Away3D Forum One sided plane

Fossor, Newbie
Posted: 12 September 2012 03:19 PM Total Posts: 21

Simple question:
How do I make one sided textured plane?
I tried to set TextureMaterial bothSides to false, in this example:

https://github.com/away3d/away3d-examples-fp11/blob/master/src/Basic_View.as

but it does nothing.

P.S. If I set doubleSided = true in PlaneGeometry I get this error:

RangeError: Error #3669: Bad input size.
at flash.display3D::VertexBuffer3D/uploadFromVector()
at away3d.core.base::SubGeometry/getUVBuffer()
at away3d.core.base::SubMesh/getUVBuffer()
at away3d.materials.passes::DefaultScreenPass/render()
at away3d.materials::MaterialBase/renderPass()
at away3d.core.render::DefaultRenderer/drawRenderables()
at away3d.core.render::DefaultRenderer/draw()
at away3d.core.render::RendererBase/executeRender()
at away3d.core.render::DefaultRenderer/executeRender()
at away3d.core.render::RendererBase/render()
at away3d.containers::View3D/render()
at Basic_View/_onEnterFrame()

John Wilson, Member
Posted: 13 September 2012 06:48 AM Total Posts: 62 [ # 1 ]

Is the bitmap you use for the texture the correct size? It must be “power of 2 and not exceeding 2048”. So 256 x 256 is fine, but 320 x 240 would not be.

Fossor, Newbie
Posted: 13 September 2012 07:49 AM Total Posts: 21 [ # 2 ]

It is 512x512 - all from the example, nothing changed

John Wilson, Member
Posted: 13 September 2012 09:36 AM Total Posts: 62 [ # 3 ]

That’s odd. By default a plane will have bothSides set to false, but I tried the following in Basic_View.as and it worked with no problem:

_plane = new Mesh(new PlaneGeometry(700, 700), new TextureMaterial(Cast.bitmapTexture(FloorDiffuse)));
   _plane.material.bothSides = true;
   _view.scene.addChild(_plane); 

Fossor, Newbie
Posted: 13 September 2012 11:19 AM Total Posts: 21 [ # 4 ]

Thanx for the reply, John.
But I need it set to false, so I don’t see the other side when rotated on X axis in the example.

John Wilson, Member
Posted: 13 September 2012 11:31 AM Total Posts: 62 [ # 5 ]

I wonder if you are using the latest GitHub versions of the Away3D and/or the Away3D examples.

If I set the botthSides property to false:

plane = new Mesh(new PlaneGeometry(700, 700), new TextureMaterial(Cast.bitmapTexture(FloorDiffuse)));
_plane.material.bothSides = false;
_view.scene.addChild(_plane); 

Then add align to _onEnterFrame:

[quote]private function _onEnterFrame(e:Event):void
{
 _plane.rotationY += 1;
 _plane.rotationX += 1;
   
 _view.render();
}[/quote] 

. . . everything is fine. The back of the plane becomes invisible when it has rotated far enough in the X axis.

Fossor, Newbie
Posted: 13 September 2012 04:15 PM Total Posts: 21 [ # 6 ]

John, sorry for being stupid and wasting your time.
I actually added some more code to that example, which is responsible for the plane to be two sided:

var geometry:PlaneGeometry = new PlaneGeometry(700, 350, 15, 15, true);
var indices:Vector.<uint> = geometry.subGeometries[0].indexData.slice();
var sil:uint = indices.length;
for (var i:int = 0; i < sil; i += 3){
    indices.push(indices[i + 2], indices[i + 1], indices[i]);
}
geometry.subGeometries[0].updateIndexData(indices); 

And then:

_plane = new Mesh(geometry, new TextureMaterial(Cast.bitmapTexture(FloorDiffuse)) );
_plane.material.bothSides = false
_view.scene.addChild(_plane); 

I need it for the Bend modifier from another library
Any thoughts?

Edit: Never mind, the code is not needed.

One sided plane Software: Away3D 4.x

Fossor, Newbie Posted: 12 September 2012 03:19 PM Total Posts: 21 Simple question: How do I make one sided textured plane? I tried to set TextureMaterial bothSides to false, in this example: https://github.com/away3d/away3d-examples-fp11/blob/master/src/Basic_View.as but it does nothing. P.S. If I set doubleSided = true in PlaneGeometry I get this error: RangeError: Error #3669: Bad input size. at flash.display3D::VertexBuffer3D/uploadFromVector() at away3d.core.base::SubGeometry/getUVBuffer() at away3d.core.base::SubMesh/getUVBuffer() at away3d.materials.passes::DefaultScreenPass/render() at away3d.materials::MaterialBase/renderPass() at away3d.core.render::DefaultRenderer/drawRenderables() at away3d.core.render::DefaultRenderer/draw() at away3d.core.render::RendererBase/executeRender() at away3d.core.render::DefaultRenderer/executeRender() at away3d.core.render::RendererBase/render() at away3d.containers::View3D/render() at Basic_View/_onEnterFrame()
John Wilson, Member Posted: 13 September 2012 06:48 AM Total Posts: 62 [ # 1 ] Is the bitmap you use for the texture the correct size? It must be “power of 2 and not exceeding 2048”. So 256 x 256 is fine, but 320 x 240 would not be.
Fossor, Newbie Posted: 13 September 2012 07:49 AM Total Posts: 21 [ # 2 ] It is 512x512 - all from the example, nothing changed
John Wilson, Member Posted: 13 September 2012 09:36 AM Total Posts: 62 [ # 3 ] That’s odd. By default a plane will have bothSides set to false, but I tried the following in Basic_View.as and it worked with no problem: `_plane = new Mesh(new PlaneGeometry(700, 700), new TextureMaterial(Cast.bitmapTexture(FloorDiffuse))); _plane.material.bothSides = true; _view.scene.addChild(_plane);`
Fossor, Newbie Posted: 13 September 2012 11:19 AM Total Posts: 21 [ # 4 ] Thanx for the reply, John. But I need it set to false, so I don’t see the other side when rotated on X axis in the example.
John Wilson, Member Posted: 13 September 2012 11:31 AM Total Posts: 62 [ # 5 ] I wonder if you are using the latest GitHub versions of the Away3D and/or the Away3D examples. If I set the botthSides property to false: `plane = new Mesh(new PlaneGeometry(700, 700), new TextureMaterial(Cast.bitmapTexture(FloorDiffuse))); _plane.material.bothSides = false; _view.scene.addChild(_plane);` Then add align to _onEnterFrame: `[quote]private function _onEnterFrame(e:Event):void { _plane.rotationY += 1; _plane.rotationX += 1; _view.render(); }[/quote]` . . . everything is fine. The back of the plane becomes invisible when it has rotated far enough in the X axis.
Fossor, Newbie Posted: 13 September 2012 04:15 PM Total Posts: 21 [ # 6 ] John, sorry for being stupid and wasting your time. I actually added some more code to that example, which is responsible for the plane to be two sided: `var geometry:PlaneGeometry = new PlaneGeometry(700, 350, 15, 15, true); var indices:Vector.<uint> = geometry.subGeometries[0].indexData.slice(); var sil:uint = indices.length; for (var i:int = 0; i < sil; i += 3){ indices.push(indices[i + 2], indices[i + 1], indices[i]); } geometry.subGeometries[0].updateIndexData(indices);` And then: `_plane = new Mesh(geometry, new TextureMaterial(Cast.bitmapTexture(FloorDiffuse)) ); _plane.material.bothSides = false _view.scene.addChild(_plane);` I need it for the Bend modifier from another library Any thoughts? Edit: Never mind, the code is not needed.

One sided plane

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