RTShader.cc

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#include <gra/shader/RTShader.h>

using namespace gra;

Color3f* RTShader::illuminatePoint(const Vector3& location,
                                   const Vector3& normal,
                                   const Vector3& eyeDir,
                                   float          eyeDist,
                                   double*        pNV,
                                   const Matrix4* pTrMat)
{
    static PointEnv env;
    
    if (!_pReflectionModel) return NULL;
    
    env.viewerDir.set(eyeDir);
    env.intersection.set(location);
    env.normal.set(normal);
    env.normalOrientation = PointEnv::OUTWARDS_NORMAL;//we suppose fixed normal

    if (pTrMat) {
        Matrix3 rotMat;
        pTrMat->get(rotMat);
        pTrMat->transform(env.intersection);
        rotMat.transform(env.normal);
        rotMat.transform(env.viewerDir);
    }

    env.distance = eyeDist;
    
    if (pNV) {
        env.nd = -(*pNV);
        env.mask = (ENV_HAVE_N_DOT_D|
                    ENV_HAVE_INTERSECTION|
                    ENV_HAVE_NORMAL|
                    ENV_HAVE_VIEWER_DIR|
                    ENV_HAVE_DISTANCE);
    } else
        env.mask = (ENV_HAVE_INTERSECTION|
                    ENV_HAVE_NORMAL|
                    ENV_HAVE_VIEWER_DIR|
                    ENV_HAVE_DISTANCE);
    
    if (_pShape) {
        env.pVisitableObj = _pShape;
        env.mask |= ENV_HAVE_ASOC_PRIMITIVE;
    } 

    return _pReflectionModel->illuminatePoint(env);
}

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