-/* xscreensaver, Copyright (c) 1998 Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1998-2004 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* Needs music. ("Hellraiser Themes" by Coil: TORSO CD161; also
duplicated on the "Unnatural History 2" compilation, WORLN M04699.)
-
- * I'm not totally happy with the spinning motion; I like the
- acceleration and deceleration, but it often feels like it's going too
- fast, or not naturally enough, or something.
-
- * However, the motion is better than that used by gears, superquadrics,
- etc.; so maybe I should make them all share the same motion code.
*/
#include <X11/Intrinsic.h>
#define HACK_INIT init_lament
#define HACK_DRAW draw_lament
#define HACK_RESHAPE reshape_lament
+#define HACK_HANDLE_EVENT lament_handle_event
+#define EVENT_MASK PointerMotionMask
#define lament_opts xlockmore_opts
-#define DEFAULTS "*delay: 10000 \n" \
+#define DEFAULTS "*delay: 20000 \n" \
"*showFPS: False \n" \
"*wireframe: False \n" \
- "*texture: True \n"
+
#include "xlockmore.h"
#ifdef USE_GL /* whole file */
static int do_texture;
static XrmOptionDescRec opts[] = {
- {"-texture", ".lament.texture", XrmoptionNoArg, (caddr_t) "true" },
- {"+texture", ".lament.texture", XrmoptionNoArg, (caddr_t) "false" },
+ {"-texture", ".lament.texture", XrmoptionNoArg, "true" },
+ {"+texture", ".lament.texture", XrmoptionNoArg, "false" },
};
static argtype vars[] = {
- {(caddr_t *) &do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool},
+ {&do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool},
};
ModeSpecOpt lament_opts = {countof(opts), opts, countof(vars), vars, NULL};
+#include "normals.h"
#include "xpm-ximage.h"
-
+#include "rotator.h"
+#include "gltrackball.h"
#include "../images/lament.xpm"
#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n))))
typedef struct {
GLXContext *glx_context;
+ rotator *rot;
+ double rotx, roty, rotz;
+ trackball_state *trackball;
+ Bool button_down_p;
GLuint box; /* display list IDs */
GLuint star1, star2;
GLuint lid_0, lid_1, lid_2, lid_3, lid_4;
GLuint taser_base, taser_lifter, taser_slider;
- GLfloat rotx, roty, rotz; /* current object rotation */
- GLfloat dx, dy, dz; /* current rotational velocity */
- GLfloat ddx, ddy, ddz; /* current rotational acceleration */
- GLfloat d_max; /* max velocity */
XImage *texture; /* image bits */
GLuint texids[6]; /* texture map IDs */
lament_type type; /* which mode of the object is current */
lament_faces);
}
-\f
-/* Computing normal vectors (thanks to Nat Friedman <ndf@mit.edu>)
- */
-
-typedef struct vector {
- GLfloat x, y, z;
-} vector;
-
-typedef struct plane {
- vector p1, p2, p3;
-} plane;
-
-static void
-vector_set(vector *v, GLfloat x, GLfloat y, GLfloat z)
-{
- v->x = x;
- v->y = y;
- v->z = z;
-}
-
-static void
-vector_cross(vector v1, vector v2, vector *v3)
-{
- v3->x = (v1.y * v2.z) - (v1.z * v2.y);
- v3->y = (v1.z * v2.x) - (v1.x * v2.z);
- v3->z = (v1.x * v2.y) - (v1.y * v2.x);
-}
-
-static void
-vector_subtract(vector v1, vector v2, vector *res)
-{
- res->x = v1.x - v2.x;
- res->y = v1.y - v2.y;
- res->z = v1.z - v2.z;
-}
-
-static void
-plane_normal(plane p, vector *n)
-{
- vector v1, v2;
- vector_subtract(p.p1, p.p2, &v1);
- vector_subtract(p.p1, p.p3, &v2);
- vector_cross(v2, v1, n);
-}
-
-static void
-do_normal(GLfloat x1, GLfloat y1, GLfloat z1,
- GLfloat x2, GLfloat y2, GLfloat z2,
- GLfloat x3, GLfloat y3, GLfloat z3)
-{
- plane plane;
- vector n;
- vector_set(&plane.p1, x1, y1, z1);
- vector_set(&plane.p2, x2, y2, z2);
- vector_set(&plane.p3, x3, y3, z3);
- plane_normal(plane, &n);
- n.x = -n.x; n.y = -n.y; n.z = -n.z;
-
- glNormal3f(n.x, n.y, n.z);
-
-#ifdef DEBUG
- /* Draw a line in the direction of this face's normal. */
- {
- GLfloat ax = n.x > 0 ? n.x : -n.x;
- GLfloat ay = n.y > 0 ? n.y : -n.y;
- GLfloat az = n.z > 0 ? n.z : -n.z;
- GLfloat mx = (x1 + x2 + x3) / 3;
- GLfloat my = (y1 + y2 + y3) / 3;
- GLfloat mz = (z1 + z2 + z3) / 3;
- GLfloat xx, yy, zz;
-
- GLfloat max = ax > ay ? ax : ay;
- if (az > max) max = az;
- max *= 2;
- xx = n.x / max;
- yy = n.y / max;
- zz = n.z / max;
-
- glBegin(GL_LINE_LOOP);
- glVertex3f(mx, my, mz);
- glVertex3f(mx+xx, my+yy, mz+zz);
- glEnd();
- }
-#endif /* DEBUG */
-}
-
-
\f
/* Shorthand utilities for making faces, with proper normals.
*/
/* Rendering and animating object models
*/
+Bool
+lament_handle_event (ModeInfo *mi, XEvent *event)
+{
+ lament_configuration *lc = &lcs[MI_SCREEN(mi)];
+
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button == Button1)
+ {
+ lc->button_down_p = True;
+ gltrackball_start (lc->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)
+ {
+ lc->button_down_p = False;
+ return True;
+ }
+ else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5))
+ {
+ gltrackball_mousewheel (lc->trackball, event->xbutton.button, 5,
+ !!event->xbutton.state);
+ return True;
+ }
+ else if (event->xany.type == MotionNotify &&
+ lc->button_down_p)
+ {
+ gltrackball_track (lc->trackball,
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
+ }
+
+ return False;
+}
+
+
static void
draw(ModeInfo *mi)
{
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
- {
- GLfloat x = lc->rotx;
- GLfloat y = lc->roty;
- GLfloat z = lc->rotz;
-
-#if 0
- x=0.75; y=0; z=0;
-#endif
- if (x < 0) x = 1 - (x + 1);
- if (y < 0) y = 1 - (y + 1);
- if (z < 0) z = 1 - (z + 1);
+ gltrackball_rotate (lc->trackball);
- /* Make into the screen be +Y right be +X, and up be +Z. */
- glRotatef(-90.0, 1.0, 0.0, 0.0);
+ /* Make into the screen be +Y right be +X, and up be +Z. */
+ glRotatef(-90.0, 1.0, 0.0, 0.0);
- /* Scale it up. */
- glScalef(4.0, 4.0, 4.0);
+ /* Scale it up. */
+ glScalef(4.0, 4.0, 4.0);
#ifdef DEBUG
glPushMatrix();
glPushMatrix();
{
/* Apply rotation to the object. */
- glRotatef(x * 360, 1.0, 0.0, 0.0);
- glRotatef(y * 360, 0.0, 1.0, 0.0);
- glRotatef(z * 360, 0.0, 0.0, 1.0);
+ if (lc->type != LAMENT_LID_ZOOM)
+ get_rotation (lc->rot, &lc->rotx, &lc->roty, &lc->rotz,
+ !lc->button_down_p);
+ glRotatef (lc->rotx * 360, 1.0, 0.0, 0.0);
+ glRotatef (lc->roty * 360, 0.0, 1.0, 0.0);
+ glRotatef (lc->rotz * 360, 0.0, 0.0, 1.0);
switch (lc->type)
{
}
glPopMatrix();
- }
glPopMatrix();
}
{
lc->anim_r = 0.0;
lc->anim_z = 0.0;
- lc->rotx = frand(1.0) * RANDSIGN();
- lc->roty = frand(1.0) * RANDSIGN();
- lc->rotz = frand(1.0) * RANDSIGN();
lc->type = LAMENT_BOX;
}
break;
}
-static void
-rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v)
-{
- double ppos = *pos;
-
- /* tick position */
- if (ppos < 0)
- ppos = -(ppos + *v);
- else
- ppos += *v;
-
- if (ppos > 1.0)
- ppos -= 1.0;
- else if (ppos < 0)
- ppos += 1.0;
-
- if (ppos < 0) abort();
- if (ppos > 1.0) abort();
- *pos = (*pos > 0 ? ppos : -ppos);
-
- /* accelerate */
- *v += *dv;
-
- /* clamp velocity */
- if (*v > max_v || *v < -max_v)
- {
- *dv = -*dv;
- }
- /* If it stops, start it going in the other direction. */
- else if (*v < 0)
- {
- if (random() % 4)
- {
- *v = 0;
-
- /* keep going in the same direction */
- if (random() % 2)
- *dv = 0;
- else if (*dv < 0)
- *dv = -*dv;
- }
- else
- {
- /* reverse gears */
- *v = -*v;
- *dv = -*dv;
- *pos = -*pos;
- }
- }
-
- /* Alter direction of rotational acceleration randomly. */
- if (! (random() % 120))
- *dv = -*dv;
-
- /* Change acceleration very occasionally. */
- if (! (random() % 200))
- {
- if (*dv == 0)
- *dv = 0.00001;
- else if (random() & 1)
- *dv *= 1.2;
- else
- *dv *= 0.8;
- }
-}
-
-
\f
/* Window management, etc
*/
Note that the image-map bits we have are 128x128. Therefore, if the
image is magnified a lot, it looks pretty blocky. So it's better to
have a 128x128 animation on a 1280x1024 screen that looks good, than
- a 1024x1024 animation that looks really pixellated.
+ a 1024x1024 animation that looks really pixelated.
*/
if (win_size > target_size * 1.5)
{
clear_gl_error();
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
lc->texture->width, height, 0,
- GL_RGBA, GL_UNSIGNED_BYTE,
+ GL_RGBA,
+ /* GL_UNSIGNED_BYTE, */
+ GL_UNSIGNED_INT_8_8_8_8_REV,
(lc->texture->data +
(lc->texture->bytes_per_line * height * i)));
check_gl_error("texture");
lc = &lcs[MI_SCREEN(mi)];
- lc->rotx = frand(1.0) * RANDSIGN();
- lc->roty = frand(1.0) * RANDSIGN();
- lc->rotz = frand(1.0) * RANDSIGN();
-
- /* bell curve from 0-1.5 degrees, avg 0.75 */
- lc->dx = (frand(1) + frand(1) + frand(1)) / (360*2);
- lc->dy = (frand(1) + frand(1) + frand(1)) / (360*2);
- lc->dz = (frand(1) + frand(1) + frand(1)) / (360*2);
-
- lc->d_max = lc->dx * 2;
-
- lc->ddx = 0.00006 + frand(0.00003);
- lc->ddy = 0.00006 + frand(0.00003);
- lc->ddz = 0.00006 + frand(0.00003);
+ {
+ double rot_speed = 0.5;
+ lc->rot = make_rotator (rot_speed, rot_speed, rot_speed, 1, 0, True);
+ lc->trackball = gltrackball_init ();
+ }
lc->type = LAMENT_BOX;
lc->anim_pause = 300 + (random() % 100);
glFinish();
glXSwapBuffers(dpy, window);
- if (lc->type != LAMENT_LID_ZOOM)
- {
- rotate(&lc->rotx, &lc->dx, &lc->ddx, lc->d_max);
- rotate(&lc->roty, &lc->dy, &lc->ddy, lc->d_max);
- rotate(&lc->rotz, &lc->dz, &lc->ddz, lc->d_max);
- }
-
if (lc->anim_pause)
lc->anim_pause--;
else