/** Draws circular particle using a display list. */
public void display(GL gl) {
if (PARTICLE_DISPLAY_LIST < 0) { // MAKE DISPLAY LIST:
int displayListIndex = gl.glGenLists(1);
gl.glNewList(displayListIndex, GL.GL_COMPILE);
drawParticle(gl, new Point3d(), radius); // /particle at origin
gl.glEndList();
System.out.println("MADE LIST " + displayListIndex + " : " + gl.glIsList(displayListIndex));
PARTICLE_DISPLAY_LIST = displayListIndex;
}
// / COLOR: DEFAULT WHITE; GREEN IF HIGHLIGHTED; ADD RED IF PINNED
Color3f c = new Color3f(1, 1, 1); // default: white
if (pin) {
c.x = 1f; // add red
c.y *= 0.2f;
c.z = 0;
}
if (highlight) {
c.y = 1;
c.z = 0;
}
if (GooParticle.class.isInstance(this)) {
c.x = 0;
c.y = 0;
// now its blue
}
gl.glColor3f(c.x, c.y, c.z);
// / DRAW ORIGIN-CIRCLE TRANSLATED TO "p":
gl.glPushMatrix();
gl.glTranslated(x.x, x.y, x.z);
gl.glCallList(PARTICLE_DISPLAY_LIST);
gl.glPopMatrix();
}
/** Draws a canonical circular particle. */
private static void drawParticle(GL gl, Point3d p, double r) {
double radius = r;
double vectorY1 = p.y;
double vectorX1 = p.x;
double vectorZ1 = p.z;
GLU glu = new GLU();
GLUquadric quadratic = glu.gluNewQuadric();
glu.gluQuadricNormals(quadratic, GLU.GLU_SMOOTH);
glu.gluQuadricTexture(quadratic, true);
gl.glPushMatrix();
gl.glTranslated(p.x, p.y, p.z);
glu.gluSphere(quadratic, radius, 12, 12);
gl.glPopMatrix();
}