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• cheapest way to draw a fullscreen quad

  - by Soubok

  I wondering if there is a faster way to draw a full-screen quad in OpenGL: NewList(); PushMatrix(); LoadIdentity(); MatrixMode(PROJECTION); PushMatrix(); LoadIdentity(); Begin(QUADS); Vertex(-1,-1,0); Vertex(1,-1,0); Vertex(1,1,0); Vertex(-1,1,0); End(); PopMatrix(); MatrixMode(MODELVIEW); PopMatrix(); EndList();

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• How to draw a rectangle in WinForm app in the correct location

  - by TooFat

  I have a WinForm app that has an image displayed in a PictureBox that has the added functionality of allowing a user to draw a rectangle on the image by clicking and dragging. The Location, Height and Width of the rectangle are saved to disk. When the image is viewed again I would like to automatically redraw that rectangle in the same position on the image. When I redraw it, however, the Height and Width are fine but the location is always off. The location is being captured in the MouseDown Event like so private void pbSample_MouseDown(object Sender, MouseEventArgs e) { if (SelectMode) { StartLocation.X = e.X; StartLocation.Y = e.Y; //later on these are saved as the location of the rectangle } } And I am redrawing it like so public void DrawSelectedArea(Rectangle rect) { Graphics g = this.PictureBox1.CreateGraphics(); Pen p = new Pen(Brushes.Black); g.DrawRectangle(p, rect); } Given the location from the MouseEventArgs captured during the MouseDown Event how can I calculate the correct location to redraw my rectangle?

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• Draw window with just borders

  - by Tonatiuh

  How can I create a application window that is showing just the borders of the window, but i don't want to show the contents of the window itself. I mean i want to see the rest of the desktop or the others windows through the entire region of my window. No using transparences. Just draw the borders. I suppose it's like detecting the messages WM_ERASEBKGND and WM_PAINT and doing nothing in these cases to force not painting in the contens, but I have tried and window is still drawing a white background. How can i get it?

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• Android draw using SurfaceView and Thread

  - by Morten Høgseth

  I am trying to draw a ball to my screen using 3 classes. I have read a little about this and I found a code snippet that works using the 3 classes on one page, Playing with graphics in Android I altered the code so that I have a ball that is moving and shifts direction when hitting the wall like the picture below (this is using the code in the link). Now I like to separate the classes into 3 different pages for not making everything so crowded, everything is set up the same way. Here are the 3 classes I have. BallActivity.java Ball.java BallThread.java package com.brick.breaker; import android.app.Activity; import android.os.Bundle; import android.view.Window; import android.view.WindowManager; public class BallActivity extends Activity { private Ball ball; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); ball = new Ball(this); setContentView(ball); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); setContentView(null); ball = null; finish(); } } package com.brick.breaker; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.view.SurfaceHolder; import android.view.SurfaceView; public class Ball extends SurfaceView implements SurfaceHolder.Callback { private BallThread ballThread = null; private Bitmap bitmap; private float x, y; private float vx, vy; public Ball(Context context) { super(context); // TODO Auto-generated constructor stub bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ball); x = 50.0f; y = 50.0f; vx = 10.0f; vy = 10.0f; getHolder().addCallback(this); ballThread = new BallThread(getHolder(), this); } protected void onDraw(Canvas canvas) { update(canvas); canvas.drawBitmap(bitmap, x, y, null); } public void update(Canvas canvas) { checkCollisions(canvas); x += vx; y += vy; } public void checkCollisions(Canvas canvas) { if(x - vx < 0) { vx = Math.abs(vx); } else if(x + vx > canvas.getWidth() - getBitmapWidth()) { vx = -Math.abs(vx); } if(y - vy < 0) { vy = Math.abs(vy); } else if(y + vy > canvas.getHeight() - getBitmapHeight()) { vy = -Math.abs(vy); } } public int getBitmapWidth() { if(bitmap != null) { return bitmap.getWidth(); } else { return 0; } } public int getBitmapHeight() { if(bitmap != null) { return bitmap.getHeight(); } else { return 0; } } public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { // TODO Auto-generated method stub } public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub ballThread.setRunnable(true); ballThread.start(); } public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub boolean retry = true; ballThread.setRunnable(false); while(retry) { try { ballThread.join(); retry = false; } catch(InterruptedException ie) { //Try again and again and again } break; } ballThread = null; } } package com.brick.breaker; import android.graphics.Canvas; import android.view.SurfaceHolder; public class BallThread extends Thread { private SurfaceHolder sh; private Ball ball; private Canvas canvas; private boolean run = false; public BallThread(SurfaceHolder _holder,Ball _ball) { sh = _holder; ball = _ball; } public void setRunnable(boolean _run) { run = _run; } public void run() { while(run) { canvas = null; try { canvas = sh.lockCanvas(null); synchronized(sh) { ball.onDraw(canvas); } } finally { if(canvas != null) { sh.unlockCanvasAndPost(canvas); } } } } public Canvas getCanvas() { if(canvas != null) { return canvas; } else { return null; } } } Here is a picture that shows the outcome of these classes. I've tried to figure this out but since I am pretty new to Android development I thought I could ask for help. Does any one know what is causing the ball to be draw like that? The code is pretty much the same as the one in the link and I have tried to experiment to find a solution but no luck. Thx in advance for any help=)

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• iOS4.2: TouchBegan does not draw more then one circle per sensed touch

  - by Christian

  Hi all, quick question (which might be a no-brainer for most here) :) My code below should draw a circle for every time touch that is recognised but although more than ones touches are sensed only one circle will drawn up at a time. Can anyone see any obvious issues? This method sits in the XYZViewControler.m class. TouchPoint.m is the class that defines the circle. Thanks a bundle for your help and redirects. Chris - (void) touchesBegan: (NSSet *) touches withEvent: (UIEvent *)event { NSSet * allTouches = [event allTouches]; // get all events for (UITouch * touch in touches) { TouchPoint * touchPoint = [[TouchPoint alloc] initWithFrame:CGRectMake(0, 0, circleWidth, circleWidth)]; touchPoint.center = [touch locationInView:[self view]]; touchPoint.color = [UIColor redColor]; touchPoint.backgroundColor = [UIColor whiteColor]; [[self view] addSubview: touchPoint]; [touchPoint release]; CFDictionarySetValue(touchMap, touch , touchPoint); } [[self view] setNeedsDisplay]; }

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• How to draw a sliced image in Cairo?

  - by Maz

  I am currently using the following code to draw sliced images: static void DrawImage(cairo_t *ctx,int x,int y,int w,int h,cairo_surface_t *img){ cairo_set_source_surface(ctx, img, 0, 0); cairo_rectangle(ctx, x, y, w, h); cairo_clip(ctx); cairo_paint(ctx); cairo_reset_clip(ctx); } void DrawThreeSliceImage(cairo_t* ctx,Point p,int width,cairo_surface_t *a,cairo_surface_t *b,cairo_surface_t *c){ DrawImage(ctx, p.x, p.y, cairo_image_surface_get_width(a), cairo_image_surface_get_height(a),a); DrawImage(ctx, p.x+cairo_image_surface_get_width(a), p.y, width-(cairo_image_surface_get_width(a)+cairo_image_surface_get_width(c)), cairo_image_surface_get_height(b),b); DrawImage(ctx, p.x+(width-cairo_image_surface_get_width(c)), p.y, cairo_image_surface_get_width(c), cairo_image_surface_get_height(c),c); } However, there is no output. I have tried rendering to both xlib and png surfaces, neither seems to work, that is nothing is drawn. Also, I have written the input surfaces to png files, and they appear to be working. Thanks.

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• Draw a Image on FullScreen mode Android

  - by Marcos Vasconcelos

  Hi, I already know how to get my Activity as fullscreen on Android, now I need to draw a Image in this screen. This is my XML layout. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ImageView android:id="@+id/image01" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout> This image is dynamic generated and drawed in the ImageView. This is my code on my Activity. public void onCreate(Bundle savedInstance) { super.onCreate(savedInstance); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); } But when running, the Activity is FullScreen, but the ImageView is adjusted in the center. What's wrong?

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• Can't draw to a pictureBox in a loop

  - by Jason94

  I have a List<Point> where Point contains X and Y. What i want is to loop a list like that and draw a line point to point, i do so by: foreach (List<Point> wps in map.waypoints) { System.Drawing.Pen myPen; myPen = new System.Drawing.Pen(System.Drawing.Color.Black); System.Drawing.Graphics formGraphics = this.pictureBox1.CreateGraphics(); Point startPos = new Point(wps[0].X, wps[0].Y); foreach (Point p in wps) { formGraphics.DrawLine(myPen, startPos.X, startPos.Y, p.X, p.Y); startPos = p; } myPen.Dispose(); formGraphics.Dispose(); } BUT nothing gets drawn! I did the same with the on_click event to the pictureBox but instead if a looping some Points ive just used mouse X and Y. I have verified the lists of points that they dont contain rubish :D

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• Issue when I'm trying to draw gradient in swift

  - by bagusflyer

  I got an error when I was trying to draw gradient in Swift code: GradientView.swift:31:40: Could not find an overload for '__conversion' that accepts the supplied arguments Here is my code: let context : CGContextRef = UIGraphicsGetCurrentContext() let locations :CGFloat[] = [ 0.0, 0.25, 0.5, 0.75 ] let colors = [UIColor.redColor().CGColor,UIColor.greenColor().CGColor,UIColor.blueColor().CGColor, UIColor.yellowColor().CGColor] let colorspace : CGColorSpaceRef = CGColorSpaceCreateDeviceRGB() let gradient : CGGradientRef = CGGradientCreateWithColors(colorspace, colors, locations) //CGGradientCreateWithColors(colorspace,colors,locations) let startPoint : CGPoint = CGPointMake(0, 0) let endPoint : CGPoint = CGPointMake(500,500) CGContextDrawLinearGradient(context, gradient,startPoint, endPoint, 0); The problem is the CGGradientCreateWithColors takes CFArray not a normal Swift Array. I have no idea how to convert CFArray to Array and can't find anything in Apple's document. Any idea? Thanks

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• Draw rectangle using Core Graphics with live preview

  - by mikawber

  I'm creating a simple drawing application and would like some help with drawing rectangles based on the user's touch events. I'm able to draw a rectangle using Core Graphics from the point in touchesBegan to the point in touchesEnded. This rectangle is then displayed once the touchesEnded event is fired. However, I would like to be able to do this in a 'live' fashion. Meaning, the rectangle is updated as the user drags their finger. Is this possible? Any help would be greatly appreciated, thank you!

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• Is there a faster way to draw text?

  - by mystify

  Shark complains about a big performance hit with this line, which takes like 80% of CPU time. I have a counter that is updated very frequently and performance seriously sucks. It's an custom UILabel subclass with -drawRect: implemented. Every time the counter value changes, this is used to draw the new text: [self.text drawInRect:textRect withFont:correctedFont lineBreakMode:self.lineBreakMode alignment:self.textAlignment]; When I comment this line out, performance rocks. Its smooth and fast. So Shark isn't wrong about this. But what could I do to improve this? Maybe go a level deeper? Does that make any sense? Probably drawing text is really so incredible heavy...?

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• how to draw a Bitmap to a Canvas with a variable alpha

  - by steelbytes

  Hi, I'm trying to draw a Bitmap to a Canvas with a variable amount of alpha. But I only get nothing (when alpha<255) or the 'full' bitmap (when alpha==255). Have also tried loading as a Drawable, and using drawable.setAlpha, but that gave the same result. my init BitmapFactory.Options opts = new BitmapFactory.Options(); opts.inScaled = false; opts.inSampleSize = 1; Bitmap img = BitmapFactory.decodeResource(getResources(),R.drawable.sample,opts); my onDraw() Paint p = new Paint(Paint.ANTI_ALIAS_FLAG|Paint.FILTER_BITMAP_FLAG); p.setColor((alpha<<24)+0xffffff); // alpha in range 0..255 canvas.drawBitmap(img, null, imgRect, p);

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• XNA AdGameComponent does not draw

  - by Alex Shkor

  I have following code. But AddGameComponent doesn't draw. protected override void Initialize() { // TODO: Add your initialization logic here base.Initialize(); var li = new LicenseInformation(); IsTrial = li.IsTrial(); if (IsTrial) { AdGameComponent.Initialize(this, AppID); Components.Add(AdGameComponent.Current); CreateAd(); } } private void CreateAd() { bannerAd = AdGameComponent.Current.CreateAd(AdUnitID, new Rectangle(x, y, width, height), true); AdGameComponent.Current.Enabled = true; } I have tried to set DrawOrder to 1000, but ads still doesn't work.

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• WPF draw Border on MouseOver

  - by tcables

  Hello, I have a WPF Application where I am trying to make a close button like image. I am trying to draw a border or have a border show up on mouse over... But I cannot seem to make it work. I have tried like 6 different methods of doing so...Images, borders with images, brushes, ect. I am using the following code at the moment: <Canvas Name="cMin" Height="16" Width="16" Grid.Column="1" Grid.Row="1"> <Canvas.Background> <ImageBrush ImageSource="_.png" Stretch="None" /> </Canvas.Background> <Border BorderBrush="Transparent" BorderThickness="1" Background="Transparent" CornerRadius="0" Height="18" Width="18"> <Border.Style> <Style TargetType="Border"> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="BorderBrush" Value="LightBlue" /> </Trigger> <Trigger Property="IsMouseOver" Value="False"> <Setter Property="BorderBrush" Value="Transparent" /> </Trigger> </Style.Triggers> </Style> </Border.Style> </Border> </Canvas> Any help would be appreciated, Thanks!

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• "Does not make sense to draw an image" - Warning after upgrade to MountainLion

  - by Tom

  After I upgraded my programming machine to MountainLion and XCode to the new version I get this warning printed into the console everytime I run my application: It does not make sense to draw an image when [NSGraphicsContext currentContext] is nil. This is a programming error. Break on void _NSWarnForDrawingImageWithNoCurrentContext() to debug. This will be logged only once. This may break in the future. I'm not using an Image anywhere in my Application and I searched the whole project for an image but couldn't find one. Does anybody know what could cause this? I'm using 2 nib files btw: One Popover and the Mainwindow. Neither of them contains an image. Edit: I found the line when this appears: [self.popover showRelativeToRect:[appDelegate.menulet frame] ofView:appDelegate.menulet preferredEdge:NSMinYEdge]; But none of those object is nil. Any suggestions? Edit 2: The Menulet is a NSView subclass btw. So I'm passing a view.

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• Trying to draw a Rectangle to a Custom Container in Flex4/AS3

  - by Parris

  So below is the code I have so far. For now I simply want to make it draw a square and have it show up. Right now when I click the area defined in MXML as <components:PaintArea width="100%" height="100%" id="paint-a"></PaintArea> it shows nothing; however, the actionlistener is getting triggered and an element is being added to the group. Not sure exactly what is going on... perhaps for some reason it doesn't think the element is drawable? Anyways thanks for the help! public class PaintArea extends SkinnableContainer { private var canvas:Group; public function PaintArea() { super(); canvas = new Group(); canvas.clipAndEnableScrolling = true; canvas.percentHeight = 100; canvas.percentWidth = 100; canvas.addEventListener(MouseEvent.MOUSE_UP,drawRectangle); this.addElement(canvas); } private function drawRectangle(e:MouseEvent):void{ var r:Rect = new Rect(); r.fill = new SolidColor(0x00ff00,.5); canvas.addElement(r); } }

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• Draw Bitmap with alpha channel

  - by Paja

  I have a Format32bppArgb backbuffer, where I draw some lines: var g = Graphics.FromImage(bitmap); g.Clear(Color.FromArgb(0)); var rnd = new Random(); for (int i = 0; i < 5000; i++) { int x1 = rnd.Next(ClientRectangle.Left, ClientRectangle.Right); int y1 = rnd.Next(ClientRectangle.Top, ClientRectangle.Bottom); int x2 = rnd.Next(ClientRectangle.Left, ClientRectangle.Right); int y2 = rnd.Next(ClientRectangle.Top, ClientRectangle.Bottom); Color color = Color.FromArgb(rnd.Next(0, 255), rnd.Next(0, 255), rnd.Next(0, 255)); g.DrawLine(new Pen(color), x1, y1, x2, y2); } Now I want to copy bitmap in Paint event. I do it like this: void Form1Paint(object sender, PaintEventArgs e) { e.Graphics.DrawImageUnscaled(bitmap, 0, 0); } Hovewer, the DrawImageUnscaled copies pixels and applies the alpha channel, thus pixels with alpha == 0 won't have any effect. But I need raw byte copy, so pixels with alpha == 0 are also copied. So the result of these operations should be that e.Graphics contains exact byte-copy of the bitmap. How to do that? Summary: When drawing a bitmap, I don't want to apply the alpha channel, I merely want to copy the pixels.

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• CreateProcessAsUser doesn't draw the GUI

  - by pavel.tuzov

  Hi, I have a windows service running under "SYSTEM" account that checks if a specific application is running for each logged in user. If the application is not running, the service starts it (under corresponding user name). I'm trying to accomplish my goal using CreateProcessAsUser(). The service does start the application under corresponding user name, but the GUI is not drawn. (Yes, I'm making sure that "Allow service to interact with desktop" check box is enabled). System: XP SP3, labguage: C# Here is some code that might be of interest: PROCESS_INFORMATION processInfo = new PROCESS_INFORMATION(); startInfo.cb = Marshal.SizeOf(startInfo); startInfo.lpDesktop = "winsta0\\default"; bResult = Win32.CreateProcessAsUser(hToken, null, strCommand, IntPtr.Zero, IntPtr.Zero, false, 0, IntPtr.Zero, null, ref startInfo, out processInfo); As far as I understand, setting startInfo.lpDesktop = "winsta0\default"; should have used the desktop of corresponding user. Even contrary to what is stated here: http://support.microsoft.com/kb/165194, I tried setting lpDesktop to null, or not setting it at all, both giving the same result: process was started in the name of expected user and I could see a part of window's title bar. The "invisible" window intercepts mouse click events, handles them as expected. It just doesn't draw itself. Is anyone familiar with such a problem and knows what am I doing wrong?

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• Draw to offscreen renderbuffer in OpenGL ES (iPhone)

  - by David Ensminger

  I'm trying to create an offscreen render buffer in OpenGL ES on the iPhone. I've created the buffer like this: glGenFramebuffersOES(1, &offscreenFramebuffer); glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); glGenRenderbuffersOES(1, &offscreenRenderbuffer); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, offscreenRenderbuffer); But I'm confused on how to render the storage. Apple's documentation says to use the EAGLContext renderBufferStorage:fromDrawable: method, but this seems to only work for one render buffer (the main one being displayed). If I use the normal OpenGL function glRenderBufferStorageOES, then I can't seem to get it to display. Here's the code: // this is in the initialization section: glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGB8_OES, backingWidth, backingHeight); // and this is when I'm trying to draw to it and display it: glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); GLfloat vc[] = { 0.0f, 0.0f, 0.0f, 10.0f, 10.0f, 10.0f, 0.0f, 0.0f, 0.0f, -10.0f, -10.0f, -10.0f, }; glLoadIdentity(); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3, GL_FLOAT, 0, vc); glDrawArrays(GL_LINES, 0, 4); glDisableClientState(GL_VERTEX_ARRAY); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; Doing it this way, nothing is displayed on the screen. However, if I switch out the references to "offscreen...Buffer" to the buffers that were created with the renderBufferStorage method, it works fine. Any suggestions?

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• Draw on screen border in Commodore 64

  - by Stefano Borini

  Ok. I hope it does not get closed because I have this curiosity since 25 years and I would love to understand the trick. In the commodore 64 the border was not addressable by the 6569 VIC. All you could do was to draw pixels in the central area, the one where the cursor moved. The border was always uniform, although you could change its color with poke 53280,color if i remember correctly. Nevertheless I clearly remember games intros where the border was featured with graphics, like it was fully addressable. I tried to understand how it worked but never got to the point. legends say it was a clever use of sprites, which could, under some circumstances, be drawn on the border, but I don't know if it's an urban legend. edit: just read this from one of the provided links Sprites were multiplexed across vertical raster lines (over 8 sprites, sometimes up to 120 sprites). Until the Group Crest released Krestage 3 in May 2007 there was the common perception that no more than 8 sprites could appear at one raster line, but assigning new Y coordinates made it reappear further down the screen. This is evil.... you beat the raster and reposition the sprite before it gets there...

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• ACL actions tag cause 'roles resource tree' draw incorrectly in admin/system/permissions/roles

  - by latvian

  Hi, We created new action similar to 'hold', 'ship' and others in the 'sales_order/view' admin section that can be triggered by clicking at the button. Afterward, we added our new action to the ACL with the following code in config.xml: <acl> <resources> <admin> <children> <sales> <children> <order> <children> <actions translate="title"> <title>Actions</title> <children> <shipNew translate="title"><title>Ship Ups</title></shipNew> </children> </actions> </children> <sort_order>10</sort_order> </order> </children> </sales> </children> </admin> </resources> </acl> ACL functionality works, however, in the 'Resources Tree'(System/Permissions/Roles/Role Resources) our new action does never show up as selected(checked) even thou it is allowed for particular Role. I can see that from table 'admin_rule' with resource id for our new action that it is allowed, so it needs to be selected, but it is not. When trying to solve this issue i looked into the template(permissions/rolesedit.phtml) and I found that the 'resource tree' is draw with Javascript...thats where i got stock due to my limited knowledge in Javascript. Why the resource tree does not display our new ACL entry correctly, that is the check box is never checked? Thank You for helping margots

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• Draw Rectangle with XNA

  - by mazzzzz

  Hey guys, I was working on game, and wanted to highlight a spot on the screen when something happens, I created a class to do this for me, and found a bit of code to draw the rectangle static private Texture2D CreateRectangle(int width, int height, Color colori) { Texture2D rectangleTexture = new Texture2D(game.GraphicsDevice, width, height, 1, TextureUsage.None, SurfaceFormat.Color);// create the rectangle texture, ,but it will have no color! lets fix that Color[] color = new Color[width * height];//set the color to the amount of pixels in the textures for (int i = 0; i < color.Length; i++)//loop through all the colors setting them to whatever values we want { color[i] = colori; } rectangleTexture.SetData(color);//set the color data on the texture return rectangleTexture;//return the texture } Problem is that the code above is called every update, (60 times a second), and it was not written with optimization in mind, I have no clue how else to write a code to do this though. It needs to be extremely fast (the code above freezes the game, which has only skeleton code right now).. Any suggestions. Note: Any new code would be great (WireFrame/Fill are both fine). I would like to be able to specify color. Something to point in the right direction would be great, Thanks, Max

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• Opengl-es draw an .obj file, but how?

  - by lacas

  I d like to parse an .obj file. My parser is working good, but my displaying is not good. Obj file is here my code is: public ObjModelParser parse() { long startTime = System.currentTimeMillis(); InputStream fileIn = resources.openRawResource(resourceID); BufferedReader buffer = new BufferedReader(new InputStreamReader(fileIn)); String line=""; Log.e("model loader", "Start parsing object " + resourceID); try { while ((line = buffer.readLine()) != null) { StringTokenizer parts = new StringTokenizer(line, " "); int numTokens = parts.countTokens(); if (numTokens == 0) continue; String part = parts.nextToken(); if (part.equals(VERTEX)) { Log.e("v ", line); vertices.add(Float.parseFloat(parts.nextToken())); vertices.add(Float.parseFloat(parts.nextToken())); vertices.add(Float.parseFloat(parts.nextToken())); .... and my displaying code is: draw that model with TRIANGLE_STRIP and gl.glDrawArrays(rendermode, 0, coords.length/dimension); What is the mistake here? edited: file here to show what is my good coords from my program for a cube, and what is from .obj file, that never show Thanks, Leslie

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• Draw an Inset NSShadow and Inset Stroke

  - by Alexsander Akers

  I have an NSBezierPath and I want to draw in inset shadow (similar to Photoshop) inside the path. Is there anyway to do this? Also, I know you can -stroke paths, but can you stroke inside a path (similar to Stroke Inside in Photoshop)? Update This is the code I'm using. The first part makes a white shadow downwards. The second part draws the gray gradient. The third part draws the black inset shadow. Assume path is an NSBezierPath instance and that clr(...) returns an NSColor from a hex string. NSShadow * shadow = [NSShadow new]; [shadow setShadowColor: [NSColor colorWithDeviceWhite: 1.0f alpha: 0.5f]]; [shadow setShadowBlurRadius: 0.0f]; [shadow setShadowOffset: NSMakeSize(0, 1)]; [shadow set]; [shadow release]; NSGradient * gradient = [[NSGradient alloc] initWithColorsAndLocations: clr(@"#262729"), 0.0f, clr(@"#37383a"), 0.43f, clr(@"#37383a"), 1.0f, nil]; [gradient drawInBezierPath: path angle: 90.0f]; [gradient release]; [NSGraphicsContext saveGraphicsState]; [path setClip]; shadow = [NSShadow new]; [shadow setShadowColor: [NSColor redColor]]; [shadow setShadowBlurRadius: 0.0f]; [shadow setShadowOffset: NSMakeSize(0, -1)]; [shadow set]; [shadow release]; [path stroke]; [NSGraphicsContext restoreGraphicsState]; Here you can see a gradient fill, a white drop shadow downwards, and a black inner shadow downwards.

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• Draw multiple circles in Google Maps

  - by snorpey

  Hi. I want to draw multiple circles on a map, using the Google Maps API anj jQuery. The following code works as long as the line with drawMapCircle() is commented out (The markers are positioned correctly). What's wrong with my code? $.getJSON( "ajax/show.php", function(data) { $.each(data.points, function(i, point) { map.addOverlay(new GMarker(new GLatLng(point.lat, point.lng))); drawMapCircle(point.lat, point.lng, 0.01, '#0066ff', 2, 0.8, '#0cf', 0.1); }); } ); function drawMapCircle(lat, lng, radius, strokeColor, strokeWidth, strokeOpacity, fillColor, fillOpacity) { var d2r = Math.PI / 180; var r2d = 180 / Math.PI; var Clat = radius * 0.014483; // statute miles into degrees latitude conversion var Clng = Clat/Math.cos(lat * d2r); var Cpoints = []; for (var i = 0; i < 33; i++) { var theta = Math.PI * (i / 16); Cy = lat + (Clat * Math.sin(theta)); Cx = lng + (Clng * Math.cos(theta)); var P = new GLatLng(Cy, Cx); Cpoints.push(P); } var polygon = new GPolygon(Cpoints, strokeColor, strokeWidth, strokeOpacity, fillColor, fillOpacity); map.addOverlay(polygon); }

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