I'm working on a game engine, and I want to be able to draw a billboarded (i.e. rectangular to the screen) quad with the center-bottom of the quad being determined by a single point.
View 1 RepliesI was wondering if anyone could steer me to any good references to using OpenGL in vb.Net? I wanted to try a simple line drawing test to start off with, and came across many old discussions about using CsGl or the Tao Framework. But I could not get CsGL to import into Net2008 (the Add Reference window simply could not see the DLL that was clearly there when using Windows Explorer). And although I could get Tao to import OK, and found portions of one person's project, I figured that somehow the GL window he was referring to had to first be set up as a GL object (new class?).In addition, all the OpenGL books I have looked at only discuss OGL with respect to some version of C.From what I have gathered, you need a connector between vb.Net and the opengl32.dll libraries and that is what CsGL and Tao are about. But the edumucation resources seem very few.
View 13 RepliesI created a new webbrowser and it's not showing up. I can change the height but when I change the location it says can't convert integer into drawing point. I made sure it's visible and added it in the form.
[Code]....
Ok so im looking at this code and it cant possibly be right but im not sure how to do what i want.I have made a list of n points. I now want to click a button on my form and use the picturebox paint event to draw my lines between the points in the list.From what i can see i have at least two issues with this code. 1. Nowhere in this snippet do i reference the picture boxes paint event 2. I do not think that the loop i have is how to navigate through the list of Points to make my drawings.
View 14 RepliesFirst, the overall objective is to find the best point within a multipoint filled 'star', at which to start drawing text. That is, depending upon the size of the star and the number of points, there is a larger or smaller area within the points that is filled with colour. So a 5 point star has a relatively small area that is filled, in which to draw text. A 40 point star of the same radius has a much larger area filled. If I can determine the size of this area as a rectangle, then I can measure the string and draw within it using the best fit font and starting position. The code below is an attempt to answer the question but I am stuck trying to find the text area rectangle within the filled portion of the star. Some of the code exists purely to explore the means to determine how to identify this rectangle (and is probably the totally wrong direction).
The second part of the problem is in exploring the options, I tried to draw a vector to different points on the circumference of the star. This is the code highlighted. The lines drawn do not seem to be the correct length nor the correct angle but I cannot see why.[code]...
I have several picture boxes on a form (frmMain).My question is, how do I paint a point on a particular picture box at the location specified by the coordinates of the current mouse position? The snippet below shows defining some canvases and pens. But I'm not sure how to capture the mouse position when the mouse is over a particular picture box and how to paint the actual point at that location.[code]
View 3 RepliesIm getting an error right now for this code, and I'm wondering if it's me, or VB2010 has changed?
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Keys.Left Then
[code].....
Step 1 - I plot 4 random points on an image in the picture box
Step 2 - I capture the co - ordinates for all the points
Step 3 - I draw a line from point 1 to point 2 (name it line 1)
Queries :
1) I need to draw a line parallel to line 1 passing through point 3
2) I need to draw a line parallel to line 1 passing through point 4
3) Extend the line from both the ends so that I can draw a perpendicular line passing through all the 3 lines so that it becomes a rectangle
I'm just getting started, and it's as simple as that: I need guidance to draw a rectangle or place a dot or a point on Form1, in VB 2008 Express. I knew how in VB6 -- let's build on that.
View 3 RepliesI'm drawing a rectangle snapped to a grid by getting the start point(Mouse down e.location) and the end point(mouseup(e.location). The coding I'm having trouble with is having the program determine which way to draw the rectangle(where the location should be, and the height and width.) Now, this would be extremely simple if the user started their rectangle from the top left corner and ended it in the bottom right every time. But you need to be able to drag from all angles. So does anyone have some code lying around that I could look at so I could actually get my rectangles drawn right?
View 5 RepliesIf I try to draw a circle by using e.g.
Code:
e.Graphics.DrawEllipse(Pens.Red, 50.133, 100.321, 0.1, 0.1)
I will get an error message. I tried something like
Code:
Public ObjectPoint As PointF
Dim cpoint As New PointF()
cpoint.ObjectPoint = New PointF(startX, startY)
e.Graphics.DrawEllipse(Pens.Blue, cpoint.ObjectPoint, 0.4, 0.4)
but it didn't work for the location and the circle size. How to draw a circle(and rectangle) by using floating point numbers?
Dim pt As Point, is the problem here, i know that this class point can belong to the types Inventor or System drawing.I want to make it part of the System drawing, how i do this ?
View 2 RepliesI hve been working with points a lot recently, and I have been wondering if there is a way to set a point without setting point.x and point.y separately. For example for (3, 5): Point1 = (3, 5) But that isn't right
View 4 RepliesI have a Diagonal line drawn on a picture box on my forum and i need to know if the user has clicked the line I have the Start point and End Point of the Line and the mouse x,y location So i basically need to find out if the x,y of the mouse is on the line.
View 2 RepliesI'm trying to extract a piece of text from within the string, defining both a starting point and an ending point. For instance, say I want to search for the text found between "That is a " and " car" in the string "That is a red car", so it would return "red".I know you can use .SelectionStart and SelectionLength, but the length of the word can change, so the selection length can vary. What I want is to establish a specific starting point and a specific ending point from which to extract the text from the string.
View 5 RepliesI want to know if its possible to loop in a variable and grab info from point a to point b
This is what I have stored in my Variable
PHP
</div> <!-- div reviews end white-space:nowrap; margin-bottom:5px; class="reviews" -->
<div class="list_address">
[Code].....
I want to add opengl to my vb.
View 2 RepliesI was trying to learn how to do openGL within a VB .NET environment and it seems that the Tao framework or OpenTK is recommended with OpenTK having a higher recommendation so that is what I chose to try using. Since I am brand new to this, I am trying to just draw a simple box, triangle, or anything really so that I can understand it all before making more complex things. I have been unsuccessful at this so far so I will list in order what I have done so far and hopefully someone here can help me correct it or provide a new example just so I can draw a simple shape.
1) I installed OpenTK using opentk-2010-10-06.exe
2) In a new project I added the references to OpenTK.dll and OpenTK.Compatibility.dll
3) I added the control (opentk.glcontrol.dll)
4) I added the actual control to my form.Using some examples online I added the rest:
5) I wrote my references in:
Imports OpenTK
Imports OpenTK.GLControl
Imports OpenTK.Platform
[code]....
The above results in no display?
i have a picturebox which displays a map i have 2 modes add point and delete point when the user clicks the picture it creates a point on the picture where the user has clicked that works perfectly its when i try and delete the point when it doesent work :/ i have all the points loading from an xml file this is the code i have:
[Code]...
basicly i want it to when the user clicks the point it fines the x any y in the xml delete the node then delete all the points on the map then reload them all according to the xml
I wanted to install visual Basic or C++ (but Basic really seems easyer to use) with DirectX or OpenGL but I can't get it to work!I've tried Visual Basic Express 2008 and 2010 and i'm getting the same type of errors...
-> Directx
When I try this program [URL]with VB I either get
with 2008 : just a red cross on a blank screen
with 2010 : an unlimited waiting time, and when i click i get an error message that tells me to continue waiting, im forced to CTRL -ALT - DEL to shut down VB.
-> OpenGL:So i've tried a lot of times! they tell me that it's already installed on windows so i don't need any installation but then VB gives me alot of errors, telling me that some part of code isnt recognized!!
i've tried tutorials with Csgl or Tao, but none seem to work...I already got some knowlege of OpenGL but not DirectX, so could anyone please tell me which one does work on my computer and is best for creating a graphics window inside an API that i create, for instance a mob maker?
how to write program based on OpenGL in VS? cause when i begine debugging ,it says library not found..
View 13 Repliesi want to do a graphics project in Vb.net but have to use OpenGl Libraries . How do i download compatible OpenGl package and how to use them in my .net code.
View 3 RepliesI render a complex shape in OpenGL which requires a lot of calculations, is there anyway to export that to a state like a model that can be opened again later given you wont edit it again?
I can't create them outside the program (with something like Blender) since the shape is computed when the program starts. The render then gets translated, rotated, drawn over, etc. Note, that I don't need to edit the shape though, but I do want it in a 3D state so saving an image isn't an option.
i heard OpenGL is 3D and it can be used in visual basic for models and games. Now i dont know if OpenGl is a contol or coding script. But i want to know how to make a simple model in OpenGl in visual basic.
View 9 RepliesI'm trying to calculate the direction between two points on a two-dimensional grid. Actually I want to determine if that vector is within a range of two values. Suppose the grid's origin is 0,0 at the upper left corner, and 0 degrees represents north. I have a point A on that grid. I want to know if a line from point A to point B on the grid is within a range of directions between 111.8 degrees (a little south of east) and 158.2 (a little east of south). Those are approximations; the 111.8 is 90 degrees plus the arctangent of 2/5, and 158.2 is 180 minus that value. I worked out a series of calculations worthy of a medieval astronomer, but I suspect there is a simpler way. I'm going to have to do this for a variety of other vectors, and I'd like to generalize
View 4 RepliesI know how I can construct an icon setting point by point, but that isn't what I want. I want to use a bitmap file or a jpeg -is easy to convert an jpeg to an bitmap- and built an icon that looks like this picture.
View 2 RepliesI want to make a drawing application which needs a few drawing functions I cant handle myself as im not very mathematicly inclined The first on the list of functions is to create an arc from a start point, end point and radius. The method signature is as followes.
Function CreateArc(byval StartPoint as PointF, EndPoint as PointF, Raduis as single) As PointF()
'Code to create an array of points...
[Code]....
I am trying to create a tool to make terrains for my game and would like to develop it in Visual Basic Express 2010. I want to use OpenGL but am having trouble.1. Will VB support OpenGL 3.x or higher?
View 6 RepliesI am running into the strangest problem that I just can't place my finger on. I've been developing an application in VB.net for the last couple months in Windows 7. The program involves some basic OpenGL drawing and animation with basic shapes (squares and circles) and basic textures mapped onto pointlists. The time has come to distribute the program to another machine. On some machines though, I encounter problems when I'm drawing textures. I know that openGL is still functional because drawing basic squares and circles still occur, the textured objects are the only things missing.
[Code]...
i have to do a college project on this platform so i decided to learn open GL. while working with glui i am facing some problems. i downloaded glui-2.36. I thought of starting with the example1 (code added at bottom of the post) that was included in source folder of glui-2.36. i am using VB.net 2008 When i build the project it gives me 3 errors:
error C2661: 'GLUI_Checkbox::GLUI_Checkbox' : no overloaded function takes 3 arguments
error C2661: 'GLUI_Spinner::GLUI_Spinner' : no overloaded function takes 3 arguments
error C2227: left of '->set_int_limits' must point to class/struct/union/generic type
Here is cpp code:
#include <string.h>
#include <GL/glui.h>
/** These are the live variables passed into GLUI ***/
int wireframe = 0;
[code]....