public void init(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
glu = new GLU();
/*
* jogl specific addition for tessellation
*/
tessellCallBack tessCallback = new tessellCallBack(gl, glu);
//
double rect[][] =
new double[][] { // [4][3] in C; reverse here
{50.0, 50.0, 0.0}, {200.0, 50.0, 0.0}, {200.0, 200.0, 0.0}, {50.0, 200.0, 0.0}
};
double tri[][] =
new double[][] { // [3][3]
{75.0, 75.0, 0.0}, {125.0, 175.0, 0.0}, {175.0, 75.0, 0.0}
};
double star[][] =
new double[][] { // [5][6]; 6x5 in java
{250.0, 50.0, 0.0, 1.0, 0.0, 1.0},
{325.0, 200.0, 0.0, 1.0, 1.0, 0.0},
{400.0, 50.0, 0.0, 0.0, 1.0, 1.0},
{250.0, 150.0, 0.0, 1.0, 0.0, 0.0},
{400.0, 150.0, 0.0, 0.0, 1.0, 0.0}
};
gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
startList = gl.glGenLists(2);
GLUtessellator tobj = glu.gluNewTess();
glu.gluTessCallback(tobj, GLU.GLU_TESS_VERTEX, tessCallback); // glVertex3dv);
glu.gluTessCallback(tobj, GLU.GLU_TESS_BEGIN, tessCallback); // beginCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_END, tessCallback); // endCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_ERROR, tessCallback); // errorCallback);
/* rectangle with triangular hole inside */
gl.glNewList(startList, GL2.GL_COMPILE);
gl.glShadeModel(GL2.GL_FLAT);
glu.gluTessBeginPolygon(tobj, null);
glu.gluTessBeginContour(tobj);
glu.gluTessVertex(tobj, rect[0], 0, rect[0]);
glu.gluTessVertex(tobj, rect[1], 0, rect[1]);
glu.gluTessVertex(tobj, rect[2], 0, rect[2]);
glu.gluTessVertex(tobj, rect[3], 0, rect[3]);
glu.gluTessEndContour(tobj);
glu.gluTessBeginContour(tobj);
glu.gluTessVertex(tobj, tri[0], 0, tri[0]);
glu.gluTessVertex(tobj, tri[1], 0, tri[1]);
glu.gluTessVertex(tobj, tri[2], 0, tri[2]);
glu.gluTessEndContour(tobj);
glu.gluTessEndPolygon(tobj);
gl.glEndList();
glu.gluTessCallback(tobj, GLU.GLU_TESS_VERTEX, tessCallback); // vertexCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_BEGIN, tessCallback); // beginCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_END, tessCallback); // endCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_ERROR, tessCallback); // errorCallback);
glu.gluTessCallback(tobj, GLU.GLU_TESS_COMBINE, tessCallback); // combineCallback);
/* smooth shaded, self-intersecting star */
gl.glNewList(startList + 1, GL2.GL_COMPILE);
gl.glShadeModel(GL2.GL_SMOOTH);
glu.gluTessProperty(
tobj, //
GLU.GLU_TESS_WINDING_RULE, //
GLU.GLU_TESS_WINDING_POSITIVE);
glu.gluTessBeginPolygon(tobj, null);
glu.gluTessBeginContour(tobj);
glu.gluTessVertex(tobj, star[0], 0, star[0]);
glu.gluTessVertex(tobj, star[1], 0, star[1]);
glu.gluTessVertex(tobj, star[2], 0, star[2]);
glu.gluTessVertex(tobj, star[3], 0, star[3]);
glu.gluTessVertex(tobj, star[4], 0, star[4]);
glu.gluTessEndContour(tobj);
glu.gluTessEndPolygon(tobj);
gl.glEndList();
glu.gluDeleteTess(tobj);
}
@Override
public void draw(final GL2 gl, final boolean picking) {
JOGLRenderer renderer = drawer.getRenderer();
gl.glColor3d(1.0, 1.0, 1.0);
if (picking) {
if (renderer.colorPicking) {
gl.glDisable(GL.GL_DITHER);
gl.glDisable(GLLightingFunc.GL_LIGHTING);
gl.glDisable(GL.GL_TEXTURE);
int viewport[] = new int[4];
gl.glGetIntegerv(GL.GL_VIEWPORT, viewport, 0);
FloatBuffer pixels = FloatBuffer.allocate(4);
gl.glReadPixels(
renderer.camera.getLastMousePressedPosition().x,
viewport[3] - renderer.camera.getLastMousePressedPosition().y,
1,
1,
GL.GL_RGBA,
GL.GL_FLOAT,
pixels);
gl.glEnable(GL.GL_DITHER);
gl.glEnable(GLLightingFunc.GL_LIGHTING);
gl.glEnable(GL.GL_TEXTURE);
// Color index = new Color(pixels.get(0), pixels.get(1), pixels.get(2));
// System.out.println("color picked " + index.toString());
} else {
gl.glPushMatrix();
gl.glInitNames();
gl.glPushName(0);
double alpha = 0d;
int size = objects.size();
double delta = size == 0 ? 0 : 1d / size;
for (final List<T> list : objects) {
alpha = alpha + delta;
for (T object : list) {
if (isFading) {
double originalAlpha = object.getAlpha();
object.setAlpha(originalAlpha * alpha);
object.draw(gl, drawer, picking);
object.setAlpha(originalAlpha);
} else {
object.draw(gl, drawer, picking);
}
}
}
gl.glPopName();
gl.glPopMatrix();
}
} else if (drawAsList) {
Integer index = openGLListIndex;
if (index == null) {
index = gl.glGenLists(1);
gl.glNewList(index, GL2.GL_COMPILE);
double alpha = 0d;
int size = objects.size();
double delta = size == 0 ? 0 : 1d / size;
for (final List<T> list : objects) {
alpha = alpha + delta;
for (T object : list) {
if (isFading) {
double originalAlpha = object.getAlpha();
object.setAlpha(originalAlpha * alpha);
object.draw(gl, drawer, picking);
object.setAlpha(originalAlpha);
} else {
object.draw(gl, drawer, picking);
}
}
}
gl.glEndList();
}
gl.glCallList(index);
openGLListIndex = index;
} else if (drawAsVBO) {
if (vah == null) {
GLU glu = renderer.getGlu();
vah = new VertexArrayHandler(gl, glu, renderer);
vah.buildVertexArray(getObjects());
} else {
// vah.loadCollada(null);
}
} else {
for (final T object : getObjects()) {
object.draw(gl, drawer, picking);
}
}
}
