Examples with Ray org.sunflow.core.Ray used on opensource projects

Example 1 with Ray

use of org.sunflow.core.Ray in project joons-renderer by joonhyublee.

the class DirectionalSpotlight method 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);
            }
        }
    }
}

Example 2 with Ray

use of org.sunflow.core.Ray in project joons-renderer by joonhyublee.

the class SunSkyLight method getSamples.

public void getSamples(ShadingState state) {
    if (Vector3.dot(sunDirWorld, state.getGeoNormal()) > 0 && Vector3.dot(sunDirWorld, state.getNormal()) > 0) {
        LightSample dest = new LightSample();
        dest.setShadowRay(new Ray(state.getPoint(), sunDirWorld));
        dest.getShadowRay().setMax(Float.MAX_VALUE);
        dest.setRadiance(sunColor, sunColor);
        dest.traceShadow(state);
        state.addSample(dest);
    }
    int n = state.getDiffuseDepth() > 0 ? 1 : numSkySamples;
    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 localDir = getDirection(su, sv);
        Vector3 dir = basis.transform(localDir, new Vector3());
        if (Vector3.dot(dir, state.getGeoNormal()) > 0 && Vector3.dot(dir, state.getNormal()) > 0) {
            LightSample dest = new LightSample();
            dest.setShadowRay(new Ray(state.getPoint(), dir));
            dest.getShadowRay().setMax(Float.MAX_VALUE);
            Color radiance = getSkyRGB(localDir);
            dest.setRadiance(radiance, radiance);
            dest.getDiffuseRadiance().mul(invP);
            dest.getSpecularRadiance().mul(invP);
            dest.traceShadow(state);
            state.addSample(dest);
        }
    }
}

Example 3 with Ray

use of org.sunflow.core.Ray in project joons-renderer by joonhyublee.

the class Hair method prepareShadingState.

@Override
public void prepareShadingState(ShadingState state) {
    state.init();
    Instance i = state.getInstance();
    state.getRay().getPoint(state.getPoint());
    Ray r = state.getRay();
    Shader s = i.getShader(0);
    state.setShader(s != null ? s : this);
    int primID = state.getPrimitiveID();
    int hair = primID / numSegments;
    int line = primID % numSegments;
    int vRoot = hair * 3 * (numSegments + 1);
    int v0 = vRoot + line * 3;
    // tangent vector
    Vector3 v = getTangent(line, v0, state.getV());
    v = state.transformVectorObjectToWorld(v);
    state.setBasis(OrthoNormalBasis.makeFromWV(v, new Vector3(-r.dx, -r.dy, -r.dz)));
    state.getBasis().swapVW();
    // normal
    state.getNormal().set(0, 0, 1);
    state.getBasis().transform(state.getNormal());
    state.getGeoNormal().set(state.getNormal());
    state.getUV().set(0, (line + state.getV()) / numSegments);
}

Example 4 with Ray

use of org.sunflow.core.Ray in project joons-renderer by joonhyublee.

the class AmbientOcclusionGIEngine method getIrradiance.

@Override
public Color getIrradiance(ShadingState state, Color diffuseReflectance) {
    OrthoNormalBasis onb = state.getBasis();
    Vector3 w = new Vector3();
    Color result = Color.black();
    for (int i = 0; i < samples; i++) {
        float xi = (float) state.getRandom(i, 0, samples);
        float xj = (float) state.getRandom(i, 1, samples);
        float phi = (float) (2 * Math.PI * xi);
        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);
        Ray r = new Ray(state.getPoint(), w);
        r.setMax(maxDist);
        result.add(Color.blend(bright, dark, state.traceShadow(r)));
    }
    return result.mul((float) Math.PI / samples);
}

Example 5 with Ray

use of org.sunflow.core.Ray in project joons-renderer by joonhyublee.

the class ImageBasedLight method 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.MAX_VALUE);
                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 {
        if (state.getDiffuseDepth() > 0) {
            for (int i = 0; i < numLowSamples; i++) {
                if (Vector3.dot(lowSamples[i], state.getGeoNormal()) > 0 && Vector3.dot(lowSamples[i], state.getNormal()) > 0) {
                    LightSample dest = new LightSample();
                    dest.setShadowRay(new Ray(state.getPoint(), lowSamples[i]));
                    dest.getShadowRay().setMax(Float.MAX_VALUE);
                    dest.setRadiance(lowColors[i], lowColors[i]);
                    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.MAX_VALUE);
                    dest.setRadiance(colors[i], colors[i]);
                    dest.traceShadow(state);
                    state.addSample(dest);
                }
            }
        }
    }
}