alternativaplatform / alternativa3d

Alternativa3D Flash GPU accelerated 3D engine

Alternativa3D

Alternativa3D is a high-tech and high-performance 3D engine for ActionScript 3 and Adobe AIR. It supports hardware acceleration for browser-based games and applications. Initially, the engine was designed to meet our own needs but we realized that it wouldn't be fair to limit the use of the technology to just one game. That is why we decided to make it an open source engine. Since our top priorities are high performance and resource efficiency, we recommend using it for games with high-resolution graphics.

We will gladly partner with ambitious professionals to develop features that will be used in large projects.

Features:

• Based on Flash Player technology
• API is analagous to API Flash
• 3ds Max compatible
• GPU acceleration (graphic cards newer than 2005)
• Support of own A3D object model format
• Resource efficiency control
• The main texture formats: JPG, PNG, ATF, GIF
• ATF format support
• Character and object animation with blending
• Sprite and sprite animation
• Materials that work with lighting, reflection and lightmaps
• Shadows from light sources
• Support of mouse events
• Support of the particle system

Links

Blog Forum

Projects using Alternativa3D

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MMO Top-Down Shooter game based on futuristic gladiator fights
  
 

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MMO RPG game - post-apocalyptic survival after a virus has transformed people into zombies.
  
 

Videos

Demos

Repository

We offer the community not only use of the engine but involvement in its further development. If you have found a bug you can notify us about it. You can use repositories, create your own branches, experiment and recommend whatever changes you think should be made. All useful changes will be employed in the engine architecture, and your contribution will be made known to the public though facebook and twitter.

• Alternativa3D - The current engine version.
• Alternativa3DUtils - Add-ins and enhancers. You don't need to know the shader programming to create utilities, so feel free to experiement.
• Alternativa3DExamples - Examples of using the engine with various features demonstrated. If we like your examples they will appear in the main repository branch.

Documentation

• Online API reference
• Download as an archive

Articles on the use of the product

• Simple aplication
• Compilation of Alternativa3D from source codes
• Alternativa 8 for Dummies Part I © redefy
• Alternativa 8 for Dummies Part II © redefy
• Alternativa 8 for Dummies Part III © redefy
• Use ResourceLoader © Davide Jones
• Simple Animation Load in 8.5 Example
• Parser3DS tutorial
• Non-linear animation
• SkyBox example
• Debug object Wireframe
• Manual Skin creation
• Dragging a 3d object © Davide Jones
• Rendering to bitmap © Davide Jones

Plugin for Blender

• Blender Alternativa Addon © Davide Jones
• Blender Alternativa Addon - Installing © Davide Jones
• Blender Alternativa Addon - Optimizing a3d export © Davide Jones
• Blender Alternativa Addon - Using LOD © Davide Jones
• Blender Alternativa Addon - Using Sprites © Davide Jones

Plugin for Autodesk 3ds Max

• Plugin for 3ds Max 2012
• Plugin for 3ds Max 2011
• Plugin for 3ds Max 2010

Literature

• Environment and Refraction
• Custom materials shaders and intersectionRay
• Example of material for creating the effect of atmosphere
• Skin
• Orbit controller
• Why can i not see the object
• Z-fighting

Our helpers

• Davide Jones
• redefy
  (All those who took part in the development and writing of posts, please contact us)

alternativa3d's Issues

Fix Twitter Account in README

Now is AltrntivaPltfrm, but actual is Alternativa3Den

Performance optimizations using object literals

Object literals are faster than the new operator

Strings, Numbers (including int and uint), and Boolean objects are usually instantiated using literal notation (var str:String = “text”). Objects and Arrays are often instantiated using the “new” operator – this is seldom necessary (only in the case of a fixed-length Array), and is slower.

var o:Object = {}; is faster than var o:Object = new Object();

and

var a:Array = []; is faster than var a:Array = new Array();

OmniLightShadow bug on ipad

См скрин тут явно какое-то говно.

проблемы с фрустумкулером

народ говорит спрайты3д не кулятся http://forum.alternativaplatform.com/posts/list/0/10238.page

Blurry Sprite3D

When we use Sprite3D we don't want to scale up the bitmapdata if it is not power of two. So, we need to have something like Image in starling.

I made changes (hardcode) to reach such behavior.
Here are some changes in BitmapTextureResource.as:

            if (resizeForGPU) {
                var wLog2Num:Number = Math.log(data.width)/Math.LN2;
                var hLog2Num:Number = Math.log(data.height)/Math.LN2;
                var wLog2:int = Math.ceil(wLog2Num);
                var hLog2:int = Math.ceil(hLog2Num);
                if (wLog2 != wLog2Num || hLog2 != hLog2Num || wLog2 > 11 || hLog2 > 11) {
                    // Resize bitmap
                    wLog2 = (wLog2 > 11) ? 11 : wLog2;
                    hLog2 = (hLog2 > 11) ? 11 : hLog2;
                    source = new BitmapData(1 << wLog2, 1 << hLog2, data.transparent, 0x0);
                    source.copyPixels(data, data.rect, new Point(0, 0));
                    scaleUV = new Rectangle(0, 0, data.width / source.width, data.height / source.height);
                }
            }

So, we copy data without resizing. source.copyPixels(data, data.rect, new Point(0, 0)); Then save scaleUV to set them in Sprite3D.as:

            geometry.setAttributeValues(VertexAttributes.POSITION, Vector.<Number>([0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0]));
            geometry.setAttributeValues(VertexAttributes.NORMAL, Vector.<Number>([0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, -1]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[0], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[1], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[2], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[3], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[4], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[5], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[6], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));
            geometry.setAttributeValues(VertexAttributes.TEXCOORDS[7], Vector.<Number>([0, 0, 0, scaleV, scaleU, scaleV, scaleU, 0]));

I don't know how to integrate it correct into the main code. So it would be great to see similar changes in the next releases.

Thanks.

Null pointer exception during publish 3ds

Hi

When I try to publish my 3ds file with textures in http://a3dplayer.com/ Iget error

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at alternativa.engine3d.loaders::ExporterA3D/exportGeometry()[C:\Develop\platform\clients\fp11\libraries\Alternativa3D\trunk\target\checkout\src\alternativa\engine3d\loaders\ExporterA3D.as:523]
at alternativa.engine3d.loaders::ExporterA3D/exportMesh()[C:\Develop\platform\clients\fp11\libraries\Alternativa3D\trunk\target\checkout\src\alternativa\engine3d\loaders\ExporterA3D.as:370]
at alternativa.engine3d.loaders::ExporterA3D/exportHierarchy()[C:\Develop\platform\clients\fp11\libraries\Alternativa3D\trunk\target\checkout\src\alternativa\engine3d\loaders\ExporterA3D.as:256]
at alternativa.engine3d.loaders::ExporterA3D/exportHierarchy()[C:\Develop\platform\clients\fp11\libraries\Alternativa3D\trunk\target\checkout\src\alternativa\engine3d\loaders\ExporterA3D.as:267]
at alternativa.engine3d.loaders::ExporterA3D/export()[C:\Develop\platform\clients\fp11\libraries\Alternativa3D\trunk\target\checkout\src\alternativa\engine3d\loaders\ExporterA3D.as:171]
at projects.editor.clients.fp11.Alternativa3DEditor.export.exportSWF.progressPhase::ExportProgressPhase/prepareModelSource()
at projects.editor.clients.fp11.Alternativa3DEditor.export.exportSWF.progressPhase::ExportProgressPhase()
at projects.editor.clients.fp11.Alternativa3DEditor.app::ExportController/exportToSWF()
at projects.editor.clients.fp11.Alternativa3DEditor.app.views.topPanel::TopPanel/__exportSWF_click()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at alternativa.gui.mouse::MouseManager/onClick()[C:\work\fb3\AlternativaGUI\target\checkout\src\alternativa\gui\mouse\MouseManager.as:990]
at alternativa.gui.mouse::MouseManager/onMouseUp()[C:\work\fb3\AlternativaGUI\target\checkout\src\alternativa\gui\mouse\MouseManager.as:1128]

Click-Target Detection on Mobile Devices

The detection does not work on Android & Apple devices.

See thread:
http://forum.alternativaplatform.com/posts/list/10004.page

Problem seems to be in view -> calculateSurfacesDepths where "red" and "green" are always 0.

Android and IOS wrong MouseEvent3D Z order

Only on Android and IOS if you have for example a box on a plane and click on the box, the mouseevent3D will always target the plane.

So the issue is concerning MouseEvent3D with overlapping object.

ATF COMPRESSED_ALPHA support

See discussion at the end of pull request #26

Context3DProfile

How to Extended Mode

lookAt methods point in wrong y direction

I have two comments about the lookAt methods (in DirectionalLight, SpotLight, Camera3D, and possibly elsewhere):

1. I think this method should be implemented in Object3D, not in multiple subclasses.
2. When deltaY is non-zero, the lookAt method produces incorrect results for me. It points down when it should point up and vice versa. If you aren't able to trivially reproduce this, let me know and I'll investigate the cause further.

Thanks!

Z ordering wrong on Android

Everything works fine on Windows. However, when I take my code to Android, the Z ordering of objects is all wrong. The following code produces these outputs:

Windows 7 64 Home Premium, Adobe AIR 3.3:http://i49.tinypic.com/20jo2kg.png - Right

Android 3.2.1 Le Pan II, Adobe AIR 3.3: http://i50.tinypic.com/1z1sgtc.png - Wrong

(Flex 4.6 SDK, AIR 3.3 SDK, Alternativa3D 8.27, FlashDevelop 4.0.4 RTM with default "AIR Mobile AS3 App" profile)

package 
{
    import alternativa.engine3d.core.Camera3D;
    import alternativa.engine3d.core.Object3D;
    import alternativa.engine3d.core.View;
    import alternativa.engine3d.lights.OmniLight;
    import alternativa.engine3d.materials.StandardMaterial;
    import alternativa.engine3d.primitives.Box;
    import alternativa.engine3d.resources.BitmapTextureResource;
    import flash.display.BitmapData;
    import flash.display.Stage3D;
    import flash.events.Event;
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;

    [SWF(width = "1024", height = "720")]

    public class Main extends Sprite 
    {
        public var
            stage3D     :Stage3D = stage.stage3Ds[0],
            scene       :Object3D = new Object3D(),
            camera      :Camera3D;

        public function Main():void 
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;

            stage3D = stage.stage3Ds[0];
            stage3D.addEventListener(Event.CONTEXT3D_CREATE, onContext3dCreate);
            stage3D.requestContext3D();
        }

        private function onContext3dCreate(event:Event):void
        {
            camera = new Camera3D(1, 10000);
            camera.view = new View(stage.stageWidth, stage.stageHeight);
            camera.view.hideLogo();
            camera.rotationX = -.5;
            camera.rotationY = -1;
            scene.addChild(camera);
            addChild(camera.view);

            var light:OmniLight = new OmniLight(0xffffff, 5000, 10000);
            scene.addChild(light);

            var normalMap:BitmapTextureResource = new BitmapTextureResource(new BitmapData(1, 1, false, 0x7f7fff));
            normalMap.upload(stage3D.context3D);

            var texture:BitmapTextureResource = new BitmapTextureResource(new BitmapData(1, 1, false, 0xff0000));
            texture.upload(stage3D.context3D);
            var material:StandardMaterial = new StandardMaterial(texture, normalMap);

            var boxSize:uint = 50;
            var boxCount:int = 10;
            for (var x:int = 0; x < boxCount; x++)
                for (var z:int = 0; z < boxCount; z++)
                {
                    var box:Box = new Box(boxSize - 5, 10, boxSize - 5);
                    box.geometry.upload(stage3D.context3D);
                    box.getSurface(0).material = material;
                    box.x = (boxSize * x) - (boxCount * boxSize);
                    box.y = 50;
                    box.z = boxSize * z;
                    scene.addChild(box);
                }

            camera.render(stage3D);
        }
    }
}

проект Alternativa3DUtils недоступен

https://github.com/AlternativaPlatform/Alternativa3DUtils 404 хотя стоит ссылка из readme

mouse voodoo in View.as causes bugs with 2 pass postprocessing

http://forum.alternativaplatform.com/posts/downloadAttach/2584.page

Why does BitmapTextureResource have to lose _texture?

This is more like forum question, but - since it's down - here goes:

            } else {
                _texture = null;
                throw new Error("Cannot upload without data");
            }

Why does it have to do that? I could understand throw, but "= null" part is mysterious 😕

ExporterA3D doesn't export materials

Оказалось, что ExporterA3D не умеет экспортировать обычный StandartMaterial в котором находится BitmapTextureResource.

private function exportMap(source:TextureResource, channel:int, dest:A3D2):int {
            if (source == null) return -1;
            var result:A3D2Map = mapsMap[source];
            if (result != null) return result.id;
            if (source is ExternalTextureResource) {
                var resource:ExternalTextureResource = source as ExternalTextureResource;
                result = new A3D2Map(channel, mapID, exportImage(resource, dest));
                if (dest.maps == null) dest.maps = new Vector.<A3D2Map>();
                dest.maps[mapID] = result;
                mapsMap[source] = result;

                return mapID++;
            }
            return -1;
        }

Почему только if (source is ExternalTextureResource) { ???????? Невероятно!
Я бы сделал пуллреквест только у вас там бинарные библиотеки.

MouseEvent3D does not work on Sprite3D::AlwaysOnTop when Sprite3D is covered by another object

var point:Sprite3D = new Sprite3D(16, 16, pMaterial);
point.mouseEnabled = true;
point.mouseChildren = true;
point.useHandCursor = true;
point.alwaysOnTop = true;

Sprite is covered by another mesh. Mouse events does not work.

No Wiki?

Could we please have a wiki to post tutorials and how-tos?

calculateBoundBox not working

updateBoundBox() in Object3D is completely empty

StandardMaterial drops fps when lights are removed/added

My initial guess was that lights array is not sorted according to light type and so program cache is ineffective. But then all my lights are omnidirectional, so it should not matter.

profile name not needed in DaeEffect

https://github.com/AlternativaPlatform/Alternativa3D/blob/master/src/alternativa/engine3d/loaders/collada/DaeEffect.as#L112

according to http://forum.alternativaplatform.com/index.php?showtopic=4526&#entry25329 it prevents loading normal maps in blender dae-s