Deep Beta

Presentation – checked

Lukasz Iwanski — Thu, 05 Apr 2012 12:01:49 +0000

Presentation Poster

Presentation done, no prize for the best poster, oh well..
Two more weeks..

Power of well balanced octree

Lukasz Iwanski — Sat, 31 Mar 2012 20:26:48 +0000

300 FPS when moves - Insane!

Small memory leak was driving me crazy; Debugging process was taking ages.. bored, frustrated and tired decided to play about with octrees depth and minimal/maximal number of elements in leaf.. Amazed by 300FPS discovered the stupid mistake of creating VBO each time the leaf is regenerated. Instant win; fix of memory leak and 10 times greater performance.

Who said that the mistakes are stupid?

Only Visible Faces, Fog, Selected Box

Lukasz Iwanski — Tue, 13 Mar 2012 16:35:54 +0000

1233560 cubes visible avg. FPS: 144.

Simple optimisation great performance boost! – Skip ALL the non-visible faces!

Progressive Rendering + visibility testing in a fly

Lukasz Iwanski — Tue, 06 Mar 2012 02:53:09 +0000

Progressive Grid of 256x256x256

Apparently I couldn’t resist. Last optimisation implemented.

Now seriously, report!

Octree + simplex noise

Lukasz Iwanski — Mon, 05 Mar 2012 00:09:31 +0000

simplex noise in action

Since week all development stopped and now I am struggling with report. Just finished draft of first chapter.. it’s terrible.

Octree in Place

Lukasz Iwanski — Sun, 19 Feb 2012 16:46:39 +0000

Step forward

Last two nights were all about Octree, however this morning last bug has been hunted down.
Now I need to write a structure of report, good luck me

Oh and some metrics:

Editable Grid.. yay!

Lukasz Iwanski — Mon, 09 Jan 2012 21:29:55 +0000

Editable grid 16x16x16

Finally, my grid is editable now.

We can edit or remove current blocks – adding new ones will be introduced after optimisation stage.
Current version supports 4 standard blocks (Blue, Green, Yellow, Brown) and 1 point light (Blue with circle in the middle).

In this iteration of “boxel engine” regenerateBuffers method updates nearest block that collides with ray fired from camera POV within worldGrid 3 dimensional table, after that, buffers that contain shadow and light powers are recalculated, at the end two openGL methods are called (for each buffer):

1 2	glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer[sectorID]); glBufferSubData(GL_ARRAY_BUFFER, 0, frame_vertices[sectorID].size()*sizeof(glm::vec3), &frame_vertices[sectorID][0][0]);

first, buffer is bind, and then values are updated, starting from index 0 and then updating whole buffer.
Optimisation, that I will be introducing soon, is updating only changed values that will reduce data size.
That has to be send to graphics card.

Note:

Grid 64 recalculation takes a while :S

Metrics will be added soon.

100 will be about: Shadows and some point Light(s)

Lukasz Iwanski — Sat, 07 Jan 2012 17:22:46 +0000

Shadows added - calculated on GPU but still works fine!

Shadow value for each cube is stored in separate grid, values are sent to shader and then output is altered. It all depends on value.
The value is calculated based on number of obstacles on the way between light and current cube.
Below you can find some metrics:

Metrics for shadow added.

Earlier I have introduced point light to engine, there is example of one point light – shown below.

Point lights introduced.. performance drops.. but that's good.

Below 510 point lights on 64x64x64 cubes grid.

Point lights on 64 grid - 36 FPS.. pretty Ok.

And its metrics..

512 Point Lights took 2 Friends Episodes to load in

Metrics for grid of 32x32x32 cubes, below:

Wait.. What?!?.. straight Line?

Why the results for point lights are almost the same?
All the calculations are precomputed on CPU so we are dealing with fixed buffer of light values – which is fair enough, however I need to optimise loading process so it will allow to add lights in real time.

Next step, editable terrain..

Directional Light performance impact on the scene

Lukasz Iwanski — Thu, 22 Dec 2011 03:34:10 +0000

Directional Lighted "boxel" scene

Very simple calculation of directional light had noticeable impact on the performance, table below shows it:

Performance impact for different number of boxes.

and yeah, SW:TOR is pretty Ok but nothing can win with “coding hunger”.

Finally.. textures with metrics

Lukasz Iwanski — Tue, 20 Dec 2011 12:16:05 +0000

Textured 262144 cubes

This evening code hunger got me badly.. tomorrow, big launch of SW:TOR and lets be honest about it.. I will do no more honours project related work over this Christmas.

Anyway, in order to evaluate the software I have collected FPS and Memory Usage of the application.

Metrics for above project

Base metrics are like this:

Base Metrics

Funny enough, in texture integration progress I have made some optimisation, frame rate went up by slight cost of memory.. I am happy, I can deal with that.