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// K-3D
// Copyright (c) 1995-2007, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Timothy M. Shead (tshead@k-3d.com)
*/
#include <k3d-i18n-config.h>
#include <k3d-platform-config.h>
#include <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/mesh_painter_gl.h>
#include <k3dsdk/nurbs_patch.h>
#include <k3dsdk/painter_render_state_gl.h>
#include <k3dsdk/painter_selection_state_gl.h>
#include <k3dsdk/selection.h>
#include <boost/scoped_ptr.hpp>
#if defined K3D_API_DARWIN
#if K3D_OSX_MAJOR_VERSION == 10 & K3D_OSX_MINOR_VERSION > 4 // OSX >= 10.5
#define GLU_NURBS_CALLBACK(callback) (GLvoid(*)())callback
#else // OSX < 10.5
#define GLU_NURBS_CALLBACK(callback) (GLvoid(*)(...))callback
#endif
#elif defined K3D_API_WIN32
#define GLU_NURBS_CALLBACK(callback) (_GLUfuncptr)callback
#else
#define GLU_NURBS_CALLBACK(callback) (void(*)())callback
#endif // !K3D_API_DARWIN
namespace module
{
namespace opengl
{
namespace painters
{
static void on_nurbs_error(GLenum ErrorCode)
{
k3d::log() << error << "NURBS patch error: " << gluErrorString(ErrorCode) << std::endl;
}
/////////////////////////////////////////////////////////////////////////////
// nurbs_patch_painter
class nurbs_patch_painter :
public k3d::gl::mesh_painter
{
typedef k3d::gl::mesh_painter base;
public:
nurbs_patch_painter(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document),
nurbs_renderer(gluNewNurbsRenderer())
{
// Important! We load our own matrices for efficiency (saves round-trips to the server) and to prevent problems with selection
gluNurbsProperty(nurbs_renderer, GLU_AUTO_LOAD_MATRIX, GL_FALSE);
gluNurbsProperty(nurbs_renderer, GLU_CULLING, GL_TRUE);
gluNurbsProperty(nurbs_renderer, GLU_DISPLAY_MODE, GLU_FILL);
gluNurbsProperty(nurbs_renderer, GLU_SAMPLING_TOLERANCE, 50);
gluNurbsCallback(nurbs_renderer, GLU_ERROR, GLU_NURBS_CALLBACK(on_nurbs_error));
}
~nurbs_patch_painter()
{
if(nurbs_renderer)
gluDeleteNurbsRenderer(nurbs_renderer);
}
void on_paint_mesh(const k3d::mesh& Mesh, const k3d::gl::painter_render_state& RenderState, k3d::iproperty::changed_signal_t& ChangedSignal)
{
for(k3d::mesh::primitives_t::const_iterator primitive = Mesh.primitives.begin(); primitive != Mesh.primitives.end(); ++primitive)
{
boost::scoped_ptr<k3d::nurbs_patch::const_primitive> nurbs(k3d::nurbs_patch::validate(Mesh, **primitive));
if(!nurbs)
continue;
const k3d::mesh::points_t& points = *Mesh.points;
k3d::gl::store_attributes attributes;
glEnable(GL_LIGHTING);
glEnable(GL_AUTO_NORMAL);
glDisable(GL_CULL_FACE);
GLfloat gl_modelview_matrix[16];
glGetFloatv(GL_MODELVIEW_MATRIX, gl_modelview_matrix);
gluLoadSamplingMatrices(nurbs_renderer, gl_modelview_matrix, RenderState.gl_projection_matrix, RenderState.gl_viewport);
const k3d::color color = k3d::color(0.8, 0.8, 0.8);
const k3d::color selected_color = RenderState.show_component_selection ? k3d::color(1, 0, 0) : color;
const k3d::uint_t patch_begin = 0;
const k3d::uint_t patch_end = patch_begin + nurbs->patch_first_points.size();
for(k3d::uint_t patch = patch_begin; patch != patch_end; ++patch)
{
const k3d::uint_t patch_u_point_count = nurbs->patch_u_point_counts[patch];
const k3d::uint_t patch_v_point_count = nurbs->patch_v_point_counts[patch];
const k3d::uint_t patch_point_begin = nurbs->patch_first_points[patch];
const k3d::uint_t patch_point_end = patch_point_begin + (patch_u_point_count * patch_v_point_count);
const k3d::uint_t patch_u_order = nurbs->patch_u_orders[patch];
const k3d::uint_t patch_v_order = nurbs->patch_v_orders[patch];
const k3d::uint_t patch_u_first_knot = nurbs->patch_u_first_knots[patch];
const k3d::uint_t patch_v_first_knot = nurbs->patch_v_first_knots[patch];
k3d::gl::material(GL_FRONT_AND_BACK, GL_DIFFUSE, nurbs->patch_selections[patch] ? selected_color : color);
std::vector<GLfloat> gl_u_knot_vector(&nurbs->patch_u_knots[patch_u_first_knot], &nurbs->patch_u_knots[patch_u_first_knot + patch_u_point_count + patch_u_order]);
std::vector<GLfloat> gl_v_knot_vector(&nurbs->patch_v_knots[patch_v_first_knot], &nurbs->patch_v_knots[patch_v_first_knot + patch_v_point_count + patch_v_order]);
const GLint gl_u_stride = 4;
const GLint gl_v_stride = gl_u_stride * patch_u_point_count;
std::vector<GLfloat> gl_control_points;
gl_control_points.reserve(4 * patch_u_point_count * patch_v_point_count);
for(k3d::uint_t patch_point = patch_point_begin; patch_point != patch_point_end; ++patch_point)
{
const double patch_point_weight = nurbs->patch_point_weights[patch_point];
const k3d::point3 weighted_patch_point = patch_point_weight * points[nurbs->patch_points[patch_point]];
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[0]));
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[1]));
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[2]));
gl_control_points.push_back(static_cast<GLfloat>(patch_point_weight));
}
gluBeginSurface(nurbs_renderer);
gluNurbsSurface(nurbs_renderer, gl_u_knot_vector.size(), &gl_u_knot_vector[0], gl_v_knot_vector.size(), &gl_v_knot_vector[0], gl_u_stride, gl_v_stride, &gl_control_points[0], patch_u_order, patch_v_order, GL_MAP2_VERTEX_4);
if(nurbs->patch_trim_loop_counts[patch])
{
k3d::uint_t loops_start = nurbs->patch_first_trim_loops[patch];
k3d::uint_t loops_end = loops_start + nurbs->patch_trim_loop_counts[patch];
for (k3d::uint_t loop_index = loops_start; loop_index != loops_end; ++loop_index)
{
gluBeginTrim(nurbs_renderer);
k3d::uint_t curves_start = nurbs->trim_loop_first_curves[loop_index];
k3d::uint_t curves_end = curves_start + nurbs->trim_loop_curve_counts[loop_index];
for (k3d::uint_t curve = curves_start; curve != curves_end; ++curve)
{
k3d::uint_t knots_end = nurbs->curve_first_knots[curve] + nurbs->curve_point_counts[curve] + nurbs->curve_orders[curve];
return_if_fail(knots_end <= nurbs->curve_knots.size());
std::vector<GLfloat> gl_trim_knot_vector(&nurbs->curve_knots[nurbs->curve_first_knots[curve]], &nurbs->curve_knots[knots_end]);
std::vector<GLfloat> gl_trim_control_points;
k3d::uint_t points_start = nurbs->curve_first_points[curve];
k3d::uint_t points_end = points_start + nurbs->curve_point_counts[curve];
return_if_fail(points_end <= nurbs->curve_points.size());
for (k3d::uint_t point = points_start; point != points_end; ++point)
{
k3d::point2 control_point = nurbs->points[nurbs->curve_points[point]];
double weight = nurbs->curve_point_weights[point];
gl_trim_control_points.push_back(static_cast<GLfloat>(control_point[0] * weight));
gl_trim_control_points.push_back(static_cast<GLfloat>(control_point[1] * weight));
gl_trim_control_points.push_back(static_cast<GLfloat>(weight));
}
gluNurbsCurve(nurbs_renderer, gl_trim_knot_vector.size(), &gl_trim_knot_vector[0], 3, &gl_trim_control_points[0], static_cast<GLint>(nurbs->curve_orders[curve]), GLU_MAP1_TRIM_3);
}
gluEndTrim(nurbs_renderer);
}
}
gluEndSurface(nurbs_renderer);
}
}
}
void on_select_mesh(const k3d::mesh& Mesh, const k3d::gl::painter_render_state& RenderState, const k3d::gl::painter_selection_state& SelectionState, k3d::iproperty::changed_signal_t& ChangedSignal)
{
if(!SelectionState.select_component.count(k3d::selection::PATCH))
return;
k3d::uint_t primitive_index = 0;
for(k3d::mesh::primitives_t::const_iterator primitive = Mesh.primitives.begin(); primitive != Mesh.primitives.end(); ++primitive, ++primitive_index)
{
boost::scoped_ptr<k3d::nurbs_patch::const_primitive> nurbs(k3d::nurbs_patch::validate(Mesh, **primitive));
if(!nurbs)
continue;
const k3d::mesh::points_t& points = *Mesh.points;
k3d::gl::store_attributes attributes;
glDisable(GL_LIGHTING);
glDisable(GL_AUTO_NORMAL);
glDisable(GL_CULL_FACE);
k3d::gl::push_selection_token(k3d::selection::PRIMITIVE, primitive_index);
GLfloat gl_modelview_matrix[16];
glGetFloatv(GL_MODELVIEW_MATRIX, gl_modelview_matrix);
gluLoadSamplingMatrices(nurbs_renderer, gl_modelview_matrix, RenderState.gl_projection_matrix, RenderState.gl_viewport);
const k3d::uint_t patch_begin = 0;
const k3d::uint_t patch_end = patch_begin + nurbs->patch_first_points.size();
for(k3d::uint_t patch = patch_begin; patch != patch_end; ++patch)
{
const k3d::uint_t patch_u_point_count = nurbs->patch_u_point_counts[patch];
const k3d::uint_t patch_v_point_count = nurbs->patch_v_point_counts[patch];
const k3d::uint_t patch_point_begin = nurbs->patch_first_points[patch];
const k3d::uint_t patch_point_end = patch_point_begin + (patch_u_point_count * patch_v_point_count);
const k3d::uint_t patch_u_order = nurbs->patch_u_orders[patch];
const k3d::uint_t patch_v_order = nurbs->patch_v_orders[patch];
const k3d::uint_t patch_u_first_knot = nurbs->patch_u_first_knots[patch];
const k3d::uint_t patch_v_first_knot = nurbs->patch_v_first_knots[patch];
std::vector<GLfloat> gl_u_knot_vector(&nurbs->patch_u_knots[patch_u_first_knot], &nurbs->patch_u_knots[patch_u_first_knot + patch_u_point_count + patch_u_order]);
std::vector<GLfloat> gl_v_knot_vector(&nurbs->patch_v_knots[patch_v_first_knot], &nurbs->patch_v_knots[patch_v_first_knot + patch_v_point_count + patch_v_order]);
const GLint gl_u_stride = 4;
const GLint gl_v_stride = gl_u_stride * patch_u_point_count;
std::vector<GLfloat> gl_control_points;
gl_control_points.reserve(4 * patch_u_point_count * patch_v_point_count);
for(k3d::uint_t patch_point = patch_point_begin; patch_point != patch_point_end; ++patch_point)
{
const double patch_point_weight = nurbs->patch_point_weights[patch_point];
const k3d::point3 weighted_patch_point = patch_point_weight * points[nurbs->patch_points[patch_point]];
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[0]));
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[1]));
gl_control_points.push_back(static_cast<GLfloat>(weighted_patch_point[2]));
gl_control_points.push_back(static_cast<GLfloat>(patch_point_weight));
}
k3d::gl::push_selection_token(k3d::selection::PATCH, patch);
gluBeginSurface(nurbs_renderer);
gluNurbsSurface(nurbs_renderer, gl_u_knot_vector.size(), &gl_u_knot_vector[0], gl_v_knot_vector.size(), &gl_v_knot_vector[0], gl_u_stride, gl_v_stride, &gl_control_points[0], patch_u_order, patch_v_order, GL_MAP2_VERTEX_4);
if(nurbs->patch_trim_loop_counts[patch])
{
k3d::uint_t loops_start = nurbs->patch_first_trim_loops[patch];
k3d::uint_t loops_end = loops_start + nurbs->patch_trim_loop_counts[patch];
for (k3d::uint_t loop_index = loops_start; loop_index != loops_end; ++loop_index)
{
gluBeginTrim(nurbs_renderer);
k3d::uint_t curves_start = nurbs->trim_loop_first_curves[loop_index];
k3d::uint_t curves_end = curves_start + nurbs->trim_loop_curve_counts[loop_index];
for (k3d::uint_t curve = curves_start; curve != curves_end; ++curve)
{
std::vector<GLfloat> gl_trim_knot_vector(&nurbs->curve_knots[nurbs->curve_first_knots[curve]], &nurbs->curve_knots[nurbs->curve_first_knots[curve] + nurbs->curve_point_counts[curve] + nurbs->curve_orders[curve]]);
std::vector<GLfloat> gl_trim_control_points;
k3d::uint_t points_start = nurbs->curve_first_points[curve];
k3d::uint_t points_end = points_start + nurbs->curve_point_counts[curve];
for (k3d::uint_t point = points_start; point != points_end; ++point)
{
k3d::point2 control_point = nurbs->points[nurbs->curve_points[point]];
double weight = nurbs->curve_point_weights[point];
gl_trim_control_points.push_back(static_cast<GLfloat>(control_point[0] * weight));
gl_trim_control_points.push_back(static_cast<GLfloat>(control_point[1] * weight));
gl_trim_control_points.push_back(static_cast<GLfloat>(weight));
}
gluNurbsCurve(nurbs_renderer, gl_trim_knot_vector.size(), &gl_trim_knot_vector[0], 3, &gl_trim_control_points[0], static_cast<GLint>(nurbs->curve_orders[curve]), GLU_MAP1_TRIM_3);
}
gluEndTrim(nurbs_renderer);
}
}
gluEndSurface(nurbs_renderer);
k3d::gl::pop_selection_token(); // PATCH
}
k3d::gl::pop_selection_token(); // PRIMITIVE
}
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<nurbs_patch_painter, k3d::interface_list<k3d::gl::imesh_painter > > factory(
k3d::uuid(0x8881a190, 0x9d1c4e6f, 0x8b8c0523, 0x2dc43fda),
"OpenGLNURBSPatchPainter",
_("Renders NURBS patches"),
"OpenGL Painter",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
GLUnurbsObj* const nurbs_renderer;
};
/////////////////////////////////////////////////////////////////////////////
// nurbs_patch_painter_factory
k3d::iplugin_factory& nurbs_patch_painter_factory()
{
return nurbs_patch_painter::get_factory();
}
} // namespace painters
} // namespace opengl
} // namespace module
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