public Color lookup(ShadingState state, IShader shader)
{
if (state.getNormal() == null)
{
return(null);
}
// search further
for (Sample s = first; s != null; s = s.next)
{
if (s.i != state.getInstance())
{
continue;
}
if (s.s != shader)
{
continue;
}
if (state.getRay().dot(s.dx, s.dy, s.dz) < 0.999f)
{
continue;
}
if (state.getNormal().dot(s.nx, s.ny, s.nz) < 0.99f)
{
continue;
}
// we have a match
hits++;
return(s.c);
}
misses++;
return(null);
}
private Color lookupShadingCache(ShadingState state, IShader shader)
{
lock (lockObj)
{
if (state.getNormal() == null)
{
return(null);
}
cacheLookups++;
int cx = (int)(state.getRasterX() * shadingCacheResolution);
int cy = (int)(state.getRasterY() * shadingCacheResolution);
int hash = hashfunc(cx, cy);
CacheEntry e = _shadingCache[hash & (_shadingCache.Length - 1)];
if (e == null)
{
cacheEmptyEntryMisses++;
return(null);
}
// entry maps to correct pixel
if (e.cx == cx && e.cy == cy)
{
// search further
for (Sample s = e.first; s != null; s = s.next)
{
if (s.i != state.getInstance())
{
continue;
}
// if (s.prim != state.getPrimitiveID())
// continue;
if (s.s != shader)
{
continue;
}
if (state.getNormal().dot(s.nx, s.ny, s.nz) < 0.95f)
{
continue;
}
// we have a match
cacheHits++;
return(s.c);
}
}
else
{
cacheWrongEntryMisses++;
}
return(null);
}
}
/**
* Get the radiance seen through a particular pixel
*
* @param istate intersection state for ray tracing
* @param rx pixel x coordinate
* @param ry pixel y coordinate
* @param lensU DOF sampling variable
* @param lensV DOF sampling variable
* @param time motion blur sampling variable
* @param instance QMC instance seed
* @return a shading state for the intersected primitive, or
* <code>null</code> if nothing is seen through the specifieFd
* point
*/
public ShadingState getRadiance(IntersectionState istate, float rx, float ry, double lensU, double lensV, double time, int instance)
{
if (bakingPrimitives == null)
{
Ray r = camera.getRay(rx, ry, imageWidth, imageHeight, lensU, lensV, time);
return(r != null?lightServer.getRadiance(rx, ry, instance, r, istate) : null);
}
else
{
Ray r = new Ray(rx / imageWidth, ry / imageHeight, -1, 0, 0, 1);
traceBake(r, istate);
if (!istate.hit())
{
return(null);
}
ShadingState state = ShadingState.createState(istate, rx, ry, r, instance, lightServer);
bakingPrimitives.prepareShadingState(state);
if (bakingViewDependent)
{
state.setRay(camera.getRay(state.getPoint()));
}
else
{
Point3 p = state.getPoint();
Vector3 n = state.getNormal();
// create a ray coming from directly above the point being
// shaded
Ray incoming = new Ray(p.x + n.x, p.y + n.y, p.z + n.z, -n.x, -n.y, -n.z);
incoming.setMax(1);
state.setRay(incoming);
}
lightServer.shadeBakeResult(state);
return(state);
}
}
private void addShadingCache(ShadingState state, IShader shader, Color c)
{
lock (lockObj)
{
// don't cache samples with null normals
if (state.getNormal() == null)
{
return;
}
cacheEntryAdditions++;
int cx = (int)(state.getRasterX() * shadingCacheResolution);
int cy = (int)(state.getRasterY() * shadingCacheResolution);
int h = hashfunc(cx, cy) & (_shadingCache.Length - 1);
CacheEntry e = _shadingCache[h];
// new entry ?
if (e == null)
{
e = _shadingCache[h] = new CacheEntry();
}
Sample s = new Sample();
s.i = state.getInstance();
// s.prim = state.getPrimitiveID();
s.s = shader;
s.c = c;
s.nx = state.getNormal().x;
s.ny = state.getNormal().y;
s.nz = state.getNormal().z;
if (e.cx == cx && e.cy == cy)
{
// same pixel - just add to the front of the list
s.next = e.first;
e.first = s;
}
else
{
// different pixel - new list
e.cx = cx;
e.cy = cy;
s.next = null;
e.first = s;
}
}
}
public void add(ShadingState state, IShader shader, Color c)
{
if (state.getNormal() == null)
{
return;
}
depth++;
Sample s = new Sample();
s.i = state.getInstance();
s.s = shader;
s.c = c;
s.dx = state.getRay().dx;
s.dy = state.getRay().dy;
s.dz = state.getRay().dz;
s.nx = state.getNormal().x;
s.ny = state.getNormal().y;
s.nz = state.getNormal().z;
s.next = first;
first = s;
}
/**
* Prepare the shading state for shader invocation. This also runs the
* currently attached surface modifier.
*
* @param state shading state to be prepared
*/
public void prepareShadingState(ShadingState state)
{
geometry.prepareShadingState(state);
if (state.getNormal() != null && state.getGeoNormal() != null)
{
state.correctShadingNormal();
}
// run modifier if it was provided
if (state.getModifier() != null)
{
state.getModifier().modify(state);
}
}