Java-Gaming.org Hi !
 Featured games (90) games approved by the League of Dukes Games in Showcase (777) Games in Android Showcase (231) games submitted by our members Games in WIP (856) games currently in development
 News: Read the Java Gaming Resources, or peek at the official Java tutorials
Pages: [1]
 ignore  |  Print
 [SOLVED] 3D HUD Positioning  (Read 1972 times) 0 Members and 1 Guest are viewing this topic.
Conzar

Junior Devvie

There is nothing common about common sense

 « Posted 2006-11-10 20:06:10 »

Hello.
I was rending my hud graphics ontop of the canvas, but as explained in a previous thread; this was too much of a performance hog.

So I've converted to using seperate QuadArrays for each hud component. By doing this, I am having trouble positioning the components in the scene.

Meaning, how do I know where the edge of the screen is inside of the canvas? With the previous method (drawing ontop of the canvas), I could get the size of the Frame to determine where the components were placed.

Is there a way to do this in J3D? I now this should be dependent on the Z coordinate. Has anyone figured this out before?

Thanks

Ubuntu
Conzar

Junior Devvie

There is nothing common about common sense

 « Reply #1 - Posted 2006-11-12 18:00:13 »

So the placement of the components (and their sizes) is dependent on the aspect ratio of the screen (rather the sizes should be dependant).

So what I did was the following:
* All components' positions and sizes are relative (from 0.0 - 1.0).
* Find the aspect ratio
* set size and position based on aspect

Here is how I found out the aspect ratio
 1  2 `For 4:3 then resx/resy*3 == 4For 16:9 then resx/resy*9 == 16`

Now we set the size of the components (lets say our aspect is 4:3)
then
 1  2  3 `component.width3d = component.width*4fcomponent.height3d = component.height*3f;component.pos3d = new Vector3d(component.x*4f,component.y*3f,0f);`

We also have to set the z-axis for all the components.  You can do this a number of ways.  I choose to put all my components in a TransformGroup and then move that group's position.
For the way I have things setup, the vector I used to move the group is
 1 `[-2f,1.5f,-5f]`

So for 4:3, I based my screen size off of the width being 4 and the height of 3 (meters).
Because 0,0 is in the middle of the screen (as opposed to awt were that coordinate is on the top left), we need to adjust.
So we move everything over by half of the dimension (IE half of width is 2).
As for the Z-axis, I just got this number by trail and error.

Ubuntu
Pages: [1]
 ignore  |  Print

 hadezbladez (289 views) 2018-11-16 13:46:03 hadezbladez (157 views) 2018-11-16 13:41:33 hadezbladez (290 views) 2018-11-16 13:35:35 hadezbladez (71 views) 2018-11-16 13:32:03 EgonOlsen (2150 views) 2018-06-10 19:43:48 EgonOlsen (2152 views) 2018-06-10 19:43:44 EgonOlsen (1364 views) 2018-06-10 19:43:20 DesertCoockie (1983 views) 2018-05-13 18:23:11 nelsongames (1600 views) 2018-04-24 18:15:36 nelsongames (2248 views) 2018-04-24 18:14:32
 KaiHH 15x LiquidNitrogen 14x Spasi 13x orange451 13x bullen 9x 65K 9x NuclearPixels 7x polinc 7x Zemlaynin 7x VaTTeRGeR 5x hadezbladez 3x ral0r2 3x CommanderKeith 2x SHC 2x berzas 1x Riven 1x
 Deployment and Packagingby mudlee2018-08-22 18:09:50Java Gaming Resourcesby gouessej2018-08-22 08:19:41Deployment and Packagingby gouessej2018-08-22 08:04:08Deployment and Packagingby gouessej2018-08-22 08:03:45Deployment and Packagingby philfrei2018-08-20 02:33:38Deployment and Packagingby philfrei2018-08-20 02:29:55Deployment and Packagingby philfrei2018-08-19 23:56:20Deployment and Packagingby philfrei2018-08-19 23:54:46
 java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org