X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fglx%2Fglplanet.c;h=21cf1f4db00680bc01fd55015817191df7a29bb7;hp=1a884bf3cb5e71b7f6404fa19b69b76a4ac83cbb;hb=f8cf5ac7b2f53510f80a0eaf286a25298be17bfe;hpb=ec8d2b32b63649e6d32bdfb306eda062769af823 diff --git a/hacks/glx/glplanet.c b/hacks/glx/glplanet.c index 1a884bf3..21cf1f4d 100644 --- a/hacks/glx/glplanet.c +++ b/hacks/glx/glplanet.c @@ -62,6 +62,7 @@ #define DEF_ROTATE "True" #define DEF_ROLL "True" #define DEF_WANDER "True" +#define DEF_SPIN "0.03" #define DEF_TEXTURE "True" #define DEF_STARS "True" #define DEF_LIGHT "True" @@ -79,6 +80,7 @@ static int do_stars; static int do_light; static char *which_image; static int resolution; +static float star_spin; static XrmOptionDescRec opts[] = { {"-rotate", ".glplanet.rotate", XrmoptionNoArg, "true" }, @@ -91,6 +93,7 @@ static XrmOptionDescRec opts[] = { {"+texture", ".glplanet.texture", XrmoptionNoArg, "false" }, {"-stars", ".glplanet.stars", XrmoptionNoArg, "true" }, {"+stars", ".glplanet.stars", XrmoptionNoArg, "false" }, + {"-spin", ".glplanet.spin", XrmoptionSepArg, 0 }, {"-light", ".glplanet.light", XrmoptionNoArg, "true" }, {"+light", ".glplanet.light", XrmoptionNoArg, "false" }, {"-image", ".glplanet.image", XrmoptionSepArg, 0 }, @@ -106,6 +109,7 @@ static argtype vars[] = { {&do_light, "light", "Light", DEF_LIGHT, t_Bool}, {&which_image, "image", "Image", DEF_IMAGE, t_String}, {&resolution, "resolution","Resolution", DEF_RESOLUTION, t_Int}, + {&star_spin, "spin", "Float", DEF_SPIN, t_Float}, }; ENTRYPOINT ModeSpecOpt planet_opts = {countof(opts), opts, countof(vars), vars, NULL}; @@ -159,6 +163,7 @@ typedef struct { double z; rotator *rot; trackball_state *trackball; + double star_theta; Bool button_down_p; } planetstruct; @@ -252,106 +257,71 @@ setup_texture(ModeInfo * mi) static void init_stars (ModeInfo *mi) { + planetstruct *gp = &planets[MI_SCREEN(mi)]; int i, j; - GLfloat max_size = 3; - GLfloat inc = 0.5; - int steps = max_size / inc; int width = MI_WIDTH(mi); int height = MI_HEIGHT(mi); - - planetstruct *gp = &planets[MI_SCREEN(mi)]; - Bool wire = MI_IS_WIREFRAME(mi); - - if (!wire) - glEnable (GL_POINT_SMOOTH); + int size = (width > height ? width : height); + int nstars = size * size / 320; + int max_size = 3; + GLfloat inc = 0.5; + int steps = max_size / inc; gp->starlist = glGenLists(1); glNewList(gp->starlist, GL_COMPILE); - glScalef (1.0/width, 1.0/height, 1); + glEnable(GL_POINT_SMOOTH); for (j = 1; j <= steps; j++) { glPointSize(inc * j); - glBegin(GL_POINTS); - for (i = 0 ; i < NUM_STARS / steps; i++) + glBegin (GL_POINTS); + for (i = 0; i < nstars / steps; i++) { glColor3f (0.6 + frand(0.3), 0.6 + frand(0.3), 0.6 + frand(0.3)); - glVertex2f ((GLfloat) (random() % width), - (GLfloat) (random() % height)); + glVertex2f (2 * size * (0.5 - frand(1.0)), + 2 * size * (0.5 - frand(1.0))); } - glEnd(); + glEnd (); } - glEndList(); + glEndList (); check_gl_error("stars initialization"); } static void -draw_stars (ModeInfo * mi) +draw_stars (ModeInfo *mi) { - int width = MI_WIDTH(mi); - int height = MI_HEIGHT(mi); - planetstruct *gp = &planets[MI_SCREEN(mi)]; - /* Sadly, this causes a stall of the graphics pipeline (as would the - equivalent calls to glGet*.) But there's no way around this, short - of having each caller set up the specific display matrix we need - here, which would kind of defeat the purpose of centralizing this - code in one file. - */ - glPushAttrib(GL_TRANSFORM_BIT | /* for matrix contents */ - GL_ENABLE_BIT | /* for various glDisable calls */ - GL_CURRENT_BIT | /* for glColor3f() */ - GL_LIST_BIT); /* for glListBase() */ - { - check_gl_error ("glPushAttrib"); - - /* disable lighting and texturing when drawing stars! - (glPopAttrib() restores these.) - */ - glDisable(GL_TEXTURE_2D); - glDisable(GL_LIGHTING); - glDisable(GL_DEPTH_TEST); - - /* glPopAttrib() does not restore matrix changes, so we must - push/pop the matrix stacks to be non-intrusive there. - */ - glMatrixMode(GL_PROJECTION); - glPushMatrix(); - { - check_gl_error ("glPushMatrix"); - glLoadIdentity(); - - /* Each matrix mode has its own stack, so we need to push/pop - them separately. */ - glMatrixMode(GL_MODELVIEW); - glPushMatrix(); - { - check_gl_error ("glPushMatrix"); - glLoadIdentity(); + glDisable(GL_TEXTURE_2D); + glDisable(GL_LIGHTING); + glDisable(GL_DEPTH_TEST); - gluOrtho2D (0, width, 0, height); - check_gl_error ("gluOrtho2D"); + glMatrixMode (GL_PROJECTION); + glPushMatrix (); + { + glLoadIdentity (); - /* Draw the stars */ - glScalef (width, height, 1); - glCallList(gp->starlist); - check_gl_error ("drawing stars"); - } - glPopMatrix(); + glMatrixMode (GL_MODELVIEW); + glPushMatrix (); + { + glLoadIdentity (); + glOrtho (-0.5 * MI_WIDTH(mi), 0.5 * MI_WIDTH(mi), + -0.5 * MI_HEIGHT(mi), 0.5 * MI_HEIGHT(mi), + -100.0, 100.0); + glRotatef (gp->star_theta, 0.0, 0.0, 1.0); + glCallList (gp->starlist); } - glMatrixMode(GL_PROJECTION); - glPopMatrix(); - + glPopMatrix (); } - /* clean up after our state changes */ - glPopAttrib(); - check_gl_error ("glPopAttrib"); + glMatrixMode (GL_PROJECTION); + glPopMatrix (); + + glMatrixMode (GL_MODELVIEW); } @@ -392,14 +362,15 @@ init_sun (ModeInfo * mi) glLightfv (GL_LIGHT0, GL_DIFFUSE, ldif); glLightfv (GL_LIGHT0, GL_SPECULAR, spec); + check_gl_error("sun"); glMaterialfv (GL_FRONT, GL_AMBIENT, mamb); glMaterialfv (GL_FRONT, GL_DIFFUSE, mdif); glMaterialfv (GL_FRONT, GL_SPECULAR, mpec); glMaterialf (GL_FRONT, GL_SHININESS, shiny); - glEnable(GL_BLEND); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); +/* glEnable(GL_BLEND);*/ +/* glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/ glShadeModel(GL_SMOOTH); check_gl_error("lighting"); @@ -531,7 +502,6 @@ init_planet (ModeInfo * mi) { do_texture = False; do_light = False; - glEnable (GL_LINE_SMOOTH); } if (do_texture) @@ -543,9 +513,8 @@ init_planet (ModeInfo * mi) if (do_stars) init_stars (mi); - glEnable(GL_DEPTH_TEST); - glEnable(GL_CULL_FACE); - glCullFace(GL_BACK); + if (random() & 1) + star_spin = -star_spin; /* construct the polygons of the planet */ @@ -555,9 +524,8 @@ init_planet (ModeInfo * mi) glPushMatrix (); glScalef (RADIUS, RADIUS, RADIUS); glRotatef (90, 1, 0, 0); - glFrontFace(GL_CW); + glFrontFace(GL_CCW); unit_sphere (resolution, resolution, wire); - mi->polygon_count += resolution*resolution; glPopMatrix (); glEndList(); @@ -566,8 +534,9 @@ init_planet (ModeInfo * mi) gp->latlonglist = glGenLists(1); glNewList (gp->latlonglist, GL_COMPILE); glPushMatrix (); - if (do_texture) glDisable (GL_TEXTURE_2D); - if (do_light) glDisable (GL_LIGHTING); + glDisable (GL_TEXTURE_2D); + glDisable (GL_LIGHTING); + glDisable (GL_LINE_SMOOTH); glColor3f (0.1, 0.3, 0.1); glScalef (RADIUS, RADIUS, RADIUS); glScalef (1.01, 1.01, 1.01); @@ -577,8 +546,6 @@ init_planet (ModeInfo * mi) glVertex3f(0, -2, 0); glVertex3f(0, 2, 0); glEnd(); - if (do_light) glEnable(GL_LIGHTING); - if (do_texture) glEnable(GL_TEXTURE_2D); glPopMatrix (); glEndList(); } @@ -599,8 +566,21 @@ draw_planet (ModeInfo * mi) glXMakeCurrent (display, window, *(gp->glx_context)); + mi->polygon_count = 0; + if (do_stars) - draw_stars (mi); + { + draw_stars (mi); + mi->polygon_count += NUM_STARS; + } + + if (do_light) glEnable(GL_LIGHTING); + if (do_texture) glEnable(GL_TEXTURE_2D); + + glEnable (GL_LINE_SMOOTH); + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + glCullFace(GL_BACK); glPushMatrix(); @@ -630,13 +610,20 @@ draw_planet (ModeInfo * mi) } glCallList (gp->platelist); + mi->polygon_count += resolution*resolution; + if (gp->button_down_p) - glCallList (gp->latlonglist); + { + glCallList (gp->latlonglist); + mi->polygon_count += 24*24; + } glPopMatrix(); if (mi->fps_p) do_fps (mi); glFinish(); glXSwapBuffers(display, window); + + gp->star_theta += star_spin; }