cone_procs.adb
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上传日期:2007-05-28
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- --
- -- (c) Copyright 1993,1994,1995,1996 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- -- Unpublished-- rights reserved under the copyright laws of the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.
- --
- with GL; use GL;
- with GLU; use GLU;
- package body Cone_Procs is
- procedure DoInit is
- mat_ambient : array (0 .. 3) of aliased GLfloat :=
- (0.2, 0.2, 0.2, 1.0);
- mat_diffuse : array (0 .. 3) of aliased GLfloat :=
- (0.8, 0.8, 0.8, 1.0);
- -- Specular and Shininess are not default values
- mat_specular : array (0 .. 3) of aliased GLfloat :=
- (1.0, 1.0, 1.0, 1.0);
- mat_shininess : aliased GLfloat := 50.0;
- light_ambient : array (0 .. 3) of aliased GLfloat :=
- (0.0, 0.0, 0.0, 1.0);
- light_diffuse : array (0 .. 3) of aliased GLfloat :=
- (1.0, 1.0, 1.0, 1.0);
- light_specular : array (0 .. 3) of aliased GLfloat :=
- (1.0, 1.0, 1.0, 1.0);
- light_position : array (0 .. 3) of aliased GLfloat :=
- (1.0, 1.0, 1.0, 0.0);
- lmodel_ambient : array (0 .. 3) of aliased GLfloat :=
- (0.2, 0.2, 0.2, 1.0);
- begin
- glMaterialfv (GL_FRONT, GL_AMBIENT, mat_ambient (0)'Access);
- glMaterialfv (GL_FRONT, GL_DIFFUSE, mat_diffuse (0)'Access);
- glMaterialfv (GL_FRONT, GL_SPECULAR, mat_specular (0)'Access);
- glMaterialfv (GL_FRONT, GL_SHININESS, mat_shininess'Access);
- glLightfv (GL_LIGHT0, GL_AMBIENT, light_ambient (0)'Access);
- glLightfv (GL_LIGHT0, GL_DIFFUSE, light_diffuse (0)'Access);
- glLightfv (GL_LIGHT0, GL_SPECULAR, light_specular (0)'Access);
- glLightfv (GL_LIGHT0, GL_POSITION, light_position (0)'Access);
- glLightModelfv (GL_LIGHT_MODEL_AMBIENT, lmodel_ambient (0)'Access);
- glEnable (GL_LIGHTING);
- glEnable (GL_LIGHT0);
- glEnable (GL_DEPTH_TEST);
- end DoInit;
- procedure solidCone (base : Float; height : Float) is
- quadObj : GLUquadricObj_Ptr;
- begin
- quadObj := gluNewQuadric;
- gluQuadricDrawStyle (quadObj, GLU_FILL);
- gluQuadricNormals (quadObj, GLU_SMOOTH);
- gluCylinder (quadObj, GLdouble(base), 0.0, GLdouble(height), 15, 10);
- gluDeleteQuadric (quadObj);
- end solidCone;
- procedure DoDisplay is
- begin
- glClear (GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
- glPushMatrix;
- glTranslatef (0.0, -1.0, 0.0);
- glRotatef (250.0, 1.0, 0.0, 0.0);
- solidCone (1.0, 2.0);
- glPopMatrix;
- glFlush;
- end DoDisplay;
- procedure ReshapeCallback (w : Integer; h : Integer) is
- begin
- glViewport (0, 0, GLsizei(w), GLsizei(h));
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity;
- if w <= h then
- glOrtho (-1.5, 1.5, GLdouble (-1.5*Float (h)/Float (w)),
- GLdouble (1.5*Float (h)/Float (w)), -10.0, 10.0);
- else
- glOrtho (GLdouble (-1.5*Float (w)/Float (h)),
- GLdouble (1.5*Float (w)/Float (h)), -1.5, 1.5, -10.0, 10.0);
- end if;
- glMatrixMode (GL_MODELVIEW);
- end ReshapeCallback;
- end Cone_Procs;