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Diffstat (limited to 'hacks/glx/extrusion.c')
| -rw-r--r-- | hacks/glx/extrusion.c | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/hacks/glx/extrusion.c b/hacks/glx/extrusion.c deleted file mode 100644 index b76edfb..0000000 --- a/hacks/glx/extrusion.c +++ /dev/null @@ -1,551 +0,0 @@ -/* -*- Mode: C; tab-width: 4 -*- */ -/* extrusion --- extrusion module for xscreensaver */ -/*- - * Permission to use, copy, modify, and distribute this software and its - * documentation for any purpose and without fee is hereby granted, - * provided that the above copyright notice appear in all copies and that - * both that copyright notice and this permission notice appear in - * supporting documentation. - * - * This file is provided AS IS with no warranties of any kind. The author - * shall have no liability with respect to the infringement of copyrights, - * trade secrets or any patents by this file or any part thereof. In no - * event will the author be liable for any lost revenue or profits or - * other special, indirect and consequential damages. - - * Revision History: - * Tue Oct 19 22:24:47 PDT 1999 Initial creation by David Konerding - * <dek@cgl.ucsf.edu> - * - * Notes: - * This screensaver requires the GLE ("OpenGL Tubing and Extrusion Library") - * which can be obtained from http://www.linas.org/gle/index.html - */ - -#ifdef STANDALONE -#define DEFAULTS "*delay: 20000 \n" \ - "*showFPS: False \n" \ - "*wireframe: False \n" - -# define release_extrusion 0 -# include "xlockmore.h" /* from the xscreensaver distribution */ -#else /* !STANDALONE */ -# include "xlock.h" /* from the xlockmore distribution */ -#endif /* !STANDALONE */ - -#ifdef USE_GL /* whole file */ - -#include "ximage-loader.h" -#include "rotator.h" -#include "gltrackball.h" -#include "extrusion.h" - -#define checkImageWidth 64 -#define checkImageHeight 64 - - -#define WIDTH 640 -#define HEIGHT 480 - -#define DEF_LIGHT "True" -#define DEF_TEXTURE "False" -#define DEF_TEX_QUAL "False" -#define DEF_MIPMAP "False" -#define DEF_NAME "RANDOM" -#define DEF_IMAGE "BUILTIN" - -static int do_light; -static int do_texture; -static int do_tex_qual; -static int do_mipmap; -static char *which_name; -static char *which_image; - -static XrmOptionDescRec opts[] = { - {"-light", ".extrusion.light", XrmoptionNoArg, "true" }, - {"+light", ".extrusion.light", XrmoptionNoArg, "false" }, - {"-texture", ".extrusion.texture", XrmoptionNoArg, "true" }, - {"+texture", ".extrusion.texture", XrmoptionNoArg, "false" }, - {"-texture", ".extrusion.texture", XrmoptionNoArg, "true" }, - {"+texture_quality", ".extrusion.texture", XrmoptionNoArg, "false" }, - {"-texture_quality", ".extrusion.texture", XrmoptionNoArg, "true" }, - {"+mipmap", ".extrusion.mipmap", XrmoptionNoArg, "false" }, - {"-mipmap", ".extrusion.mipmap", XrmoptionNoArg, "true" }, - {"-name", ".extrusion.name", XrmoptionSepArg, 0 }, - {"-image", ".extrusion.image", XrmoptionSepArg, 0 }, -}; - - -static argtype vars[] = { - {&do_light, "light", "Light", DEF_LIGHT, t_Bool}, - {&do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool}, - {&do_tex_qual, "texture_quality", "Texture_Quality", DEF_TEX_QUAL, t_Bool}, - {&do_mipmap, "mipmap", "Mipmap", DEF_MIPMAP, t_Bool}, - {&which_name, "name", "Name", DEF_NAME, t_String}, - {&which_image, "image", "Image", DEF_IMAGE, t_String}, -}; - - -static OptionStruct desc[] = -{ - {"-name num", "example 'name' to draw (helix2, helix3, helix4, joinoffset, screw, taper, twistoid)"}, - {"-/+ light", "whether to do enable lighting (slower)"}, - {"-/+ texture", "whether to apply a texture (slower)"}, - {"-image <filename>", "texture image to load"}, - {"-/+ texture_quality", "whether to use texture smoothing (slower)"}, - {"-/+ mipmap", "whether to use texture mipmap (slower)"}, -}; - -ENTRYPOINT ModeSpecOpt extrusion_opts = {countof(opts), opts, countof(vars), vars, desc}; - -#ifdef USE_MODULES -ModStruct extrusion_description = -{"extrusion", "init_extrusion", "draw_extrusion", NULL, - "draw_extrusion", "init_extrusion", NULL, &extrusion_opts, - 1000, 1, 2, 1, 4, 1.0, "", - "OpenGL extrusion", 0, NULL}; -#endif - - -/* structure for holding the extrusion data */ -typedef struct { - int screen_width, screen_height; - GLXContext *glx_context; - rotator *rot; - trackball_state *trackball; - Bool button_down_p; - Bool button2_down_p; - int mouse_start_x, mouse_start_y; - int mouse_x, mouse_y; - int mouse_dx, mouse_dy; - Window window; - XColor fg, bg; - int extrusion_number; -} extrusionstruct; - -static extrusionstruct *Extrusion = NULL; - - - -/* set up a light */ -static const GLfloat lightOnePosition[] = {40.0, 40, 100.0, 0.0}; -static const GLfloat lightOneColor[] = {0.99, 0.99, 0.00, 1.0}; - -static const GLfloat lightTwoPosition[] = {-40.0, 40, 100.0, 0.0}; -static const GLfloat lightTwoColor[] = {0.00, 0.99, 0.99, 1.0}; - -float rot_x=0, rot_y=0, rot_z=0; -float lastx=0, lasty=0; - -static float max_lastx=400, max_lasty=400; -static float min_lastx=-400, min_lasty=-400; - -struct functions { - void (*InitStuff)(void); - void (*DrawStuff)(void); - char *name; -}; - -/* currently joinoffset and twistoid look funny- - like we're looking at them from the back or something -*/ - -static const struct functions funcs_ptr[] = { - {InitStuff_helix2, DrawStuff_helix2, "helix2"}, - {InitStuff_helix3, DrawStuff_helix3, "helix3"}, - {InitStuff_helix4, DrawStuff_helix4, "helix4"}, - {InitStuff_joinoffset, DrawStuff_joinoffset, "joinoffset"}, - {InitStuff_screw, DrawStuff_screw, "screw"}, - {InitStuff_taper, DrawStuff_taper, "taper"}, - {InitStuff_twistoid, DrawStuff_twistoid, "twistoid"}, -}; - -static int num_extrusions = countof(funcs_ptr); - - -/* BEGINNING OF FUNCTIONS */ - - -static GLubyte * -Generate_Image(int *width, int *height, int *format) -{ - GLubyte *result; - int i, j, c; - int counter=0; - - *width = checkImageWidth; - *height = checkImageHeight; - result = (GLubyte *)malloc(4 * (*width) * (*height)); - - counter = 0; - for (i = 0; i < checkImageWidth; i++) { - for (j = 0; j < checkImageHeight; j++) { - c = (((((i&0x8)==0))^(((j&0x8))==0)))*255; - result[counter++] = (GLubyte) c; - result[counter++] = (GLubyte) c; - result[counter++] = (GLubyte) c; - result[counter++] = (GLubyte) 255; - } - } - - *format = GL_RGBA; - return result; -} - - -/* Create a texture in OpenGL. First an image is loaded - and stored in a raster buffer, then it's */ -static void Create_Texture(ModeInfo *mi, const char *filename) -{ - int height, width; - GLubyte *image; - int format; - - if ( !strncmp(filename, "BUILTIN", 7)) - { - BUILTIN: - image = Generate_Image(&width, &height, &format); - } - else - { - XImage *ximage = file_to_ximage (MI_DISPLAY (mi), MI_VISUAL (mi), - filename); - if (!ximage) - goto BUILTIN; - image = (GLubyte *) ximage->data; - width = ximage->width; - height = ximage->height; - format = GL_RGBA; - } - - /* GL_MODULATE or GL_DECAL depending on what you want */ - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - /* perhaps we can edge a bit more speed at the expense of quality */ - glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST); - - if (do_tex_qual) { - /* with texture_quality, the min and mag filters look *much* nice but are *much* slower */ - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); - } - else { - /* default is to do it quick and dirty */ - /* if you have mipmaps turned on, but not texture quality, nothing will happen! */ - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - } - - /* mipmaps make the image look much nicer */ - if (do_mipmap) - { - int status; - clear_gl_error(); - status = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, width, height, format, - GL_UNSIGNED_BYTE, image); - if (status) - { - const char *s = (char *) gluErrorString (status); - fprintf (stderr, "%s: error mipmapping %dx%d texture: %s\n", - progname, width, height, - (s ? s : "(unknown)")); - exit (1); - } - check_gl_error("mipmapping"); - } - else - { - clear_gl_error(); - glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, - format, GL_UNSIGNED_BYTE, image); - check_gl_error("texture"); - } -} - - -static void -init_rotation (ModeInfo *mi) -{ - extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; - double spin_speed = 0.5; - gp->rot = make_rotator (spin_speed, spin_speed, spin_speed, - 0.2, - 0.005, - True); - gp->trackball = gltrackball_init (True); - - lastx = (random() % (int) (max_lastx - min_lastx)) + min_lastx; - lasty = (random() % (int) (max_lasty - min_lasty)) + min_lasty; -} - - -/* draw the extrusion once */ -ENTRYPOINT void -draw_extrusion(ModeInfo * mi) -{ - extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; - Display *display = MI_DISPLAY(mi); - Window window = MI_WINDOW(mi); - - static const GLfloat color[4] = {0.6, 0.6, 0.4, 1.0}; - /* static const GLfloat spec[4] = {0.6, 0.6, 0.6, 1.0}; */ - /* static const GLfloat shiny = 40.0; */ - - double x, y, z; - - if (!gp->glx_context) - return; - - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *gp->glx_context); - - glPushMatrix(); - - gltrackball_rotate (gp->trackball); - - get_rotation (gp->rot, &x, &y, &z, - !(gp->button_down_p || gp->button2_down_p)); - 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); - - /* track the mouse only if a button is down. */ - if (gp->button2_down_p) - { - gp->mouse_dx += gp->mouse_x - gp->mouse_start_x; - gp->mouse_dy += gp->mouse_y - gp->mouse_start_y; - gp->mouse_start_x = gp->mouse_x; - gp->mouse_start_y = gp->mouse_y; - } - - { - float scale = (max_lastx - min_lastx); - get_position (gp->rot, &x, &y, &z, - !(gp->button_down_p || gp->button2_down_p)); - lastx = x * scale + min_lastx + gp->mouse_dx; - lasty = y * scale + min_lasty + gp->mouse_dy; - } - - glScalef(0.5, 0.5, 0.5); - - /* glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR, spec); */ - /* glMateriali (GL_FRONT_AND_BACK, GL_SHININESS, shiny); */ - - glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color); - glFrontFace(GL_CCW); - - funcs_ptr[gp->extrusion_number].DrawStuff(); - - glPopMatrix(); - - if (mi->fps_p) do_fps (mi); - glXSwapBuffers(display, window); -} - - -/* set up lighting conditions */ -static void -SetupLight(void) -{ - glLightfv (GL_LIGHT0, GL_POSITION, lightOnePosition); - glLightfv (GL_LIGHT0, GL_DIFFUSE, lightOneColor); - glLightfv (GL_LIGHT1, GL_POSITION, lightTwoPosition); - glLightfv (GL_LIGHT1, GL_DIFFUSE, lightTwoColor); - - glEnable (GL_LIGHT0); - glEnable (GL_LIGHT1); - glEnable (GL_LIGHTING); - - glColorMaterial (GL_FRONT, GL_DIFFUSE); - glColorMaterial (GL_BACK, GL_DIFFUSE); - glEnable (GL_COLOR_MATERIAL); -} - -/* Standard reshape function */ -ENTRYPOINT void -reshape_extrusion (ModeInfo *mi, int width, int height) -{ - GLfloat h = (GLfloat) height / (GLfloat) width; - int y = 0; - - if (width > height * 5) { /* tiny window: show middle */ - height = width * 9/16; - y = -height/2; - h = height / (GLfloat) width; - } - - glViewport (0, y, (GLint) width, (GLint) height); - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluPerspective (30.0, 1/h, 1.0, 100.0); - - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - gluLookAt( 0.0, 0.0, 30.0, - 0.0, 0.0, 0.0, - 0.0, 1.0, 0.0); - - glClear(GL_COLOR_BUFFER_BIT); -} - - -/* decide which extrusion example to run */ -static void -chooseExtrusionExample (ModeInfo *mi) -{ - extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; - int i; - /* call the extrusion init routine */ - - if (!strncmp(which_name, "RANDOM", strlen(which_name))) { - gp->extrusion_number = random() % num_extrusions; - } - else { - gp->extrusion_number=-1; - for (i=0; i < num_extrusions; i++) { - if (!strncmp(which_name, funcs_ptr[i].name, strlen(which_name))) { - gp->extrusion_number = i; - } - } - } - - if (gp->extrusion_number < 0 || gp->extrusion_number >= num_extrusions) { - fprintf(stderr, "%s: invalid extrusion example number!\n", progname); - fprintf(stderr, "%s: known extrusions:\n", progname); - for (i=0; i < num_extrusions; i++) - fprintf(stderr,"\t%s\n", funcs_ptr[i].name); - exit(1); - } - init_rotation(mi); - funcs_ptr[gp->extrusion_number].InitStuff(); -} - - -/* main OpenGL initialization routine */ -static void -initializeGL(ModeInfo *mi, GLsizei width, GLsizei height) -{ - int style; - int mode; - - reshape_extrusion(mi, width, height); - glViewport( 0, 0, width, height ); - - glEnable(GL_DEPTH_TEST); - glDisable (GL_CULL_FACE); - glLightModeli (GL_LIGHT_MODEL_TWO_SIDE, True); - glShadeModel(GL_SMOOTH); - -# ifdef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */ - MI_IS_WIREFRAME(mi) = 0; -# endif - - if (do_light) - SetupLight(); - if (MI_IS_WIREFRAME(mi)) { - glPolygonMode(GL_FRONT,GL_LINE); - glPolygonMode(GL_BACK,GL_LINE); - } - if (do_texture) { - Create_Texture(mi, which_image); - glEnable(GL_TEXTURE_2D); - - /* configure the pipeline */ - style = TUBE_JN_CAP; - style |= TUBE_CONTOUR_CLOSED; - style |= TUBE_NORM_FACET; - style |= TUBE_JN_ANGLE; - gleSetJoinStyle (style); - - if (do_texture) { - mode = GLE_TEXTURE_ENABLE | GLE_TEXTURE_VERTEX_MODEL_FLAT; - glMatrixMode (GL_TEXTURE); glLoadIdentity (); - glScalef (0.25, 0.1, 1); glMatrixMode (GL_MODELVIEW); - gleTextureMode (mode); - } - } - -} - -ENTRYPOINT Bool -extrusion_handle_event (ModeInfo *mi, XEvent *event) -{ - extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; - - if (event->xany.type == ButtonPress && - (event->xbutton.button == Button4 || - event->xbutton.button == Button5 || - event->xbutton.button == Button6 || - event->xbutton.button == Button7)) - { - } - else if (event->xany.type == ButtonPress && /* rotate with left button */ - !event->xbutton.state) /* if no modifier keys */ - { - } - else if (event->xany.type == ButtonPress) /* deform with other buttons */ - { /* or with modifier keys */ - gp->button2_down_p = True; - } - else if (event->xany.type == ButtonRelease) - { - gp->button_down_p = False; - gp->button2_down_p = False; - } - else if (event->xany.type == MotionNotify) - { - if (gp->button2_down_p) - { - gp->mouse_x = event->xmotion.x; - gp->mouse_y = event->xmotion.y; - } - } - - if (gltrackball_event_handler (event, gp->trackball, - MI_WIDTH (mi), MI_HEIGHT (mi), - &gp->button_down_p)) - return True; - - return False; -} - - -/* xextrusion initialization routine */ -ENTRYPOINT void -init_extrusion (ModeInfo * mi) -{ - int screen = MI_SCREEN(mi); - extrusionstruct *gp; - - if (MI_IS_WIREFRAME(mi)) do_light = 0; - - MI_INIT(mi, Extrusion); - gp = &Extrusion[screen]; - - gp->window = MI_WINDOW(mi); - if ((gp->glx_context = init_GL(mi)) != NULL) { - reshape_extrusion(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - initializeGL(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - chooseExtrusionExample(mi); - } else { - MI_CLEARWINDOW(mi); - } - -} - - -ENTRYPOINT void -free_extrusion (ModeInfo * mi) -{ - extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; - if (!gp->glx_context) return; - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *gp->glx_context); - if (gp->trackball) gltrackball_free (gp->trackball); - if (gp->rot) free_rotator (gp->rot); -} - -XSCREENSAVER_MODULE ("Extrusion", extrusion) - -#endif /* USE_GL */ |