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C# ShadingState.traceDiffusePhoton方法代码示例

本文整理汇总了C#中ShadingState.traceDiffusePhoton方法的典型用法代码示例。如果您正苦于以下问题:C# ShadingState.traceDiffusePhoton方法的具体用法?C# ShadingState.traceDiffusePhoton怎么用?C# ShadingState.traceDiffusePhoton使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在ShadingState的用法示例。


在下文中一共展示了ShadingState.traceDiffusePhoton方法的4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);
     }
 }
开发者ID:rzel,项目名称:sunflowsharp,代码行数:27,代码来源:DiffuseShader.cs

示例2: scatterPhoton

 public void scatterPhoton(ShadingState state, Color power)
 {
     // make sure we are on the right side of the material
     state.faceforward();
     Color d = getDiffuse(state);
     state.storePhoton(state.getRay().getDirection(), power, d);
     float avgD = d.getAverage();
     float avgS = spec.getAverage();
     double rnd = state.getRandom(0, 0, 1);
     if (rnd < avgD)
     {
         // photon is scattered diffusely
         power.mul(d).mul(1.0f / avgD);
         OrthoNormalBasis onb = state.getBasis();
         double u = 2 * Math.PI * rnd / avgD;
         double v = state.getRandom(0, 1, 1);
         float s = (float)Math.Sqrt(v);
         float s1 = (float)Math.Sqrt(1.0f - 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 < avgD + avgS)
     {
         // photon is scattered specularly
         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 / avgS);
         OrthoNormalBasis onb = state.getBasis();
         double u = 2 * Math.PI * (rnd - avgD) / avgS;
         double v = state.getRandom(0, 1, 1);
         float s = (float)Math.Pow(v, 1 / (this.power + 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);
     }
 }
开发者ID:rzel,项目名称:sunflowsharp,代码行数:42,代码来源:PhongShader.cs

示例3: 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);
         }
     }
 }
开发者ID:,项目名称:,代码行数:58,代码来源:

示例4: scatterPhoton

        public void scatterPhoton(ShadingState state, Color power)
        {
            // make sure we are on the right side of the material
            state.faceforward();
            Color d = getDiffuse(state);
            state.storePhoton(state.getRay().getDirection(), power, d);
            float avgD = d.getAverage();
            float avgS = rhoS.getAverage();
            double rnd = state.getRandom(0, 0, 1);
            if (rnd < avgD)
            {
                // photon is scattered diffusely
                power.mul(d).mul(1.0f / avgD);
                OrthoNormalBasis onb = state.getBasis();
                double u = 2 * Math.PI * rnd / avgD;
                double v = state.getRandom(0, 1, 1);
                float s = (float)Math.Sqrt(v);
                float s1 = (float)Math.Sqrt(1.0f - 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 < avgD + avgS)
            {
                // photon is scattered specularly
                power.mul(rhoS).mul(1 / avgS);
                OrthoNormalBasis basis = state.getBasis();
                Vector3 inv = state.getRay().getDirection().negate(new Vector3());
                double r1 = rnd / avgS;
                double r2 = state.getRandom(0, 1, 1);

                float alphaRatio = alphaY / alphaX;
                float phi = 0;
                if (r1 < 0.25)
                {
                    double val = 4 * r1;
                    phi = (float)Math.Atan(alphaRatio * Math.Tan(Math.PI / 2 * val));
                }
                else if (r1 < 0.5)
                {
                    double val = 1 - 4 * (0.5 - r1);
                    phi = (float)Math.Atan(alphaRatio * Math.Tan(Math.PI / 2 * val));
                    phi = (float)Math.PI - phi;
                }
                else if (r1 < 0.75)
                {
                    double val = 4 * (r1 - 0.5);
                    phi = (float)Math.Atan(alphaRatio * Math.Tan(Math.PI / 2 * val));
                    phi += (float)Math.PI;
                }
                else
                {
                    double val = 1 - 4 * (1 - r1);
                    phi = (float)Math.Atan(alphaRatio * Math.Tan(Math.PI / 2 * val));
                    phi = 2 * (float)Math.PI - phi;
                }

                float cosPhi = (float)Math.Cos(phi);
                float sinPhi = (float)Math.Sin(phi);

                float denom = (cosPhi * cosPhi) / (alphaX * alphaX) + (sinPhi * sinPhi) / (alphaY * alphaY);
                float theta = (float)Math.Atan(Math.Sqrt(-Math.Log(1 - r2) / denom));

                float sinTheta = (float)Math.Sin(theta);
                float cosTheta = (float)Math.Cos(theta);

                Vector3 h = new Vector3();
                h.x = sinTheta * cosPhi;
                h.y = sinTheta * sinPhi;
                h.z = cosTheta;
                basis.transform(h);

                Vector3 o = new Vector3();
                float ih = Vector3.dot(h, inv);
                o.x = 2 * ih * h.x - inv.x;
                o.y = 2 * ih * h.y - inv.y;
                o.z = 2 * ih * h.z - inv.z;

                Ray r = new Ray(state.getPoint(), o);
                state.traceReflectionPhoton(r, power);
            }
        }
开发者ID:rzel,项目名称:sunflowsharp,代码行数:82,代码来源:AnisotropicWardShader.cs


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