public void addTick(Cam c) {
tickArr.add(new Tick(hs1.getSliderPos(), hsYPos, c, hs1.getPosInSeconds()));
// set the older ticks to inactive
for (int i = 0; i < tickArr.size() - 1; i++) {
tickArr.get(i).setToInActive();
}
// sort the ticks in case one was placed before an existing tick
Collections.sort(tickArr);
}
/** A little utility class for mapping the pixel coordinates of touches to zones. */
public class ZonePicker {
// constants
private static final int BACKGROUND_COLOR = 0;
private static final int START_COLOR = 0x000000;
private static final int MAX_COLOR = 0xffffff;
private static final int POSSIBLE_COLORS = (MAX_COLOR - START_COLOR) + 1;
// private fields
private ByteBuffer buffer;
private int currentColor;
private Map<Integer, Zone> zoneMap =
Collections.synchronizedMap(new LinkedHashMap<Integer, Zone>());
private P3DDSRenderer renderer;
// public fields
// A reference to the graphics context used for picking
public PGraphics3D picking_context;
/** Create a new zone picker. SMT.init() must have been called first. */
public ZonePicker() {
renderer = SMT.getRenderer();
this.picking_context =
(PGraphics3D)
SMT.getApplet().createGraphics(renderer.width, renderer.height, PConstants.P3D);
int SIZEOF_INT = Integer.SIZE / 8;
buffer = ByteBuffer.allocateDirect(SIZEOF_INT);
currentColor = START_COLOR;
}
/**
* Add a zone to the zone picker.
*
* @param zone the zone to enable picking on.
*/
public void add(Zone zone) {
// check if we already have this zone
if (zoneMap.containsValue(zone)) return;
if (zoneMap.size() == POSSIBLE_COLORS) {
// We've run out of pick colours :( oh no
System.err.printf(
"The number of zones has exceeded the maximum number of pickable zones (%d). This recently added zone (%s) will not be pickable.",
POSSIBLE_COLORS, zone);
return;
}
// get a new colour
zone.setPickColor(new Color(currentColor, false));
int pixelColor = 0xff + (currentColor << 8);
zoneMap.put(pixelColor, zone);
// dont bother searching if we're out of colours anyways
if (zoneMap.size() < POSSIBLE_COLORS) {
while (zoneMap.containsKey(pixelColor)) {
currentColor += 1;
pixelColor = 0xff + (currentColor << 8);
}
}
// add all of the zone's child zones
for (Zone child : zone.getChildren()) this.add(child);
}
/**
* Check whether this zone picker has already registered a zone
*
* @param zone a zone
* @return whether the specified zone has already been added to the zone picker
*/
public boolean contains(Zone zone) {
return zoneMap.containsValue(zone);
}
/**
* Remove the specified zone from the zone picker
*
* @param zone the zone to remove
* @return The zone that was removed
*/
public Zone remove(Zone zone) {
Color color = zone.getPickColor();
int pixelColor = color.getAlpha() + (color.getRGB() << 8);
Zone removed = zoneMap.remove(pixelColor);
zone.setPickColor(null);
return removed;
}
/**
* Get the Zone under the specified coordinates.
*
* @param x x coordinate of the specified pixel
* @param y y coordinate of the specified pixel
* @return If there is a Zone at the specified coordinates, that zone, otherwise null.
*/
public Zone pick(int x, int y) {
// clamp x and y
if (y >= picking_context.height) y = picking_context.height - 1;
if (x >= picking_context.width) x = picking_context.width - 1;
if (y < 0) y = 0;
if (x < 0) x = 0;
PGL pgl = picking_context.beginPGL();
int pixel;
// force fallback until 2.0b10
if (!SMT.fastPickingEnabled() || pgl == null) {
// really slow way(max 70 fps on a high end card vs 200+ fps with readPixels), with loadPixels
// at the end of render()
pixel = picking_context.pixels[x + y * picking_context.width];
} else {
buffer.clear();
pgl.readPixels(x, picking_context.height - y, 1, 1, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, buffer);
pixel = buffer.getInt();
}
picking_context.endPGL();
if (zoneMap.containsKey(pixel)) {
// if mapped it is either a Zone or null (background)
Zone picked = zoneMap.get(pixel);
Zone current = picked;
while (current != null) {
if (current.stealChildrensTouch) return current;
current = current.getParent();
}
return picked;
} else return null;
}
/** Prepare the picking graphics context for picking */
public void render() {
// set up for rendering the pick buffer
renderer.pushDelegate(picking_context);
renderer.beginDraw();
renderer.clear();
renderer.ortho();
// render the pick buffer
SMT.getRootZone().invokePickDraw();
renderer.endDraw();
renderer.flush();
// If fast picking disabled, use loadPixels() which is really slow (max 70 fps on a high end
// card vs 200+ fps with readPixels) as a backup.
PGL pgl = renderer.beginPGL();
if (!SMT.fastPickingEnabled() || pgl == null) renderer.loadPixels();
renderer.endPGL();
renderer.popDelegate();
}
}
