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- /*
- * (c) Copyright 1993, 1994, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
- * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
- * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
- * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (c)(1)(ii) of the Rights in Technical Data and Computer Software
- * clause at DFARS 252.227-7013 and/or in similar or successor
- * clauses in the FAR or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
- extern "C" {
- #include <GL/glu.h>
- #include <GL/glx.h>
- #include <malloc.h>
- #include <math.h>
- #include <stdlib.h>
- }
-
- #include "Drip.h"
-
- Drip::Drip()
- {
- outer_color[0] = ring_color[0] = inner_color[0] = 0.0;
- outer_color[1] = ring_color[1] = inner_color[1] = 0.0;
- outer_color[2] = ring_color[2] = inner_color[2] = 0.0;
- outer_color[3] = inner_color[3] = 0.0;
- ring_color[3] = 1.0;
-
- outer_radius = 1.0;
- ring_radius = outer_radius / 2.0;
-
- divisions = 50;
- points = NULL;
-
- }
-
- void Drip::draw()
- {
- int i;
-
- glBegin(GL_TRIANGLES);
- for (i = 0; i < divisions; i++) {
- glColor4fv(inner_color);
- glVertex2f(0.0, 0.0);
- glColor4fv(ring_color);
- glVertex2f(points[2*i] * ring_radius, points[2*i + 1] * ring_radius);
- glVertex2f(points[2*((i+1) % divisions)] * ring_radius,
- points[(2*((i+1) % divisions)) + 1] * ring_radius);
- }
- glEnd();
-
- glBegin(GL_QUADS);
- for (i = 0; i < divisions; i++) {
- glColor4fv(ring_color);
- glVertex2f(points[2*i] * ring_radius, points[2*i + 1] * ring_radius);
- glVertex2f(points[2*((i+1) % divisions)] * ring_radius,
- points[(2*((i+1) % divisions)) + 1] * ring_radius);
- glColor4fv(outer_color);
- glVertex2f(points[2*((i+1) % divisions)] * outer_radius,
- points[(2*((i+1) % divisions)) + 1] * outer_radius);
- glVertex2f(points[2*i] * outer_radius, points[2*i + 1] * outer_radius);
- }
- glEnd();
-
- }
-
- void Drip::draw_starburst()
- {
- int i;
-
- glBegin(GL_TRIANGLES);
- for (i = 0; i < divisions; i++) {
- glColor4fv(inner_color);
- glVertex2f(0.0, 0.0);
- glColor4fv(ring_color);
- glVertex2f(points[2*i] * ring_radius, points[2*i + 1] * ring_radius);
- glVertex2f(points[2*((i+1) % divisions)] * ring_radius,
- points[(2*((i+1) % divisions)) + 1] * ring_radius);
- }
- glEnd();
-
- glBegin(GL_QUADS);
- for (i = 0; i < divisions; i++) {
- glColor4fv(ring_color);
- glVertex2f(points[2*i] * ring_radius, points[2*i + 1] * ring_radius);
- glVertex2f(points[2*((i+1) % divisions)] * ring_radius,
- points[(2*((i+1) % divisions)) + 1] * ring_radius);
- glColor4fv(outer_color);
- glVertex2f(points[2*i] * outer_radius, points[2*i + 1] * outer_radius);
- glVertex2f(points[2*((i+1) % divisions)] * outer_radius,
- points[(2*((i+1) % divisions)) + 1] * outer_radius);
- }
- glEnd();
-
- }
-
-
- void Drip::set_divisions(int new_divisions)
- {
- divisions = new_divisions;
- }
-
- int Drip::get_divisions() {
- return divisions;
- }
-
- void Drip::set_points(float *new_points) {
- points = new_points;
- }
-
- void Drip::alloc_points() {
- points = (float *)malloc(divisions * 2 * sizeof(*points));
- if (divisions > 0 && points == NULL) {
- fprintf(stderr, "Malloc failed.\n");
- exit(1);
- }
- }
-
-
- void Drip::fill_points() {
- int i;
- float theta;
- float delta;
-
- delta = 2.0 * M_PI / (float)divisions;
- theta = 0.0;
- for (i = 0; i < divisions; i++) {
- points[2 * i] = cos(theta);
- points[2 * i + 1] = sin(theta);
- theta += delta;
- }
- }
-
- float *Drip::get_points() {
- return points;
- }
-