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/*************************************************************************
* Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "dimensionxx.hpp"
namespace Dimension
{
// Construct an intersection object
Intersection::Intersection(const Line& ray, double t, const Texture& texture)
: m_intersection(new dmnsn_intersection*(dmnsn_new_intersection())),
m_ray(ray), m_texture(texture)
{
dmnsn()->t = t;
}
// Wrap an existing intersection - don't release() one of these
Intersection::Intersection(dmnsn_intersection *intersection)
: m_intersection(new dmnsn_intersection*(intersection)),
m_ray(intersection->ray),
m_texture(const_cast<dmnsn_texture*>(intersection->texture))
{ }
// Delete an intersection
Intersection::~Intersection() {
if (m_intersection && m_intersection.unique()) {
dmnsn_delete_intersection(dmnsn());
}
}
dmnsn_intersection*
Intersection::dmnsn()
{
if (!m_intersection) {
throw Dimension_Error("Attempt to access released intersection.");
}
return *m_intersection;
}
const dmnsn_intersection*
Intersection::dmnsn() const
{
if (!m_intersection) {
throw Dimension_Error("Attempt to access released intersection.");
}
return *m_intersection;
}
dmnsn_intersection*
Intersection::release()
{
if (!m_intersection) {
throw Dimension_Error("Attempt to release previously released"
" intersection.");
}
if (!m_intersection.unique()) {
throw Dimension_Error("Attempt to release non-unique intersection.");
}
dmnsn_intersection* intersection = dmnsn();
m_intersection.reset();
return intersection;
}
// Manual constructor
Object::Object(dmnsn_object* object)
: m_object(new dmnsn_object*(object))
{ }
// Virtual Object destructor
Object::~Object()
{
if (unique()) {
dmnsn_delete_object(dmnsn());
}
}
// Get the transformation matrix
Matrix
Object::trans()
{
return Matrix(dmnsn()->trans);
}
// Set the transformation matrix
void
Object::trans(const Matrix& trans)
{
dmnsn()->trans = trans.dmnsn();
}
// Intersection list for the line l
Intersection
Object::intersection(const Line& l)
{
return Intersection((*dmnsn()->intersection_fn)(dmnsn(), l.dmnsn()));
}
// Whether the point `point' is inside the object
bool
Object::inside(const Vector& point)
{
return (*dmnsn()->inside_fn)(dmnsn(), point.dmnsn());
}
// Return the wrapped object
dmnsn_object*
Object::dmnsn()
{
if (!m_object) {
throw Dimension_Error("Attempt to access NULL object.");
}
return *m_object;
}
Object*
Object::copy() const
{
return new Object(*this);
}
// Return a const version of the wrapped canvas
const dmnsn_object*
Object::dmnsn() const
{
if (!m_object) {
throw Dimension_Error("Attempt to access NULL object.");
}
return *m_object;
}
// Protected default no-op constructor
Object::Object()
: m_object()
{ }
// Protected copy constructor
Object::Object(const Object& object)
: m_object(object.m_object)
{ }
// Is m_object unique?
bool
Object::unique() const
{
return m_object && m_object.unique();
}
// Set the wrapped dmnsn_object*
void
Object::dmnsn(dmnsn_object* object)
{
m_object.reset(new dmnsn_object*(object));
}
// Custom object callbacks
namespace
{
dmnsn_intersection *
intersection_fn(const dmnsn_object *object, dmnsn_line line)
{
Custom_Object* cobject = reinterpret_cast<Custom_Object*>(object->ptr);
return cobject->intersection(Line(line)).release();
}
int
inside_fn(const dmnsn_object *object, dmnsn_vector point)
{
Custom_Object* cobject = reinterpret_cast<Custom_Object*>(object->ptr);
return cobject->inside(Vector(point));
}
}
// Initialize a new object, using member functions as callbacks
Custom_Object::Custom_Object()
: Object(dmnsn_new_object())
{
dmnsn()->ptr = this;
dmnsn()->intersection_fn = &intersection_fn;
dmnsn()->inside_fn = &inside_fn;
}
// Delete the object
Custom_Object::~Custom_Object()
{
if (unique()) {
dmnsn_delete_object(dmnsn());
}
}
}
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