android - Convert screen coordinate to OpenGL vertex float point -

-

When I touch the user screen, I am using OpenGL 2.0 Ess. In order to create an object, according to many samples, I need to define the top by using the float value of x, y, z in an array. I have stumbled on just one problem that I get these float numbers from the screen coordinates Can not Define I have made a line class based on the triangle object class provided by the Android sample.

For now, in my GLSurfaceView class I use the onTouchEvent method, so in my renderer, I use this formula to coordinate the screen for the float point. Float Line Coins [] = New Float [6]; Line quotes [0] = (float) (M.P.R. * 2.0 / WIDTH - 1.0); Line Coords [1] = (Float) (MPR-2.0 / HEIGHT + 1.0); Line quotes [2] = 0.0 f; Line quotes [3] = (float) (x * 2.0 / WIDTH - 1.0); Line quotes [4] = (float) (y * -2.0 / HEIGHT + 1.0); Line quotes [5] = 0.0 f; Originally the formula has followed the glotho array but the result is not satisfactory because it appears that there is a vertical mirror in the center of the screen which pulls the path to the right, if I touch the left and on the other side .

So, what is the best way to convert to screen coordinates touching?

You use gluUnProject Can get or reverse the modulation and projection matrix and calculation, moving from screen to space coordinates.



Comments

Post a Comment

Popular posts from this blog

ios - Adding an SKSpriteNode to SKScene from a child SKSpriteNode -

-
I have a SKScene where I am adding an SKSpriteNode I have subclassed the SKSpriteNode class to create this node. In the subclass I am defining some SKActions on Sprite. What do I want to do when the end of this phantom ends the SKAction sequence, then I add a new Prayer node to this scene. How is this possible. The following code is mine: The code for the sequence is that I'm running on the Scansprinitode subclass (TEMissileNode): - SKAction * moveDown = [SKAction moveToY: Self.position.y - 20 Duration: 0.2]; SKAction * animation = [SKAction animateWithTextures: textures timePerFrame: time / 7]; SKAction * moveMissileProjectile = [SKAction Moving: Pointoffscreen Term: Time]; SKAction * group = [SKAction group: @ [animation, movement projectile]]; SKAction * Sequence = [SKAction Sequence: @ [Hilldown, Group, [SKAction removalFromParent]]]; [Self run action: sequence]; From the main scene, I call those actions that execute these tasks TEMissileNode * missile = [tmissil...
Read more

Matlab transpose a table vector -

-
An embarrassing simple question seems to be, but how can I move a Matlab table vector? aTableT = aTable '; I tried a standard syntax for the simple interaction of a line vector to a line vector aTable : ATableT = reshape (aTable, 1, Height (aTable)); and aTableT = rot90 (aTable); According to the head, the last time table should work for table, see. However, I get this error code: Error type in using table / permit (line 396) Undefined function 'permute' for the input arguments. Error in rot 90 (line 29) b = magnitude (b, [2 1 3: ndims (a)]); NB: fliplr is not useful either pretty sure I have covered clear angles - any ideas? Thanks! Try changing your table into an array, move it, then back to a table In other words, try doing this: aTableArray = table2array (aTable); ATableT = array 2table (aTableArray. '); I have also read the document for rot90 , and it says that rot90 is definitely working for tables Do, and I find you...
Read more

c# - Textbox not clickable but editable -

-
I have a small form with 10 text boxes, I have set them in the correct tab order. I want them on my tab service I was wondering if there is a way to set the text box so that they can be selected for editing until they are tabbed. That is ... I do not want the end user to edit the text box to click on them, I just want to make them editable through tabu. this should do the trick public partial category poor text box: Text Box {Safe Override Zero WndProc (Ref: Message Message) {if (m.msg == (Int) WM.LBUTTONDOWN) {Return; // mount down events} base.WndProc (ref m); }} Window message enum can be found. How to do this without anherizing: text box : class EatMouseDown: netwindows {safe override zero WndProc (ref message message) {if (m.msg == (int) WM.LBUTTONDOWN) {return; } Base.WandProc (Ref M); }} Safe Override Zero Onload (EventEurge E) {base.OnLoad (e); How to do this without any part: left a clean part, whatever is important, this can be a buggy but it works R...
Read more