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/*
** draw_object function for AR tracking sample code
** uses glut functions to draw simple objects
**
*/
#include <stdio.h>
#include <string.h>
#if defined(_WIN32)
#include <windows.h>
#else
#include <strings.h>
#endif
#ifndef __APPLE__
#include <GL/gl.h>
#include <GL/glut.h>
#else
#include <OpenGL/gl.h>
#include <GLUT/glut.h>
#endif
#include <AR/gsub.h>
#include "draw_object.h"
#include "object.h"
/* material properties */
GLfloat mat_specular1
[] = {0.2, 0.0, 0.0, 1.0};
GLfloat mat_shininess1
[] = {50.0};
GLfloat mat_specular2
[] = {0.0, 0.0, 0.2, 1.0};
GLfloat mat_shininess2
[] = {25.0};
GLfloat mat_ambient1
[] = {1.0, 0.0, 0.0, 1.0};
GLfloat mat_ambient2
[] = {0.0, 0.0, 1.0, 1.0};
GLfloat mat_flash_ambient1
[] = {0.0, 1.0, 0.0, 1.0};
GLfloat mat_flash1
[] = {1.0, 0.0, 0.0, 1.0};
GLfloat mat_flash_shiny1
[] = {25.0};
GLfloat mat_flash2
[] = {0.0, 0.0, 1.0, 1.0};
GLfloat mat_flash_shiny2
[] = {50.0};
static int draw_object
( char *name
, double gl_para
[16] );
static void init_lights
( void );
/* draw the the AR objects */
int draw
( ObjectData_T
*object
, int objectnum
)
{
int i
;
double gl_para
[16];
/* calculate the viewing parameters - gl_para */
for( i
= 0; i
< objectnum
; i
++ ) {
if( object
[i
].
visible == 0 ) continue;
argConvGlpara
(object
[i
].
trans, gl_para
);
/* draw the object */
draw_object
( object
[i
].
name, gl_para
);
}
return(0);
}
/* draw the user object */
static int draw_object
( char *name
, double gl_para
[16] )
{
argDrawMode3D
();
argDraw3dCamera
( 0, 0 );
glDepthFunc
(GL_LEQUAL
);
glEnable
(GL_DEPTH_TEST
);
/* load the camera transformation matrix */
glMatrixMode
(GL_MODELVIEW
);
glLoadMatrixd
( gl_para
);
init_lights
();
/* draw the user object here
- using the object name to select the object */
if( strcmp(name
, "torus") == 0 ) {
/* set object color */
glEnable
(GL_LIGHTING
);
glEnable
(GL_LIGHT0
);
glMaterialfv
(GL_FRONT
, GL_SPECULAR
, mat_flash1
);
glMaterialfv
(GL_FRONT
, GL_SHININESS
, mat_flash_shiny1
);
glMaterialfv
(GL_FRONT
, GL_AMBIENT
, mat_ambient1
);
/* draw a simple torus */
glMatrixMode
(GL_MODELVIEW
);
glTranslatef
( 0.0, 0.0, 10.0 );
glutSolidTorus
(10.0, 40.0, 24, 24);
glDisable
( GL_LIGHTING
);
}
else if( strcmp(name
, "sphere") == 0 ) {
glEnable
(GL_LIGHTING
);
glEnable
(GL_LIGHT0
);
glMaterialfv
(GL_FRONT
, GL_SPECULAR
, mat_flash1
);
glMaterialfv
(GL_FRONT
, GL_SHININESS
, mat_flash_shiny1
);
glMaterialfv
(GL_FRONT
, GL_AMBIENT
, mat_ambient1
);
/* draw a sphere */
glMatrixMode
(GL_MODELVIEW
);
glTranslatef
( 0.0, 0.0, 40.0 );
glutSolidSphere
(40.0, 24, 24);
glDisable
( GL_LIGHTING
);
}
else if( strcmp(name
, "cube") == 0 ) {
glEnable
(GL_LIGHTING
);
glEnable
(GL_LIGHT0
);
glMaterialfv
(GL_FRONT
, GL_SPECULAR
, mat_flash2
);
glMaterialfv
(GL_FRONT
, GL_SHININESS
, mat_flash_shiny2
);
glMaterialfv
(GL_FRONT
, GL_AMBIENT
, mat_ambient2
);
glMatrixMode
(GL_MODELVIEW
);
glTranslatef
( 0.0, 0.0, 25.0 );
glutSolidCube
(50.0);
glDisable
( GL_LIGHTING
);
}
else if( strcmp(name
, "cone") == 0 ) {
glEnable
(GL_LIGHTING
);
glEnable
(GL_LIGHT0
);
glMaterialfv
(GL_FRONT
, GL_SPECULAR
, mat_flash1
);
glMaterialfv
(GL_FRONT
, GL_SHININESS
, mat_flash_shiny1
);
glMaterialfv
(GL_FRONT
, GL_AMBIENT
, mat_ambient1
);
glMatrixMode
(GL_MODELVIEW
);
glutSolidCone
(25.0, 50.0, 20, 24);
glDisable
( GL_LIGHTING
);
}
else {
printf("unknown object type!!\n");
}
glDisable
( GL_DEPTH_TEST
);
return 0;
}
/* initialize the lights in the scene */
static void init_lights
( void )
{
GLfloat light_position
[] = {0.0,-200.0,0.0,0.0};
GLfloat ambi
[] = {0.1, 0.1, 0.1, 0.1};
GLfloat lightZeroColor
[] = {0.9, 0.9, 0.9, 0.1};
glLightfv
(GL_LIGHT0
, GL_POSITION
, light_position
);
glLightfv
(GL_LIGHT0
, GL_AMBIENT
, ambi
);
glLightfv
(GL_LIGHT0
, GL_DIFFUSE
, lightZeroColor
);
}