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Several months ago I threw together an OSX HoloToy demo that used OpenCV and the iSight camera to replicate the facial recognition head tracking used in the iPhone 4/iPod touch version. This seemed like a perfect place to insert the Kinect, buy Adipex-P from canada. Adipex-P paypal,
The above video shows various scenes with the perspective controlled via the Kinect. At this point it is simply tracking a specified depth range however with motion tracking of the depth map and other techniques, Adipex-P pills, Free Adipex-P samples, this could be really special.
Links:
OpenKinect git repo: openkinect.org
A nice overview of current Kinect experiments: creativeapplications.net
iPhone 4/iPod touch head tracking: kode80.com
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Click the above example to load another tag, there are 26 tags to view and 4 different styles. Valium gel, ointment, cream, pill, spray, continuous-release, extended-release, Mouse position controls rotation.
Earlier this week I stumbled upon #000000book.com a site created as an open database of GML files, buy Valium online with no prescription. Valium in canada, GML is a new XML format used to describe graffiti tags. GML stores not only the resulting tag but the artists hand movements that created it, Valium price, coupon, Buy Valium without prescription, essentially a recording of the tag being written. Aside from providing a great source of interesting data I consider this to be an important effort in curating an often misunderstood global artform, Valium (Brand) 10mg pills.
The first step was to create an AS3 library that could parse GML files and provide an interface to the time stamped point data, delivered overnight Valium. Next day Valium, In doing this it became very apparent that not all GML files were created equal with some files having wrong parenting of nodes and others storing coords incorrectly but this is to be expected considering the GML spec is only at 0.1c.
To render the tags my aim was for a stylized pseudo 3D look, over the counter Valium. Valium in us, The points are transformed and projected with Z based on time, then rendered as a 2D textured line, Valium in uk. Valium in india, Each line segments left/right edges are outlined and the start/end edges are rotated/scaled based on neighboring point angle and Z respectively. Finally a subtle glow filter adds some contrast, order Valium from United States pharmacy. Valium in australia,
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In the example above, click and drag to reposition the light rays filter light source.
For a while now I've been wanting to experiment with volumetric lighting techniques in Papervision and the other day I came across a great article from Fabien Sanglard regarding a fake post processing approach described in Graphics Gems 3, Alprazolam tablets. Alprazolam medication, (Fabien has some excellent posts on GFX coding which I highly recommend, especially if you are an iPhone developer)
The post processing technique described is beautiful in it's simplicity and gives great results for very modest overhead, buy cheap Alprazolam. Buy Alprazolam online without a prescription, All it requires is drawing the occluders of the scene as black over a colored background then applying something similar to a radial blur emanating from the imaginary light source.
In the scene above the rendered output is scaled by 25% and drawn to a bitmap using a ColorTransform to make it black, Alprazolam from international pharmacy. Where to buy Alprazolam, This bitmap then has the light rays pixel bender filter applied, is scaled back up and blended with the scene using the regular blend mode, Alprazolam over the counter. Purchase Alprazolam online no prescription, Check my experiments repository for the code.
Code
PV3D light rays source on Google code
Links
Fabien Sanglard's article on light scattering as a post process
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In the example above, mouse X controls the cubes X position, mouse Y controls the cubes Z position and clicking switches between viewing the output and the depth buffer. Buy Retin-A online cod,
The primary purpose of a depth buffer is to enable per pixel depth checking. Before a pixel can be drawn its depth is compared with the current depth at that point in the depth buffer, purchase Retin-A online. Buying Retin-A online over the counter, If the new depth is greater than the current depth then the new pixel is obviously occluded and thus shouldn't be drawn. Doing this prevents depth sorting issues and allows objects to intersect without the need for dynamic tessellation, cod online Retin-A.
With my 11bit depth buffer technique in PV3D the primary goal was enabling post processing effects that are only achievable with a depth buffer however at the back of my mind I wondered if depth testing was in some way feasible, Generic Retin-A 0.05% Cream. Where can i order Retin-A without prescription, Initially I contemplated lowering the precision to 8bit and using BitmapData methods to create per object masks but this would involve a large number of bitmap operations.
Using custom PixelBender blend modes seemed like the perfect solution offering a similar setup minus all the bitmap operations while still keeping 11bit precision, order Retin-A online overnight delivery no prescription. Buy cheap Retin-A, The first blend mode does the depth testing for each depth buffer layer resulting in a clipped depth buffer. Then a second blend mode copies over the texture based on a red channel encoded object ID, Retin-A gel, ointment, cream, pill, spray, continuous-release, extended-release. Saturday delivery Retin-A,
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In the example above, click and drag to draw smoke. Lormetazepam in australia, Mouse movement without clicking pushes smoke around.
Fluid dynamics is the study of fluids in motion, Lormetazepam in uk. Lormetazepam tablets, Simulating the interactions of gas and liquid in motion is a highly processor intensive task requiring many iterations of thousands of calculations.
It is impossible to research fluid dynamics without hearing the name Jos Stam, the principle scientist at Autodesk (and winner of Academy Award for his work on subdivision surfaces), purchase Lormetazepam online. Lormetazepam in india,
The example above is an implementation of Jos Stams Real-Time Fluid Dynamics for Games paper. It utilizes an 80x80 grid and is pure AS3 (no Alchemy or Pixel Bender), Generic Lormetazepam 15mg Pills. To achieve a decent framerate at that grid size certain liberties had to be taken with the algorithm, Lormetazepam paypal. Buy generic Lormetazepam, For example by assuming both diffuse and viscosity are 0 many of the calculations can be simplified.
The multiple iterations per frame step were also removed as with this type of soft smoke/cloud effect they are not necessary for a satisfactory result On top of that I have optimized as much as possible, order Lormetazepam from mexican pharmacy, Rx free Lormetazepam, for example I was able to remove a good 80% of multiplication's from the original paper.
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Code
Fluid dynamics smoke source on Google code
Links
Real-Time Fluid Dynamics for Games paper
Eugene Zatepyakin's AS3 fluid experiment,
Alchemy version
Pierluigi Pesenti's AS3 fluid smoke experiment
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Clicking the example above will switch between viewing output and the depth buffer. Cod online Librium,
Using the same Pixel Bender kernel as my previous depth of field experiment it is possible to achieve depth based fog. Since the kernel controls alpha based on depth we just have to fill the filter target with the desired fog color, saturday delivery Librium. Buy Librium no prescription, To make it a little more visually interesting I have added some animated perlin noise as well.
The trick to creating the depth buffer was rather simple, Librium for sale. First a texture is created with each pixel set to it's Y value, then when rendering, each vertex has it's V texture coordinate set based on it's Z position, Generic Librium 10 mg Pills. Next day Librium, From here a Pixel Bender kernel can decode the depth... and then the fun begins, Librium tablets. Buy no prescription Librium online,
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Code
Depth buffer fog source on Google code
Links
Depth buffer depth of field experiment
Depth buffer ambient occlusion experiment
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In the example above, use the controls to set the depth that the DOF starts and ends at and the strength of the blur. Setting the focus depth to greater than the blur depth will cause the distance to be in focus with the foreground out of focus, next day Phentermine. Phentermine pills, Click and drag to reposition the camera.
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With my latest PV3D depth buffer implementation providing 11bit precision at the pixel level the past DOF limitations are no longer an issue, purchase Phentermine online. Real brand Phentermine online, Since the effect no longer requires high tessellation there is also a decent performance boost.
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In the example above, the SSAO layers brightness, contrast, alpha, blur and blend mode can be adjusted to achieve different effects. Included are 7 presets as examples of what can be achieved with just these parameters, Dalmane trusted pharmacy reviews. Dalmane in india, Click and drag to reposition the camera.
Screen Space Ambient Occlusion is a post processing technique for approximating the shading achieved by ambient occlusion, Dalmane in usa. Where can i find Dalmane online, Rather than using scene information such as geometry and lights to calculate shading, SSAO requires only a 2D depth buffer, buy no prescription Dalmane online. For each pixel in the depth buffer multiple samples are taken from nearby and used to approximate the level of occlusion, this value can then be used to shade the output pixel, Generic Dalmane 15mg Pills. Sale Dalmane,
The example scene above is made entirely of Papervision cubes and spheres and contains no lights and no shader materials. Each object renders it's bitmap texture as expected but also renders it's depth to the depth buffer, online buying Dalmane hcl. Buy Dalmane from canada, The depth buffer is filtered using my SSAO Pixel Bender kernel then blurred and brightness/contrast adjusted using standard Flash filters.
For a purely post processed effect the results are remarkably good adding a lot of depth to a flat scene, Dalmane medication. Generic Dalmane 15mg Pills, However there is still lots of room for improvement. Dalmane tablets, The halo around objects could be minimized with a custom blur filter. The self-occluding surface issue is the result of no normal information and I have a few potential solutions for that, fast shipping Dalmane. Dalmane from international pharmacy, Still, not bad for phase 2, Dalmane to buy. Online buy Dalmane without a prescription,
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This is an early preview of my Screen Space Ambient Occlusion implementation in Papervision. To achieve this I am using a custom material that renders the scene as an 11bit depth buffer, buying Valium online over the counter. Valium from canadian pharmacy, I am then using Pixel Bender to interpret the depth buffer and filter using my SSAO implementation. More examples, buy no prescription Valium online, Valium san diego, code and a better optimized PB kernel to come next week.
Links:
Screen Space Ambient Occlusion Wikipedia page
Some great examples of different approaches to Screen Space Ambient Occlusion at meshula.net
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Before the advent of per pixel shaders, developers were creating faux-3D textures for things such as grass and fur by giving the target object several layers. If the layers are close enough together and the object is far enough away from the camera a texel will have the illusion of being a 3D strand, Provigil paypal. Provigil in india,
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Click and drag the above example to rotate the camera.
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Modern hardware can now produce accurate bloom effects using HDR imagery however similar results have been achieved for years on lesser hardware, order Alprazolam online overnight delivery no prescription. Alprazolam in japan,
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Links
By adjusting the properties of the bloom filter many effects can be achieved ranging from subtle glows to full light trails, Alprazolam buy. Alprazolam san diego, Get the source from my experiments repository on google code and try it out for yourself!
Bloom filter source on google code
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