Examples with Color org.sunflow.image.Color used on opensource projects

Example 46 with Color

use of org.sunflow.image.Color in project joons-renderer by joonhyublee.

the class IrradianceCacheGIEngine method getIrradiance.

@Override
public Color getIrradiance(ShadingState state, Color diffuseReflectance) {
    if (samples <= 0) {
        return Color.BLACK;
    }
    if (state.getDiffuseDepth() > 0) {
        // do simple path tracing for additional bounces (single ray)
        float xi = (float) state.getRandom(0, 0, 1);
        float xj = (float) state.getRandom(0, 1, 1);
        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);
        Vector3 w = new Vector3();
        w.x = cosPhi * sinTheta;
        w.y = sinPhi * sinTheta;
        w.z = cosTheta;
        OrthoNormalBasis onb = state.getBasis();
        onb.transform(w);
        Ray r = new Ray(state.getPoint(), w);
        ShadingState temp = state.traceFinalGather(r, 0);
        return temp != null ? getGlobalRadiance(temp).copy().mul((float) Math.PI) : Color.BLACK;
    }
    rwl.readLock().lock();
    Color irr;
    try {
        irr = getIrradiance(state.getPoint(), state.getNormal());
    } finally {
        rwl.readLock().unlock();
    }
    if (irr == null) {
        // compute new sample
        irr = Color.black();
        OrthoNormalBasis onb = state.getBasis();
        float invR = 0;
        float minR = Float.POSITIVE_INFINITY;
        Vector3 w = new Vector3();
        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) (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);
            Ray r = new Ray(state.getPoint(), w);
            ShadingState temp = state.traceFinalGather(r, i);
            if (temp != null) {
                minR = Math.min(r.getMax(), minR);
                invR += 1.0f / r.getMax();
                temp.getInstance().prepareShadingState(temp);
                irr.add(getGlobalRadiance(temp));
            }
        }
        irr.mul((float) Math.PI / samples);
        invR = samples / invR;
        rwl.writeLock().lock();
        try {
            insert(state.getPoint(), state.getNormal(), invR, irr);
        } finally {
            rwl.writeLock().unlock();
        }
    }
    return irr;
}

Example 47 with Color

use of org.sunflow.image.Color in project joons-renderer by joonhyublee.

the class LightSample method traceShadow.

/**
 * Trace the shadow ray, attenuating the sample's color by the opacity of
 * intersected objects.
 *
 * @param state shading state representing the point to be shaded
 */
public final void traceShadow(ShadingState state) {
    Color opacity = state.traceShadow(shadowRay);
    Color.blend(ldiff, Color.BLACK, opacity, ldiff);
    Color.blend(lspec, Color.BLACK, opacity, lspec);
}

Example 48 with Color

use of org.sunflow.image.Color in project joons-renderer by joonhyublee.

the class Texture method getPixel.

/**
 * Gets the color at location (x,y) in the texture. The lookup is performed
 * using the fractional component of the coordinates, treating the texture
 * as a unit square tiled in both directions. Bicubic filtering is performed
 * on the four nearest pixels to the lookup point.
 *
 * @param x x coordinate into the texture
 * @param y y coordinate into the texture
 * @return filtered color at location (x,y)
 */
public Color getPixel(float x, float y) {
    Bitmap bitmapc = getBitmap();
    x = MathUtils.frac(x);
    y = MathUtils.frac(y);
    float dx = x * (bitmapc.getWidth() - 1);
    float dy = y * (bitmapc.getHeight() - 1);
    int ix0 = (int) dx;
    int iy0 = (int) dy;
    int ix1 = (ix0 + 1) % bitmapc.getWidth();
    int iy1 = (iy0 + 1) % bitmapc.getHeight();
    float u = dx - ix0;
    float v = dy - iy0;
    u = u * u * (3.0f - (2.0f * u));
    v = v * v * (3.0f - (2.0f * v));
    float k00 = (1.0f - u) * (1.0f - v);
    Color c00 = bitmapc.readColor(ix0, iy0);
    float k01 = (1.0f - u) * v;
    Color c01 = bitmapc.readColor(ix0, iy1);
    float k10 = u * (1.0f - v);
    Color c10 = bitmapc.readColor(ix1, iy0);
    float k11 = u * v;
    Color c11 = bitmapc.readColor(ix1, iy1);
    Color c = Color.mul(k00, c00);
    c.madd(k01, c01);
    c.madd(k10, c10);
    c.madd(k11, c11);
    return c;
}