#include <GL/glut.h>
#include "showroom.h"
#include "3ds.h"										
#include "3dUnit.h"
#include "3dStructs.h"

/*########################### Showroom.cpp ###########################
# Load the file "test.3ds" and lets you rotate and scale the model
# Texturing not yet implemented
# $Author: Johannes Bader
# $Revision: 1.0
# $Date: 5.5.04
###################################################################### */


int   g_ViewMode	  = GL_LINE_STRIP;	/* drawing mode */
bool  g_bLighting     = false;			/* Turn lighting on initially */

static double alpha = 0;               /* azimuth */
static double beta = 0;                /* elevation */
static double zoom = 1;                /* zoom */

C3dUnit TestModel( "test.3ds" );       /* Load the Test Model */

void init( void )
{
    glClearColor( 0.0, 0.0, 0.0, 0.0 );
    glShadeModel( GL_FLAT );
    /* Use the following function to display the properties of the model */
    /* TestModel.PrintProperties(); */
    
    /* Load the 3ds File */
    TestModel.Import3ds();
}

int showroom(int argc, char** argv)
{ 
    /* Nothing special about this function */
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB );
    glutInitWindowSize( 500,500);
    glutInitWindowPosition( 100,100);
    glutCreateWindow( "Showroom" );
    init();
    glutDisplayFunc( display );
    glutReshapeFunc( reshape );
    glutKeyboardFunc( keyboard );
    glutMainLoop();
    return 0;    
}

void keyboard( unsigned char key, int x, int y )
{
    /* Use the following keys to control the Model */
    switch( key ) {
        case 'a':
            alpha += 5; break;
        case 'd':
            alpha -= 5; break;
        case 'w':
            zoom = zoom*1.1; break;
        case 's':
            zoom = zoom/1.1;
            if( zoom <= 0.0 ) zoom = 0.001; break;
        case 'q': 
            beta += 5; break;
        case 'e':
            beta -= 5; break;
        case 'y':
            if(g_ViewMode == GL_TRIANGLES) {				// We our drawing mode is at triangles
                g_ViewMode = GL_LINE_STRIP;					// Go to line stips
            } else {
                g_ViewMode = GL_TRIANGLES;					// Go to triangles
		    }
		    break;
    }
    /* After changing the viewing postition -> redisplay */
    glutPostRedisplay();
}

void display( void )
{
    /* Standart */
    glClear( GL_COLOR_BUFFER_BIT);
    glColor3f( 1.0, 1.0, 1.0 );
    
    /* Rotate azimuth, elevation and scale */
    glPushMatrix();
    gluLookAt( 5, 0, 0, 0.0, 0.0, 0.0, 0.0, 1, 0.0 );
    glRotatef( (GLfloat)beta, 0.0, 0.0, 1.0 );
    glRotatef( (GLfloat)alpha, 0.0, 1.0, 0.0 );
    glScalef( zoom,zoom,zoom);

    /* Use this function to draw a Unit with g_ViewMode */
    TestModel.Draw( g_ViewMode ); 
    
    glPopMatrix();
    glutSwapBuffers();
}


void reshape( int w, int h )
{
    /* Standart */
    glViewport( 0,0,(GLsizei) w, (GLsizei) h );
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    glFrustum( -1.0,1.0,-1.0,1.0,1.5,20.0);
    glMatrixMode( GL_MODELVIEW);
}