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/*
* Leo Chan
*
* October 1995
*
* -----------
*
* Sven Goethel
* September 1997
*
* @version 1.0, 23. JUNI 1998
*/
import gl4java.awt.*;
import java.awt.*;
import java.awt.event.*;
class starCvs extends GLAnimCanvas
{
protected int FrameStep =0;
float lmodel_twoside[] = null;
float lmodel_local[] = null;
float lmodel_ambient[] = null;
public starCvs(int w, int h, String glClass, String gluClass)
{
super( w, h, glClass, gluClass);
}
public void init()
{
lmodel_twoside= new float[4];
lmodel_twoside[0]=0f;
lmodel_twoside[1]=0f;
lmodel_twoside[2]=0f;
lmodel_twoside[3]=0f;
lmodel_local= new float[4];
lmodel_local[0]=0f;
lmodel_local[1]=0f;
lmodel_local[2]=0f;
lmodel_local[3]=0f;
lmodel_ambient= new float[4];
lmodel_ambient[0]=0f;
lmodel_ambient[1]=0f;
lmodel_ambient[2]=0f;
lmodel_ambient[3]=0f;
/* initialize the widget */
gl.glClearColor( 0.8f, 0.8f, 1.0f, 1.0f );
gl.glFrontFace( GL_CW );
gl.glEnable( GL_DEPTH_TEST );
int width = cvsGetWidth();
int height = cvsGetHeight();
gl.glViewport( 0, 0, width, height );
gl.glMatrixMode( GL_PROJECTION );
gl.glLoadIdentity();
double fov = 45.0,
aspect = width / height,
near = 1.0,
far = 200.0;
glu.gluPerspective( fov, aspect, near, far );
gl.glMatrixMode( GL_MODELVIEW );
gl.glLoadIdentity();
/* render three rotated cylinders */
gl.glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
float lightArr[] = new float[4];
float farr[] = new float[4];
/* enable lighting */
lightArr[0] = 1.0f; lightArr[1] = 1.0f;
lightArr[2] = 1.0f; lightArr[3] = 1.0f;
gl.glLightfv( GL_LIGHT0, GL_DIFFUSE, lightArr );
lightArr[0] = 90.0f; lightArr[1] = 90.0f;
lightArr[2] = 0.0f; lightArr[3] = 0.0f;
gl.glLightfv( GL_LIGHT0, GL_POSITION, lightArr );
lightArr[0] = 0.1f; lightArr[1] = 0.1f;
lightArr[2] = 0.1f; lightArr[3] = 1.0f;
gl.glLightfv( GL_LIGHT0, GL_AMBIENT, lightArr );
gl.glLightModeli( GL_LIGHT_MODEL_TWO_SIDE,
1 );
gl.glEnable( GL_LIGHT0 );
/*
gl.glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, lmodel_local);
gl.glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
*/
gl.glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
gl.glEnable( GL_LIGHTING );
gl.glMaterialf( GL_FRONT, GL_SHININESS, 30.0f );
farr[0] = 0.0f; farr[1] = 0.0f; farr[2] = 0.0f; farr[3] = 1.0f;
gl.glMaterialfv( GL_FRONT, GL_SPECULAR, farr );
farr[0] = 0.0f; farr[1] = 1.0f; farr[2] = 0.0f; farr[3] = 1.0f;
gl.glMaterialfv( GL_FRONT, GL_DIFFUSE, farr );
gl.glMaterialf( GL_BACK, GL_SHININESS, 50.0f );
farr[0] = 0.0f; farr[1] = 0.0f; farr[2] = 1.0f; farr[3] = 1.0f;
gl.glMaterialfv( GL_BACK, GL_SPECULAR, farr );
farr[0] = 1.0f; farr[1] = 1.0f; farr[2] = 0.0f; farr[3] = 1.0f;
gl.glMaterialfv( GL_BACK, GL_DIFFUSE, farr );
}
public void animationCalc()
{
FrameStep+=1;
if(FrameStep>100000) FrameStep=0;
}
public void display()
{
/* Standard gl4java Init */
if( glj.gljMakeCurrent() == false )
{
return;
}
gl.glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
gl.glPushMatrix();
gl.glTranslatef( 0.0f, 0.0f, -65.0f );
gl.glRotatef( 40.0f+(2f*FrameStep), 0.0f, 0.0f, 1.0f );
gl.glRotatef( 190.0f+(2f*FrameStep), 0.0f, 1.0f, 0.0f );
gl.glRotatef( 200.0f+(FrameStep*2f), 1.0f, 0.0f, 0.0f );
gl.glPushMatrix();
gl.glScalef( 1.0f, 1.0f, 10.0f );
drawCylinder();
gl.glPopMatrix();
gl.glPushMatrix();
gl.glRotatef( 90.0f, 0.0f, 1.0f, 0.0f );
gl.glScalef( 1.0f, 1.0f, 10.0f );
drawCylinder();
gl.glPopMatrix();
gl.glPushMatrix();
gl.glRotatef( 90.0f, 1.0f, 0.0f, 0.0f );
gl.glScalef( 1.0f, 1.0f, 10.0f );
drawCylinder();
gl.glPopMatrix();
gl.glPopMatrix();
glj.gljSwap();
glj.gljCheckGL();
glj.gljFree();
animationCalc() ;
}
public void drawCylinder()
{
gl.glBegin( GL_TRIANGLE_STRIP );
gl.glNormal3f ( 1.0f, 0.0f, -5.0f);
gl.glVertex3f ( 1.0f, 0.0f, -5.0f);
gl.glNormal3f ( 1.0f, 0.0f, -5.0f);
gl.glVertex3f (1.000000f, 0.000000f, 5.000000f);
gl.glNormal3f (0.707107f, 0.707107f, -5.000000f);
gl.glVertex3f (0.707107f, 0.707107f, -5.000000f);
gl.glNormal3f (0.707107f, 0.707107f, -5.000000f);
gl.glVertex3f (0.707107f, 0.707107f, 5.000000f);
gl.glNormal3f (0.000000f, 1.000000f, -5.000000f);
gl.glVertex3f (0.000000f, 1.000000f, -5.000000f);
gl.glNormal3f (0.000000f, 1.000000f, -5.000000f);
gl.glVertex3f (0.000000f, 1.000000f, 5.000000f);
gl.glNormal3f (-0.707107f, 0.707107f, -5.00000f);
gl.glVertex3f (-0.707107f, 0.707107f, -5.00000f);
gl.glNormal3f (-0.707107f, 0.707107f, -5.00000f);
gl.glVertex3f (-0.707107f, 0.707107f, 5.00000f);
gl.glNormal3f (-1.000000f, 0.000000f, -5.000000f);
gl.glVertex3f (-1.000000f, 0.000000f, -5.000000f);
gl.glNormal3f (-1.000000f, 0.000000f, -5.000000f);
gl.glVertex3f (-1.000000f, 0.000000f, 5.00000f);
gl.glNormal3f (-0.707107f, -0.707107f, -5.000000f);
gl.glVertex3f (-0.707107f, -0.707107f, -5.000000f);
gl.glNormal3f (-0.707107f, -0.707107f, -5.000000f);
gl.glVertex3f (-0.707107f, -0.707107f, 5.00000f);
gl.glNormal3f (0.000000f, -1.000000f, -5.000000f);
gl.glVertex3f (0.000000f, -1.000000f, -5.000000f);
gl.glNormal3f (0.000000f, -1.000000f, -5.000000f);
gl.glVertex3f (0.000000f, -1.000000f, 5.00000f);
gl.glNormal3f (0.707107f, -0.707107f, -5.00000f);
gl.glVertex3f (0.707107f, -0.707107f, -5.00000f);
gl.glNormal3f (0.707107f, -0.707107f, -5.00000f);
gl.glVertex3f (0.707107f, -0.707107f, 5.000000f);
gl.glNormal3f (1.000000f, 0.000000f, -5.00000f);
gl.glVertex3f (1.000000f, 0.000000f, -5.00000f);
gl.glNormal3f (1.000000f, 0.000000f, -5.00000f);
gl.glVertex3f (1.000000f, 0.000000f, 5.00000f);
gl.glEnd();
}
}
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