96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
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#ifndef __bubbles3d_h__
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#define __bubbles3d_h__
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#if !defined( lint ) && !defined( SABER )
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/* #ident "@(#)bubble3d.h 4.14 99/06/17 xlockmore" */
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#endif
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/*-
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* Bubble3d stuff
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*
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* GLBUBBLES (C) 1998 Richard W.M. Jones.
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* See xlock.c for copying information.
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*
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* Revision History:
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* 17-06-99: Started log. :)
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*/
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#include "xlock.h"
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#include <GL/gl.h>
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#include <GL/glu.h>
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/* Static configuration. */
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#define GLB_SLOW_GL 0 /* Set this if you have a slow GL
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* implementation. If you have an accelerated
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* graphics card, set this to 0.
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*/
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#define GLB_USE_BLENDING 1 /* Use alpha feature to create see-through
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* bubbles.
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*/
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#define GLB_VERTICES_EPSILON 0.0005 /* How close are identical vertices? */
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/* Configuration structure. */
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struct glb_config {
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int subdivision_depth; /* Controls how many triangles are in
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* each bubble. 2 and 3 are good values.
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*/
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int nr_nudge_axes; /* Number of directions in which each
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* bubble gets stretched. Values between
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* 3 and 7 seem to produce good results.
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*/
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GLfloat nudge_angle_factor; /* Max. amount of rotation in nudge angles.
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* Controls the amount of `wobble' we see,
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* and 0.3 seems to work well.
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*/
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GLfloat nudge_factor; /* Max. displacement of any single nudge.
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* Controls the amount of the wobble. Depends
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* on NR_NUDGE_AXES, and must not exceed
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* 1 / NR_NUDGE_AXES. 0.1 is good.
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*/
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GLfloat rotation_factor; /* Max. amount by which bubbles rotate. */
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int create_bubbles_every; /* How often to create new bubbles. */
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int max_bubbles; /* Max. number of bubbles to create. */
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double p_bubble_group[4]; /* Probabilities of creating 1, 2, 3, 4
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* bubbles in a group. Cumulative.
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*/
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GLfloat max_size; /* Max. size. */
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GLfloat min_size; /* Min. size of bubbles. */
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GLfloat max_speed; /* Max. speed. */
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GLfloat min_speed; /* Min. speed of bubbles. */
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GLfloat scale_factor; /* Factor by which bubbles scale from bottom
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* of screen to top. 1.5 - 2.0 are OK.
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*/
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GLfloat screen_bottom; /* Bottom of screen. */
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GLfloat screen_top; /* Top of screen. */
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GLfloat bg_colour[4]; /* Background colour. */
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GLfloat bubble_colour[4]; /* Colour of the bubbles. */
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};
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extern struct glb_config glb_config;
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#define glb_drand() ((double)LRAND() / (double)MAXRAND)
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/*-- From glb_sphere.c. --*/
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typedef GLfloat glb_vertex[3];
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typedef GLuint glb_triangle[3];
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extern void glb_sphere_init(void);
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extern glb_vertex *glb_sphere_get_vertices(int *nr_vertices);
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extern glb_triangle *glb_sphere_get_triangles(int *nr_triangles);
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extern void glb_sphere_end(void);
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/*-- From glb_bubble.c. --*/
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extern void *glb_bubble_new(GLfloat x, GLfloat y, GLfloat z, GLfloat scale,
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GLfloat y_incr, GLfloat scale_incr);
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extern void glb_bubble_delete(void *);
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extern void glb_bubble_step(void *);
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extern void glb_bubble_draw(void *);
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extern GLfloat glb_bubble_get_y(void *);
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/*-- From glb_draw.c. --*/
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extern void *glb_draw_init(void);
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extern void glb_draw_step(void *);
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extern void glb_draw_end(void *);
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#endif /* __bubbles3d_h__ */
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