3d - How to draw cuboids by defining offsets correctly in OpenGL? -


i facing following problem:

  • i want draw multiple cuboids representing items packed in container , 1 cuboid representing container. have algorithm packs container items , outputs boxes dimensions (and x,y,z offsets)

i have following input data example:

  • container dimensions (width 10, length 10, height 10)
  • box1: [width=2, length=2, height=2] position=[x=5, y=4, z=0]]
  • box2: [width=4, length=4, height=4] position=[x=5, y=0, z=0]]
  • box3: [width=5, length=5, height=5] position=[x=0, y=0, z=0]]

the solution should this:

  • use opengl beginmode quads draw cuboids.
  • start @ x=0, y=0, z=0 , draw container cuboid width, height , length.
  • start @ x=boxpositionx, y=boxpositiony, z=boxpositionz draw each of boxes cuboids.

my problems are:

  • how can tell opengl if use drawcuboid function example width=10,height=10 , length=10 should start x=0,y=0,z=0 , draw x=width,y=height,z=length , not go -x,-y , -z coordinates?
  • how can apply x-shift,y-shift , z-shift correctly?

to draw cuboids use following code (attention: use opentk opengl c# wrapper please dont try compile opengl libraries):

... // use "wireframe mode" gl.polygonmode(materialface.frontandback, polygonmode.fill);  // precalc length = (float)length / (float)650f; height = (float)height / (float)650f; width = (float)width / (float)650f;  //side 1 gl.vertex3(width, height, -length); gl.vertex3(-width, height, -length); gl.vertex3(-width, height, length); gl.vertex3(width, height, length); gl.end();  // side 2 gl.vertex3(width, -height, length); gl.vertex3(-width, -height, length); gl.vertex3(-width, -height, -length); gl.vertex3(width, -height, -length);  // side 3  gl.vertex3(width, height, length); gl.vertex3(-width, height, length); gl.vertex3(-width, -height, length); gl.vertex3(width, -height, length);  // side 4  gl.vertex3(width, -height, -length); gl.vertex3(-width, -height, -length); gl.vertex3(-width, height, -length); gl.vertex3(width, height, -length);  // side 5  gl.vertex3(-width, height, length); gl.vertex3(-width, height, -length); gl.vertex3(-width, -height, -length); gl.vertex3(-width, -height, length);  // side 6  gl.vertex3(width, height, -length); gl.vertex3(width, height, length); gl.vertex3(width, -height, length); gl.vertex3(width, -height, -length); ...

any appreciated!


Comments

Post a Comment

Popular posts from this blog

get url and add instance to a model with prefilled foreign key :django admin -

Image
i have page in each contest shown in row. each row contains contest id , link other model names have foreign key contest. news model: class news(models.model): title = models.charfield(max_length=50, null=true) description = models.textfield() time = models.timefield( default= datetime.datetime.now().time()) contest = models.foreignkey(contest) i want use admin adding , changing these models. want when user clicks on 'news' has foreign key contest id=1, shows list of news value foreign key. use {% instance in instances %} <tr class="{% cycle 'row1' 'row2' %}"> <td>{{ instance.title }}</td> <td>{{ instance.starttime }}</td> <td>{{ instance.timespan }}</td> <td>{{ instance.date }}</td> <td><a href="/adm...
Read more

android - Keyboard hides my half of edit-text and button below it even in scroll view -

i having trouble keyboard covers edit-text , half of button in scroll view. here's layout , please tell me how should resolve problem. many questions on topic none of them s working me. <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@drawable/bg" android:layout_height="match_parent"> <scrollview android:layout_width="match_parent" android:fillviewport="true" android:layout_height="match_parent"> <relativelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <linearlayout android:layout_width="match_parent" android:layout_height="w...
Read more

css - Make div keyboard-scrollable in jQuery Mobile? -

from can tell, although jquery-mobile-powered pages can contain divs overflow set scroll or auto, , these divs can scrolled one-screen bar or mouse wheel, cannot scrolled using arrow keys, page-up/page-down, or home/end. instead, official "page" div (with data-role="page") absorbs input. perhaps other divs can't acquire focus, i'm not sure. is there way around this? edit: jsfiddle of simple example: https://jsfiddle.net/qogz0shx/ <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"> </script> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"/> <style> #outer { overflow:scroll; height: 50vh; width: 50vw; } #inner { height: 500vh; width: 500vw; } ...
Read more