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 1 /* 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_USE_BLENDING 0 /* Use alpha feature to create see-through
26 #define GLB_VERTICES_EPSILON 0.0005 /* How close are identical vertices? */
28 /* Configuration structure. */
30 int subdivision_depth; /* Controls how many triangles are in
31 * each bubble. 2 and 3 are good values.
33 int nr_nudge_axes; /* Number of directions in which each
34 * bubble gets stretched. Values between
35 * 3 and 7 seem to produce good results.
37 GLfloat nudge_angle_factor; /* Max. amount of rotation in nudge angles.
38 * Controls the amount of `wobble' we see,
39 * and 0.3 seems to work well.
41 GLfloat nudge_factor; /* Max. displacement of any single nudge.
42 * Controls the amount of the wobble. Depends
43 * on NR_NUDGE_AXES, and must not exceed
44 * 1 / NR_NUDGE_AXES. 0.1 is good.
46 GLfloat rotation_factor; /* Max. amount by which bubbles rotate. */
47 int create_bubbles_every; /* How often to create new bubbles. */
48 int max_bubbles; /* Max. number of bubbles to create. */
49 double p_bubble_group[4]; /* Probabilities of creating 1, 2, 3, 4
50 * bubbles in a group. Cumulative.
52 GLfloat max_size; /* Max. size. */
53 GLfloat min_size; /* Min. size of bubbles. */
54 GLfloat max_speed; /* Max. speed. */
55 GLfloat min_speed; /* Min. speed of bubbles. */
56 GLfloat scale_factor; /* Factor by which bubbles scale from bottom
57 * of screen to top. 1.5 - 2.0 are OK.
59 GLfloat screen_bottom; /* Bottom of screen. */
60 GLfloat screen_top; /* Top of screen. */
61 GLfloat bg_colour[4]; /* Background colour. */
62 GLfloat bubble_colour[4]; /* Colour of the bubbles. */
65 extern struct glb_config glb_config;
67 #define glb_drand() ((double)LRAND() / (double)MAXRAND)
69 /*-- From glb_sphere.c. --*/
70 typedef GLfloat glb_vertex[3];
71 typedef GLuint glb_triangle[3];
72 extern void glb_sphere_init(void);
73 extern glb_vertex *glb_sphere_get_vertices(int *nr_vertices);
74 extern glb_triangle *glb_sphere_get_triangles(int *nr_triangles);
75 extern void glb_sphere_end(void);
77 /*-- From glb_bubble.c. --*/
78 extern void *glb_bubble_new(GLfloat x, GLfloat y, GLfloat z, GLfloat scale,
79 GLfloat y_incr, GLfloat scale_incr);
80 extern void glb_bubble_delete(void *);
81 extern void glb_bubble_step(void *);
82 extern void glb_bubble_draw(void *);
83 extern GLfloat glb_bubble_get_y(void *);
85 /*-- From glb_draw.c. --*/
86 extern void *glb_draw_init(void);
87 extern void glb_draw_step(void *);
88 extern void glb_draw_end(void *);
90 #endif /* __bubbles3d_h__ */