本文整理汇总了C#中ShadingState类的典型用法代码示例。如果您正苦于以下问题：C# ShadingState类的具体用法？C# ShadingState怎么用？C# ShadingState使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
ShadingState类属于命名空间，在下文中一共展示了ShadingState类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: scatterPhoton
public void scatterPhoton(ShadingState state, Color power)
{
Color diffuse;
// make sure we are on the right side of the material
if (Vector3.dot(state.getNormal(), state.getRay().getDirection()) > 0.0)
{
state.getNormal().negate();
state.getGeoNormal().negate();
}
diffuse = getDiffuse(state);
state.storePhoton(state.getRay().getDirection(), power, diffuse);
float avg = diffuse.getAverage();
double rnd = state.getRandom(0, 0, 1);
if (rnd < avg)
{
// photon is scattered
power.mul(diffuse).mul(1.0f / avg);
OrthoNormalBasis onb = state.getBasis();
double u = 2 * Math.PI * rnd / avg;
double v = state.getRandom(0, 1, 1);
float s = (float)Math.Sqrt(v);
float s1 = (float)Math.Sqrt(1.0 - v);
Vector3 w = new Vector3((float)Math.Cos(u) * s, (float)Math.Sin(u) * s, s1);
w = onb.transform(w, new Vector3());
state.traceDiffusePhoton(new Ray(state.getPoint(), w), power);
}
}示例2: prepareShadingState
public void prepareShadingState(ShadingState state)
{
state.init();
state.getRay().getPoint(state.getPoint());
Instance parent = state.getInstance();
Point3 localPoint = parent.transformWorldToObject(state.getPoint());
state.getNormal().set(localPoint.x, localPoint.y, localPoint.z);
state.getNormal().normalize();
float phi = (float)Math.Atan2(state.getNormal().y, state.getNormal().x);
if (phi < 0)
phi += (float)(2 * Math.PI);
float theta = (float)Math.Acos(state.getNormal().z);
state.getUV().y = theta / (float)Math.PI;
state.getUV().x = phi / (float)(2 * Math.PI);
Vector3 v = new Vector3();
v.x = -2 * (float)Math.PI * state.getNormal().y;
v.y = 2 * (float)Math.PI * state.getNormal().x;
v.z = 0;
state.setShader(parent.getShader(0));
state.setModifier(parent.getModifier(0));
// into world space
Vector3 worldNormal = parent.transformNormalObjectToWorld(state.getNormal());
v = parent.transformVectorObjectToWorld(v);
state.getNormal().set(worldNormal);
state.getNormal().normalize();
state.getGeoNormal().set(state.getNormal());
// compute basis in world space
state.setBasis(OrthoNormalBasis.makeFromWV(state.getNormal(), v));
}示例3: getRadiance
public Color getRadiance(ShadingState state)
{
// don't use these - gather lights for sphere of directions
// gather lights
state.initLightSamples();
state.initCausticSamples();
Vector3 v = state.getRay().getDirection();
v.negate();
Vector3 h = new Vector3();
Vector3 t = state.getBasis().transform(new Vector3(0, 1, 0));
Color diff = Color.black();
Color spec = Color.black();
foreach (LightSample ls in state)
{
Vector3 l = ls.getShadowRay().getDirection();
float dotTL = Vector3.dot(t, l);
float sinTL = (float)Math.Sqrt(1 - dotTL * dotTL);
// float dotVL = Vector3.dot(v, l);
diff.madd(sinTL, ls.getDiffuseRadiance());
Vector3.add(v, l, h);
h.normalize();
float dotTH = Vector3.dot(t, h);
float sinTH = (float)Math.Sqrt(1 - dotTH * dotTH);
float s = (float)Math.Pow(sinTH, 10.0f);
spec.madd(s, ls.getSpecularRadiance());
}
Color c = Color.add(diff, spec, new Color());
// transparency
return Color.blend(c, state.traceTransparency(), state.getV(), new Color());
}示例4: getSamples
public void getSamples(ShadingState state)
{
if (Vector3.dot(dir, state.getGeoNormal()) < 0 && Vector3.dot(dir, state.getNormal()) < 0)
{
// project point onto source plane
float x = state.getPoint().x - src.x;
float y = state.getPoint().y - src.y;
float z = state.getPoint().z - src.z;
float t = ((x * dir.x) + (y * dir.y) + (z * dir.z));
if (t >= 0.0)
{
x -= (t * dir.x);
y -= (t * dir.y);
z -= (t * dir.z);
if (((x * x) + (y * y) + (z * z)) <= r2)
{
Point3 p = new Point3();
p.x = src.x + x;
p.y = src.y + y;
p.z = src.z + z;
LightSample dest = new LightSample();
dest.setShadowRay(new Ray(state.getPoint(), p));
dest.setRadiance(radiance, radiance);
dest.traceShadow(state);
state.addSample(dest);
}
}
}
}示例5: getSamples
public void getSamples(ShadingState state)
{
if (samples == null)
{
int n = state.getDiffuseDepth() > 0 ? 1 : numSamples;
for (int i = 0; i < n; i++)
{
// random offset on unit square, we use the infinite version of
// getRandom because the light sampling is adaptive
double randX = state.getRandom(i, 0, n);
double randY = state.getRandom(i, 1, n);
int x = 0;
while (randX >= colHistogram[x] && x < colHistogram.Length - 1)
x++;
float[] rowHistogram = imageHistogram[x];
int y = 0;
while (randY >= rowHistogram[y] && y < rowHistogram.Length - 1)
y++;
// sample from (x, y)
float u = (float)((x == 0) ? (randX / colHistogram[0]) : ((randX - colHistogram[x - 1]) / (colHistogram[x] - colHistogram[x - 1])));
float v = (float)((y == 0) ? (randY / rowHistogram[0]) : ((randY - rowHistogram[y - 1]) / (rowHistogram[y] - rowHistogram[y - 1])));
float px = ((x == 0) ? colHistogram[0] : (colHistogram[x] - colHistogram[x - 1]));
float py = ((y == 0) ? rowHistogram[0] : (rowHistogram[y] - rowHistogram[y - 1]));
float su = (x + u) / colHistogram.Length;
float sv = (y + v) / rowHistogram.Length;
float invP = (float)Math.Sin(sv * Math.PI) * jacobian / (n * px * py);
Vector3 dir = getDirection(su, sv);
basis.transform(dir);
if (Vector3.dot(dir, state.getGeoNormal()) > 0)
{
LightSample dest = new LightSample();
dest.setShadowRay(new Ray(state.getPoint(), dir));
dest.getShadowRay().setMax(float.MaxValue);
Color radiance = texture.getPixel(su, sv);
dest.setRadiance(radiance, radiance);
dest.getDiffuseRadiance().mul(invP);
dest.getSpecularRadiance().mul(invP);
dest.traceShadow(state);
state.addSample(dest);
}
}
}
else
{
for (int i = 0; i < numSamples; i++)
{
if (Vector3.dot(samples[i], state.getGeoNormal()) > 0 && Vector3.dot(samples[i], state.getNormal()) > 0)
{
LightSample dest = new LightSample();
dest.setShadowRay(new Ray(state.getPoint(), samples[i]));
dest.getShadowRay().setMax(float.MaxValue);
dest.setRadiance(colors[i], colors[i]);
dest.traceShadow(state);
state.addSample(dest);
}
}
}
}示例6: GetRadiance
public Color GetRadiance(ShadingState state)
{
// make sure we are on the right side of the material
state.faceforward();
// direct lighting
state.initLightSamples();
state.initCausticSamples();
Color d = getDiffuse(state);
Color lr = state.diffuse(d);
if (!state.includeSpecular)
return lr;
if (glossyness == 0)
{
float cos = state.getCosND();
float dn = 2 * cos;
Vector3 refDir = new Vector3();
refDir.x = (dn * state.getNormal().x) + state.getRay().getDirection().x;
refDir.y = (dn * state.getNormal().y) + state.getRay().getDirection().y;
refDir.z = (dn * state.getNormal().z) + state.getRay().getDirection().z;
Ray refRay = new Ray(state.getPoint(), refDir);
// compute Fresnel term
cos = 1 - cos;
float cos2 = cos * cos;
float cos5 = cos2 * cos2 * cos;
Color spec = getSpecular(state);
Color ret = Color.white();
ret.sub(spec);
ret.mul(cos5);
ret.add(spec);
return lr.add(ret.mul(state.traceReflection(refRay, 0)));
}
else
return lr.add(state.specularPhong(getSpecular(state), 2 / glossyness, numSamples));
}示例7: getIrradiance
public Color getIrradiance(ShadingState state, Color diffuseReflectance)
{
if (samples <= 0)
return Color.BLACK;
// compute new sample
Color irr = Color.black();
OrthoNormalBasis onb = state.getBasis();
Vector3 w = new Vector3();
int n = state.getDiffuseDepth() == 0 ? samples : 1;
for (int i = 0; i < n; i++)
{
float xi = (float)state.getRandom(i, 0, n);
float xj = (float)state.getRandom(i, 1, n);
float phi = (float)(xi * 2 * Math.PI);
float cosPhi = (float)Math.Cos(phi);
float sinPhi = (float)Math.Sin(phi);
float sinTheta = (float)Math.Sqrt(xj);
float cosTheta = (float)Math.Sqrt(1.0f - xj);
w.x = cosPhi * sinTheta;
w.y = sinPhi * sinTheta;
w.z = cosTheta;
onb.transform(w);
ShadingState temp = state.traceFinalGather(new Ray(state.getPoint(), w), i);
if (temp != null)
{
temp.getInstance().prepareShadingState(temp);
if (temp.getShader() != null)
irr.add(temp.getShader().getRadiance(temp));
}
}
irr.mul((float)Math.PI / n);
return irr;
}示例8: getRadiance
public Color getRadiance(ShadingState state)
{
Point3[] p = new Point3[3];
if (!state.getTrianglePoints(p))
return getFillColor(state);
// transform points into camera space
Point3 center = state.getPoint();
Matrix4 w2c = state.getWorldToCamera();
center = w2c.transformP(center);
for (int i = 0; i < 3; i++)
p[i] = w2c.transformP(state.getInstance().transformObjectToWorld(p[i]));
float cn = 1.0f / (float)Math.Sqrt(center.x * center.x + center.y * center.y + center.z * center.z);
for (int i = 0, i2 = 2; i < 3; i2 = i, i++)
{
// compute orthogonal projection of the shading point onto each
// triangle edge as in:
// http://mathworld.wolfram.com/Point-LineDistance3-Dimensional.html
float t = (center.x - p[i].x) * (p[i2].x - p[i].x);
t += (center.y - p[i].y) * (p[i2].y - p[i].y);
t += (center.z - p[i].z) * (p[i2].z - p[i].z);
t /= p[i].distanceToSquared(p[i2]);
float projx = (1 - t) * p[i].x + t * p[i2].x;
float projy = (1 - t) * p[i].y + t * p[i2].y;
float projz = (1 - t) * p[i].z + t * p[i2].z;
float n = 1.0f / (float)Math.Sqrt(projx * projx + projy * projy + projz * projz);
// check angular width
float dot = projx * center.x + projy * center.y + projz * center.z;
if (dot * n * cn >= cosWidth)
return getLineColor(state);
}
return getFillColor(state);
}示例9: getRadiance
public Color getRadiance(ShadingState state)
{
if (!state.includeLights)
return Color.BLACK;
state.faceforward();
// emit constant radiance
return state.isBehind() ? Color.BLACK : radiance;
}示例10: ScatterPhoton
public void ScatterPhoton(ShadingState state, Color power)
{
Color diffuse, specular;
// make sure we are on the right side of the material
state.faceforward();
diffuse = getDiffuse(state);
specular = getSpecular(state);
state.storePhoton(state.getRay().getDirection(), power, diffuse);
float d = diffuse.getAverage();
float r = specular.getAverage();
double rnd = state.getRandom(0, 0, 1);
if (rnd < d)
{
// photon is scattered
power.mul(diffuse).mul(1.0f / d);
OrthoNormalBasis onb = state.getBasis();
double u = 2 * Math.PI * rnd / d;
double v = state.getRandom(0, 1, 1);
float s = (float)Math.Sqrt(v);
float s1 = (float)Math.Sqrt(1.0 - v);
Vector3 w = new Vector3((float)Math.Cos(u) * s, (float)Math.Sin(u) * s, s1);
w = onb.transform(w, new Vector3());
state.traceDiffusePhoton(new Ray(state.getPoint(), w), power);
}
else if (rnd < d + r)
{
if (glossyness == 0)
{
float cos = -Vector3.dot(state.getNormal(), state.getRay().getDirection());
power.mul(diffuse).mul(1.0f / d);
// photon is reflected
float dn = 2 * cos;
Vector3 dir = new Vector3();
dir.x = (dn * state.getNormal().x) + state.getRay().getDirection().x;
dir.y = (dn * state.getNormal().y) + state.getRay().getDirection().y;
dir.z = (dn * state.getNormal().z) + state.getRay().getDirection().z;
state.traceReflectionPhoton(new Ray(state.getPoint(), dir), power);
}
else
{
float dn = 2.0f * state.getCosND();
// reflected direction
Vector3 refDir = new Vector3();
refDir.x = (dn * state.getNormal().x) + state.getRay().dx;
refDir.y = (dn * state.getNormal().y) + state.getRay().dy;
refDir.z = (dn * state.getNormal().z) + state.getRay().dz;
power.mul(spec).mul(1.0f / r);
OrthoNormalBasis onb = state.getBasis();
double u = 2 * Math.PI * (rnd - r) / r;
double v = state.getRandom(0, 1, 1);
float s = (float)Math.Pow(v, 1 / ((1.0f / glossyness) + 1));
float s1 = (float)Math.Sqrt(1 - s * s);
Vector3 w = new Vector3((float)Math.Cos(u) * s1, (float)Math.Sin(u) * s1, s);
w = onb.transform(w, new Vector3());
state.traceReflectionPhoton(new Ray(state.getPoint(), w), power);
}
}
}示例11: getSamples
public void getSamples(ShadingState state)
{
if (getNumSamples() <= 0)
return;
Vector3 wc = Point3.sub(center, state.getPoint(), new Vector3());
float l2 = wc.LengthSquared();
if (l2 <= r2)
return; // inside the sphere?
// top of the sphere as viewed from the current shading point
float topX = wc.x + state.getNormal().x * radius;
float topY = wc.y + state.getNormal().y * radius;
float topZ = wc.z + state.getNormal().z * radius;
if (state.getNormal().dot(topX, topY, topZ) <= 0)
return; // top of the sphere is below the horizon
float cosThetaMax = (float)Math.Sqrt(Math.Max(0, 1 - r2 / Vector3.dot(wc, wc)));
OrthoNormalBasis basis = OrthoNormalBasis.makeFromW(wc);
int samples = state.getDiffuseDepth() > 0 ? 1 : getNumSamples();
float scale = (float)(2 * Math.PI * (1 - cosThetaMax));
Color c = Color.mul(scale / samples, radiance);
for (int i = 0; i < samples; i++)
{
// random offset on unit square
double randX = state.getRandom(i, 0, samples);
double randY = state.getRandom(i, 1, samples);
// cone sampling
double cosTheta = (1 - randX) * cosThetaMax + randX;
double sinTheta = Math.Sqrt(1 - cosTheta * cosTheta);
double phi = randY * 2 * Math.PI;
Vector3 dir = new Vector3((float)(Math.Cos(phi) * sinTheta), (float)(Math.Sin(phi) * sinTheta), (float)cosTheta);
basis.transform(dir);
// check that the direction of the sample is the same as the
// normal
float cosNx = Vector3.dot(dir, state.getNormal());
if (cosNx <= 0)
continue;
float ocx = state.getPoint().x - center.x;
float ocy = state.getPoint().y - center.y;
float ocz = state.getPoint().z - center.z;
float qa = Vector3.dot(dir, dir);
float qb = 2 * ((dir.x * ocx) + (dir.y * ocy) + (dir.z * ocz));
float qc = ((ocx * ocx) + (ocy * ocy) + (ocz * ocz)) - r2;
double[] t = Solvers.solveQuadric(qa, qb, qc);
if (t == null)
continue;
LightSample dest = new LightSample();
// compute shadow ray to the sampled point
dest.setShadowRay(new Ray(state.getPoint(), dir));
// FIXME: arbitrary bias, should handle as in other places
dest.getShadowRay().setMax((float)t[0] - 1e-3f);
// prepare sample
dest.setRadiance(c, c);
dest.traceShadow(state);
state.addSample(dest);
}
}示例12: getRadiance
public Color getRadiance(ShadingState state)
{
// make sure we are on the right side of the material
state.faceforward();
// setup lighting
state.initLightSamples();
state.initCausticSamples();
return state.diffuse(getDiffuse(state));
}示例13: getRadiance
public Color getRadiance(ShadingState state)
{
// make sure we are on the right side of the material
state.faceforward();
// setup lighting
state.initLightSamples();
state.initCausticSamples();
// execute shader
return state.diffuse(getDiffuse(state)).add(state.specularPhong(spec, power, numRays));
}示例14: getIrradiance
public Color getIrradiance(ShadingState state, Color diffuseReflectance)
{
float cosTheta = Vector3.dot(up, state.getNormal());
float sin2 = (1 - cosTheta * cosTheta);
float sine = sin2 > 0 ? (float)Math.Sqrt(sin2) * 0.5f : 0;
if (cosTheta > 0)
return Color.blend(sky, ground, sine);
else
return Color.blend(ground, sky, sine);
}示例15: getRadiance
public Color getRadiance(ShadingState state)
{
state.faceforward();
state.initCausticSamples();
// integrate a diffuse function
Color lr = Color.black();
foreach (LightSample sample in state)
lr.madd(sample.dot(state.getNormal()), sample.getDiffuseRadiance());
return lr.mul(1.0f / (float)Math.PI);
}