[Bf-committers] [Bf-Committers] [GSoC] Project P-BVH enhanced vertex painting

[Jacob Merrill]

here is the mouse over magic to get the correct projection to cast the ray

https://github.com/jesterKing/blender/blob/master/blender/release/scripts/templates_py/operator_modal_view3d_raycast.py

Note* this is not the BVH flavored ray - it's just a example of the math to
cast the ray youll need to cast inside the BVHTree
instead *

On Tue, Mar 15, 2016 at 10:25 PM, Jacob Merrill <blueprintrandom1 at gmail.com>
wrote:

> https://www.youtube.com/watch?v=K-MLpEmVgT8
>
> I build the tree on init -> then I use a hitpoint provided by the game
> engine physics, but I think you will want to use the camera projection and
> the mouse x,y to build the raycast, from there you can get all units in a
> radius, you can then get the distance from the hitpoint to do the color
> based on a multiplier
>
> https://www.youtube.com/watch?v=K-MLpEmVgT8
>
>
> On Tue, Mar 15, 2016 at 10:20 PM, Jacob Merrill <
> blueprintrandom1 at gmail.com> wrote:
>
>> I have used bvh accelerated raycast via Python to do fx in game in the
>> game engine, and I have also used kdtree,
>>
>> It's fairly simple, and a great idea, would it be in Python, or C etc? If
>> it is python I can help with that.
>> On Mar 15, 2016 10:16 PM, "Nathan Vollmer" <bitinat2 at isu.edu> wrote:
>>
>>> Hi everyone!
>>>
>>> My name's Nate Vollmer, and I'm a student at Idaho State University
>>> interested in computer graphics. (One of my projects last semester:
>>> http://www2.cose.isu.edu/~bitinat2/RayTracer/)
>>>
>>> I've written a draft for Blender's GSoC realizing the BVH vertex/weight
>>> suggested idea, and was wondering if I could get some feedback/tips on my
>>> proposal. Vertex painting is a very important feature for character
>>> riggers, and I'd like to make it as convenient and efficient as possible.
>>>
>>> I appreciate all the help!
>>> -NateVB
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>>
>