shader_sds34.h

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// Copyright 1986, 2015 NVIDIA ARC GmbH. All rights reserved.
// Created:     9.10.08
// Module:      api
// Purpose:     mental ray C++ shader interface extensions



#ifndef SHADER_SDS34_H
#define SHADER_SDS34_H

namespace mi {
namespace shader_v3 {


class Subdivision34 {
  public:

    enum Space_type {POS, TEXTURE, MOTION};

    virtual miUint get_no_spaces() const = 0;

    virtual miUint get_dimension(miUint space) const = 0;

    virtual Space_type get_space_type(miUint space) const = 0;

    virtual miUint get_no_vectors(miUint space) const = 0;

    virtual const miScalar * get_vector(
            miUint      space,
            miUint      which) const = 0;       // vector

    virtual miUint get_no_triangles() const = 0;

    virtual miUint get_no_quads() const = 0;

    struct Face {
            const miUint *      m_vertices;     // ret 3 or 4 indices
            miTag               m_material;     // face material
    };

    virtual const Face get_triangle(
            miUint      space,
            miUint      which) const = 0;       // triangle

    virtual const Face get_quad(
            miUint      space,
            miUint      which) const = 0;       // quad

    virtual bool get_triangle_derivatives(
            miUint      face,                   // triangle
            miUint      which,                  // vertex 0-2
            miVector    derivs[2]) = 0;         // result du dv vectors

    virtual bool get_quad_derivatives(
            miUint      face,                   // quad
            miUint      which,                  // vertex 0-3
            miVector    derivs[2]) = 0;         // result du dv vectors
};

class Access_subdivision34 {
  public:
    Access_subdivision34(
        miTag tag);

    ~Access_subdivision34();

    Subdivision34 * operator->() const;

  private:
    Access_subdivision34(const Access_subdivision34&);
    Access_subdivision34 & operator=(const Access_subdivision34&);
    mi::shader_v3::Interface *  m_iface;
    Subdivision34 *             m_sds34;
    const miTag                 m_tag;
};

typedef Access_subdivision34 Subdivision34_access;

inline Access_subdivision34::Access_subdivision34(
    miTag       tag)
  : m_iface(mi_get_shader_interface()),
    m_sds34(m_iface->accessSubdivision34(tag)),
    m_tag(tag)
{
}

inline Access_subdivision34::~Access_subdivision34()
{
    if (m_sds34 != 0)
        m_iface->releaseSubdivision34(m_sds34);
    m_iface->release();
}

inline Subdivision34 * Access_subdivision34::operator->() const
{
    return m_sds34;
}

}}

#endif //SHADER_SDS34_H