1 /* GLBUBBLES (C) 1998 Richard W.M. Jones. */
3 #ifndef __bubbles3d_h__
4 #define __bubbles3d_h__
8 #endif /* HAVE_CONFIG_H */
12 # include "xlockmoreI.h" /* from the xscreensaver distribution */
13 #else /* !STANDALONE */
14 # include "xlock.h" /* from the xlockmore distribution */
15 #endif /* !STANDALONE */
24 #endif /* HAVE_JWZGLES */
26 /* Static configuration. */
27 #define GLB_SLOW_GL 0 /* Set this if you have a slow GL
28 * implementation. If you have an accelerated
29 * graphics card, set this to 0.
31 #define GLB_VERTICES_EPSILON 0.0005 /* How close are identical vertices? */
33 /* Configuration structure. */
35 int transparent_p; /* Whether to use alpha blending */
37 int subdivision_depth; /* Controls how many triangles are in
38 * each bubble. 2 and 3 are good values.
40 int nr_nudge_axes; /* Number of directions in which each
41 * bubble gets stretched. Values between
42 * 3 and 7 seem to produce good results.
44 GLfloat nudge_angle_factor; /* Max. amount of rotation in nudge angles.
45 * Controls the amount of `wobble' we see,
46 * and 0.3 seems to work well.
48 GLfloat nudge_factor; /* Max. displacement of any single nudge.
49 * Controls the amount of the wobble. Depends
50 * on NR_NUDGE_AXES, and must not exceed
51 * 1 / NR_NUDGE_AXES. 0.1 is good.
53 GLfloat rotation_factor; /* Max. amount by which bubbles rotate. */
54 int create_bubbles_every; /* How often to create new bubbles. */
55 int max_bubbles; /* Max. number of bubbles to create. */
56 double p_bubble_group[4]; /* Probabilities of creating 1, 2, 3, 4
57 * bubbles in a group. Cumulative.
59 GLfloat max_size; /* Max. size. */
60 GLfloat min_size; /* Min. size of bubbles. */
61 GLfloat max_speed; /* Max. speed. */
62 GLfloat min_speed; /* Min. speed of bubbles. */
63 GLfloat scale_factor; /* Factor by which bubbles scale from bottom
64 * of screen to top. 1.5 - 2.0 are OK.
66 GLfloat screen_bottom; /* Bottom of screen. */
67 GLfloat screen_top; /* Top of screen. */
68 GLfloat bubble_colour[4]; /* Colour of the bubbles. */
73 extern struct glb_config glb_config;
75 #define glb_drand() ((double)LRAND() / (double)MAXRAND)
77 /*-- From glb_sphere.c. --*/
78 typedef struct glb_data glb_data;
79 typedef GLfloat glb_vertex[3];
80 typedef GLuint glb_triangle[3];
81 extern glb_data * glb_sphere_init(void);
82 extern glb_vertex *glb_sphere_get_vertices(glb_data *, int *nr_vertices);
83 extern glb_triangle *glb_sphere_get_triangles(glb_data *, int *nr_triangles);
84 extern void glb_sphere_end(glb_data *);
86 /*-- From glb_bubble.c. --*/
87 extern void *glb_bubble_new(glb_data *d,
88 GLfloat x, GLfloat y, GLfloat z, GLfloat scale,
89 GLfloat y_incr, GLfloat scale_incr);
90 extern void glb_bubble_delete(void *);
91 extern void glb_bubble_step(void *);
92 extern void glb_bubble_draw(glb_data *d, void *);
93 extern GLfloat glb_bubble_get_y(void *);
95 /*-- From glb_draw.c. --*/
96 extern void *glb_draw_init(void);
97 extern void glb_draw_step(void *);
98 extern void glb_draw_end(void *);
100 #endif /* __bubbles3d_h__ */