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package demos.nurbs.curveapp;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.glu.*;
import com.jogamp.opengl.util.GLUT;
/**
* Listener raacting to OpenGL canvas events
* Listener reagující na události na OpenGL plátně
* @author Tomáš Hráský
*
*/
public class GLListener implements GLEventListener {
/**
* OpenGL object
* objekt realizující základní OpenGL funkce
*/
private GL gl;
/**
* GLU
* Objekt realizující funkce nadstavbové knihovny GLU
*/
private GLU glu;
/**
* GLUT object
* Objekt realizující funkce nadstavbové knihovny GLUT
*/
private GLUT glut;
/**
* NURBS curve object
* OpenGL Objekt NURBS křivky
*/
private GLUnurbs nurbs;
/* (non-Javadoc)
* @see com.jogamp.opengl.GLEventListener#init(com.jogamp.opengl.GLAutoDrawable)
*/
public void init(GLAutoDrawable drawable) {
this.gl = drawable.getGL();
this.glu = new GLU();
this.glut=new GLUT();
this.nurbs = glu.gluNewNurbsRenderer();
gl.glClearColor(1, 1, 1, 1);
}
public void dispose(GLAutoDrawable drawable) {
this.gl = null;
this.glu = null;
this.glut=null;
this.nurbs = null;
}
/* (non-Javadoc)
* @see com.jogamp.opengl.GLEventListener#display(com.jogamp.opengl.GLAutoDrawable)
*/
public void display(GLAutoDrawable drawable) {
gl.glClear(GL.GL_COLOR_BUFFER_BIT);
gl.glMatrixMode(GL2ES1.GL_MODELVIEW);
gl.glLoadIdentity();
float[] knots = Curve.getInstance().getKnots();
float[] ctrlpoints = Curve.getInstance().getCtrlPoints();
gl.glEnable(GL.GL_LINE_SMOOTH);
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
gl.glHint(GL.GL_LINE_SMOOTH_HINT, GL.GL_DONT_CARE);
gl.glLineWidth(3);
if(Curve.getInstance().isCurveFinished()){
glu.gluBeginCurve(nurbs);
glu.gluNurbsCurve(nurbs, knots.length, knots, 4, ctrlpoints, Curve.getInstance().getOrder(), GL.GL_MAP1_VERTEX_4);
glu.gluEndCurve(nurbs);
}
gl.glColor3f(0,0,0);
gl.glPointSize(5);
gl.glBegin(GL.GL_POINTS);
for (int i = 0; i < ctrlpoints.length / 4; i++) {
// if(i!=Curve.getInstance().getBodIndex())
gl.glVertex3d(ctrlpoints[i * 4]/ctrlpoints[i * 4 + 3], ctrlpoints[i * 4 + 1]/ctrlpoints[i * 4 + 3],
ctrlpoints[i * 4 + 2]/ctrlpoints[i * 4 + 3]);
}
gl.glEnd();
for (int i = 0; i < ctrlpoints.length / 4; i++) {
// if(i!=Curve.getInstance().getBodIndex())
// gl.glPushMatrix();
gl.glRasterPos2f(ctrlpoints[i * 4]/ctrlpoints[i * 4 + 3], ctrlpoints[i * 4 + 1]/ctrlpoints[i * 4 + 3]-5);
glut.glutBitmapString(GLUT.BITMAP_HELVETICA_18,String.valueOf(i+1));
// gl.glPopMatrix();
}
gl.glLineWidth(1);
gl.glBegin(GL.GL_LINE_STRIP);
for (int i = 0; i < ctrlpoints.length / 4; i++) {
// if(i!=Curve.getInstance().getBodIndex())
gl.glVertex3d(ctrlpoints[i * 4]/ctrlpoints[i * 4 + 3], ctrlpoints[i * 4 + 1]/ctrlpoints[i * 4 + 3],
ctrlpoints[i * 4 + 2]/ctrlpoints[i * 4 + 3]);
}
gl.glEnd();
gl.glColor3f(0,0,1);
if(Curve.getInstance().getBodIndex()>=0){
gl.glPointSize(8);
gl.glBegin(GL.GL_POINTS);
int i=Curve.getInstance().getBodIndex();
gl.glVertex3d(ctrlpoints[i * 4]/ctrlpoints[i * 4 + 3], ctrlpoints[i * 4 + 1]/ctrlpoints[i * 4 + 3],
ctrlpoints[i * 4 + 2]/ctrlpoints[i * 4 + 3]);
gl.glEnd();
}
}
/* (non-Javadoc)
* @see com.jogamp.opengl.GLEventListener#reshape(com.jogamp.opengl.GLAutoDrawable, int, int, int, int)
*/
public void reshape(GLAutoDrawable drawable, int x, int y, int width,
int height) {
gl.glMatrixMode(GL2ES1.GL_PROJECTION);
gl.glLoadIdentity();
gl.glOrtho(0, drawable.getWidth(), 0, drawable.getHeight(), -1, 1);
gl.glScalef(1, -1, 1);
gl.glTranslatef(0, -drawable.getHeight(), 0);
}
/* (non-Javadoc)
* @see com.jogamp.opengl.GLEventListener#displayChanged(com.jogamp.opengl.GLAutoDrawable, boolean, boolean)
*/
public void displayChanged(GLAutoDrawable arg0, boolean arg1, boolean arg2) {
}
}
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