The second mode draws the
- * torus in a fully saturated color wheel. This gives a very nice effect
- * when combined with the see-through bands mode. The rotation speed for
- * each of the six planes around which the torus rotates can be chosen.
- * This program is very much inspired by Thomas Banchoff's book "Beyond the
- * Third Dimension: Geometry, Computer Graphics, and Higher Dimensions",
- * Scientific American Library, 1990.
+ * torus can be as a solid object or as a set of see-through bands or
+ * see-through spirals. Finally, the colors with with the torus is drawn can
+ * be set to either two-sided or to colorwheel. In the first case, the torus
+ * is drawn with red on the outside and green on the inside. This mode
+ * enables you to see that the torus turns inside-out as it rotates in 4d.
+ * The second mode draws the torus in a fully saturated color wheel. This
+ * gives a very nice effect when combined with the see-through bands or
+ * see-through spirals mode. The rotation speed for each of the six planes
+ * around which the torus rotates can be chosen. This program is very much
+ * inspired by Thomas Banchoff's book "Beyond the Third Dimension: Geometry,
+ * Computer Graphics, and Higher Dimensions", Scientific American Library,
+ * 1990.
*/
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
-#define DISP_WIREFRAME 0
-#define DISP_WIREFRAME_STR "0"
-#define DISP_SURFACE 1
-#define DISP_SURFACE_STR "1"
-#define DISP_TRANSPARENT 2
-#define DISP_TRANSPARENT_STR "2"
-
-#define APPEARANCE_SOLID 0
-#define APPEARANCE_SOLID_STR "0"
-#define APPEARANCE_BANDS 1
-#define APPEARANCE_BANDS_STR "1"
-
-#define COLORS_TWOSIDED 0
-#define COLORS_TWOSIDED_STR "0"
-#define COLORS_COLORWHEEL 1
-#define COLORS_COLORWHEEL_STR "1"
-
-#define DISP_3D_PERSPECTIVE 0
-#define DISP_3D_PERSPECTIVE_STR "0"
-#define DISP_3D_ORTHOGRAPHIC 1
-#define DISP_3D_ORTHOGRAPHIC_STR "1"
-
-#define DISP_4D_PERSPECTIVE 0
-#define DISP_4D_PERSPECTIVE_STR "0"
-#define DISP_4D_ORTHOGRAPHIC 1
-#define DISP_4D_ORTHOGRAPHIC_STR "1"
-
-#define DALPHA 1.1
-#define DALPHA_STR "1.1"
-#define DBETA 1.3
-#define DBETA_STR "1.3"
-#define DDELTA 1.5
-#define DDELTA_STR "1.5"
-#define DZETA 1.7
-#define DZETA_STR "1.7"
-#define DETA 1.9
-#define DETA_STR "1.9"
-#define DTHETA 2.1
-#define DTHETA_STR "2.1"
-
-#define DEF_DISPLAY_MODE DISP_SURFACE_STR
-#define DEF_APPEARANCE APPEARANCE_BANDS_STR
-#define DEF_COLORS COLORS_COLORWHEEL_STR
-#define DEF_3D_PROJECTION DISP_3D_PERSPECTIVE_STR
-#define DEF_4D_PROJECTION DISP_4D_PERSPECTIVE_STR
-#define DEF_DALPHA DALPHA_STR
-#define DEF_DBETA DBETA_STR
-#define DEF_DDELTA DDELTA_STR
-#define DEF_DZETA DZETA_STR
-#define DEF_DETA DETA_STR
-#define DEF_DTHETA DTHETA_STR
+#define DISP_WIREFRAME 0
+#define DISP_SURFACE 1
+#define DISP_TRANSPARENT 2
+
+#define APPEARANCE_SOLID 0
+#define APPEARANCE_BANDS 1
+#define APPEARANCE_SPIRALS 2
+
+#define COLORS_TWOSIDED 0
+#define COLORS_COLORWHEEL 1
+
+#define DISP_3D_PERSPECTIVE 0
+#define DISP_3D_ORTHOGRAPHIC 1
+
+#define DISP_4D_PERSPECTIVE 0
+#define DISP_4D_ORTHOGRAPHIC 1
+
+#define DEF_DISPLAY_MODE "surface"
+#define DEF_APPEARANCE "bands"
+#define DEF_COLORS "colorwheel"
+#define DEF_PROJECTION_3D "perspective"
+#define DEF_PROJECTION_4D "perspective"
+#define DEF_SPEEDWX "1.1"
+#define DEF_SPEEDWY "1.3"
+#define DEF_SPEEDWZ "1.5"
+#define DEF_SPEEDXY "1.7"
+#define DEF_SPEEDXZ "1.9"
+#define DEF_SPEEDYZ "2.1"
#ifdef STANDALONE
-# define PROGCLASS "Hypertorus"
-# define HACK_INIT init_hypertorus
-# define HACK_DRAW draw_hypertorus
-# define HACK_RESHAPE reshape_hypertorus
-# define hypertorus_opts xlockmore_opts
-# define DEFAULTS "*delay: 25000 \n" \
- "*showFPS: False \n" \
- "*wireframe: False \n" \
- "*displayMode: " DEF_DISPLAY_MODE " \n" \
- "*appearance: " DEF_APPEARANCE " \n" \
- "*colors: " DEF_COLORS " \n" \
- "*projection3d: " DEF_3D_PROJECTION " \n" \
- "*projection4d: " DEF_4D_PROJECTION " \n" \
- "speedwx: " DEF_DALPHA " \n" \
- "speedwy: " DEF_DBETA " \n" \
- "speedwz: " DEF_DDELTA " \n" \
- "speedxy: " DEF_DZETA " \n" \
- "speedxz: " DEF_DETA " \n" \
- "speedyz: " DEF_DTHETA " \n"
+# define DEFAULTS "*delay: 25000 \n" \
+ "*showFPS: False \n" \
+ "*suppressRotationAnimation: True\n" \
+
+# define refresh_hypertorus 0
+# define release_hypertorus 0
# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#ifdef USE_GL
-#include <GL/gl.h>
-#include <GL/glu.h>
+#include "gltrackball.h"
#ifdef USE_MODULES
ModStruct hypertorus_description =
-{"hypertorus", "init_hypertorus", "draw_hypertorus", "release_hypertorus",
+{"hypertorus", "init_hypertorus", "draw_hypertorus", NULL,
"draw_hypertorus", "change_hypertorus", NULL, &hypertorus_opts,
25000, 1, 1, 1, 1.0, 4, "",
"Shows a hypertorus rotating in 4d", 0, NULL};
#endif
+static char *mode;
static int display_mode;
+static char *appear;
static int appearance;
+static int num_spirals;
+static char *color_mode;
static int colors;
+static char *proj_3d;
static int projection_3d;
+static char *proj_4d;
static int projection_4d;
static float speed_wx;
static float speed_wy;
static float speed_xz;
static float speed_yz;
-/* 4D rotation angles */
-static float alpha, beta, delta, zeta, eta, theta;
-static float aspect;
-
-static const float offset4d[4] = {
- 0.0, 0.0, 0.0, 2.0
-};
-
-static const float offset3d[4] = {
- 0.0, 0.0, -2.0, 0.0
-};
+static const float offset4d[4] = { 0.0, 0.0, 0.0, 2.0 };
+static const float offset3d[4] = { 0.0, 0.0, -2.0, 0.0 };
static XrmOptionDescRec opts[] =
{
- {"-mesh", ".hypertorus.displayMode", XrmoptionNoArg,
- (caddr_t)DISP_WIREFRAME_STR },
- {"-surface", ".hypertorus.displayMode", XrmoptionNoArg,
- (caddr_t)DISP_SURFACE_STR },
- {"-transparent", ".hypertorus.displayMode", XrmoptionNoArg,
- (caddr_t)DISP_TRANSPARENT_STR },
- {"-solid", ".hypertorus.appearance", XrmoptionNoArg,
- (caddr_t)APPEARANCE_SOLID_STR },
- {"-bands", ".hypertorus.appearance", XrmoptionNoArg,
- (caddr_t)APPEARANCE_BANDS_STR },
- {"-twosided", ".hypertorus.colors", XrmoptionNoArg,
- (caddr_t)COLORS_TWOSIDED_STR },
- {"-colorwheel", ".hypertorus.colors", XrmoptionNoArg,
- (caddr_t)COLORS_COLORWHEEL_STR },
- {"-perspective-3d", ".hypertorus.projection3d", XrmoptionNoArg,
- (caddr_t)DISP_3D_PERSPECTIVE_STR },
- {"-orthographic-3d", ".hypertorus.projection3d", XrmoptionNoArg,
- (caddr_t)DISP_3D_ORTHOGRAPHIC_STR },
- {"-perspective-4d", ".hypertorus.projection4d", XrmoptionNoArg,
- (caddr_t)DISP_4D_PERSPECTIVE_STR },
- {"-orthographic-4d", ".hypertorus.projection4d", XrmoptionNoArg,
- (caddr_t)DISP_4D_ORTHOGRAPHIC_STR },
- {"-speed-wx", ".hypertorus.speedwx", XrmoptionSepArg,
- (caddr_t)NULL },
- {"-speed-wy", ".hypertorus.speedwy", XrmoptionSepArg,
- (caddr_t)NULL },
- {"-speed-wz", ".hypertorus.speedwz", XrmoptionSepArg,
- (caddr_t)NULL },
- {"-speed-xy", ".hypertorus.speedxy", XrmoptionSepArg,
- (caddr_t)NULL },
- {"-speed-xz", ".hypertorus.speedxz", XrmoptionSepArg,
- (caddr_t)NULL },
- {"-speed-yz", ".hypertorus.speedyz", XrmoptionSepArg,
- (caddr_t)NULL }
+ {"-mode", ".displayMode", XrmoptionSepArg, 0 },
+ {"-wireframe", ".displayMode", XrmoptionNoArg, "wireframe" },
+ {"-surface", ".displayMode", XrmoptionNoArg, "surface" },
+ {"-transparent", ".displayMode", XrmoptionNoArg, "transparent" },
+ {"-appearance", ".appearance", XrmoptionSepArg, 0 },
+ {"-solid", ".appearance", XrmoptionNoArg, "solid" },
+ {"-bands", ".appearance", XrmoptionNoArg, "bands" },
+ {"-spirals-1", ".appearance", XrmoptionNoArg, "spirals-1" },
+ {"-spirals-2", ".appearance", XrmoptionNoArg, "spirals-2" },
+ {"-spirals-4", ".appearance", XrmoptionNoArg, "spirals-4" },
+ {"-spirals-8", ".appearance", XrmoptionNoArg, "spirals-8" },
+ {"-spirals-16", ".appearance", XrmoptionNoArg, "spirals-16" },
+ {"-twosided", ".colors", XrmoptionNoArg, "twosided" },
+ {"-colorwheel", ".colors", XrmoptionNoArg, "colorwheel" },
+ {"-perspective-3d", ".projection3d", XrmoptionNoArg, "perspective" },
+ {"-orthographic-3d", ".projection3d", XrmoptionNoArg, "orthographic" },
+ {"-perspective-4d", ".projection4d", XrmoptionNoArg, "perspective" },
+ {"-orthographic-4d", ".projection4d", XrmoptionNoArg, "orthographic" },
+ {"-speed-wx", ".speedwx", XrmoptionSepArg, 0 },
+ {"-speed-wy", ".speedwy", XrmoptionSepArg, 0 },
+ {"-speed-wz", ".speedwz", XrmoptionSepArg, 0 },
+ {"-speed-xy", ".speedxy", XrmoptionSepArg, 0 },
+ {"-speed-xz", ".speedxz", XrmoptionSepArg, 0 },
+ {"-speed-yz", ".speedyz", XrmoptionSepArg, 0 }
};
static argtype vars[] =
{
- { &display_mode, "displayMode", "DisplayMode",
- DEF_DISPLAY_MODE, t_Int },
- { &appearance, "appearance", "Appearance",
- DEF_APPEARANCE, t_Int },
- { &colors, "colors", "Colors",
- DEF_COLORS, t_Int },
- { &projection_3d, "projection3d", "Projection3d",
- DEF_3D_PROJECTION, t_Int },
- { &projection_4d, "projection4d", "Projection4d",
- DEF_4D_PROJECTION, t_Int },
- { &speed_wx, "speedwx", "Speedwx",
- DEF_DALPHA, t_Float},
- { &speed_wy, "speedwy", "Speedwy",
- DEF_DBETA, t_Float},
- { &speed_wz, "speedwz", "Speedwz",
- DEF_DDELTA, t_Float},
- { &speed_xy, "speedxy", "Speedxy",
- DEF_DZETA, t_Float},
- { &speed_xz, "speedxz", "Speedxz",
- DEF_DETA, t_Float},
- { &speed_yz, "speedyz", "Speedyz",
- DEF_DTHETA, t_Float}
+ { &mode, "displayMode", "DisplayMode", DEF_DISPLAY_MODE, t_String },
+ { &appear, "appearance", "Appearance", DEF_APPEARANCE, t_String },
+ { &color_mode, "colors", "Colors", DEF_COLORS, t_String },
+ { &proj_3d, "projection3d", "Projection3d", DEF_PROJECTION_3D, t_String },
+ { &proj_4d, "projection4d", "Projection4d", DEF_PROJECTION_4D, t_String },
+ { &speed_wx, "speedwx", "Speedwx", DEF_SPEEDWX, t_Float},
+ { &speed_wy, "speedwy", "Speedwy", DEF_SPEEDWY, t_Float},
+ { &speed_wz, "speedwz", "Speedwz", DEF_SPEEDWZ, t_Float},
+ { &speed_xy, "speedxy", "Speedxy", DEF_SPEEDXY, t_Float},
+ { &speed_xz, "speedxz", "Speedxz", DEF_SPEEDXZ, t_Float},
+ { &speed_yz, "speedyz", "Speedyz", DEF_SPEEDYZ, t_Float}
};
static OptionStruct desc[] =
{
- { "-mesh", "display the torus as a wireframe mesh" },
+ { "-wireframe", "display the torus as a wireframe mesh" },
{ "-surface", "display the torus as a solid surface" },
{ "-transparent", "display the torus as a transparent surface" },
{ "-solid", "display the torus as a solid object" },
{ "-bands", "display the torus as see-through bands" },
+ { "-spirals-{1,2,4,8,16}", "display the torus as see-through spirals" },
{ "-twosided", "display the torus with two colors" },
{ "-colorwheel", "display the torus with a smooth color wheel" },
{ "-perspective-3d", "project the torus perspectively from 3d to 2d" },
{ "-speed-yz <arg>", "rotation speed around the yz plane" }
};
-ModeSpecOpt hypertorus_opts =
+ENTRYPOINT ModeSpecOpt hypertorus_opts =
{sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
typedef struct {
- GLint WindH, WindW;
+ GLint WindH, WindW;
GLXContext *glx_context;
+ /* 4D rotation angles */
+ float alpha, beta, delta, zeta, eta, theta;
+ /* Aspect ratio of the current window */
+ float aspect;
+ /* Trackball states */
+ trackball_state *trackballs[2];
+ int current_trackball;
+ Bool button_pressed;
+
+ float speed_scale;
+
} hypertorusstruct;
static hypertorusstruct *hyper = (hypertorusstruct *) NULL;
}
+/* Compute the rotation matrix m from the rotation angles. */
+static void rotateall(float al, float be, float de, float ze, float et,
+ float th, float m[4][4])
+{
+ int i, j;
+
+ for (i=0; i<4; i++)
+ for (j=0; j<4; j++)
+ m[i][j] = (i==j);
+ rotatewx(m,al);
+ rotatewy(m,be);
+ rotatewz(m,de);
+ rotatexz(m,et);
+ rotatexy(m,ze);
+ rotateyz(m,th);
+}
+
+
+/* Multiply two rotation matrices: o=m*n. */
+static void mult_rotmat(float m[4][4], float n[4][4], float o[4][4])
+{
+ int i, j, k;
+
+ for (i=0; i<4; i++)
+ {
+ for (j=0; j<4; j++)
+ {
+ o[i][j] = 0.0;
+ for (k=0; k<4; k++)
+ o[i][j] += m[i][k]*n[k][j];
+ }
+ }
+}
+
+
+/* Compute a 4D rotation matrix from two unit quaternions. */
+static void quats_to_rotmat(float p[4], float q[4], float m[4][4])
+{
+ double al, be, de, ze, et, th;
+ double r00, r01, r02, r12, r22;
+
+ r00 = 1.0-2.0*(p[1]*p[1]+p[2]*p[2]);
+ r01 = 2.0*(p[0]*p[1]+p[2]*p[3]);
+ r02 = 2.0*(p[2]*p[0]-p[1]*p[3]);
+ r12 = 2.0*(p[1]*p[2]+p[0]*p[3]);
+ r22 = 1.0-2.0*(p[1]*p[1]+p[0]*p[0]);
+
+ al = atan2(-r12,r22)*180.0/M_PI;
+ be = atan2(r02,sqrt(r00*r00+r01*r01))*180.0/M_PI;
+ de = atan2(-r01,r00)*180.0/M_PI;
+
+ r00 = 1.0-2.0*(q[1]*q[1]+q[2]*q[2]);
+ r01 = 2.0*(q[0]*q[1]+q[2]*q[3]);
+ r02 = 2.0*(q[2]*q[0]-q[1]*q[3]);
+ r12 = 2.0*(q[1]*q[2]+q[0]*q[3]);
+ r22 = 1.0-2.0*(q[1]*q[1]+q[0]*q[0]);
+
+ et = atan2(-r12,r22)*180.0/M_PI;
+ th = atan2(r02,sqrt(r00*r00+r01*r01))*180.0/M_PI;
+ ze = atan2(-r01,r00)*180.0/M_PI;
+
+ rotateall(al,be,de,ze,et,-th,m);
+}
+
+
/* Compute a fully saturated and bright color based on an angle. */
static void color(double angle)
{
break;
}
if (display_mode == DISP_TRANSPARENT)
- color[3] = 0.5;
+ color[3] = 0.7;
else
color[3] = 1.0;
glColor3fv(color);
}
-/* Draw a hyperturus projected into 3D. */
-static void hypertorus(double umin, double umax, double vmin, double vmax,
- int numu, int numv)
+/* Draw a hypertorus projected into 3D. Note that the spirals appearance
+ will only work correctly if numu and numv are set to 64 or any higher
+ power of 2. Similarly, the banded appearance will only work correctly
+ if numu and numv are divisible by 4. */
+static int hypertorus(ModeInfo *mi, double umin, double umax, double vmin,
+ double vmax, int numu, int numv)
{
- static GLfloat mat_diff_red[] = { 1.0, 0.0, 0.0, 1.0 };
- static GLfloat mat_diff_green[] = { 0.0, 1.0, 0.0, 1.0 };
- static GLfloat mat_diff_trans_red[] = { 1.0, 0.0, 0.0, 0.5 };
- static GLfloat mat_diff_trans_green[] = { 0.0, 1.0, 0.0, 0.5 };
+ int polys = 0;
+ static const GLfloat mat_diff_red[] = { 1.0, 0.0, 0.0, 1.0 };
+ static const GLfloat mat_diff_green[] = { 0.0, 1.0, 0.0, 1.0 };
+ static const GLfloat mat_diff_trans_red[] = { 1.0, 0.0, 0.0, 0.7 };
+ static const GLfloat mat_diff_trans_green[] = { 0.0, 1.0, 0.0, 0.7 };
float p[3], pu[3], pv[3], n[3], mat[4][4];
- int i, j, k, l, m;
+ int i, j, k, l, m, b, skew;
double u, v, ur, vr;
double cu, su, cv, sv;
double xx[4], xxu[4], xxv[4], x[4], xu[4], xv[4];
double r, s, t;
+ float q1[4], q2[4], r1[4][4], r2[4][4];
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
- /* Compute the rotation that rotates the hypercube in 4D. */
- for (i=0; i<4; i++)
- for (j=0; j<4; j++)
- mat[i][j] = (i==j);
- rotatewx(mat,alpha);
- rotatewy(mat,beta);
- rotatewz(mat,delta);
- rotatexy(mat,zeta);
- rotatexz(mat,eta);
- rotateyz(mat,theta);
+ rotateall(hp->alpha,hp->beta,hp->delta,hp->zeta,hp->eta,hp->theta,r1);
+
+ gltrackball_get_quaternion(hp->trackballs[0],q1);
+ gltrackball_get_quaternion(hp->trackballs[1],q2);
+ quats_to_rotmat(q1,q2,r2);
+
+ mult_rotmat(r2,r1,mat);
if (colors != COLORS_COLORWHEEL)
{
}
}
+#if 0 /* #### not working */
+# ifdef HAVE_MOBILE /* Keep it the same relative size when rotated. */
+ {
+ GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+ int o = (int) current_device_rotation();
+ if (o != 0 && o != 180 && o != -180)
+ glScalef (1/h, 1/h, 1/h);
+ }
+# endif
+#endif
+
+ skew = num_spirals;
ur = umax-umin;
vr = vmax-vmin;
for (i=0; i<numu; i++)
{
- if (appearance == APPEARANCE_BANDS && ((i & 3) >= 2))
+ if ((appearance == APPEARANCE_BANDS ||
+ appearance == APPEARANCE_SPIRALS) && ((i & 3) >= 2))
continue;
if (display_mode == DISP_WIREFRAME)
glBegin(GL_QUAD_STRIP);
m = j;
u = ur*l/numu+umin;
v = vr*m/numv+vmin;
- color(u);
+ if (appearance == APPEARANCE_SPIRALS)
+ {
+ u += 4.0*skew/numv*v;
+ b = ((i/4)&(skew-1))*(numu/(4*skew));
+ color(ur*4*b/numu+umin);
+ }
+ else
+ {
+ color(u);
+ }
cu = cos(u);
su = sin(u);
cv = cos(v);
n[2] /= t;
glNormal3fv(n);
glVertex3fv(p);
+ polys++;
}
}
glEnd();
}
+ polys /= 2;
+ return polys;
}
static void init(ModeInfo *mi)
{
- static GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
- static GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
- static GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
- static GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
- static GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
-
- alpha = 0.0;
- beta = 0.0;
- delta = 0.0;
- zeta = 0.0;
- eta = 0.0;
- theta = 0.0;
+ static const GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+ static const GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+ static const GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
+
+ hp->alpha = 0.0;
+ hp->beta = 0.0;
+ hp->delta = 0.0;
+ hp->zeta = 0.0;
+ hp->eta = 0.0;
+ hp->theta = 0.0;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
+# ifdef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */
if (display_mode == DISP_WIREFRAME)
- {
- glDisable(GL_DEPTH_TEST);
- glShadeModel(GL_FLAT);
- glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
- glDisable(GL_LIGHTING);
- glDisable(GL_LIGHT0);
- glDisable(GL_BLEND);
- }
- else if (display_mode == DISP_SURFACE)
+ display_mode = DISP_SURFACE;
+# endif
+
+ if (display_mode == DISP_SURFACE)
{
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE);
}
- else
+ else /* display_mode == DISP_WIREFRAME */
{
glDisable(GL_DEPTH_TEST);
glShadeModel(GL_FLAT);
/* Redisplay the hypertorus. */
-static void display_hypertorus(void)
+static void display_hypertorus(ModeInfo *mi)
{
- alpha += speed_wx;
- if (alpha >= 360.0)
- alpha -= 360.0;
- beta += speed_wy;
- if (beta >= 360.0)
- beta -= 360.0;
- delta += speed_wz;
- if (delta >= 360.0)
- delta -= 360.0;
- zeta += speed_xy;
- if (zeta >= 360.0)
- zeta -= 360.0;
- eta += speed_xz;
- if (eta >= 360.0)
- eta -= 360.0;
- theta += speed_yz;
- if (theta >= 360.0)
- theta -= 360.0;
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
+
+ if (!hp->button_pressed)
+ {
+ hp->alpha += speed_wx * hp->speed_scale;
+ if (hp->alpha >= 360.0)
+ hp->alpha -= 360.0;
+ hp->beta += speed_wy * hp->speed_scale;
+ if (hp->beta >= 360.0)
+ hp->beta -= 360.0;
+ hp->delta += speed_wz * hp->speed_scale;
+ if (hp->delta >= 360.0)
+ hp->delta -= 360.0;
+ hp->zeta += speed_xy * hp->speed_scale;
+ if (hp->zeta >= 360.0)
+ hp->zeta -= 360.0;
+ hp->eta += speed_xz * hp->speed_scale;
+ if (hp->eta >= 360.0)
+ hp->eta -= 360.0;
+ hp->theta += speed_yz * hp->speed_scale;
+ if (hp->theta >= 360.0)
+ hp->theta -= 360.0;
+ }
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (projection_3d == DISP_3D_ORTHOGRAPHIC)
{
- if (aspect >= 1.0)
- glOrtho(-aspect,aspect,-1.0,1.0,0.1,100.0);
+ if (hp->aspect >= 1.0)
+ glOrtho(-hp->aspect,hp->aspect,-1.0,1.0,0.1,100.0);
else
- glOrtho(-1.0,1.0,-1.0/aspect,1.0/aspect,0.1,100.0);
+ glOrtho(-1.0,1.0,-1.0/hp->aspect,1.0/hp->aspect,0.1,100.0);
}
else
{
- gluPerspective(60.0,aspect,0.1,100.0);
+ gluPerspective(60.0,hp->aspect,0.1,100.0);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
- if (display_mode == DISP_WIREFRAME)
- hypertorus(0.0,2.0*M_PI,0.0,2.0*M_PI,40,40);
- else
- hypertorus(0.0,2.0*M_PI,0.0,2.0*M_PI,60,60);
+ mi->polygon_count = hypertorus(mi,0.0,2.0*M_PI,0.0,2.0*M_PI,64,64);
}
-void reshape_hypertorus(ModeInfo * mi, int width, int height)
+ENTRYPOINT void reshape_hypertorus(ModeInfo *mi, int width, int height)
{
hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
hp->WindW = (GLint)width;
hp->WindH = (GLint)height;
glViewport(0,0,width,height);
- aspect = (GLfloat)width/(GLfloat)height;
+ hp->aspect = (GLfloat)width/(GLfloat)height;
+}
+
+
+ENTRYPOINT Bool hypertorus_handle_event(ModeInfo *mi, XEvent *event)
+{
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
+ KeySym sym = 0;
+ char c = 0;
+
+ if (event->xany.type == KeyPress || event->xany.type == KeyRelease)
+ XLookupString (&event->xkey, &c, 1, &sym, 0);
+
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button == Button1)
+ {
+ hp->button_pressed = True;
+ gltrackball_start(hp->trackballs[hp->current_trackball],
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH(mi), MI_HEIGHT(mi));
+ return True;
+ }
+ else if (event->xany.type == ButtonRelease &&
+ event->xbutton.button == Button1)
+ {
+ hp->button_pressed = False;
+ return True;
+ }
+ else if (event->xany.type == KeyPress)
+ {
+ if (sym == XK_Shift_L || sym == XK_Shift_R)
+ {
+ hp->current_trackball = 1;
+ if (hp->button_pressed)
+ gltrackball_start(hp->trackballs[hp->current_trackball],
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH(mi), MI_HEIGHT(mi));
+ return True;
+ }
+ }
+ else if (event->xany.type == KeyRelease)
+ {
+ if (sym == XK_Shift_L || sym == XK_Shift_R)
+ {
+ hp->current_trackball = 0;
+ if (hp->button_pressed)
+ gltrackball_start(hp->trackballs[hp->current_trackball],
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH(mi), MI_HEIGHT(mi));
+ return True;
+ }
+ }
+ else if (event->xany.type == MotionNotify && hp->button_pressed)
+ {
+ gltrackball_track(hp->trackballs[hp->current_trackball],
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH(mi), MI_HEIGHT(mi));
+ return True;
+ }
+
+ return False;
}
*-----------------------------------------------------------------------------
*/
-void init_hypertorus(ModeInfo * mi)
+ENTRYPOINT void init_hypertorus(ModeInfo *mi)
{
hypertorusstruct *hp;
- if (hyper == NULL)
+ MI_INIT(mi, hyper, NULL);
+ hp = &hyper[MI_SCREEN(mi)];
+
+
+ hp->trackballs[0] = gltrackball_init(True);
+ hp->trackballs[1] = gltrackball_init(True);
+ hp->current_trackball = 0;
+ hp->button_pressed = False;
+
+ /* Set the display mode. */
+ if (!strcasecmp(mode,"wireframe") || !strcasecmp(mode,"0"))
{
- hyper = (hypertorusstruct *)calloc(MI_NUM_SCREENS(mi),
- sizeof(hypertorusstruct));
- if (hyper == NULL)
- return;
+ display_mode = DISP_WIREFRAME;
+ }
+ else if (!strcasecmp(mode,"surface") || !strcasecmp(mode,"1"))
+ {
+ display_mode = DISP_SURFACE;
+ }
+ else if (!strcasecmp(mode,"transparent") || !strcasecmp(mode,"2"))
+ {
+ display_mode = DISP_TRANSPARENT;
+ }
+ else
+ {
+ display_mode = DISP_SURFACE;
}
- hp = &hyper[MI_SCREEN(mi)];
+
+ /* Set the appearance. */
+ if (!strcasecmp(appear,"solid") || !strcasecmp(appear,"0"))
+ {
+ appearance = APPEARANCE_SOLID;
+ }
+ else if (!strcasecmp(appear,"bands") || !strcasecmp(appear,"1"))
+ {
+ appearance = APPEARANCE_BANDS;
+ num_spirals = 0;
+ }
+ else if (!strcasecmp(appear,"spirals-1") || !strcasecmp(appear,"3"))
+ {
+ appearance = APPEARANCE_SPIRALS;
+ num_spirals = 1;
+ }
+ else if (!strcasecmp(appear,"spirals-2") || !strcasecmp(appear,"4"))
+ {
+ appearance = APPEARANCE_SPIRALS;
+ num_spirals = 2;
+ }
+ else if (!strcasecmp(appear,"spirals-4") || !strcasecmp(appear,"5"))
+ {
+ appearance = APPEARANCE_SPIRALS;
+ num_spirals = 4;
+ }
+ else if (!strcasecmp(appear,"spirals-8") || !strcasecmp(appear,"6"))
+ {
+ appearance = APPEARANCE_SPIRALS;
+ num_spirals = 8;
+ }
+ else if (!strcasecmp(appear,"spirals-16") || !strcasecmp(appear,"7"))
+ {
+ appearance = APPEARANCE_SPIRALS;
+ num_spirals = 16;
+ }
+ else
+ {
+ appearance = APPEARANCE_BANDS;
+ num_spirals = 0;
+ }
+
+ /* Set the color mode. */
+ if (!strcasecmp(color_mode,"twosided"))
+ {
+ colors = COLORS_TWOSIDED;
+ }
+ else if (!strcasecmp(color_mode,"colorwheel"))
+ {
+ colors = COLORS_COLORWHEEL;
+ }
+ else
+ {
+ colors = COLORS_COLORWHEEL;
+ }
+
+ /* Set the 3d projection mode. */
+ if (!strcasecmp(proj_3d,"perspective") || !strcasecmp(proj_3d,"0"))
+ {
+ projection_3d = DISP_3D_PERSPECTIVE;
+ }
+ else if (!strcasecmp(proj_3d,"orthographic") || !strcasecmp(proj_3d,"1"))
+ {
+ projection_3d = DISP_3D_ORTHOGRAPHIC;
+ }
+ else
+ {
+ projection_3d = DISP_3D_PERSPECTIVE;
+ }
+
+ /* Set the 4d projection mode. */
+ if (!strcasecmp(proj_4d,"perspective") || !strcasecmp(proj_4d,"0"))
+ {
+ projection_4d = DISP_4D_PERSPECTIVE;
+ }
+ else if (!strcasecmp(proj_4d,"orthographic") || !strcasecmp(proj_4d,"1"))
+ {
+ projection_4d = DISP_4D_ORTHOGRAPHIC;
+ }
+ else
+ {
+ projection_4d = DISP_4D_PERSPECTIVE;
+ }
+
+ /* make multiple screens rotate at slightly different rates. */
+ hp->speed_scale = 0.9 + frand(0.3);
if ((hp->glx_context = init_GL(mi)) != NULL)
{
* Called by the mainline code periodically to update the display.
*-----------------------------------------------------------------------------
*/
-void draw_hypertorus(ModeInfo * mi)
+ENTRYPOINT void draw_hypertorus(ModeInfo *mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
- display_hypertorus();
+ display_hypertorus(mi);
if (MI_IS_FPS(mi))
do_fps (mi);
}
-/*
- *-----------------------------------------------------------------------------
- * The display is being taken away from us. Free up malloc'ed
- * memory and X resources that we've alloc'ed. Only called
- * once, we must zap everything for every screen.
- *-----------------------------------------------------------------------------
- */
-
-void release_hypertorus(ModeInfo * mi)
-{
- if (hyper != NULL)
- {
- int screen;
-
- for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
- {
- hypertorusstruct *hp = &hyper[screen];
-
- if (hp->glx_context)
- hp->glx_context = (GLXContext *)NULL;
- }
- (void) free((void *)hyper);
- hyper = (hypertorusstruct *)NULL;
- }
- FreeAllGL(mi);
-}
-
-void change_hypertorus(ModeInfo * mi)
+#ifndef STANDALONE
+ENTRYPOINT void change_hypertorus(ModeInfo *mi)
{
hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
glXMakeCurrent(MI_DISPLAY(mi),MI_WINDOW(mi),*(hp->glx_context));
init(mi);
}
+#endif /* !STANDALONE */
+
+XSCREENSAVER_MODULE ("Hypertorus", hypertorus)
#endif /* USE_GL */
projects / xscreensaver / blobdiff