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  • Drawing path by Bezier curves

    - by OgreSwamp
    Hello. I have a task - draw smooth curve input: set of points (they added in realtime) current solution: I use each 4 points to draw qubic Bezier curve (1 - strart, 2 and 3rd - control points, 4- end). End point of each curve is start point for the next one. problem: at the curves connection I often have "fracture" (angle) Can you tell me, how to connect my points more smooth? Thanks!

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  • Java Graphics on java, 2d array board game.

    - by FILIaS
    I wanna fix a 2D board for a game. I've already fixed other panels for the gui and everything goes well. But the panel for the board cant be printed on the window. I'm a bit confused about it as i think i've followed the same ideas as for the others panels i need. Here's what i've done: /** *Method used to construct the square in the area of the *gui's grid. In this stage a GUISquare array is being constructed, * used in the whole game as *a mean of changing a square graphical state. *@param squares is the squares array from whom the gui grid will be *constructed. *@see getSquare about the correspondance beetween a squareModel and * a GUISquare. */ private void initBoardPanel(SquareModel[][] squares){ BoardPanel.setLayout(new GridLayout(myGame.getHeight(),myGame.getWidth())); //set layout Squares=new GUISquare[myGame.getHeight()][myGame.getWidth()]; grid=new JPanel[myGame.getHeight()][myGame.getWidth()]; for (int i=0; i< myGame.getHeight(); i++){ for (int j=0; j<myGame.getWidth() ; j++){ grid[i][j] = new JPanel( ); GUISquare kout=new GUISquare(i,j); kout.setSquare(myGame.getSquares()[i][j]); kout.draw(myGame.getSquares()[i][j].getGoTo(),myGame.getSquares()[i][j].getNumber()); /*draw method is been called. the first parameter is the number of the square that the player will be moved to if lands in this one square,the second parameter is just the number of the square */ kout.setVisible(true); grid[i][j].add(kout); grid[i][j].setVisible(true); BoardPanel.add(grid[i][j]); BoardPanel.setVisible(true); BoardPanel.setBackground(Color.WHITE); GUISquare temp=this.getSquare(squares[i][i]); Squares[i][j]= temp; } } this.add(BoardPanel,BorderLayout.WEST); // this.pack(); //sets appropriate size for frame this.setVisible(true); //makes frame visible } /** * Transformer for Rand/Move * <br>This method is used to display a square on the screen. */ public void draw(int goTo ,int number) { JPanel panel = new JPanel(); JLabel label1 = new JLabel(""+"Move To"+goTo); JLabel label2 = new JLabel(""+number); JSeparator CellSeparator = new JSeparator(orientation); panel.add(CellSeparator); panel.setLayout(new BorderLayout()); panel.add(label1, BorderLayout.CENTER); panel.add(label2, BorderLayout.LINE_START); } I've posted only one draw method...but all versions are alike.

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  • sequence diagram [UML]

    - by Upul
    Hi All, I have a question regarding sequence diagrams. When drawing sequence diagrams, Is it enough to draw one diagram per user case ? or do we need to draw a set of sequence diagrams to cover each user case instance ? (is a sequence of actions a system performs that yields an observable result of value to a particular Use Case Actor)

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  • When I run cxxtest I get this error that I dont underdstand?

    - by user299648
    ./cxxtest/cxxtestgen.py -o tests.cpp --error-printer DrawTestSuite.h g++ -I./cxxtest/ -c tests.cpp g++ -o tests tests.o Color.o tests.o: In function DrawTestSuite::testLinewidthOne()': tests.cpp:(.text._ZN13DrawTestSuite16t… undefined reference toLinewidth::Linewidth(double)' tests.cpp:(.text._ZN13DrawTestSuite16t… undefined reference to `Linewidth::draw(std::basic_ostream &)' collect2: ld returned 1 exit status make: * [tests] Error 1// DrawTestSuite.h DrawTestSuite.h contains the unit-test and The test function calls on Linewidth.h to execute the constructer and member function draw I have include "Linewidth.h" in DrawTestSuite.h

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  • On OSX, how do I gradient fill a path stroke?

    - by Emiel
    Using the plethora of drawing functions in Cocoa or Quartz it's rather easy to draw paths, and fill them using a gradient. I can't seem to find an acceptable way however, to 'stroke'-draw a path with a line width of a few pixels and fill this stroke using a gradient. How is this done?

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  • Drawing many images inside UIImageView

    - by dusker
    Hi all, i'm looking for a way to draw multiple images (downloaded from a webservice) inside a single uiimageview. So it'd go like i downloaded image #1, and i'd like to draw it inside rect (0,0,100,100) then #2 at (0,100,100,100) etc. I'd like to then be able to take the entire composition and save it as an image in camera roll. thanks in advance for help greetings peter

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  • drawing arrows on a line defined by a set of points( for tracking)

    - by sirvan
    hi i have a set of point which define a route. and i must draw their so vehicle moving arrow denoted. this ponit may be form a curve... i want to draw arrows on the reout to define witch arrow vehicle goes, i have a mapviewr java applet and the last i must to do is this work, i want to define arrows on every 10 point on the rout a thing like this

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  • Google Chart Number formatting

    - by MizAkita
    I need to format my pie and column charts to show the $ and comma in currency format ($###,###) when you hover over the charts. Right now, it is displaying the number and percentage but the number as #####.## here is my code. Any help would be appreciated. // Load the Visualization API and the piechart package. google.load('visualization', '1.0', {'packages':['corechart']}); // Set a callback to run when the Google Visualization API is loaded. google.setOnLoadCallback(drawChart); var formatter = new google.visualization.NumberFormat({ prefix: '$' }); formatter.format(data, 1); var options = { pieSliceText: 'value' }; // Callback that creates and populates a data table, // instantiates the pie chart, passes in the data and // draws it. function drawChart() { // REVENUE CHART - Create the data table. var data4 = new google.visualization.DataTable(); data4.addColumn('string', 'Status'); data4.addColumn('number', 'In Thousands'); data4.addRows([ ['Net tution & Fees', 213.818], ['Auxiliaries', 30.577], ['Government grants/contracts', 39.436], ['Private grants/gifts', 39.436], ['Investments', 10.083], ['Clinics', 14.353], ['Other', 5.337] ]); // EXPENSES CHART - Create the data table. var data5 = new google.visualization.DataTable(); data5.addColumn('string', 'Status'); data5.addColumn('number', 'Amount'); data5.addRows([ ['Instruction', 133.868], ['Sponsored Progams', 34.940], ['Auxiliaries', 30.064], ['Academic Support', 25.529], ['Depreciation & amortization', 18.548], ['Student Services', 22.626], ['Plant operations & maintenance', 18.105], ['Fundraising', 13.258], ['Geneal Administration', 11.628], ['Interest', 6.846], ['Student Aid', 1.886], ]); // ENDOWMENT CHART - Create the data table. var data6 = new google.visualization.DataTable(); data6.addColumn('string', 'Status'); data6.addColumn('number', 'In Millions'); data6.addRows([ ['2010', 178.7], ['2011', 211.693], ['2012', 199.3] ]); // Set REVENUE chart options var options4 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set EXPENSES chart options var options5 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':550, 'height':250}; // Set ENDOWMENT chart options var options6 = { is3D: true, fontName: 'Arial', colors:['#AFD8F8', '#F6BD0F', '#8BBA00', '#FF8E46', '#008E8E', '#CCCCCC', '#D64646', '#8E468E'], 'title':'', 'width':450, 'height':250}; // Instantiate and draw our chart, passing in some options. var chart4 = new google.visualization.PieChart(document.getElementById('chart_div4')); chart4.draw(data4, options4); var chart5 = new google.visualization.PieChart(document.getElementById('chart_div5')); chart5.draw(data5, options5); var chart6 = new google.visualization.ColumnChart(document.getElementById('chart_div6')); chart6.draw(data6, options6);}

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  • How to smooth the edge of a zig-zag line?

    - by Horace Ho
    Currently I draw a zig-zap line by CGContextMoveToPoint, CGContextAddLineToPoint, and CGContextStrokePath, following touchesMoved events. How can I smooth the edges of the line? Such that when the user draw a circle-like shape, the circle can be more round'ed. The GLPaint example use OpenGL, is that the only way to do it?

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  • statical graph for my website

    - by rabeea
    i have a freelance work website where programmers bid on projects. i want to draw a bell curve/ normal distribution chart for the bids placed on each project to show the percentage of bids higher or lower than the average bid. is there any statistical tool available that could take the data from the site and draw a graph?

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  • How to convert any text/font to its bezier path representation?

    - by yizzreel
    I have a bezier path library to draw complex bezier paths without problem. Now, I need to know how to read a text or font and extract its path information to draw it as a path instead of as text. I came across a C applicaiton, FontForge. It does exactly what I need, picks any font and extract its path information. But what I need to know is how it does it to add that feature to my drawing library.

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  • Rtsp Live Stream Android

    - by Filiz Gökçe
    I try to make live stream on android, I try lots of ways, but none of them doesnt work. Could you help me ? This is example of rtsp; mMediaPlayer = new MediaPlayer(); mMediaPlayer.setDataSource(KralStream.getTvStreamUrl().toString()); mMediaPlayer.setDisplay(holder); mMediaPlayer.prepareAsync(); mMediaPlayer.setOnBufferingUpdateListener(this); mMediaPlayer.setOnCompletionListener(this); mMediaPlayer.setOnPreparedListener(this); mMediaPlayer.setOnVideoSizeChangedListener(this); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mMediaPlayer.setLooping(true); Exeption :05-26 10:22:46.186: ERROR/MediaPlayerService(10157): create PVPlayer 05-26 10:23:06.382: ERROR/PlayerDriver(10157): Command PLAYER_INIT completed with an error or info -1 05-26 10:23:06.382: ERROR/MediaPlayer(23800): error (1, -1) 05-26 10:23:06.382: ERROR/MediaPlayer(23800): Error (1,-1) rtsp; VideoView videoView=(VideoView)findViewById(R.id.videoView1); Uri uri = Uri.parse("rtsp://strm-3.tr.medianova.tv/rkraltv/rkraltv"); videoView.setVideoURI(uri); videoView.start(); Gives message;"Sorry, this video connot ve played." Exeptions;05-26 10:40:08.979: ERROR/MediaPlayerService(10157): create PVPlayer 05-26 10:40:09.188: INFO/ActivityManager(10163): Displayed activity com.giantrabbit.nagare/.KralTvNow: 433 ms (total 433 ms) 05-26 10:40:11.702: WARN/PowerManagerService(10163): Timer 0x3-0x3|0x1 05-26 10:40:29.061: WARN/MediaPlayer(24284): info/warning (1, 26) 05-26 10:40:29.061: INFO/MediaPlayer(24284): Info (1,26) 05-26 10:40:29.100: ERROR/PlayerDriver(10157): Command PLAYER_INIT completed with an error or info -1 05-26 10:40:29.104: ERROR/MediaPlayer(24284): error (1, -1) 05-26 10:40:29.108: ERROR/MediaPlayer(24284): Error (1,-1) rtsp; mPreview = (SurfaceView) findViewById(R.id.surface); holder = mPreview.getHolder(); holder.addCallback(this); holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); extras = getIntent().getExtras(); public void play() { try { Uri video = KralStream.getTvStreamUrl(); Toast.makeText(this, video.toString(), Toast.LENGTH_SHORT).show(); mMediaPlayer = new MediaPlayer(); mMediaPlayer.setDataSource(path); mMediaPlayer.setDisplay(holder); mMediaPlayer.prepare(); mMediaPlayer.setOnBufferingUpdateListener(this); mMediaPlayer.setOnCompletionListener(this); mMediaPlayer.setOnPreparedListener(this); mMediaPlayer.setOnVideoSizeChangedListener(this); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); } catch (Exception e) { Log.e(TAG, "error: " + e.getMessage(), e); } } Exeption ; 05-26 10:36:57.589: ERROR/MediaPlayerService(10157): create PVPlayer 05-26 10:37:20.542: ERROR/PlayerDriver(10157): Command PLAYER_INIT completed with an error or info -1 05-26 10:37:20.542: ERROR/MediaPlayer(24240): error (1, -1) 05-26 10:37:20.565: WARN/PlayerDriver(10157): PVMFInfoErrorHandlingComplete 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): error: Prepare failed.: status=0x1 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): java.io.IOException: Prepare failed.: status=0x1 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.media.MediaPlayer.prepare(Native Method) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at com.giantrabbit.nagare.KralTvNow.play(KralTvNow.java:162) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at com.giantrabbit.nagare.KralTvNow.surfaceCreated(KralTvNow.java:215) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.SurfaceView.updateWindow(SurfaceView.java:536) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:339) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.View.draw(View.java:6796) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.widget.FrameLayout.draw(FrameLayout.java:352) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.View.draw(View.java:6796) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.widget.FrameLayout.draw(FrameLayout.java:352) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1894) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewRoot.draw(ViewRoot.java:1407) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewRoot.performTraversals(ViewRoot.java:1163) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.os.Handler.dispatchMessage(Handler.java:99) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.os.Looper.loop(Looper.java:123) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at android.app.ActivityThread.main(ActivityThread.java:4627) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at java.lang.reflect.Method.invokeNative(Native Method) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at java.lang.reflect.Method.invoke(Method.java:521) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) 05-26 10:37:20.682: ERROR/MediaPlayerDemo(24240): at dalvik.system.NativeStart.main(Native Method) 05-26 10:37:20.737: INFO/MediaPlayer(24240): Info (1,26) 05-26 10:37:20.737: ERROR/MediaPlayer(24240): Error (1,-1) 05-26 10:37:20.868: INFO/ActivityManager(10163): Displayed activity com.giantrabbit.nagare/.KralTvNow: 25864 ms (total 25864 ms) 05-26 10:37:23.777: WARN/PowerManagerService(10163): Timer 0x3-0x3|0x1 This is example of http ; mMediaPlayer = new MediaPlayer(); mMediaPlayer.setDataSource("http://ikral.garantisistem.com:1935/ikral/smil:kral.smil/playlist.m3u8"); mMediaPlayer.setDisplay(holder); mMediaPlayer.prepareAsync(); mMediaPlayer.setOnBufferingUpdateListener(this); mMediaPlayer.setOnCompletionListener(this); mMediaPlayer.setOnPreparedListener(this); mMediaPlayer.setOnVideoSizeChangedListener(this); mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); mMediaPlayer.setLooping(true); Exeption: 05-26 10:16:24.276: ERROR/MediaPlayerService(10157): create PVPlayer 05-26 10:16:24.292: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferWriteDataStreamImpl 05-26 10:16:24.346: INFO/PlayerDriver(10157): buffering (100) 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.346: ERROR/(10157): IIIIIII Inside Constructor of PVMFMemoryBufferReadDataStreamImpl 05-26 10:16:24.350: WARN/MediaPlayer(23736): info/warning (1, 26) 05-26 10:16:24.354: ERROR/PlayerDriver(10157): Command PLAYER_INIT completed with an error or info -10 05-26 10:16:24.354: ERROR/MediaPlayer(23736): error (-10, -10) 05-26 10:16:24.354: WARN/PlayerDriver(10157): PVMFInfoErrorHandlingComplete 05-26 10:16:24.393: INFO/MediaPlayer(23736): Info (1,26) 05-26 10:16:24.393: ERROR/MediaPlayer(23736): Error (-10,-10) Htttp; VideoView videoView=(VideoView)findViewById(R.id.videoView1); Uri uri = Uri.parse("http://ikral.garantisistem.com:1935/ikral/smil:kral.smil/playlist.m3u8"); videoView.setVideoURI(uri); videoView.start(); Gives message;"Sorry, this video connot ve played." Filiz Gökçe

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  • Resize form objects in Java

    - by PeerFull
    I have a Java applet, which is a form that draw shapes into it (Rect, Oval, Line). Each shape is represented by 2 points and can draw itself to the form. When the JApplet form resizes, I need to resize the shapes also while keeping the aspect ratio. I didn't find an high quality solution for doing this that solves this problem. Tried to write a solution from this, but it came up as lousy when tested, Can someone publish an example code for doing that please?

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  • Get highlighted state for NSButtonCell

    - by dvg
    I have a NSTableView that contains a NSButtonCell in one of the columns. To draw a custom background in neighbor cells (based on NSTextFieldCell) I use isHighlighted method: - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView { if ([self isHighlighted]) { //here I draw the cell background But for NSButtonCell isHighlighted shows only the button pressed state. How to determine when the NSButtonCell is selected, i.e. when it's highlighted in the row?

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  • Separation of domain and ui layer in a composite

    - by hansmaad
    Hi all, i'm wondering if there is a pattern how to separate the domain logic of a class from the ui responsibilities of the objects in the domain layer. Example: // Domain classes interface MachinePart { CalculateX(in, out) // Where do we put these: // Draw(Screen) ?? // ShowProperties(View) ?? // ... } class Assembly : MachinePart { CalculateX(in, out) subParts } class Pipe : MachinePart { CalculateX(in, out) length, diamater... } There is an application that calculates the value X for machines assembled from many machine parts. The assembly is loaded from a file representation and is designed as a composite. Each concrete part class stores some data to implement the CalculateX(in,out) method to simulate behaviour of the whole assembly. The application runs well but without GUI. To increase the usability a GUi should be developed on top of the existing implementation (changes to the existing code are allowed). The GUI should show a schematic graphical representation of the assembly and provide part specific dialogs to edit several parameters. To achieve these goals the application needs new functionality for each machine part to draw a schematic representation on the screen, show a property dialog and other things not related to the domain of machine simulation. I can think of some different solutions to implement a Draw(Screen) functionality for each part but i am not happy with each of them. First i could add a Draw(Screen) method to the MachinePart interface but this would mix-up domain code with ui code and i had to add a lot of functionality to each machine part class what makes my domain model hard to read and hard to understand. Another "simple" solution is to make all parts visitable and implement ui code in visitors but Visitor does not belong to my favorite patterns. I could derive UI variants from each machine part class to add the UI implementation there but i had to check if each part class is suited for inheritance and had to be careful on changes to the base classes. My currently favorite design is to create a parallel composite hierarchy where each component stores data to define a machine part, has implementation for UI methods and a factory method which creates instances of the corresponding domain classes, so that i can "convert" a UI assembly to a domain assembly. But there are problems to go back from the created domain hierarchy to the UI hierarchy for showing calculation results in the drawing for example (imagine some parts store some values during the calculation i want to show in the schematic representation after the simluation). Maybe there are some proven patterns for such problems?

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  • Smooth Text On Glass

    - by j-t-s
    Hi All I have seen many other samples out there that draw smooth text on glass. But I can't use them. I need every single label that gets added at runtime to be smooth. I can't just "draw" text onto the screen. Is this at all possible, and are there and sources around? Thank you

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  • Alternate for MoveTo and LineTo in win32, MFC

    - by mukesh
    Hi i am working on some high resolution display features in which have to draw the vertical line , i am using Moveto() and lineTO() , but it is much time taking... can anyone suggest me , what we can use instead of it ...to optimize the performance... see the scene is , in order to draw 100 Vertical lines it is taking 84ms time, we need to reduce it to 5 ms something.. please refer me any alternate fot that. Thanks, Mukesh

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  • Build a custom drawn control for .net compact framework

    - by Hinek
    I just started on the .net compact framework. I want to draw a Sudoku field on the screen. So I put down a PictureBox and defined a method for the Paint event: private void pictureBoxPlayfield_Paint(object sender, PaintEventArgs e) { // use e.Graphics to draw the grid, numbers and cursor } This works, but you can see as the grid is drawn. So my question is, what is the right/better way to create such a custom control? Is there maybe a way to enable double buffering?

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  • OpenGL 2D editor ?

    - by Fevos
    I want to draw different 2D objects in OpenGL for example a path/Road ,is there any program i could draw them using a GUI then transfer them to points so i could use them in my program ?

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  • Why are my lines getting thicker and thicker?

    - by mystify
    I try to draw some lines with different colors. This code tries to draw two rectangles with 1px thin lines. However, the second rectangle is drawn with 2px width lines, while the first one is drawn with 1px width. - (void)addLineFrom:(CGPoint)p1 to:(CGPoint)p2 context:(CGContextRef)context { // set the current point CGContextMoveToPoint(context, p1.x, p1.y); // add a line from the current point to the wanted point CGContextAddLineToPoint(context, p2.x, p2.y); } - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGPoint from, to; // ----- draw outer black frame (left, bottom, right) ----- CGContextBeginPath(context); // set the color CGFloat lineColor[4] = {26.0f * colorFactor, 26.0f * colorFactor, 26.0f * colorFactor, 1.0f}; CGContextSetStrokeColor(context, lineColor); // left from = CGPointZero; to = CGPointMake(0.0f, rect.size.height); [self addLineFrom:from to:to context:context]; // bottom from = to; to = CGPointMake(rect.size.width, rect.size.height); [self addLineFrom:from to:to context:context]; // right from = to; to = CGPointMake(rect.size.width, 0.0f); [self addLineFrom:from to:to context:context]; CGContextStrokePath(context); CGContextClosePath(context); // ----- draw the middle light gray frame (left, bottom, right) ----- CGContextSetLineWidth(context, 1.0f); CGContextBeginPath(context); // set the color CGFloat lineColor2[4] = {94.0f * colorFactor, 94.0f * colorFactor, 95.0f * colorFactor, 1.0f}; CGContextSetStrokeColor(context, lineColor2); // left from = CGPointMake(200.0f, 1.0f); to = CGPointMake(200.0f, rect.size.height - 2.0f); [self addLineFrom:from to:to context:context]; // bottom from = to; to = CGPointMake(rect.size.width - 2.0f, rect.size.height - 2.0f); [self addLineFrom:from to:to context:context]; // right from = to; to = CGPointMake(rect.size.width - 2.0f, 1.0f); [self addLineFrom:from to:to context:context]; // top from = to; to = CGPointMake(1.0f, 1.0f); [self addLineFrom:from to:to context:context]; CGContextStrokePath(context); }

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  • How to attach a line to a moving object?

    - by snow-spur
    Hello i have designed a maze and i want to draw a path between the cells as the 'person' moves from one cell to the next. So each time i move the cell a line is drawn I have done this so far but do not want to show my full code However i get an error saying Circle has no attribute center my circle which is my cell center = Point(15, 15) c = Circle(center, 12) c.setFill('blue') c.setOutline('yellow') c.draw(win) p1 = Point(c.center().getx(), c.center().gety()) this bit is in my loop p2 = Point(getx(), gety()) line = graphics.Line(p1, p2)

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