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/*
* OpenSCAD (www.openscad.org)
* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
* Marius Kintel <marius@kintel.net>
*
* 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.
*
* As a special exception, you have permission to link this program
* with the CGAL library and distribute executables, as long as you
* follow the requirements of the GNU GPL in regard to all of the
* software in the executable aside from CGAL.
*
* 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
*
*/
#include <GL/glew.h>
#include "OpenCSGRenderer.h"
#include "polyset.h"
#include "csgterm.h"
#ifdef ENABLE_OPENCSG
# include <opencsg.h>
#endif
class OpenCSGPrim : public OpenCSG::Primitive
{
public:
OpenCSGPrim(OpenCSG::Operation operation, unsigned int convexity) :
OpenCSG::Primitive(operation, convexity) { }
PolySet *p;
double *m;
int csgmode;
virtual void render() {
glPushMatrix();
glMultMatrixd(m);
p->render_surface(PolySet::COLORMODE_NONE, PolySet::csgmode_e(csgmode), m);
glPopMatrix();
}
};
OpenCSGRenderer::OpenCSGRenderer(CSGChain *root_chain, CSGChain *highlights_chain,
CSGChain *background_chain, GLint *shaderinfo)
: root_chain(root_chain), highlights_chain(highlights_chain),
background_chain(background_chain), shaderinfo(shaderinfo)
{
}
void OpenCSGRenderer::draw(bool showfaces, bool showedges) const
{
if (this->root_chain) {
GLint *shaderinfo = this->shaderinfo;
if (!shaderinfo[0]) shaderinfo = NULL;
renderCSGChain(this->root_chain, showedges ? shaderinfo : NULL, false, false);
if (this->background_chain) {
renderCSGChain(this->background_chain, showedges ? shaderinfo : NULL, false, true);
}
if (this->highlights_chain) {
renderCSGChain(this->highlights_chain, showedges ? shaderinfo : NULL, true, false);
}
}
}
void OpenCSGRenderer::renderCSGChain(CSGChain *chain, GLint *shaderinfo,
bool highlight, bool background) const
{
std::vector<OpenCSG::Primitive*> primitives;
int j = 0;
for (int i = 0;; i++) {
bool last = i == chain->polysets.size();
if (last || chain->types[i] == CSGTerm::TYPE_UNION) {
if (j+1 != i) {
OpenCSG::render(primitives);
glDepthFunc(GL_EQUAL);
}
if (shaderinfo) glUseProgram(shaderinfo[0]);
for (; j < i; j++) {
double *m = chain->matrices[j];
glPushMatrix();
glMultMatrixd(m);
int csgmode = chain->types[j] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
if (highlight) {
chain->polysets[j]->render_surface(PolySet::COLORMODE_HIGHLIGHT, PolySet::csgmode_e(csgmode + 20), m, shaderinfo);
} else if (background) {
chain->polysets[j]->render_surface(PolySet::COLORMODE_BACKGROUND, PolySet::csgmode_e(csgmode + 10), m, shaderinfo);
} else if (m[16] >= 0 || m[17] >= 0 || m[18] >= 0 || m[19] >= 0) {
// User-defined color from source
glColor4d(m[16], m[17], m[18], m[19]);
if (shaderinfo) {
glUniform4f(shaderinfo[1], m[16], m[17], m[18], m[19]);
glUniform4f(shaderinfo[2], (m[16]+1)/2, (m[17]+1)/2, (m[18]+1)/2, 1.0);
}
chain->polysets[j]->render_surface(PolySet::COLORMODE_NONE, PolySet::csgmode_e(csgmode), m, shaderinfo);
} else if (chain->types[j] == CSGTerm::TYPE_DIFFERENCE) {
chain->polysets[j]->render_surface(PolySet::COLORMODE_CUTOUT, PolySet::csgmode_e(csgmode), m, shaderinfo);
} else {
chain->polysets[j]->render_surface(PolySet::COLORMODE_MATERIAL, PolySet::csgmode_e(csgmode), m, shaderinfo);
}
glPopMatrix();
}
if (shaderinfo) glUseProgram(0);
for (unsigned int k = 0; k < primitives.size(); k++) {
delete primitives[k];
}
glDepthFunc(GL_LEQUAL);
primitives.clear();
}
if (last) break;
OpenCSGPrim *prim = new OpenCSGPrim(chain->types[i] == CSGTerm::TYPE_DIFFERENCE ?
OpenCSG::Subtraction : OpenCSG::Intersection, chain->polysets[i]->convexity);
prim->p = chain->polysets[i];
prim->m = chain->matrices[i];
prim->csgmode = chain->types[i] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
if (highlight) prim->csgmode += 20;
else if (background) prim->csgmode += 10;
primitives.push_back(prim);
}
}
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