Bitmap Rotation Using GDI+
Dec 26, 2009explain how Graphics.RotateTransform is working?
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Excel - Code In VBA And Recording A Macro - Input A Values For The X Axis Rotation And The Y Axis Rotation
Sep 16, 2009I am having some major problems with the code in VBA and recording a macro didn't get me anywhere nor is the VBA help file. I have to have it so that I can input a values for the x axis rotation and the y axis rotation so that my 3d surface graph will rotate whatever values I input, the 3d surface graph will rotate those degrees. I also have to have a method for having the default rotation. I was also wondering how to put scroll bars for the x and y rotation. The only other thing I am having trouble with is having an input to check box for right angle axes. So far I have two cells for entering the x rotation value and the y rotation value. I also already have my 3d surface graph.
View 3 RepliesSystem Memory In Bitmap - Using Bitmap To Show Picture Box Like Slideshow Using Timer
Jul 3, 2011I'm using Bitmap to show picture box like slideshow using Timer. For each timer interval, I've to go for new instance of Bitmap, there System memory increases to 1MB, How to resolve this, 'BG is picture box
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tic Dim img As Bitmap
img = New Bitmap(System.Drawing.Bitmap.FromFile(FileIO.FileSystem.GetFiles
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Use A ToolTip Directly To A Bitmap Object (System.Drawing.Bitmap)?
Dec 15, 2010I'm trying to use a ToolTip directly to a Bitmap Object (System.Drawing.Bitmap), aparently I can't do this because Bitmap isnt a Windows Control.
View 1 RepliesCreate Monochrome Bitmap From Semi Transparent Bitmap?
Sep 17, 2011how can i create a monochrome bitmap from a semi transparent bitmap in vb.net? the bmp is for a transparency mask image for an icon i'm trying to create with the CreateIconIndirect API function.
i'm using vb2008 .Net3.5, but i would prefer an answer that would also work in vb2005
Axis Of Rotation In Vb?
Jan 29, 2011I have created some 3d models(VB) for display in a WPF 3d Viewport and would like to rotate them. I would like to rotate them about an axis of rotation defined by a line through two 3d points. All the examples seem to rotate about one of X Y or Z axes and are not helpful for a more general approach. The angle of rotation is easily found. My maths is a bit rusty now so is there a function that would calculate the axis easily ?
View 2 RepliesExtraxct A Rectangle Bitmap From A Big Bitmap?
May 26, 2011Here is a short program to demonstrate my question. I just want to extraxct a rectangle bitmap from a big bitmap.Code as follows:
Private
Sub Button3_Click(ByVal sender
As System.Object,[code]....
Execution stops when hitting the Dim cloneBitmap statement, which should have created a bitmap out of the rectangle cut out.The message is:
"MissingMemeberException was unhandled.
No default member was found for type 'bitmap"
I just don't get it. Seems that the method Clone(Rectangle, PixelFormat was not found.
Parameter Is Not Valid - Bitmap Bmp = New Bitmap()
Feb 10, 2010I have a grass image located here in my directory. I want to just create a Bitmap, but I am getting an error. (Parameter is not valid.) Immediate Window: A first chance exception of type 'System.ArgumentException' occurred in System.Drawing.dll
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private void Form1_Load(object sender, EventArgs e)
{
Bitmap bmp = new Bitmap("grass.jpg");
}
bertino
3D Object Rotation In 2008?
May 19, 2009I'm developing a sun shading analysis tool, and part of the analysis involves rotating a house (modelled as a cube consisting of 8 points) by the solar azimuth and solar altitude angles. The reason for this is to determine if the wall in question is facing the sun, and if so I run a shading analysis using a scanline algorithm to determine the percentage of wall plane that is in shade from a tree in the yard (this is modeled using overlapping 2D polygons). The purpose of the rotation and tilt of the object is so that the wall plane is directly perpendicular to the sun, so that the analysis can be done in 2D as opposed to 3D.
I first rotate each point of the house (which is stored in an array) through the azimuth, and then tilt it up through the solar altitude angle. I have set up my 3D coordinate system using the standard right-hand rule for orientation of the x,y,z axes. I'm using a basic rotation matrix as follows:For the azimuth, I am rotating around the z-axis, so I am using the following matrix transformation.
[x',y'] = [x*cos(azimuth) - y*sin(azimuth) , x*sin(azimuth) + y cos(azimuth)]For the altitude, I am rotating the object about the x-axis to tilt it up. I use the initial z-coordinate and the transformed y'-coordinate for the altitude tilt calculation.Each point, when completely rotated and tilted, will have a distinct set of coordinates: [x', y'', z'].Individually, the rotation and tilt work fine. But when I try to do them consecutively, I run into problems.
Change Rotation Of A PDF Document?
May 3, 2012I am first time working on PDF documents.I was searching on Rotation of a PDF page. I got some code samples regarding rotations by 90,180,270,360 degrees.
But my problem is that if there is a very small rotation required of the order of few degrees .. Is there any way that we can specify an angle using a slider bar or use the mouse to click and rotate the PDF page...
Does Not Keep Track Of The Actual Rotation
Apr 1, 2011I have a screen full of puzzle peices they are all rotated at different angles (90,180,270). is there a way to track the peices rotation? I was thinking of using a 2d array to store there rotation. however, I am using this code to rotate the peices:
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Get The Center Point Of A Rotation?
Jan 24, 2010i'm developing a simple 2d animation program. my task is to get the center point of a rotation, for example: at the frame 0 there is a rectangle at x,y coordinates and with 0° of rotation at the frame 10 there is the same rectangle, translated and rotated what is the center point around which the rotation occurred? This is not really a question about programming, i know, rather than a problem of geometry.
View 1 RepliesRotate Image Like 3d Rotation?
May 12, 2012how to rotate image like 3d rotation?
View 2 RepliesC++ - Direction Of Shortest Rotation Between Two Vectors
Jun 13, 2012my question is regarding working out the direction of the smallest angle between two vectors in 2D. I am making a game in C++ where one of the obstacles is a heat seeking missile launcher. I have it working by calculating the vector between the target and bullet, normalising the vector and then multiplying it by its speed. However, I am now coming back to this class to make it better. Instead of instantly locking onto the player I want it to only do so only when the bullets vector is within a certain angle (the angle between the bullets vector and the vector bulletloc->target). Otherwise I want it to slowly pan towards the target by a degrees thus giving the player enough space to avoid it. I have done all this (in a vb.net project so i could simplify the problem, work it out then re write in in C++). However the bullet always rotates clockwise towards the target even if the quickest route would be counter clockwise. So the problem is working out the direction to apply the rotation in so the smallest angle is covered. Here is my code so you can try and see what I am describing:
Function Rotate(ByVal a As Double, ByVal tp As Point, ByVal cp As Point, ByVal cv As Point)
'params a = angle, tp = target point, cp = current point, cv = current vector of bullet'
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I had was to work out the bearing of the two vectors and if the difference is greater than 180 degrees, rotate clockwise otherwise rotate counter clockwise
DirectX.Direct3D Rotation And Textures?
Mar 12, 2011SI like doing random things like 3D objects inside a windows form. With that said, I'm creating an application that will, eventually, write the code for me, after I do it myself visually.If you run the app it will make some more sense I guess.Now, to rotate the cubes, I'm using
.Transform.World = Matrix.RotationYawPitchRoll(CSng(CubeRx(1) / 10), CSng(-CubeRy(1) / 10), CSng(CubeRz(1) / 10))
now I do not want the world to rotate, just my individual cubes.Here's an example of me referring to my cube in action
If howmanycubes >= 1 Then
' vb2 = New VertexBuffer(GetType(CustomVertex.PositionNormalColored), 36, d, Usage.Dynamic And Usage.WriteOnly, CustomVertex.PositionColored.Format, Pool.Default)
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how to apply textures to the cube.instructions:When running the program, type in values on right side and click create cube.before you click create cube again, those same text boxes will adjust your current cube.Then when you click create new, it places another cube ontop of your current cube, so you'll need to give it new values.Not much validation is going on so some bad values will cause crashes.
Get Text Field Rotation With ITextSharp?
Jun 4, 2009What I need to do is query an iTextSharp AcroField to check if it is rotated, and if so capture the value of the rotation.So If I have the following field:
Dim af As iTextSharp.text.pdf.AcroFields = stamper.AcroFields
Dim afi As iTextSharp.text.pdf.AcroFields.Item
afi = af.GetFieldItem("fieldName")
What do I need to do to get the rotation (in degrees) of that specific field?
Custom User Control Graphics Rotation?
May 31, 2010I'm trying to build a dial control as a custom user control in VB.NET. I'm using VS2008.so far I have managed to rotate image using graphics.rotatetransform . however, this rotate everything. Now I have a Bitmap for the dial which should stay stable and another Bitmap for the needle which I need to rotate.so far i've tried this:
Dim gL As Graphics = Graphics.FromImage(bmpLongNeedle)
gL.TranslateTransform(bmpLongNeedle.Width / 2, bmpLongNeedle.Height * 0.74)
gL.RotateTransform(angleLongNeedle)[code].....
As I understand it, the image of the needle should be rotated at angle "angleLongNeedle" although i'm placing the rotated image at 0,0. However, the result is that the Needle doesn't get drawn on the control.
Extract Transform And Rotation Matrices From Homography?
Sep 12, 2011I have 2 consecutive images from a camera and I want to estimate the change in camera pose:
I calculate the optical flow:
Const MAXFEATURES As Integer = 100
imgA = New Image(Of [Structure].Bgr, Byte)("pic1.bmp")
imgB = New Image(Of [Structure].Bgr, Byte)("pic2.bmp")
grayA = imgA.Convert(Of Gray, Byte)()
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How do I calculate the new position and lookat?
If I'm doing this all wrong or if there's a better method,
Find Shift And Rotation Between Same Two Images Using Programming Languages C++ Or C#?
Sep 1, 2009How to find shift and rotation between same two images using programming languages vb.net or C++ or C#?
View 5 RepliesApplying Both A Rotation And Color Adjustment To A GDI DeviceContext Causes The Colours To Be Reset?
Sep 1, 2011I am using API calls to transform a Bitmap object. I have various physical transformations (rotation, flipping, scaling, displacement) as well as some colour adjustments (inversion, brightness and contrast)Everything works fine except for when I use the rotation or shear transformations in combination with the colour adjustment. In that case the colours revert to the original image.The interesting thing about this problem is that it seems to be dependent on the off-diagonal factors (eM12 and eM21 below) in the XForm matrix. For example, here is the rotation matrix:
Public Sub RotateClockwise(Radians As Single)
With XFormMatrix
.eM11 = Cos(Radians)[code]....
is there some way I can use both SetWorldTransform and SetColorAdjustment when using non-zero values for the off-diagonal factors in my XForm transformation?
Game Programming :: Screen Rotation Handling With Compact Framework
Oct 4, 2008I am developing a game in compact framework. In Mobile Devices there is a button that Rotates the screen by 90 degrees so you can hold the mobile device the way that suits you. The problem is that i want to handle that in my game, so if i see that the screen has rotated the game will pause.
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Creating .BMP File From Bitmap.Save(Path, ImageFormat.Bmp) Differs From Using Bitmap.Save(Path)?
Oct 1, 2011The code below reads an Icon from an .ico file, converts the Icon read to a Bitmap and saves the bitmap using:
Bitmap.Save(PathA)
Then does:
PanelShowWrittenIconA.BackgroundImage = New Bitmap(PathA)
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VS 2010 Way To Control Mouse Wheel Rotation With A Simple API / Without To Hook Mouse?
May 24, 2012The GetAsyncKeyState Api does'nt recognizes the mouse wheel rotation, I see.Is there way to control the mouse wheel rotation (always, not only when the pointer is over a form of mine) with a simple API, without to Hook the mouse?
View 2 RepliesVS 2010 Object Rotation And Move Object With Arrow Keys?
Feb 8, 2011I want to learn how to rotate an object by direction and speed and also how to move an object using the arrow keys?
View 2 RepliesGame Programming :: Game Movement By Rotation Direction?
May 14, 2012basically i'm trying to move the Player by rotation.I have a perfect rotation system that works with a custom picturebox control that supports rotation that i have.
View 4 RepliesCan't Get Bitmap From Dll?
Jun 27, 2009I want to get a bitmap from a dll and load it to a picturebox. The bitmap I want is in Windowssystem32msgina.dll, the bitmap ID is 20150. (this bitmap contains shutdown, restart picture) Here's the code:
Private Declare Function LoadLibrary Lib "KERNEL32" Alias "LoadLibraryA" (ByVal strFilePath As String) As Long
Private Declare Function LoadBitmap Lib "USER32" Alias "LoadBitmapA" (ByVal hInstance As
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.net - Bitmap Generation With Dot.net And Png?
Feb 2, 2011What resources I need to look for, to generate one png image out of three? Since there are sprite generators out there, that do not do what I want, I wanted to try by myself. The user interface should not be the problem, but i have no experience of generating bitmaps, especially those with transparent backgrounds. I will do that in .net. Letīs say I have 6 png files. I want to put them into one image, where there will be two rows of images in it, so 3 in row, 2 in height, 3*2. Every image might have a little different sizes, so i would need to fill up the space with, um, nothing..
View 1 RepliesHow To Clear A Bitmap
May 31, 2010I've created a bitmap on which I use setpixel to color it in. Then I display it on a picturebox. I want to clear the bitmap form time to time, reset all its pixels. I see no bitmap.clear() method and there's nothing in the documentation that seems. Short of disposing of or setting the bitmap = nothing and creating a new one, how do I wipe a bitmap?
View 8 RepliesOut Of Memory With New Bitmap
Mar 29, 2012The following code works with smaller images, but it throws an out of memory exception when the image is a png file, 8 bit depth, 13200x10234 pixels.
Using FS As New IO.FileStream(FileName, IO.FileMode.Open, IO.FileAccess.Read)
Dim B = New Bitmap(System.Drawing.Bitmap.FromStream(FS))
End Using
I'm working on a viewer that shows an image, asks the user for a window and saves the cropped image. Here is an overview of what I'm trying to achieve: The process starts with a 30+MB pdf file containing hundreds of large technical drawings. I open the file with the pdf reader, save as png 300dpi images, then I run my application that works on the saved images. I am interested on a few details of those drawings, and I have two goals:
1) Use my viewer with a subset of details instead of the pdf reader with the full set of whole images, and
2) Pick some cropped details and insert them into another application.
I start the application, look at the first image, click delete, and keep clicking delete until I find an drawing with a detail that I need. Then I draw a rectangle, save the cropped image, and repeat with 3-4 more details on the same image. Then delete the original image, go to the next, and restart the cycle. So I start with 100 large images in my folder and end with 20 small ones. At this point I can browse them very quickly and continue with the following steps (inserting them in another application).
Save Bitmap As Png-8?
May 31, 2012i want open image (png), re size and save it as png-8 with transparent i can re size and save it but this not as png-8 format !!i use this but receive this exeption
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