mirror of https://github.com/vitalif/openscad
132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
/*
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* OpenSCAD (www.openscad.org)
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* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
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* Marius Kintel <marius@kintel.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* As a special exception, you have permission to link this program
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* with the CGAL library and distribute executables, as long as you
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* follow the requirements of the GNU GPL in regard to all of the
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* software in the executable aside from CGAL.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "system-gl.h"
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#include "OpenCSGRenderer.h"
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#include "polyset.h"
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#include "csgterm.h"
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#include "stl-utils.h"
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#ifdef ENABLE_OPENCSG
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# include <opencsg.h>
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#endif
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class OpenCSGPrim : public OpenCSG::Primitive
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{
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public:
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OpenCSGPrim(OpenCSG::Operation operation, unsigned int convexity) :
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OpenCSG::Primitive(operation, convexity) { }
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shared_ptr<PolySet> ps;
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Transform3d m;
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PolySet::csgmode_e csgmode;
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virtual void render() {
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glPushMatrix();
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glMultMatrixd(m.data());
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ps->render_surface(csgmode, m);
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glPopMatrix();
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}
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};
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OpenCSGRenderer::OpenCSGRenderer(CSGChain *root_chain, CSGChain *highlights_chain,
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CSGChain *background_chain, GLint *shaderinfo)
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: root_chain(root_chain), highlights_chain(highlights_chain),
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background_chain(background_chain), shaderinfo(shaderinfo)
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{
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}
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void OpenCSGRenderer::draw(bool /*showfaces*/, bool showedges) const
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{
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if (this->root_chain) {
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GLint *shaderinfo = this->shaderinfo;
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if (!shaderinfo[0]) shaderinfo = NULL;
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renderCSGChain(this->root_chain, showedges ? shaderinfo : NULL, false, false);
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if (this->background_chain) {
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renderCSGChain(this->background_chain, showedges ? shaderinfo : NULL, false, true);
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}
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if (this->highlights_chain) {
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renderCSGChain(this->highlights_chain, showedges ? shaderinfo : NULL, true, false);
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}
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}
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}
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void OpenCSGRenderer::renderCSGChain(CSGChain *chain, GLint *shaderinfo,
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bool highlight, bool background) const
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{
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std::vector<OpenCSG::Primitive*> primitives;
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size_t j = 0;
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for (size_t i = 0;; i++) {
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bool last = i == chain->polysets.size();
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if (last || chain->types[i] == CSGTerm::TYPE_UNION) {
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if (j+1 != i) {
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OpenCSG::render(primitives);
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glDepthFunc(GL_EQUAL);
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}
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if (shaderinfo) glUseProgram(shaderinfo[0]);
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for (; j < i; j++) {
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const Transform3d &m = chain->matrices[j];
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const Color4f &c = chain->colors[j];
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glPushMatrix();
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glMultMatrixd(m.data());
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PolySet::csgmode_e csgmode = chain->types[j] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
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if (highlight) {
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setColor(COLORMODE_HIGHLIGHT, shaderinfo);
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csgmode = PolySet::csgmode_e(csgmode + 20);
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}
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else if (background) {
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setColor(COLORMODE_BACKGROUND, shaderinfo);
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csgmode = PolySet::csgmode_e(csgmode + 10);
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} else if (c[0] >= 0 || c[1] >= 0 || c[2] >= 0 || c[3] >= 0) {
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// User-defined color or alpha from source
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setColor(c.data(), shaderinfo);
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} else if (chain->types[j] == CSGTerm::TYPE_DIFFERENCE) {
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setColor(COLORMODE_CUTOUT, shaderinfo);
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} else {
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setColor(COLORMODE_MATERIAL, shaderinfo);
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}
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chain->polysets[j]->render_surface(csgmode, m, shaderinfo);
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glPopMatrix();
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}
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if (shaderinfo) glUseProgram(0);
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for (unsigned int k = 0; k < primitives.size(); k++) {
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delete primitives[k];
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}
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glDepthFunc(GL_LEQUAL);
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primitives.clear();
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}
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if (last) break;
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OpenCSGPrim *prim = new OpenCSGPrim(chain->types[i] == CSGTerm::TYPE_DIFFERENCE ?
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OpenCSG::Subtraction : OpenCSG::Intersection, chain->polysets[i]->convexity);
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prim->ps = chain->polysets[i];
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prim->m = chain->matrices[i];
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prim->csgmode = chain->types[i] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
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if (highlight) prim->csgmode = PolySet::csgmode_e(prim->csgmode + 20);
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else if (background) prim->csgmode = PolySet::csgmode_e(prim->csgmode + 10);
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primitives.push_back(prim);
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}
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std::for_each(primitives.begin(), primitives.end(), del_fun<OpenCSG::Primitive>());
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}
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