X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fglx%2Fextrusion.c;h=7e98f5e3bf924524049e5cf24b065702a6081a73;hp=d1c8dbbb825e0838f56e219496615e3c53006f61;hb=6b1c86cf395f59389e4ece4ea8f4bea2c332745b;hpb=3d9140a05b5272fed0883a0af0a71e30ef44d47f diff --git a/hacks/glx/extrusion.c b/hacks/glx/extrusion.c index d1c8dbbb..7e98f5e3 100644 --- a/hacks/glx/extrusion.c +++ b/hacks/glx/extrusion.c @@ -22,32 +22,17 @@ * which can be obtained from http://www.linas.org/gle/index.html */ -/*- - * due to a Bug/feature in VMS X11/Intrinsic.h has to be placed before xlock. - * otherwise caddr_t is not defined correctly - */ - -#include - #ifdef HAVE_CONFIG_H #include #endif #ifdef STANDALONE -# define PROGCLASS "Screensaver" -# define HACK_INIT init_screensaver -# define HACK_DRAW draw_screensaver -# define HACK_RESHAPE reshape_screensaver -# define screensaver_opts xlockmore_opts -#define DEFAULTS "*delay: 10000 \n" \ - "*showFPS: False \n" \ - "*light: True \n" \ - "*wire: False \n" \ - "*texture: False \n" \ - "*image: BUILTIN \n" \ - "*name: RANDOM \n" \ - "*example: 0 \n" +#define DEFAULTS "*delay: 20000 \n" \ + "*showFPS: False \n" \ + "*wireframe: False \n" +# define refresh_extrusion 0 +# define release_extrusion 0 # include "xlockmore.h" /* from the xscreensaver distribution */ #else /* !STANDALONE */ # include "xlock.h" /* from the xlockmore distribution */ @@ -55,13 +40,6 @@ #ifdef USE_GL /* whole file */ -#ifdef HAVE_XPM -# include -# ifndef PIXEL_ALREADY_TYPEDEFED -# define PIXEL_ALREADY_TYPEDEFED /* Sigh, Xmu/Drawing.h needs this... */ -# endif -#endif - #ifdef HAVE_XMU # ifndef VMS # include @@ -70,88 +48,57 @@ # endif /* VMS */ #endif -#include -#include -#include -#include -#include -#include -#include -#ifdef HAVE_GLE3 -#include -#else -#include -#endif - #undef countof #define countof(x) (sizeof((x))/sizeof((*x))) +#include "xpm-ximage.h" +#include "rotator.h" +#include "gltrackball.h" +#include "extrusion.h" #define checkImageWidth 64 #define checkImageHeight 64 -extern void InitStuff_helix2(void); -extern void DrawStuff_helix2(void); -extern void InitStuff_helix3(void); -extern void DrawStuff_helix3(void); -extern void InitStuff_helix4(void); -extern void DrawStuff_helix4(void); -extern void InitStuff_joinoffset(void); -extern void DrawStuff_joinoffset(void); -extern void InitStuff_screw(void); -extern void DrawStuff_screw(void); -extern void InitStuff_taper(void); -extern void DrawStuff_taper(void); -extern void InitStuff_twistoid(void); -extern void DrawStuff_twistoid(void); - - - #define WIDTH 640 #define HEIGHT 480 #define DEF_LIGHT "True" -#define DEF_WIRE "False" #define DEF_TEXTURE "False" -#define DEF_TEXTURE_QUALITY "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_wire; static int do_texture; -static int do_texture_quality; +static int do_tex_qual; static int do_mipmap; static char *which_name; static char *which_image; static XrmOptionDescRec opts[] = { - {"-light", ".extrusion.light", XrmoptionNoArg, (caddr_t) "true" }, - {"+light", ".extrusion.light", XrmoptionNoArg, (caddr_t) "false" }, - {"-wire", ".extrusion.wire", XrmoptionNoArg, (caddr_t) "true" }, - {"+wire", ".extrusion.wire", XrmoptionNoArg, (caddr_t) "false" }, - {"-texture", ".extrusion.texture", XrmoptionNoArg, (caddr_t) "true" }, - {"+texture", ".extrusion.texture", XrmoptionNoArg, (caddr_t) "false" }, - {"-texture", ".extrusion.texture", XrmoptionNoArg, (caddr_t) "true" }, - {"+texture_quality", ".extrusion.texture", XrmoptionNoArg, (caddr_t) "false" }, - {"-texture_quality", ".extrusion.texture", XrmoptionNoArg, (caddr_t) "true" }, - {"+mipmap", ".extrusion.mipmap", XrmoptionNoArg, (caddr_t) "false" }, - {"-mipmap", ".extrusion.mipmap", XrmoptionNoArg, (caddr_t) "true" }, - {"-name", ".extrusion.name", XrmoptionSepArg, (caddr_t) NULL }, - {"-image", ".extrusion.image", XrmoptionSepArg, (caddr_t) NULL }, + {"-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[] = { - {(caddr_t *) &do_light, "light", "Light", DEF_LIGHT, t_Bool}, - {(caddr_t *) &do_wire, "wire", "Wire", DEF_WIRE, t_Bool}, - {(caddr_t *) &do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool}, - {(caddr_t *) &do_texture_quality, "texture_quality", "Texture_Quality", DEF_TEXTURE_QUALITY, t_Bool}, - {(caddr_t *) &do_mipmap, "mipmap", "Mipmap", DEF_MIPMAP, t_Bool}, - {(caddr_t *) &which_name, "name", "Name", DEF_NAME, t_String}, - {(caddr_t *) &which_image, "image", "Image", DEF_IMAGE, t_String}, + {&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}, }; @@ -159,61 +106,55 @@ static OptionStruct desc[] = { {"-name num", "example 'name' to draw (helix2, helix3, helix4, joinoffset, screw, taper, twistoid)"}, {"-/+ light", "whether to do enable lighting (slower)"}, - {"-/+ wire", "whether to do use wireframe instead of filled (faster)"}, {"-/+ texture", "whether to apply a texture (slower)"}, - {"-image ", "texture image to load (PPM or PPM4)"}, + {"-image ", "texture image to load"}, {"-/+ texture_quality", "whether to use texture smoothing (slower)"}, {"-/+ mipmap", "whether to use texture mipmap (slower)"}, }; -ModeSpecOpt screensaver_opts = {countof(opts), opts, countof(vars), vars, desc}; +ENTRYPOINT ModeSpecOpt extrusion_opts = {countof(opts), opts, countof(vars), vars, desc}; #ifdef USE_MODULES -ModStruct screensaver_description = -{"screensaver", "init_screensaver", "draw_screensaver", "release_screensaver", - "draw_screensaver", "init_screensaver", NULL, &screensaver_opts, +ModStruct extrusion_description = +{"extrusion", "init_extrusion", "draw_extrusion", "release_extrusion", + "draw_extrusion", "init_extrusion", NULL, &extrusion_opts, 1000, 1, 2, 1, 4, 1.0, "", - "OpenGL screensaver", 0, NULL}; + "OpenGL extrusion", 0, NULL}; #endif -/* structure for holding the screensaver data */ +/* 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; -} screensaverstruct; -static screensaverstruct *Screensaver = NULL; - + int extrusion_number; +} extrusionstruct; +static extrusionstruct *Extrusion = NULL; -/* convenient access to the screen width */ -static int global_width=640, global_height=480; /* set up a light */ -static GLfloat lightOnePosition[] = {40.0, 40, 100.0, 0.0}; -static GLfloat lightOneColor[] = {0.99, 0.99, 0.99, 1.0}; +static const GLfloat lightOnePosition[] = {40.0, 40, 100.0, 0.0}; +static const GLfloat lightOneColor[] = {0.99, 0.99, 0.00, 1.0}; -static GLfloat lightTwoPosition[] = {-40.0, 40, 100.0, 0.0}; -static GLfloat lightTwoColor[] = {0.99, 0.99, 0.99, 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; -static float dx=0, dy=0, dz=0; -static float ddx=0, ddy=0, ddz=0; -static float d_max = 0; -static int screensaver_number; - -static float max_lastx=300, max_lasty=400; -static float min_lastx=-400, min_lasty=-400; -static float d_lastx=0, d_lasty=0; -static float dd_lastx=0, dd_lasty=0; -static float max_dlastx=0, max_dlasty=0; float lastx=0, lasty=0; -static int errCode; -static GLubyte * errString; +static float max_lastx=400, max_lasty=400; +static float min_lastx=-400, min_lasty=-400; struct functions { void (*InitStuff)(void); @@ -225,7 +166,7 @@ struct functions { like we're looking at them from the back or something */ -struct functions funcs_ptr[] = { +static const struct functions funcs_ptr[] = { {InitStuff_helix2, DrawStuff_helix2, "helix2"}, {InitStuff_helix3, DrawStuff_helix3, "helix3"}, {InitStuff_helix4, DrawStuff_helix4, "helix4"}, @@ -235,27 +176,14 @@ struct functions funcs_ptr[] = { {InitStuff_twistoid, DrawStuff_twistoid, "twistoid"}, }; -static int num_screensavers = countof(funcs_ptr); +static int num_extrusions = countof(funcs_ptr); /* BEGINNING OF FUNCTIONS */ -/* check for errors, bail if any. useful for debugging */ -int checkError(int line, char *file) -{ - if((errCode = glGetError()) != GL_NO_ERROR) { - errString = (GLubyte *)gluErrorString(errCode); - fprintf(stderr, "%s: OpenGL error: %s detected at line %d in file %s\n", - progname, errString, line, file); - exit(1); - } - return 0; -} - - -/* generate a checkered image for texturing */ -GLubyte *Generate_Image(int *width, int *height, int *format) +static GLubyte * +Generate_Image(int *width, int *height, int *format) { GLubyte *result; int i, j, c; @@ -263,7 +191,7 @@ GLubyte *Generate_Image(int *width, int *height, int *format) *width = checkImageWidth; *height = checkImageHeight; - result = (GLubyte *)malloc(4 * *width * *height); + result = (GLubyte *)malloc(4 * (*width) * (*height)); counter = 0; for (i = 0; i < checkImageWidth; i++) { @@ -279,153 +207,11 @@ GLubyte *Generate_Image(int *width, int *height, int *format) *format = GL_RGBA; return result; } -/* Load a modified version of PPM format with an extra byte for alpha */ -GLubyte *LoadPPM4(const char *filename, int *width, int *height, int *format) -{ - char buff[1024]; - GLubyte *data; - int sizeX, sizeY; - FILE *fp; - int maxval; - - fp = fopen(filename, "rb"); - if (!fp) - { - fprintf(stderr, "%s: unable to open file '%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - if (!fgets(buff, sizeof(buff), fp)) - { - perror("Unable to read header filename\n"); - return Generate_Image(width, height, format); - } - - if (buff[0] != '6' || buff[1] != 'P') - { - fprintf(stderr, "%s: Invalid image format (must be `6P')\n", progname); - return Generate_Image(width, height, format); - } - - do - { - fgets(buff, sizeof(buff), fp); - } - while (buff[0] == '#'); - - if (sscanf(buff, "%d %d", &sizeX, &sizeY) != 2) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - if (fscanf(fp, "%d", &maxval) != 1) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - while (fgetc(fp) != '\n') - ; - - data = (GLubyte *)malloc(4 * sizeX * sizeY); - if (data == NULL) - { - fprintf(stderr, "%s: unable to allocate memory\n", progname); - exit(1); - } - - if (fread(data, 4 * sizeX, sizeY, fp) != sizeY) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - fclose(fp); - *width = sizeX; - *height = sizeY; - *format = GL_RGBA; - return data; -} - -/* Load a plain PPM image */ -GLubyte *LoadPPM(const char *filename, int *width, int *height, int *format) -{ - char buff[1024]; - GLubyte *data; - GLint sizeX, sizeY; - FILE *fp; - int maxval; - - fp = fopen(filename, "rb"); - if (!fp) - { - fprintf(stderr, "%s: unable to open file '%s'\n", progname, filename); - return Generate_Image(width, height, format); - exit(1); - } - if (!fgets(buff, sizeof(buff), fp)) - { - perror(filename); - return Generate_Image(width, height, format); - } - - if (buff[0] != 'P' || buff[1] != '6') - { - fprintf(stderr, "%s: invalid image format (must be `P6')\n", progname); - return Generate_Image(width, height, format); - } - - do - { - fgets(buff, sizeof(buff), fp); - } - while (buff[0] == '#'); - - if (sscanf(buff, "%d %d", &sizeX, &sizeY) != 2) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - if (fscanf(fp, "%d", &maxval) != 1) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - while (fgetc(fp) != '\n') - ; - - data = (GLubyte *)malloc(3 * sizeX * sizeY); - if (data == NULL) - { - fprintf(stderr, "%s: unable to allocate memory\n", progname); - exit(1); - } - - if (fread(data, 3 * sizeX, sizeY, fp) != sizeY) - { - fprintf(stderr, "%s: error loading image `%s'\n", progname, filename); - return Generate_Image(width, height, format); - } - - fclose(fp); - - *width = sizeX; - *height = sizeY; - *format = GL_RGB; - return data; -} - -/* create a texture to be applied to the surface - this function loads a file using a loader depending on - that extension of the file. there is very little error - checking. -*/ - -void Create_Texture(char *filename, int do_mipmap, int do_texture_quality) +/* 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; @@ -433,249 +219,145 @@ void Create_Texture(char *filename, int do_mipmap, int do_texture_quality) if ( !strncmp(filename, "BUILTIN", 7)) image = Generate_Image(&width, &height, &format); - else if ( !strncmp((filename+strlen(filename)-3), "ppm", 3)) - image = LoadPPM(filename, &width, &height, &format); - else if ( !strncmp((filename+strlen(filename)-4), "ppm4", 4)) - image = LoadPPM4(filename, &width, &height, &format); - else { - fprintf(stderr, "%s: unknown file format extension: '%s'\n", - progname, filename); - exit(1); - } + else + { + XImage *ximage = xpm_file_to_ximage (MI_DISPLAY (mi), MI_VISUAL (mi), + MI_COLORMAP (mi), filename); + 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); - /* default is to do it quick and dirty */ - /* if you have mipmaps turned on, but not texture quality, nothing will happen! */ - if (do_texture_quality) { - /* 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 { - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - } - - if (do_mipmap) { - gluBuild2DMipmaps(GL_TEXTURE_2D, format, width, height, - format, GL_UNSIGNED_BYTE, image); + 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 { - clear_gl_error(); - glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, - format, GL_UNSIGNED_BYTE, image); - check_gl_error("texture"); + /* 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); } - free(image); -} - -/* mostly lifted from lament.c */ -static void -rotate (float *pos, float *v, float *dv, float max_v) -{ - double ppos = *pos; - - /* tick position */ - if (ppos < 0) - ppos = -(ppos + *v); - else - ppos += *v; - - if (ppos > 360) - ppos -= 360; - else if (ppos < 0) - ppos += 360; - - if (ppos < 0) abort(); - if (ppos > 360) 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) + /* mipmaps make the image look much nicer */ + if (do_mipmap) { - if (random() % 4) + int status; + clear_gl_error(); + status = gluBuild2DMipmaps(GL_TEXTURE_2D, 3, width, height, format, + GL_UNSIGNED_BYTE, image); + if (status) { - *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; + 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"); } - - /* 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; - } -} - - -static void -bounce (float *pos, float *v, float *dv, float max_v) -{ - *pos += *v; - - if (*pos > 1.0) - *pos = 1.0, *v = -*v, *dv = -*dv; - else if (*pos < 0) - *pos = 0, *v = -*v, *dv = -*dv; - - if (*pos < 0.0) abort(); - if (*pos > 1.0) abort(); - - /* accelerate */ - *v += *dv; - - /* clamp velocity */ - if (*v > max_v || *v < -max_v) - { - *dv = -*dv; - } - - /* Alter direction of rotational acceleration randomly. */ - if (! (random() % 120)) - *dv = -*dv; - - /* Change acceleration very occasionally. */ - if (! (random() % 200)) + else { - if (*dv == 0) - *dv = 0.00001; - else if (random() & 1) - *dv *= 1.2; - else - *dv *= 0.8; + 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 (void) +init_rotation (ModeInfo *mi) { - rot_x = (float) (random() % (360 * 2)) - 360; /* -360 - 360 */ - rot_y = (float) (random() % (360 * 2)) - 360; - rot_z = (float) (random() % (360 * 2)) - 360; - - /* bell curve from 0-1.5 degrees, avg 0.75 */ - dx = (frand(1) + frand(1) + frand(1)) / 2.0; - dy = (frand(1) + frand(1) + frand(1)) / 2.0; - dz = (frand(1) + frand(1) + frand(1)) / 2.0; - - d_max = dx * 2; - - ddx = 0.004; - ddy = 0.004; - ddz = 0.004; + 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 (); lastx = (random() % (int) (max_lastx - min_lastx)) + min_lastx; lasty = (random() % (int) (max_lasty - min_lasty)) + min_lasty; - d_lastx = (frand(1) + frand(1) + frand(1)); - d_lasty = (frand(1) + frand(1) + frand(1)); - max_dlastx = d_lastx * 2; - max_dlasty = d_lasty * 2; - dd_lastx = 0.004; - dd_lasty = 0.004; } -/* draw the screensaver once */ -void draw_screensaver(ModeInfo * mi) +/* draw the extrusion once */ +ENTRYPOINT void +draw_extrusion(ModeInfo * mi) { - screensaverstruct *gp = &Screensaver[MI_SCREEN(mi)]; + extrusionstruct *gp = &Extrusion[MI_SCREEN(mi)]; Display *display = MI_DISPLAY(mi); Window window = MI_WINDOW(mi); - Window root, child; - int rootx, rooty, winx, winy; - unsigned int mask; - XEvent event; + 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(display, window, *(gp->glx_context)); + glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(gp->glx_context)); - funcs_ptr[screensaver_number].DrawStuff(); - - rotate(&rot_x, &dx, &ddx, d_max); - rotate(&rot_y, &dy, &ddy, d_max); - rotate(&rot_z, &dz, &ddz, d_max); + glPushMatrix(); - /* swallow any ButtonPress events */ - while (XCheckMaskEvent (MI_DISPLAY(mi), ButtonPressMask, &event)) - ; - /* check the pointer position and button state. */ - XQueryPointer (MI_DISPLAY(mi), MI_WINDOW(mi), - &root, &child, &rootx, &rooty, &winx, &winy, &mask); + 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 (mask & (Button1Mask|Button2Mask|Button3Mask|Button4Mask|Button5Mask)) + if (gp->button2_down_p) { - lastx = winx; - lasty = winy; - } - else - { - float scale = (max_lastx - min_lastx); - lastx -= min_lastx; - lasty -= min_lasty; - lastx /= scale; - lasty /= scale; - d_lastx /= scale; - d_lasty /= scale; - dd_lastx /= scale; - dd_lasty /= scale; - bounce(&lastx, &d_lastx, &dd_lastx, max_dlastx); - bounce(&lasty, &d_lasty, &dd_lasty, max_dlasty); - lastx *= scale; - lasty *= scale; - lastx += min_lastx; - lasty += min_lasty; - d_lastx *= scale; - d_lasty *= scale; - dd_lastx *= scale; - dd_lasty *= scale; + 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 */ -void SetupLight(void) +static void +SetupLight(void) { glLightfv (GL_LIGHT0, GL_POSITION, lightOnePosition); glLightfv (GL_LIGHT0, GL_DIFFUSE, lightOneColor); @@ -691,78 +373,84 @@ void SetupLight(void) glEnable (GL_COLOR_MATERIAL); } -/* reset the projection matrix */ -void resetProjection(void) { +/* Standard reshape function */ +ENTRYPOINT void +reshape_extrusion (ModeInfo *mi, int width, int height) +{ + GLfloat h = (GLfloat) height / (GLfloat) width; + + glViewport (0, 0, (GLint) width, (GLint) height); + glMatrixMode(GL_PROJECTION); glLoadIdentity(); - glFrustum (-9, 9, -9, 9, 50, 150.0); + 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); -/* Standard reshape function */ -void -reshape_screensaver(ModeInfo *mi, int width, int height) -{ - global_width=width; - global_height=height; - glViewport( 0, 0, global_width, global_height ); - resetProjection(); + glClear(GL_COLOR_BUFFER_BIT); } -/* decide which screensaver example to run */ -void chooseScreensaverExample(void) { +/* 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))) { - screensaver_number = random() % num_screensavers; + gp->extrusion_number = random() % num_extrusions; } else { - screensaver_number=-1; - for (i=0; i < num_screensavers; i++) { + gp->extrusion_number=-1; + for (i=0; i < num_extrusions; i++) { if (!strncmp(which_name, funcs_ptr[i].name, strlen(which_name))) { - screensaver_number = i; + gp->extrusion_number = i; } } } - if (screensaver_number < 0 || screensaver_number >= num_screensavers) { - fprintf(stderr, "%s: invalid screensaver example number!\n", progname); - fprintf(stderr, "%s: known screensavers:\n", progname); - for (i=0; i < num_screensavers; 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(); - funcs_ptr[screensaver_number].InitStuff(); + init_rotation(mi); + funcs_ptr[gp->extrusion_number].InitStuff(); } + /* main OpenGL initialization routine */ -void +static void initializeGL(ModeInfo *mi, GLsizei width, GLsizei height) { int style; int mode; - reshape_screensaver(mi, width, height); + reshape_extrusion(mi, width, height); glViewport( 0, 0, width, height ); glEnable(GL_DEPTH_TEST); glClearColor(0,0,0,0); -/* glCullFace(GL_BACK); */ -/* glEnable(GL_CULL_FACE); */ + glDisable (GL_CULL_FACE); + glLightModeli (GL_LIGHT_MODEL_TWO_SIDE, True); glShadeModel(GL_SMOOTH); if (do_light) SetupLight(); - if (do_wire) { + if (MI_IS_WIREFRAME(mi)) { glPolygonMode(GL_FRONT,GL_LINE); glPolygonMode(GL_BACK,GL_LINE); } if (do_texture) { - Create_Texture(which_image, do_mipmap, do_texture_quality); + Create_Texture(mi, which_image); glEnable(GL_TEXTURE_2D); /* configure the pipeline */ @@ -782,41 +470,88 @@ initializeGL(ModeInfo *mi, GLsizei width, GLsizei height) } -/* xscreensaver initialization routine */ -void init_screensaver(ModeInfo * mi) +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)) + { + gltrackball_mousewheel (gp->trackball, event->xbutton.button, 10, + !!event->xbutton.state); + return True; + } + else if (event->xany.type == ButtonPress && /* rotate with left button */ + !event->xbutton.state) /* if no modifier keys */ + { + gp->button_down_p = True; + gltrackball_start (gp->trackball, + event->xbutton.x, event->xbutton.y, + MI_WIDTH (mi), MI_HEIGHT (mi)); + return True; + } + else if (event->xany.type == ButtonPress) /* deform with other buttons */ + { /* or with modifier keys */ + gp->button2_down_p = True; + gp->mouse_start_x = gp->mouse_x = event->xbutton.x; + gp->mouse_start_y = gp->mouse_y = event->xbutton.y; + return True; + } + else if (event->xany.type == ButtonRelease) + { + gp->button_down_p = False; + gp->button2_down_p = False; + return True; + } + else if (event->xany.type == MotionNotify) + { + if (gp->button_down_p) + gltrackball_track (gp->trackball, + event->xmotion.x, event->xmotion.y, + MI_WIDTH (mi), MI_HEIGHT (mi)); + if (gp->button2_down_p) + { + gp->mouse_x = event->xmotion.x; + gp->mouse_y = event->xmotion.y; + } + return True; + } + + return False; +} + + +/* xextrusion initialization routine */ +ENTRYPOINT void +init_extrusion (ModeInfo * mi) { int screen = MI_SCREEN(mi); - screensaverstruct *gp; + extrusionstruct *gp; + + if (MI_IS_WIREFRAME(mi)) do_light = 0; - if (Screensaver == NULL) { - if ((Screensaver = (screensaverstruct *) calloc(MI_NUM_SCREENS(mi), sizeof (screensaverstruct))) == NULL) + if (Extrusion == NULL) { + if ((Extrusion = (extrusionstruct *) + calloc(MI_NUM_SCREENS(mi), sizeof (extrusionstruct))) == NULL) return; } - gp = &Screensaver[screen]; + gp = &Extrusion[screen]; gp->window = MI_WINDOW(mi); if ((gp->glx_context = init_GL(mi)) != NULL) { - reshape_screensaver(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); + reshape_extrusion(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); initializeGL(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - chooseScreensaverExample(); + chooseExtrusionExample(mi); } else { MI_CLEARWINDOW(mi); } } -/* all sorts of nice cleanup code should go here! */ -void release_screensaver(ModeInfo * mi) -{ - int screen; - if (Screensaver != NULL) { - for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) { - /* screensaverstruct *gp = &Screensaver[screen];*/ - } - (void) free((void *) Screensaver); - Screensaver = NULL; - } - FreeAllGL(mi); -} -#endif +XSCREENSAVER_MODULE ("Extrusion", extrusion) +#endif /* USE_GL */