// private void pickSquares(GL gl, int button, int state, int x, int y)
private void pickSquares(GL2 gl) {
int selectBuf[] = new int[BUFSIZE];
IntBuffer selectBuffer = IntBuffer.wrap(selectBuf);
int hits;
int viewport[] = new int[4];
// if (button != GLUT_LEFT_BUTTON || state != GLUT_DOWN) return;
gl.glGetIntegerv(GL2.GL_VIEWPORT, viewport, 0);
gl.glSelectBuffer(BUFSIZE, selectBuffer);
gl.glRenderMode(GL2.GL_SELECT);
gl.glInitNames();
gl.glPushName(0);
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPushMatrix();
gl.glLoadIdentity();
/* create 5x5 pixel picking region near cursor location */
glu.gluPickMatrix(
(double) pickPoint.x, (double) (viewport[3] - pickPoint.y), 5.0, 5.0, viewport, 0);
glu.gluOrtho2D(0.0, 3.0, 0.0, 3.0);
drawSquares(gl, GL2.GL_SELECT);
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPopMatrix();
gl.glFlush();
hits = gl.glRenderMode(GL2.GL_RENDER);
selectBuffer.get(selectBuf);
processHits(hits, selectBuf);
}
/*
* sets up selection mode, name stack, and projection matrix for picking.
* Then the objects are drawn.
*/
private void pickRects(GL2 gl) {
int[] selectBuf = new int[BUFSIZE];
IntBuffer selectBuffer = GLBuffers.newDirectIntBuffer(BUFSIZE);
int hits;
int viewport[] = new int[4];
// int x, y;
gl.glGetIntegerv(GL.GL_VIEWPORT, viewport, 0);
gl.glSelectBuffer(BUFSIZE, selectBuffer);
gl.glRenderMode(GL2.GL_SELECT);
gl.glInitNames();
gl.glPushName(-1);
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPushMatrix();
gl.glLoadIdentity();
/* create 5x5 pixel picking region near cursor location */
glu.gluPickMatrix(
(double) pickPoint.x,
(double) (viewport[3] - pickPoint.y), //
5.0,
5.0,
viewport,
0);
gl.glOrtho(0.0, 8.0, 0.0, 8.0, -0.5, 2.5);
drawRects(gl, GL2.GL_SELECT);
gl.glPopMatrix();
gl.glFlush();
hits = gl.glRenderMode(GL2.GL_RENDER);
selectBuffer.get(selectBuf);
processHits(hits, selectBuf);
}
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 updateSelectedOctant(GL2 gl, GLU glu, float[] mousePosition, float[] pickRectangle) {
if (visibleLeaves > 0) {
// Start Picking mode
int capacity = 1 * 4 * visibleLeaves; // 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.glDisable(GL2.GL_CULL_FACE); // Disable flags
gl.glInitNames();
gl.glPushName(0);
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPushMatrix();
gl.glLoadIdentity();
glu.gluPickMatrix(
mousePosition[0],
mousePosition[1],
pickRectangle[0],
pickRectangle[1],
drawable.getViewport());
gl.glMultMatrixf(drawable.getProjectionMatrix());
gl.glMatrixMode(GL2.GL_MODELVIEW);
// Draw the nodes' cube int the select buffer
List<Octant> visibleLeaves = new ArrayList<Octant>();
for (Octant n : leaves) {
if (n != null && n.visible) {
int i = visibleLeaves.size() + 1;
visibleLeaves.add(n);
gl.glLoadName(i);
n.displayOctant(gl);
}
}
// Restoring the original projection matrix
gl.glMatrixMode(GL2.GL_PROJECTION);
gl.glPopMatrix();
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glFlush();
// Returning to normal rendering mode
int nbRecords = gl.glRenderMode(GL2.GL_RENDER);
if (vizController.getVizModel().isCulling()) {
gl.glEnable(GL2.GL_CULL_FACE);
gl.glCullFace(GL2.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);
}
}
}
