Well, it doesn't light properly if the object has been rotated.
Here's how I'm transforming the vertices (after I getting it from the
vertex list of a Trimesh) to match what you see in the world:
******START OF CODE
dim q,q2 as Quaternion, Scale, mYaw, mPitch as double
dim Pnt as vector3D
Pnt.MultiplyBy Scale //scale it to its current scale
//rotate the vertex <--- The rotation
code starts here
q=new Quaternion
q2=new Quaternion
q2.SetRotateAboutAxis 0,1,0,mYaw//yaw it this amount
q=q2.Times(q)
q2.SetRotateAboutAxis 1,0,0,mPitch//then pitch it upward
q=q2.Times(q)
Pnt.Copy q.Transform(Pnt)
//-- <---
The rotation code ends here
Pnt.Add Position //translate the point to world coordinates
******END OF CODE
To get to its proper rotation, I yaw the object first then pitch it
by the same mYaw and mPitch values. mYaw and mPitch are in radians.
I'm trying to do the same to the vertices, but it is not working
correctly.
What am I doing wrong?
Please post some screenshots when you've got something to show -
I'm curious to see the results!
Sure. The default light color is the ambient color * ambient light.
Each light that hits a vertex is added onto the current vertex color.
The lighting is a bit different because of the specular light
(shininess) on the original models. After rendering, I turned on
NullShading so that RB/Quesa's dynamic lights do not affect it. I
didn't have my own scenes yet to test with so I hope Jeff and Joe
don't mind me using theirs (from Renegades).
Before:
http://www.miensoftware.com/darkawakening/vertexlight/screen1.jpg
After:
http://www.miensoftware.com/darkawakening/vertexlight/screen2.jpg
http://www.miensoftware.com/darkawakening/vertexlight/screen3.jpg
Before:
http://www.miensoftware.com/darkawakening/vertexlight/screen4.jpg
After:
http://www.miensoftware.com/darkawakening/vertexlight/screen5.jpg
http://www.miensoftware.com/darkawakening/vertexlight/screen6.jpg
The next step is to expand on this and create per pixel lighting
by ray-tracing the entire scene and generating a mesh-based
lightmap, but I'll leave this for another day if I decide to do it...
Not sure what you mean by a "mesh-based" lightmap (a highly
tessellated version of the original mesh?)
A mesh generated by the rays hitting a surface. Or, instead, attach
the new points onto the mesh that the ray hits so that the shadows
are sharper and more accurate.
Either way it's pretty much impossible to render per-pixel
lightmaps through Quesa, as it only allows one texture per triangle
(and one set of UV's for that matter).
That's what I mean. Since Quesa cannot support multiple UVs, the 2nd
texture must be on a separate mesh that is slightly shifted over the
original. Since we know where the ray hits, a mesh can be generated
over the original surface with a light map texture.
This already sounds complex, but I'll leave it for another day to
tackle if I really feel it is needed.
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