I have a game which displays objects properly on two devices (nexus 4 & 7), and in the emulator, but it shows white for some objects on a third device (samsung sgh-t679m).
Notice that on the "old" samsung, the background image and road image are rendered properly in colour, but the houses, planes, etc are white. I couldn't find a similar problem. Other issues report white objects consistently over all devices. Otherwise, the game action is working. The samsung has android 2.3.5
The main part of code is below:
public void render(World world, float deltaTime) {
GL10 gl = glGraphics.getGL();
if (world.bob.runningState == Bob.BOB_FALLING) {
camera.getPosition().set(0, 2f, GameScreen.cameraZ + 2);
camera.getLookAt().set(0, 0, GameScreen.cameraZ - 4);
}
else {
camera.getPosition().set(0, 5f, GameScreen.cameraZ + 2);
camera.getLookAt().set(0, 0, GameScreen.cameraZ - 4);
}
camera.setMatrices(gl);
gl.glEnable(GL10.GL_DEPTH_TEST);
gl.glEnable(GL10.GL_TEXTURE_2D);
gl.glEnable(GL10.GL_LIGHTING);
gl.glEnable(GL10.GL_COLOR_MATERIAL);
ambientLight.enable(gl);
directionalLight.enable(gl, GL10.GL_LIGHT0);
renderBackgroundImages(gl, world.backgroundimages, deltaTime);
renderRoads(gl, world.roads, deltaTime);
renderCoins(gl, world.coins, deltaTime);
renderObstacles(gl, world.obstacles, deltaTime);
renderOverheads(gl, world.overheads, deltaTime);
renderHouses(gl, world.houses, deltaTime);
renderBob(gl, world.bob, deltaTime);
renderInvaders(gl, world.invaders, deltaTime);
renderShots(gl, world.shots, deltaTime);
gl.glDisable(GL10.GL_TEXTURE_2D);
gl.glDisable(GL10.GL_COLOR_MATERIAL);
gl.glDisable(GL10.GL_LIGHTING);
gl.glDisable(GL10.GL_DEPTH_TEST);
}
Related
ARKIT issue.
On upgrading the iPhone ios from 15.6 to ios 16, i am facing issue in loading virtual object contents on the screen.
Below mentioned code is working fine with iPhone iOS version 15.6.
In ios 16, below function is keep on calling in the code.
Tag: ProcessRaycastResults
private func setVirtualObject3DPosition(_ results: [ARRaycastResult], with virtualObject: VirtualObject) {
guard let result =
results.first else {
print("Unexpected case: the update handler is always supposed to return at least one result.")
return;
}
self.setTransform(of: virtualObject, with: result)
// If the virtual object is not yet in the scene, add it.
if virtualObject.parent == nil {
self.childNodesPortal = virtualObject.childNodes
self.getMatrials(scene: virtualObject.childNodes)
}
}
func getMatrials(scene:[SCNNode]){
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5 ) {
for child in scene {
material.diffuse.contents = "https//xyz.png"
material.normal.contents = "https//xss.png"
//setting here materials with the png images from url.
}
}
}
Anyone could suggest why there is variation for iOS version 16 device and what workaround I should do.
I need make an App that has about 30k Objects, a user can Pan, Zoom or "Select on click" any of those objects.
Fabric.js Canvas is being used
I have done the same using SVG's and the svg-pan-zoom plugin (no Canvas Element) with better results
Problem: there is a significant Lag while Zooming, Panning or Object on Click
will removing Fabric.js improve performance?
will switching to WebGL improve performance?
Have tried Fabric specific options
fabric.Object.prototype.objectCaching = false;
fabric.Object.prototype.statefullCache = false;
fabric.Object.prototype.noScaleCache = true;
fabric.Object.prototype.needsItsOwnCache = false;
UPDATE
Heres the updated Fiddle
for reference :
canvas-vs-svg-vs-div Stackoverflow
Stackoverflow
Don't Render in IO EVENTS!
Though not a complete fix to the update speed this answer will about double the interaction speed.
A common, almost standard, mistake made with mouse and event interaction with the canvas (and DOM) is to delegate rendering to mouse/touch events. This is very bad practice as mouse events fire at much higher rates than the display can display. It becomes worse when your rendering time is high as you queue up mouse events (pseudo render events) and do a re render for every movement of the mouse
Note blocking code will stop mouse events but as soon as the engine is idle the mouse will start firing at full rate again.
Use the mouse events just to get the mouse state. Use an animation loop that is synced to the display to render only when needed and there is time available. Things like the wheel and mouse movement deltas should be recorded cumulatively.
mouse.dx += event.movementX;
mouse.dy += event.movementY;
mouse.wheel += event.wheelDelta;
And consume them in the main render loop...
function update(){
// ... code to use mouse
// consume deltas
mouse.x = mouse.y = mouse.wheel = 0;
...this ensures that the mouse state is accurately followed when you may have many mouse events between render updates.
Example, separating events from rendering.
Change you code in the fiddle you provided to the following, on my machine it about doubled the rendering speed (which is still very slow).
// from just after the function applyZoom replace all the code
var mouse = { // holds the mouse state
x : 0,
y : 0,
down : false,
w : 0,
delta : new fabric.Point(0,0),
}
// event just track mouse state
function zoom(e) {
if(e != null) { e.preventDefault() }
var evt=window.event || e;
mouse.x = e.offsetX;
mouse.y = e.offsetY;
mouse.w += evt.detail? evt.detail*(-120) : evt.wheelDelta;
return false;
}
canvas.on('mouse:up', function (e) { mouse.down = false });
canvas.on('mouse:out', function (e) { mouse.down = false });
canvas.on('mouse:down', function (e) { mouse.down = true });
canvas.on('mouse:move', function(e) {
if (e && e.e) {
mouse.delta.x += e.e.movementX;
mouse.delta.y += e.e.movementY;
}
});
// main animation loop
function update(){
if(mouse.w !== 0){ // if the wheel has moved do zoom
var curZoom = canvas.getZoom();
canvas.zoomToPoint(
{ x : mouse.x, y: mouse.y },
canvas.getZoom() + mouse.w / 4000
);
mouse.w = 0; // consume wheel delta
}else if(mouse.down) { // if mouse button down
canvas.relativePan(mouse.delta);
}
// consume mouse delta
mouse.delta.x = 0;
mouse.delta.y = 0;
requestAnimationFrame(update);
}
requestAnimationFrame(update);
I'm at a loss with this — I have several personal projects in mind that essentially require that I "tap" into the audio stream: read the audio data, do some processing and modify the audio data before it is finally sent to the audio device.
One example of these personal projects is a software-based active crossover. If I have an audio device with 6 channels (i.e., 3 left + 3 right), then I can read the data, apply a LP filter (×2 – left + right), a BP filter, and a HP filter and output the streams through each of the six channels.
Notice that I know how to write a player application that does this — instead, I would want to do this so that any audio from any source (audio players, video players, youtube or any other source of audio being played by the web browser, etc.) is subject to this processing.
I've seen some of the examples (e.g., pcm_min.c from the alsa-project web site, play and record examples in the Linux Journal article by Jeff Tranter from Sep 2004) but I don't seem to have enough information to do something like what I describe above.
Any help or pointers will be appreciated.
You can implement your project as a LADSPA plugin, test it with audacity or any other program supporting LADSPA plugins, and when you like it, insert it into alsa/pulseaudio/jack playback chain.
"LADSPA" is a single header file defining a simple interface to write audio processing plugins. Each plugin has its input/output/control ports and run() function. The run() function is executed for each block of samples to do actual audio processing — apply "control" arguments to "input" buffers and write result to "output" buffers.
Example LADSPA stereo amplifier plugin (single control argument: "Amplification factor", two input ports, two output ports):
///gcc -shared -o /full/path/to/plugindir/amp_example.so amp_example.c
#include <stdlib.h>
#include "ladspa.h"
enum PORTS {
PORT_CAMP,
PORT_INPUT1,
PORT_INPUT2,
PORT_OUTPUT1,
PORT_OUTPUT2
};
typedef struct {
LADSPA_Data *c_amp;
LADSPA_Data *i_audio1;
LADSPA_Data *i_audio2;
LADSPA_Data *o_audio1;
LADSPA_Data *o_audio2;
} MyAmpData;
static LADSPA_Handle myamp_instantiate(const LADSPA_Descriptor *Descriptor, unsigned long SampleRate)
{
MyAmpData *data = (MyAmpData*)malloc(sizeof(MyAmpData));
data->c_amp = NULL;
data->i_audio1 = NULL;
data->i_audio2 = NULL;
data->o_audio1 = NULL;
data->o_audio2 = NULL;
return data;
}
static void myamp_connect_port(LADSPA_Handle Instance, unsigned long Port, LADSPA_Data *DataLocation)
{
MyAmpData *data = (MyAmpData*)Instance;
switch (Port)
{
case PORT_CAMP: data->c_amp = DataLocation; break;
case PORT_INPUT1: data->i_audio1 = DataLocation; break;
case PORT_INPUT2: data->i_audio2 = DataLocation; break;
case PORT_OUTPUT1: data->o_audio1 = DataLocation; break;
case PORT_OUTPUT2: data->o_audio2 = DataLocation; break;
}
}
static void myamp_run(LADSPA_Handle Instance, unsigned long SampleCount)
{
MyAmpData *data = (MyAmpData*)Instance;
double amp = *data->c_amp;
size_t i;
for (i = 0; i < SampleCount; i++)
{
data->o_audio1[i] = data->i_audio1[i]*amp;
data->o_audio2[i] = data->i_audio2[i]*amp;
}
}
static void myamp_cleanup(LADSPA_Handle Instance)
{
MyAmpData *data = (MyAmpData*)Instance;
free(data);
}
static LADSPA_Descriptor myampDescriptor = {
.UniqueID = 123, // for public release see http://ladspa.org/ladspa_sdk/unique_ids.html
.Label = "amp_example",
.Name = "My Amplify Plugin",
.Maker = "alsauser",
.Copyright = "WTFPL",
.PortCount = 5,
.PortDescriptors = (LADSPA_PortDescriptor[]){
LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL,
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO,
LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO,
LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO,
LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO
},
.PortNames = (const char * const[]){
"Amplification factor",
"Input left",
"Input right",
"Output left",
"Output right"
},
.PortRangeHints = (LADSPA_PortRangeHint[]){
{ /* PORT_CAMP */
LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_1,
0, /* LowerBound*/
10 /* UpperBound */
},
{0, 0, 0}, /* PORT_INPUT1 */
{0, 0, 0}, /* PORT_INPUT2 */
{0, 0, 0}, /* PORT_OUTPUT1 */
{0, 0, 0} /* PORT_OUTPUT2 */
},
.instantiate = myamp_instantiate,
//.activate = myamp_activate,
.connect_port = myamp_connect_port,
.run = myamp_run,
//.deactivate = myamp_deactivate,
.cleanup = myamp_cleanup
};
// NULL-terminated list of plugins in this library
const LADSPA_Descriptor *ladspa_descriptor(unsigned long Index)
{
if (Index == 0)
return &myampDescriptor;
else
return NULL;
}
(if you prefer "short" 40-lines version see https://pastebin.com/unCnjYfD)
Add as many input/output channels as you need, implement your code in myamp_run() function. Build the plugin and set LADSPA_PATH environment variable to the directory where you've built it, so that other apps could find it:
export LADSPA_PATH=/usr/lib/ladspa:/full/path/to/plugindir
Test it in audacity or any other program supporting LADSPA plugins. To test it in terminal you can use applyplugin tool from "ladspa-sdk" package:
applyplugin input.wav output.wav /full/path/to/plugindir/amp_example.so amp_example 2
And if you like the result insert it into your default playback chain. For plain alsa you can use a config like (won't work for pulse/jack):
# ~/.asoundrc
pcm.myamp {
type plug
slave.pcm {
type ladspa
path "/usr/lib/ladspa" # required but ignored as `filename` is set
slave.pcm "sysdefault"
playback_plugins [{
filename "/full/path/to/plugindir/amp_example.so"
label "amp_example"
input.controls [ 2.0 ] # Amplification=2
}]
}
}
# to test it: aplay -Dmyamp input.wav
# to point "default" pcm to it uncomment next line:
#pcm.!default "myamp"
See also:
ladspa.h - answers to most technical questions are there in comments
LADSPA SDK overview
listplugins and analyseplugin tools from "ladspa-sdk" package
alsa plugins : "type ladspa" syntax, and alsa configuration file syntax
ladspa plugins usage examples
If you want to get your hands dirty with some code, you could check out some of these articles by Paul Davis (Paul Davis is a Linux audio guru). You'll have to combine the playback and capture examples to get live audio. Give it a shot, and if you have problems you can post a code-specific problem on SO.
Once you get the live audio working, you can implement an LP filter and go from there.
There are plenty of LADSPA and LV2 audio plugins that implement LP, HP and BP filters but I'm not sure if any are available for your particular channel configuration. It sounds like you want to roll your own anyway.
Suppose I have a large campsite like "seating" chart with several hundred lots sectioned off and outlined in photoshop. (each lot is roughly a square) Every lot needs to be numbered in photoshop and also editable in the future in case of changes. The lots are scattered and curve around the landscape so entering text in one layer seems out since for example lot 27 with be on the right and rotate 20 degrees to match the lot and yet lot 185 might be way over on the left at a far different angle.
Is there an elegant way to do this or at least quickly import a large number sequence that places one number per layer so I can grab them and orient them to their corresponding lot quickly instead of typing out and then positioning ever number individually? I'm having trouble thinking up an elegant/fast way to handle this in Photoshop...
Edit 1 - picture: http://i.imgur.com/UT3DRBi.jpg
You can do it with Extendscript. I am not the best of Extendscript programmers, but the following script will ask you for the number of text labels you want and add that many numbers on sepearate layers. Of course, you can diddle around with the font, colour, position, size etc. but it should get you started.
Here is an example - I turned off layers 4 and 5 so you can see each number is on a new layer.
Here it asks how many numbers you want:
// Setchell - AddNumbers - Adobe Photoshop Script
// Description: Asks user for number of numbers to add, each in own layer
// Version: 0.1
// Author: Mark Setchell (mark#thesetchells.com)
// Web: http://www.thesetchells.com
// ============================================================================
// Installation:
// 1. Place script in 'C:\Program Files\Adobe\Adobe Photoshop CS#\Presets\Scripts\'
// 2. Restart Photoshop
// 3. Choose File > Scripts > AddNumbers
// ============================================================================
// enable double-clicking from Mac Finder or Windows Explorer
// this command only works in Photoshop CS2 and higher
#target photoshop
// bring application forward for double-click events
app.bringToFront();
///////////////////////////////////////////////////////////////////////////////
// AddNumbers
///////////////////////////////////////////////////////////////////////////////
function AddNumbers() {
// Change Debug=1 for extra debugging messages
var Debug=1;
// Get user to enter common stem for JPEG names
var dialog = new Window('dialog', 'Setchell - AddNumbers');
dialog.size = {width:500, height:100};
dialog.stem = dialog.add('edittext',undefined, '<Enter ending number>');
dialog.stem.size = {width:400,height:25};
dialog.stem.value = true;
dialog.stem.buildBtn = dialog.add('button', undefined,'OK', {name:'ok'});
dialog.show();
// Pick up what user entered - just digits
var limit=dialog.stem.text.match(/\d+/);
// Debug
if(Debug)alert(limit);
var cnt;
var n=0;
var nPer=10;
var deltaX=app.activeDocument.width/nPer;
var deltaY=app.activeDocument.height/nPer;
var tX=0;
var tY=deltaY;
app.preferences.typeUnits = TypeUnits.POINTS;
for(cnt=1;cnt<=limit;cnt++){
// Adds a new layer to the active document and stores it in a variable named “myTextLayer”.
var myTextLayer = app.activeDocument.artLayers.add();
// Changes myTextLayer from normal to a text layer.
myTextLayer.kind = LayerKind.TEXT;
// Gets a reference to the textItem property of myTextLayer.
var myText = myTextLayer.textItem;
// sets the font size of the text to 16.
myText.size = 16;
// Sets the contents of the textItem.
myText.contents = cnt;
// Position the label - could be improved :-)
tX=n*deltaX;
myText.position = new Array(tX, tY);
n++;
if(n==nPer){
tY+=deltaY;
n=0;
}
}
return;
}
///////////////////////////////////////////////////////////////////////////////
// isCorrectVersion - check for Adobe Photoshop CS2 (v9) or higher
///////////////////////////////////////////////////////////////////////////////
function isCorrectVersion() {
if (parseInt(version, 10) >= 9) {
return true;
}
else {
alert('This script requires Adobe Photoshop CS2 or higher.', 'Wrong Version', false);
return false;
}
}
///////////////////////////////////////////////////////////////////////////////
// showError - display error message if something goes wrong
///////////////////////////////////////////////////////////////////////////////
function showError(err) {
if (confirm('An unknown error has occurred.\n' +
'Would you like to see more information?', true, 'Unknown Error')) {
alert(err + ': on line ' + err.line, 'Script Error', true);
}
}
// test initial conditions prior to running main function
if (isCorrectVersion()) {
// Save current RulerUnits to restore when we have finished
var savedRulerUnits = app.preferences.rulerUnits;
// Set RulerUnits to PIXELS
app.preferences.rulerUnits = Units.PIXELS;
try {
AddNumbers();
}
catch(e) {
// don't report error on user cancel
if (e.number != 8007) {
showError(e);
}
}
// Restore RulerUnits to whatever they were when we started
app.preferences.rulerUnits = savedRulerUnits;
}
I'm trying to add multiple (actually 3 ) views to an SDI application and give the user choose witch View will be load according to his choice :
IMG
I have followed this tutorial in the official MS documentation .
So, have created three classes : CAdminView CAssistantView CBiblioView and an authentication class associated to a dialog frame .
My Questions are :
1) how to edit this three view classes (Graphically) ?
2) at first time I want to show just the authentication dialog window , how to do that ?
* I tried to change m_pMainWnd->ShowWindow(SW_SHOW);
by m_pMainWnd->ShowWindow(SW_HIDE); but no expected result
3) I expect to load the view according to parameter, this is what I added to the InitInstance funnction :
CView* pActiveView = ((CFrameWnd*) m_pMainWnd)->GetActiveView();
m_BiblioView = (CView*) new CBiblioView;
m_AdminView = (CView*) new CAdminView;
m_AssistantView = (CView*) new CAssistantView;
CDocument* pCurrentDoc = ((CFrameWnd*)m_pMainWnd)->GetActiveDocument();
// Initialize a CCreateContext to point to the active document.
// With this context, the new view is added to the document
// when the view is created in CView::OnCreate().
CCreateContext newContext;
newContext.m_pNewViewClass = NULL;
newContext.m_pNewDocTemplate = NULL;
newContext.m_pLastView = NULL;
newContext.m_pCurrentFrame = NULL;
newContext.m_pCurrentDoc = pCurrentDoc;
// The ID of the initial active view is AFX_IDW_PANE_FIRST.
// Incrementing this value by one for additional views works
// in the standard document/view case but the technique cannot
// be extended for the CSplitterWnd case.
UINT viewID = AFX_IDW_PANE_FIRST + 1;
CRect rect(0, 0, 0, 0); // Gets resized later.
// Create the new view. In this example, the view persists for
// the life of the application. The application automatically
// deletes the view when the application is closed.
m_AdminView->Create(NULL, "Fenetre Administrarteur", WS_CHILD, rect, m_pMainWnd, viewID, &newContext);
m_AssistantView->Create(NULL, "Fenetre Assistant", WS_CHILD, rect, m_pMainWnd, viewID, &newContext);
m_BiblioView->Create(NULL, "Fenetre Bibliothecaire ", WS_CHILD, rect, m_pMainWnd, viewID, &newContext);
// When a document template creates a view, the WM_INITIALUPDATE
// message is sent automatically. However, this code must
// explicitly send the message, as follows.
m_AdminView->SendMessage(WM_INITIALUPDATE, 0, 0);
m_AssistantView->SendMessage(WM_INITIALUPDATE, 0, 0);
m_BiblioView->SendMessage(WM_INITIALUPDATE, 0, 0);
and this is my switch function :
CView* CMiniProjetApp::SwitchView(int Code ) //1 : Admi / 2 : Biblio / 3 : Assistant
{
CView* pActiveView =((CFrameWnd*) m_pMainWnd)->GetActiveView();
CView* pNewView= NULL;
switch(Code){
case 1 : pNewView= m_AdminView; break;
case 2 : pNewView= m_BiblioView; break;
case 3 : pNewView= m_AssistantView; break;
}
// Exchange view window IDs so RecalcLayout() works.
#ifndef _WIN32
UINT temp = ::GetWindowWord(pActiveView->m_hWnd, GWW_ID);
::SetWindowWord(pActiveView->m_hWnd, GWW_ID, ::GetWindowWord(pNewView->m_hWnd, GWW_ID));
::SetWindowWord(pNewView->m_hWnd, GWW_ID, temp);
#else
UINT temp = ::GetWindowLong(pActiveView->m_hWnd, GWL_ID);
::SetWindowLong(pActiveView->m_hWnd, GWL_ID, ::GetWindowLong(pNewView->m_hWnd, GWL_ID));
::SetWindowLong(pNewView->m_hWnd, GWL_ID, temp);
#endif
pActiveView->ShowWindow(SW_HIDE);
pNewView->ShowWindow(SW_SHOW);
((CFrameWnd*) m_pMainWnd)->SetActiveView(pNewView);
((CFrameWnd*) m_pMainWnd)->RecalcLayout();
pNewView->Invalidate();
return pActiveView;
}
Any errors notices ??!!
*please help me !
Thanks .
Showing and Hiding the window is the correct way. But you Need to set the view as active too.
You find the required working codein this MSDN Sample VSSWAP32.
The required code to switch and hide the other views is shown in the article.