1 /* GLBUBBLES (C) 1998 Richard W.M. Jones. */
3 #ifndef __bubbles3d_h__
4 #define __bubbles3d_h__
6 #include <X11/Intrinsic.h>
10 # include "xlockmoreI.h" /* from the xscreensaver distribution */
11 #else /* !STANDALONE */
12 # include "xlock.h" /* from the xlockmore distribution */
13 #endif /* !STANDALONE */
18 /* Static configuration. */
19 #define GLB_SLOW_GL 0 /* Set this if you have a slow GL
20 * implementation. If you have an accelerated
21 * graphics card, set this to 0.
23 #define GLB_VERTICES_EPSILON 0.0005 /* How close are identical vertices? */
25 /* Configuration structure. */
27 int transparent_p; /* Whether to use alpha blending */
29 int subdivision_depth; /* Controls how many triangles are in
30 * each bubble. 2 and 3 are good values.
32 int nr_nudge_axes; /* Number of directions in which each
33 * bubble gets stretched. Values between
34 * 3 and 7 seem to produce good results.
36 GLfloat nudge_angle_factor; /* Max. amount of rotation in nudge angles.
37 * Controls the amount of `wobble' we see,
38 * and 0.3 seems to work well.
40 GLfloat nudge_factor; /* Max. displacement of any single nudge.
41 * Controls the amount of the wobble. Depends
42 * on NR_NUDGE_AXES, and must not exceed
43 * 1 / NR_NUDGE_AXES. 0.1 is good.
45 GLfloat rotation_factor; /* Max. amount by which bubbles rotate. */
46 int create_bubbles_every; /* How often to create new bubbles. */
47 int max_bubbles; /* Max. number of bubbles to create. */
48 double p_bubble_group[4]; /* Probabilities of creating 1, 2, 3, 4
49 * bubbles in a group. Cumulative.
51 GLfloat max_size; /* Max. size. */
52 GLfloat min_size; /* Min. size of bubbles. */
53 GLfloat max_speed; /* Max. speed. */
54 GLfloat min_speed; /* Min. speed of bubbles. */
55 GLfloat scale_factor; /* Factor by which bubbles scale from bottom
56 * of screen to top. 1.5 - 2.0 are OK.
58 GLfloat screen_bottom; /* Bottom of screen. */
59 GLfloat screen_top; /* Top of screen. */
60 GLfloat bg_colour[4]; /* Background colour. */
61 GLfloat bubble_colour[4]; /* Colour of the bubbles. */
66 extern struct glb_config glb_config;
68 #define glb_drand() ((double)LRAND() / (double)MAXRAND)
70 /*-- From glb_sphere.c. --*/
71 typedef GLfloat glb_vertex[3];
72 typedef GLuint glb_triangle[3];
73 extern void glb_sphere_init(void);
74 extern glb_vertex *glb_sphere_get_vertices(int *nr_vertices);
75 extern glb_triangle *glb_sphere_get_triangles(int *nr_triangles);
76 extern void glb_sphere_end(void);
78 /*-- From glb_bubble.c. --*/
79 extern void *glb_bubble_new(GLfloat x, GLfloat y, GLfloat z, GLfloat scale,
80 GLfloat y_incr, GLfloat scale_incr);
81 extern void glb_bubble_delete(void *);
82 extern void glb_bubble_step(void *);
83 extern void glb_bubble_draw(void *);
84 extern GLfloat glb_bubble_get_y(void *);
86 /*-- From glb_draw.c. --*/
87 extern void *glb_draw_init(void);
88 extern void glb_draw_step(void *);
89 extern void glb_draw_end(void *);
91 #endif /* __bubbles3d_h__ */