public void updateSelectedOctant(GL gl, GLU glu, float[] mousePosition, float[] pickRectangle) {
// Start Picking mode
int capacity =
1 * 4 * visibleLeaves.size(); // Each object take in maximium : 4 * name stack depth
IntBuffer hitsBuffer = BufferUtil.newIntBuffer(capacity);
gl.glSelectBuffer(hitsBuffer.capacity(), hitsBuffer);
gl.glRenderMode(GL.GL_SELECT);
gl.glDisable(GL.GL_CULL_FACE); // Disable flags
gl.glInitNames();
gl.glPushName(0);
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glPushMatrix();
gl.glLoadIdentity();
glu.gluPickMatrix(
mousePosition[0],
mousePosition[1],
pickRectangle[0],
pickRectangle[1],
drawable.getViewport());
gl.glMultMatrixd(drawable.getProjectionMatrix());
gl.glMatrixMode(GL.GL_MODELVIEW);
// Draw the nodes' cube int the select buffer
int hitName = 1;
for (int i = 0; i < visibleLeaves.size(); i++) {
Octant node = visibleLeaves.get(i);
gl.glLoadName(hitName);
node.displayOctant(gl);
hitName++;
}
// Restoring the original projection matrix
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glPopMatrix();
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glFlush();
// Returning to normal rendering mode
int nbRecords = gl.glRenderMode(GL.GL_RENDER);
if (vizController.getVizModel().isCulling()) {
gl.glEnable(GL.GL_CULL_FACE);
gl.glCullFace(GL.GL_BACK);
}
// Clean previous selection
selectedLeaves.clear();
// Get the hits and put the node under selection in the selectionArray
for (int i = 0; i < nbRecords; i++) {
int hit = hitsBuffer.get(i * 4 + 3) - 1; // -1 Because of the glPushName(0)
Octant nodeHit = visibleLeaves.get(hit);
selectedLeaves.add(nodeHit);
}
}
public void updateVisibleOctant(GL2 gl) {
if (leavesCount > 0) {
// Limits
refreshLimits();
// Switch to OpenGL2 select mode
int capacity = 1 * 4 * leavesCount; // Each object take in maximium : 4 * name stack depth
IntBuffer hitsBuffer = Buffers.newDirectIntBuffer(capacity);
gl.glSelectBuffer(hitsBuffer.capacity(), hitsBuffer);
gl.glRenderMode(GL2.GL_SELECT);
gl.glInitNames();
gl.glPushName(0);
gl.glDisable(GL2.GL_CULL_FACE); // Disable flags
// Draw the nodes cube in the select buffer
for (Octant n : leaves) {
if (n != null) {
gl.glLoadName(n.leafId);
n.displayOctant(gl);
n.visible = false;
}
}
visibleLeaves = 0;
int nbRecords = gl.glRenderMode(GL2.GL_RENDER);
if (vizController.getVizModel().isCulling()) {
gl.glEnable(GL2.GL_CULL_FACE);
gl.glCullFace(GL2.GL_BACK);
}
// Get the hits and add the nodes' objects to the array
int depth = Integer.MAX_VALUE;
int minDepth = -1;
for (int i = 0; i < nbRecords; i++) {
int hit = hitsBuffer.get(i * 4 + 3); // -1 Because of the glPushName(0)
int minZ = hitsBuffer.get(i * 4 + 1);
if (minZ < depth) {
depth = minZ;
minDepth = hit;
}
Octant nodeHit = leaves[hit];
nodeHit.visible = true;
visibleLeaves++;
}
if (minDepth != -1) {
Octant closestOctant = leaves[minDepth];
Vec3f pos =
new Vec3f(closestOctant.getPosX(), closestOctant.getPosY(), closestOctant.getPosZ());
limits.setClosestPoint(pos);
}
}
}
public void updateVisibleOctant(GL gl) {
// Limits
refreshLimits();
// Switch to OpenGL select mode
int capacity = 1 * 4 * leaves.getCount(); // Each object take in maximium : 4 * name stack depth
IntBuffer hitsBuffer = BufferUtil.newIntBuffer(capacity);
gl.glSelectBuffer(hitsBuffer.capacity(), hitsBuffer);
gl.glRenderMode(GL.GL_SELECT);
gl.glInitNames();
gl.glPushName(0);
gl.glDisable(GL.GL_CULL_FACE); // Disable flags
// Draw the nodes cube in the select buffer
for (Octant n : leaves) {
n
.resetUpdatePositionFlag(); // Profit from the loop to do this, because this method is
// always after updating position
gl.glLoadName(n.getNumber());
n.displayOctant(gl);
}
int nbRecords = gl.glRenderMode(GL.GL_RENDER);
if (vizController.getVizModel().isCulling()) {
gl.glEnable(GL.GL_CULL_FACE);
gl.glCullFace(GL.GL_BACK);
}
visibleLeaves.clear();
// Get the hits and add the nodes' objects to the array
int depth = Integer.MAX_VALUE;
int minDepth = -1;
for (int i = 0; i < nbRecords; i++) {
int hit = hitsBuffer.get(i * 4 + 3); // -1 Because of the glPushName(0)
int minZ = hitsBuffer.get(i * 4 + 1);
if (minZ < depth) {
depth = minZ;
minDepth = hit;
}
Octant nodeHit = leaves.getItem(hit);
visibleLeaves.add(nodeHit);
}
if (minDepth != -1) {
Octant closestOctant = leaves.getItem(minDepth);
Vec3f pos =
new Vec3f(closestOctant.getPosX(), closestOctant.getPosY(), closestOctant.getPosZ());
limits.setClosestPoint(pos);
}
// System.out.println(minDepth);
}
public void displayOctree(GL gl, GLU glu) {
gl.glDisable(GL.GL_CULL_FACE);
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE);
for (Octant o : visibleLeaves) {
gl.glColor3f(1, 0.5f, 0.5f);
o.displayOctant(gl);
o.displayOctantInfo(gl, glu);
}
if (!vizController.getVizConfig().isWireFrame()) {
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
}
if (vizController.getVizModel().isCulling()) {
gl.glEnable(GL.GL_CULL_FACE);
gl.glCullFace(GL.GL_BACK);
}
}