static const char sccsid[] = "@(#)stairs.c 4.07 97/11/24 xlockmore";
#endif
-#undef DEBUG_LISTS
-
/*-
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
#ifdef STANDALONE
# define DEFAULTS "*delay: 20000 \n" \
"*showFPS: False \n"
+
# define refresh_stairs 0
-# define stairs_handle_event 0
# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#ifdef USE_GL
#include "e_textures.h"
+#include "sphere.h"
+#include "gltrackball.h"
ENTRYPOINT ModeSpecOpt stairs_opts =
{0, NULL, 0, NULL, NULL};
typedef struct {
GLint WindH, WindW;
GLfloat step;
- Bool direction;
+ int rotating;
int AreObjectsDefined[1];
int sphere_position;
int sphere_tick;
GLXContext *glx_context;
+ trackball_state *trackball;
+ Bool button_down_p;
GLuint objects;
} stairsstruct;
static const float lmodel_ambient[] = {0.5, 0.5, 0.5, 1.0};
static const float lmodel_twoside[] = {GL_TRUE};
-#if 0
-static const float MaterialRed[] = {0.7, 0.0, 0.0, 1.0};
-static const float MaterialGreen[] = {0.1, 0.5, 0.2, 1.0};
-static const float MaterialBlue[] = {0.0, 0.0, 0.7, 1.0};
-static const float MaterialCyan[] = {0.2, 0.5, 0.7, 1.0};
-static const float MaterialMagenta[] = {0.6, 0.2, 0.5, 1.0};
-static const float MaterialGray[] = {0.2, 0.2, 0.2, 1.0};
-static const float MaterialGray5[] = {0.5, 0.5, 0.5, 1.0};
-static const float MaterialGray6[] = {0.6, 0.6, 0.6, 1.0};
-static const float MaterialGray8[] = {0.8, 0.8, 0.8, 1.0};
-
-#endif
static const float MaterialYellow[] = {0.7, 0.7, 0.0, 1.0};
static const float MaterialWhite[] = {0.7, 0.7, 0.7, 1.0};
-static const float positions[] =
-{
- -2.5, 4.0, 0.0, /* First one is FUDGED :) */
- -3.0, 3.25, 1.0,
- -3.0, 4.4, 1.5,
- -3.0, 3.05, 2.0,
- -3.0, 4.2, 2.5,
-
- -3.0, 2.85, 3.0,
- -2.5, 4.0, 3.0,
- -2.0, 2.75, 3.0,
- -1.5, 3.9, 3.0,
- -1.0, 2.65, 3.0,
- -0.5, 3.8, 3.0,
- 0.0, 2.55, 3.0,
- 0.5, 3.7, 3.0,
- 1.0, 2.45, 3.0,
- 1.5, 3.6, 3.0,
- 2.0, 2.35, 3.0,
-
- 2.0, 3.5, 2.5,
- 2.0, 2.25, 2.0,
- 2.0, 3.4, 1.5,
- 2.0, 2.15, 1.0,
- 2.0, 3.3, 0.5,
- 2.0, 2.05, 0.0,
- 2.0, 3.2, -0.5,
- 2.0, 1.95, -1.0,
- 2.0, 3.1, -1.5,
- 2.0, 1.85, -2.0,
-
- 1.5, 2.9, -2.0,
- 1.0, 1.65, -2.0,
- 0.5, 2.7, -2.0,
- 0.0, 1.55, -2.0,
- -0.5, 2.5, -2.0,
- -1.0, 1.45, -2.0,
+static const float ball_positions[] = {
+ -3.0, 3.0, 1.0,
+ -3.0, 2.8, 2.0,
+ -3.0, 2.6, 3.0,
+
+ -2.0, 2.4, 3.0,
+ -1.0, 2.2, 3.0,
+ 0.0, 2.0, 3.0,
+ 1.0, 1.8, 3.0,
+ 2.0, 1.6, 3.0,
+
+ 2.0, 1.5, 2.0,
+ 2.0, 1.4, 1.0,
+ 2.0, 1.3, 0.0,
+ 2.0, 1.2, -1.0,
+ 2.0, 1.1, -2.0,
+
+ 1.0, 0.9, -2.0,
+ 0.0, 0.7, -2.0,
+ -1.0, 0.5, -2.0,
};
-#define NPOSITIONS ((sizeof positions) / (sizeof positions[0]))
-
-#define SPHERE_TICKS 8
+#define NPOSITIONS ((sizeof ball_positions) / (sizeof ball_positions[0]) / 3)
+#define SPHERE_TICKS 32
static stairsstruct *stairs = NULL;
-#define ObjSphere 0
-
-#define PlankWidth 3.0
-#define PlankHeight 0.35
-#define PlankThickness 0.15
-
-static void
-mySphere(float radius)
-{
- GLUquadricObj *quadObj;
-
- quadObj = gluNewQuadric();
- gluQuadricDrawStyle(quadObj, (GLenum) GLU_FILL);
- gluSphere(quadObj, radius, 16, 16);
- gluDeleteQuadric(quadObj);
-}
-
-static void
+static int
draw_block(GLfloat width, GLfloat height, GLfloat thickness)
{
+ int polys = 0;
+ glFrontFace(GL_CCW);
glBegin(GL_QUADS);
glNormal3f(0, 0, 1);
glTexCoord2f(0, 0);
glVertex3f(width, height, thickness);
glTexCoord2f(0, 1);
glVertex3f(-width, height, thickness);
+ polys++;
glNormal3f(0, 0, -1);
glTexCoord2f(0, 0);
glVertex3f(-width, height, -thickness);
glVertex3f(width, -height, -thickness);
glTexCoord2f(0, 1);
glVertex3f(-width, -height, -thickness);
+ polys++;
glNormal3f(0, 1, 0);
glTexCoord2f(0, 0);
glVertex3f(-width, height, thickness);
glVertex3f(width, height, -thickness);
glTexCoord2f(0, 1);
glVertex3f(-width, height, -thickness);
+ polys++;
glNormal3f(0, -1, 0);
glTexCoord2f(0, 0);
glVertex3f(-width, -height, -thickness);
glVertex3f(width, -height, thickness);
glTexCoord2f(0, 1);
glVertex3f(-width, -height, thickness);
+ polys++;
glNormal3f(1, 0, 0);
glTexCoord2f(0, 0);
glVertex3f(width, -height, thickness);
glVertex3f(width, height, -thickness);
glTexCoord2f(0, 1);
glVertex3f(width, height, thickness);
+ polys++;
glNormal3f(-1, 0, 0);
glTexCoord2f(0, 0);
glVertex3f(-width, height, thickness);
glVertex3f(-width, -height, -thickness);
glTexCoord2f(0, 1);
glVertex3f(-width, -height, thickness);
+ polys++;
glEnd();
+ return polys;
}
static void
draw_stairs_internal(ModeInfo * mi)
{
- stairsstruct *sp = &stairs[MI_SCREEN(mi)];
GLfloat X;
+ mi->polygon_count = 0;
+
glPushMatrix();
glPushMatrix();
glTranslatef(-3.0, 0.1, 2.0);
for (X = 0; X < 2; X++) {
- draw_block(0.5, 2.7 + 0.1 * X, 0.5);
+ mi->polygon_count += draw_block(0.5, 2.7 + 0.1 * X, 0.5);
glTranslatef(0.0, 0.1, -1.0);
}
glPopMatrix();
glPushMatrix();
for (X = 0; X < 6; X++) {
- draw_block(0.5, 2.6 - 0.1 * X, 0.5);
+ mi->polygon_count += draw_block(0.5, 2.6 - 0.1 * X, 0.5);
glTranslatef(1.0, -0.1, 0.0);
}
glTranslatef(-1.0, -0.9, -1.0);
for (X = 0; X < 5; X++) {
- draw_block(0.5, 3.0 - 0.1 * X, 0.5);
+ mi->polygon_count += draw_block(0.5, 3.0 - 0.1 * X, 0.5);
glTranslatef(0.0, 0.0, -1.0);
}
glTranslatef(-1.0, -1.1, 1.0);
for (X = 0; X < 3; X++) {
- draw_block(0.5, 3.5 - 0.1 * X, 0.5);
+ mi->polygon_count += draw_block(0.5, 3.5 - 0.1 * X, 0.5);
glTranslatef(-1.0, -0.1, 0.0);
}
glPopMatrix();
glPopMatrix();
+}
- glPushMatrix();
- glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialYellow);
-
- {
- int pos = sp->sphere_position;
- int ppos = sp->sphere_position - 3;
- int npos = sp->sphere_position + 3;
- GLfloat spx, spy, spz;
- GLfloat dx, dy, dz;
- int div;
-
- if (ppos < 0) ppos += NPOSITIONS;
- if (npos >= NPOSITIONS) npos -= NPOSITIONS;
-
- if (sp->sphere_tick < 0)
- {
- dx = positions[ppos] - positions[pos];
- dy = positions[ppos+1] - positions[pos+1];
- dz = positions[ppos+2] - positions[pos+2];
- div = SPHERE_TICKS + sp->sphere_tick;
- }
- else
- {
- dx = positions[npos] - positions[pos];
- dy = positions[npos+1] - positions[pos+1];
- dz = positions[npos+2] - positions[ppos+2];
- div = SPHERE_TICKS - sp->sphere_tick;
- }
-
- spx = positions[pos];
- spy = positions[pos+1];
- spz = positions[pos+2];
- if (div != 0)
- {
- spx += dx / div;
- spy += dy / div;
- spz += dz / div;
- }
-
-
- spy -= 0.5; /* move the bottom of the ball closer to the stairs */
-
-
-#ifdef DEBUG
- fprintf(stderr, "%3d %3d %2.2f %2.2f %2.2f %2.2f %2.2f %2.2f\n",
- sp->sphere_position, sp->sphere_tick,
- dx, dy, dz,
- spx, spy, spz);
+/*#define DEBUG*/
+/*#define DEBUG_PATH*/
- glBegin(GL_LINE_LOOP); /* path 1 */
- glVertex3f(positions[pos], positions[pos+1], positions[pos+2]);
- glVertex3f(positions[npos], positions[npos+1], positions[npos+2]);
- glEnd();
+static int
+draw_sphere(int pos, int tick)
+{
+ int pos2 = (pos+1) % NPOSITIONS;
+ GLfloat x1 = ball_positions[pos*3];
+ GLfloat y1 = ball_positions[pos*3+1];
+ GLfloat z1 = ball_positions[pos*3+2];
+ GLfloat x2 = ball_positions[pos2*3];
+ GLfloat y2 = ball_positions[pos2*3+1];
+ GLfloat z2 = ball_positions[pos2*3+2];
+ GLfloat frac = tick / (GLfloat) SPHERE_TICKS;
+ GLfloat x = x1 + (x2 - x1) * frac;
+ GLfloat y = y1 + (y2 - y1) * frac + (2 * sin (M_PI * frac));
+ GLfloat z = z1 + (z2 - z1) * frac;
+ int polys = 0;
- glBegin(GL_LINE_LOOP); /* path 2 */
- glVertex3f(positions[pos], positions[pos+1], positions[pos+2]);
- glVertex3f(positions[ppos], positions[ppos+1], positions[ppos+2]);
- glEnd();
+ glPushMatrix();
- glBegin(GL_LINE_LOOP); /* base origin */
- glVertex3f(positions[pos], positions[pos+1]-10, positions[pos+2]);
- glVertex3f(positions[pos], positions[pos+1]+10, positions[pos+2]);
- glEnd();
+# ifdef DEBUG_PATH
+ glVertex3f(x, y, z);
+ if (tick == 0) {
+ glVertex3f(x, y-7.5, z);
+ glVertex3f(x, y, z); glVertex3f(x, y, z-0.6);
+ glVertex3f(x, y, z); glVertex3f(x, y, z+0.6);
+ glVertex3f(x, y, z); glVertex3f(x+0.6, y, z);
+ glVertex3f(x, y, z); glVertex3f(x-0.6, y, z);
+ glVertex3f(x, y, z);
+ }
- glBegin(GL_LINE_LOOP); /* base origin */
- glVertex3f(positions[pos]-10, positions[pos+1], positions[pos+2]);
- glVertex3f(positions[pos]+10, positions[pos+1], positions[pos+2]);
- glEnd();
+# else /* !DEBUG_PATH */
+ y += 0.5;
+ glTranslatef(x, y, z);
- glBegin(GL_LINE_LOOP); /* base origin */
- glVertex3f(positions[pos], positions[pos+1], positions[pos+2]-10);
- glVertex3f(positions[pos], positions[pos+1], positions[pos+2]+10);
- glEnd();
-#endif /* DEBUG */
+ glScalef (0.5, 0.5, 0.5);
- glTranslatef(spx, spy, spz);
+ /* make ball a little smaller on the gap to obscure distance */
+ if (pos == NPOSITIONS-1)
+ glScalef (0.95, 0.95, 0.95);
-#ifdef DEBUG /* ball origin */
- glBegin(GL_LINE_LOOP); glVertex3f(0,-2,0); glVertex3f(0,2,0); glEnd();
- glBegin(GL_LINE_LOOP); glVertex3f(-2,0,0); glVertex3f(2,0,0); glEnd();
- glBegin(GL_LINE_LOOP); glVertex3f(0,0,-2); glVertex3f(0,0,2); glEnd();
-#endif /* DEBUG */
- }
+ glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialYellow);
+ glDisable (GL_TEXTURE_2D);
+ glShadeModel(GL_SMOOTH);
+ polys += unit_sphere (32, 32, False);
+ glShadeModel(GL_FLAT);
+ glEnable (GL_TEXTURE_2D);
+#endif /* !DEBUG_PATH */
- if (sp->sphere_position == 0) /* FUDGE soo its not so obvious */
- mySphere(0.48);
- else
- mySphere(0.5);
glPopMatrix();
+ return polys;
+}
- if (++sp->sphere_tick >= SPHERE_TICKS-1)
- {
- sp->sphere_tick = -(SPHERE_TICKS-2);
- sp->sphere_position += 3;
- sp->sphere_position += 3;
- }
- if (sp->sphere_position >= NPOSITIONS)
- sp->sphere_position = 0;
-}
ENTRYPOINT void
reshape_stairs (ModeInfo * mi, int width, int height)
}
}
+ENTRYPOINT Bool
+stairs_handle_event (ModeInfo *mi, XEvent *event)
+{
+ stairsstruct *sp = &stairs[MI_SCREEN(mi)];
+
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button == Button1)
+ {
+ sp->button_down_p = True;
+ gltrackball_start (sp->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)
+ {
+ sp->button_down_p = False;
+ return True;
+ }
+ else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5 ||
+ event->xbutton.button == Button6 ||
+ event->xbutton.button == Button7))
+ {
+ gltrackball_mousewheel (sp->trackball, event->xbutton.button, 10,
+ !!event->xbutton.state);
+ return True;
+ }
+ else if (event->xany.type == MotionNotify &&
+ sp->button_down_p)
+ {
+ gltrackball_track (sp->trackball,
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
+ }
+ else if (event->xany.type == KeyPress)
+ {
+ KeySym keysym;
+ char c = 0;
+ XLookupString (&event->xkey, &c, 1, &keysym, 0);
+ if (c == ' ')
+ {
+ gltrackball_reset (sp->trackball);
+ return True;
+ }
+ }
+
+ return False;
+}
+
+
static void
pinit(void)
{
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glEnable(GL_NORMALIZE);
- glFrontFace(GL_CCW);
glCullFace(GL_BACK);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, MaterialWhite);
return;
}
sp = &stairs[screen];
- sp->step = 0.0;
-
- /* make multiple screens rotate at slightly different rates. */
- sp->step -= frand(5.0);
- sp->direction = LRAND() & 1;
- sp->sphere_position = NRAND(NPOSITIONS / 3) * 3;
+ sp->step = 0.0;
+ sp->rotating = 0;
+ sp->sphere_position = NRAND(NPOSITIONS);
sp->sphere_tick = 0;
if ((sp->glx_context = init_GL(mi)) != NULL) {
} else {
MI_CLEARWINDOW(mi);
}
+
+ sp->trackball = gltrackball_init ();
}
ENTRYPOINT void
glScalef(Scale4Iconic * sp->WindH / sp->WindW, Scale4Iconic, Scale4Iconic);
}
+ gltrackball_rotate (sp->trackball);
+
+ glTranslatef(0, 0.5, 0);
glRotatef(44.5, 1, 0, 0);
- glRotatef(50 + ((sp->direction) ? 1 : -1) *
- ((sp->step * 100 > 120) ? sp->step * 100 - 120 : 0), 0, 1, 0);
- if (sp->step * 100 >= 360 + 120) { /* stop showing secrets */
+ glRotatef(50, 0, 1, 0);
+
+ if (!sp->rotating) {
+ if ((LRAND() % 500) == 0)
+ sp->rotating = (LRAND() & 1) ? 1 : -1;
+ }
+
+ if (sp->rotating) {
+ glRotatef(sp->rotating * sp->step, 0, 1, 0);
+ if (sp->step >= 360) {
+ sp->rotating = 0;
sp->step = 0;
- sp->direction = LRAND() & 1;
- }
+ }
+
+# ifndef DEBUG
+ if (!sp->button_down_p)
+ sp->step += 2;
+# endif /* DEBUG */
+ }
+
draw_stairs_internal(mi);
+
+# ifdef DEBUG
+ {
+ int i, j;
+# ifdef DEBUG_PATH
+ glDisable(GL_LIGHTING);
+ glDisable(GL_TEXTURE_2D);
+ glBegin (GL_LINE_LOOP);
+# endif /* DEBUG_PATH */
+ for (i = 0; i < NPOSITIONS; i ++)
+ for (j = 0; j < SPHERE_TICKS; j++)
+ mi->polygon_count += draw_sphere(i, j);
+# ifdef DEBUG_PATH
+ glEnd();
+ glEnable(GL_LIGHTING);
+ glEnable(GL_TEXTURE_2D);
+# endif /* DEBUG_PATH */
+ }
+#else /* !DEBUG */
+ mi->polygon_count += draw_sphere(sp->sphere_position, sp->sphere_tick);
+#endif /* !DEBUG */
+
+ if (sp->button_down_p)
+ ;
+ else if (++sp->sphere_tick >= SPHERE_TICKS)
+ {
+ sp->sphere_tick = 0;
+ if (++sp->sphere_position >= NPOSITIONS)
+ sp->sphere_position = 0;
+ }
+
glPopMatrix();
if (mi->fps_p) do_fps (mi);
glFlush();
glXSwapBuffers(display, window);
-
- sp->step += 0.025;
}
#ifndef STANDALONE
projects / xscreensaver / blobdiff