mirror of https://github.com/vitalif/openscad
442 lines
12 KiB
C++
442 lines
12 KiB
C++
/*
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* OpenSCAD (www.openscad.at)
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* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
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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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* 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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#define INCLUDE_ABSTRACT_NODE_DETAILS
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#include "openscad.h"
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QCache<QString,PolySetPtr> PolySet::ps_cache(100);
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PolySet::PolySet()
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{
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is2d = false;
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convexity = 1;
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refcount = 1;
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}
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PolySet::~PolySet()
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{
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assert(refcount == 0);
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}
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PolySet* PolySet::link()
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{
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refcount++;
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return this;
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}
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void PolySet::unlink()
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{
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if (--refcount == 0)
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delete this;
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}
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void PolySet::append_poly()
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{
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polygons.append(Polygon());
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}
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void PolySet::append_vertex(double x, double y, double z)
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{
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grid.align(x, y, z);
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polygons.last().append(Point(x, y, z));
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}
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void PolySet::insert_vertex(double x, double y, double z)
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{
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grid.align(x, y, z);
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polygons.last().insert(0, Point(x, y, z));
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}
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static void gl_draw_triangle(GLint *shaderinfo, const PolySet::Point *p0, const PolySet::Point *p1, const PolySet::Point *p2, bool e0, bool e1, bool e2, double z)
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{
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double ax = p1->x - p0->x, bx = p1->x - p2->x;
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double ay = p1->y - p0->y, by = p1->y - p2->y;
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double az = p1->z - p0->z, bz = p1->z - p2->z;
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double nx = ay*bz - az*by;
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double ny = az*bx - ax*bz;
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double nz = ax*by - ay*bx;
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double nl = sqrt(nx*nx + ny*ny + nz*nz);
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glNormal3d(nx / nl, ny / nl, nz / nl);
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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double e0f = e0 ? 2.0 : -1.0;
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double e1f = e1 ? 2.0 : -1.0;
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double e2f = e2 ? 2.0 : -1.0;
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glVertexAttrib3d(shaderinfo[3], e0f, e1f, e2f);
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glVertexAttrib3d(shaderinfo[4], p1->x, p1->y, p1->z + z);
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glVertexAttrib3d(shaderinfo[5], p2->x, p2->y, p2->z + z);
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glVertexAttrib3d(shaderinfo[6], 0.0, 1.0, 0.0);
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glVertex3d(p0->x, p0->y, p0->z + z);
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glVertexAttrib3d(shaderinfo[3], e0f, e1f, e2f);
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glVertexAttrib3d(shaderinfo[4], p0->x, p0->y, p0->z + z);
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glVertexAttrib3d(shaderinfo[5], p2->x, p2->y, p2->z + z);
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glVertexAttrib3d(shaderinfo[6], 0.0, 0.0, 1.0);
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glVertex3d(p1->x, p1->y, p1->z + z);
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glVertexAttrib3d(shaderinfo[3], e0f, e1f, e2f);
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glVertexAttrib3d(shaderinfo[4], p0->x, p0->y, p0->z + z);
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glVertexAttrib3d(shaderinfo[5], p1->x, p1->y, p1->z + z);
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glVertexAttrib3d(shaderinfo[6], 1.0, 0.0, 0.0);
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glVertex3d(p2->x, p2->y, p2->z + z);
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}
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else
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#endif
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{
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glVertex3d(p0->x, p0->y, p0->z + z);
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glVertex3d(p1->x, p1->y, p1->z + z);
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glVertex3d(p2->x, p2->y, p2->z + z);
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}
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}
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void PolySet::render_surface(colormode_e colormode, csgmode_e csgmode, GLint *shaderinfo) const
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{
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if (colormode == COLORMODE_MATERIAL) {
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glColor3ub(249, 215, 44);
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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glUniform4f(shaderinfo[1], 249 / 255.0, 215 / 255.0, 44 / 255.0, 1.0);
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glUniform4f(shaderinfo[2], 255 / 255.0, 236 / 255.0, 94 / 255.0, 1.0);
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}
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#endif /* ENABLE_OPENCSG */
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}
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if (colormode == COLORMODE_CUTOUT) {
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glColor3ub(157, 203, 81);
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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glUniform4f(shaderinfo[1], 157 / 255.0, 203 / 255.0, 81 / 255.0, 1.0);
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glUniform4f(shaderinfo[2], 171 / 255.0, 216 / 255.0, 86 / 255.0, 1.0);
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}
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#endif /* ENABLE_OPENCSG */
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}
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if (colormode == COLORMODE_HIGHLIGHT) {
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glColor4ub(255, 157, 81, 128);
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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glUniform4f(shaderinfo[1], 255 / 255.0, 157 / 255.0, 81 / 255.0, 0.5);
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glUniform4f(shaderinfo[2], 255 / 255.0, 171 / 255.0, 86 / 255.0, 0.5);
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}
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#endif /* ENABLE_OPENCSG */
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}
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if (colormode == COLORMODE_BACKGROUND) {
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glColor4ub(180, 180, 180, 128);
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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glUniform4f(shaderinfo[1], 180 / 255.0, 180 / 255.0, 180 / 255.0, 0.5);
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glUniform4f(shaderinfo[2], 150 / 255.0, 150 / 255.0, 150 / 255.0, 0.5);
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}
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#endif /* ENABLE_OPENCSG */
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}
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#ifdef ENABLE_OPENCSG
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if (shaderinfo) {
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glUniform1f(shaderinfo[7], shaderinfo[9]);
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glUniform1f(shaderinfo[8], shaderinfo[10]);
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}
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#endif /* ENABLE_OPENCSG */
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if (this->is2d) {
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double zbase = csgmode;
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for (double z = -zbase/2; z < zbase; z += zbase)
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{
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for (int i = 0; i < polygons.size(); i++) {
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const Polygon *poly = &polygons[i];
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glBegin(GL_TRIANGLES);
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if (poly->size() == 3) {
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if (z < 0) {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(2), &poly->at(1), true, true, true, z);
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} else {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(1), &poly->at(2), true, true, true, z);
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}
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}
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else if (poly->size() == 4) {
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if (z < 0) {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(3), &poly->at(1), true, false, true, z);
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gl_draw_triangle(shaderinfo, &poly->at(2), &poly->at(1), &poly->at(3), true, false, true, z);
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} else {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(1), &poly->at(3), true, false, true, z);
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gl_draw_triangle(shaderinfo, &poly->at(2), &poly->at(3), &poly->at(1), true, false, true, z);
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}
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}
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else {
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Point center;
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for (int j = 0; j < poly->size(); j++) {
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center.x += poly->at(j).x;
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center.y += poly->at(j).y;
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}
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center.x /= poly->size();
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center.y /= poly->size();
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for (int j = 1; j <= poly->size(); j++) {
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if (z < 0) {
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gl_draw_triangle(shaderinfo, ¢er, &poly->at(j % poly->size()), &poly->at(j - 1),
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false, true, false, z);
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} else {
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gl_draw_triangle(shaderinfo, ¢er, &poly->at(j - 1), &poly->at(j % poly->size()),
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false, true, false, z);
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}
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}
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}
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if (z < 0) {
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for (int j = 1; j <= poly->size(); j++) {
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Point p1 = poly->at(j - 1), p2 = poly->at(j - 1);
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Point p3 = poly->at(j % poly->size()), p4 = poly->at(j % poly->size());
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p1.z -= zbase/2, p2.z += zbase/2;
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p3.z -= zbase/2, p4.z += zbase/2;
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gl_draw_triangle(shaderinfo, &p2, &p1, &p3, true, true, false, 0);
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gl_draw_triangle(shaderinfo, &p2, &p3, &p4, false, true, true, 0);
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}
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}
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glEnd();
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}
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}
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} else {
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for (int i = 0; i < polygons.size(); i++) {
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const Polygon *poly = &polygons[i];
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glBegin(GL_TRIANGLES);
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if (poly->size() == 3) {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(1), &poly->at(2), true, true, true, 0);
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}
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else if (poly->size() == 4) {
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gl_draw_triangle(shaderinfo, &poly->at(0), &poly->at(1), &poly->at(3), true, false, true, 0);
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gl_draw_triangle(shaderinfo, &poly->at(2), &poly->at(3), &poly->at(1), true, false, true, 0);
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}
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else {
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Point center;
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for (int j = 0; j < poly->size(); j++) {
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center.x += poly->at(j).x;
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center.y += poly->at(j).y;
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center.z += poly->at(j).z;
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}
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center.x /= poly->size();
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center.y /= poly->size();
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center.z /= poly->size();
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for (int j = 1; j <= poly->size(); j++) {
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gl_draw_triangle(shaderinfo, ¢er, &poly->at(j - 1), &poly->at(j % poly->size()), false, true, false, 0);
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}
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}
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glEnd();
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}
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}
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}
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void PolySet::render_edges(colormode_e colormode, csgmode_e csgmode) const
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{
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if (colormode == COLORMODE_MATERIAL)
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glColor3ub(255, 236, 94);
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if (colormode == COLORMODE_CUTOUT)
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glColor3ub(171, 216, 86);
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if (colormode == COLORMODE_HIGHLIGHT)
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glColor4ub(255, 171, 86, 128);
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if (colormode == COLORMODE_BACKGROUND)
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glColor4ub(150, 150, 150, 128);
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if (this->is2d) {
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double zbase = csgmode;
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for (double z = -zbase/2; z < zbase; z += zbase)
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{
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for (int i = 0; i < polygons.size(); i++) {
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const Polygon *poly = &polygons[i];
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glBegin(GL_LINE_LOOP);
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for (int j = 0; j < poly->size(); j++) {
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const Point *p = &poly->at(j);
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glVertex3d(p->x, p->y, z);
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}
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glEnd();
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}
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}
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for (int i = 0; i < polygons.size(); i++) {
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const Polygon *poly = &polygons[i];
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glBegin(GL_LINES);
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for (int j = 0; j < poly->size(); j++) {
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const Point *p = &poly->at(j);
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glVertex3d(p->x, p->y, -zbase/2);
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glVertex3d(p->x, p->y, +zbase/2);
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}
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glEnd();
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}
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} else {
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for (int i = 0; i < polygons.size(); i++) {
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const Polygon *poly = &polygons[i];
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glBegin(GL_LINE_LOOP);
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for (int j = 0; j < poly->size(); j++) {
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const Point *p = &poly->at(j);
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glVertex3d(p->x, p->y, p->z);
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}
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glEnd();
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}
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}
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}
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#ifdef ENABLE_CGAL
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#undef GEN_SURFACE_DEBUG
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class CGAL_Build_PolySet : public CGAL::Modifier_base<CGAL_HDS>
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{
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public:
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typedef CGAL_HDS::Vertex::Point Point;
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const PolySet *ps;
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CGAL_Build_PolySet(const PolySet *ps) : ps(ps) { }
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void operator()(CGAL_HDS& hds)
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{
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CGAL_Polybuilder B(hds, true);
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QVector<PolySet::Point> vertices;
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Grid3d<int> vertices_idx;
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for (int i = 0; i < ps->polygons.size(); i++) {
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const PolySet::Polygon *poly = &ps->polygons[i];
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for (int j = 0; j < poly->size(); j++) {
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const PolySet::Point *p = &poly->at(j);
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if (!vertices_idx.has(p->x, p->y, p->z)) {
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vertices_idx.data(p->x, p->y, p->z) = vertices.size();
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vertices.append(*p);
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}
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}
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}
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B.begin_surface(vertices.size(), ps->polygons.size());
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#ifdef GEN_SURFACE_DEBUG
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printf("=== CGAL Surface ===\n");
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#endif
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for (int i = 0; i < vertices.size(); i++) {
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const PolySet::Point *p = &vertices[i];
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B.add_vertex(Point(p->x, p->y, p->z));
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#ifdef GEN_SURFACE_DEBUG
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printf("%d: %f %f %f\n", i, p->x, p->y, p->z);
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#endif
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}
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for (int i = 0; i < ps->polygons.size(); i++) {
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const PolySet::Polygon *poly = &ps->polygons[i];
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QHash<int,int> fc;
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bool facet_is_degenerated = false;
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for (int j = 0; j < poly->size(); j++) {
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const PolySet::Point *p = &poly->at(j);
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int v = vertices_idx.data(p->x, p->y, p->z);
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if (fc[v]++ > 0)
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facet_is_degenerated = true;
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}
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if (!facet_is_degenerated)
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B.begin_facet();
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#ifdef GEN_SURFACE_DEBUG
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printf("F:");
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#endif
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for (int j = 0; j < poly->size(); j++) {
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const PolySet::Point *p = &poly->at(j);
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#ifdef GEN_SURFACE_DEBUG
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printf(" %d", vertices_idx.data(p->x, p->y, p->z));
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#endif
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if (!facet_is_degenerated)
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B.add_vertex_to_facet(vertices_idx.data(p->x, p->y, p->z));
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}
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#ifdef GEN_SURFACE_DEBUG
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if (facet_is_degenerated)
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printf(" (degenerated)\n");
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printf("\n");
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#endif
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if (!facet_is_degenerated)
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B.end_facet();
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}
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#ifdef GEN_SURFACE_DEBUG
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printf("====================\n");
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#endif
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B.end_surface();
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#undef PointKey
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}
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};
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CGAL_Nef_polyhedron PolySet::render_cgal_nef_polyhedron() const
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{
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if (this->is2d)
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{
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int len = this->polygons[0].size();
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if (len > 0) {
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CGAL_Nef_polyhedron2::Point points[len];
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for (int i = 0; i < len; i++)
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points[i] = CGAL_Nef_polyhedron2::Point(this->polygons[0][i].x,
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this->polygons[0][i].y);
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CGAL_Nef_polyhedron2 N(points, points+len);
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return CGAL_Nef_polyhedron(N);
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}
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}
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else
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{
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CGAL_Polyhedron P;
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CGAL_Build_PolySet builder(this);
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P.delegate(builder);
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#if 0
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std::cout << P;
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#endif
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CGAL_Nef_polyhedron3 N(P);
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return CGAL_Nef_polyhedron(N);
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}
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return CGAL_Nef_polyhedron();
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}
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#endif /* ENABLE_CGAL */
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PolySet *AbstractPolyNode::render_polyset(render_mode_e) const
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{
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return NULL;
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}
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#ifdef ENABLE_CGAL
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CGAL_Nef_polyhedron AbstractPolyNode::render_cgal_nef_polyhedron() const
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{
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QString cache_id = mk_cache_id();
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if (cgal_nef_cache.contains(cache_id)) {
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progress_report();
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return *cgal_nef_cache[cache_id];
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}
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PolySet *ps = render_polyset(RENDER_CGAL);
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CGAL_Nef_polyhedron N = ps->render_cgal_nef_polyhedron();
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cgal_nef_cache.insert(cache_id, new CGAL_Nef_polyhedron(N), N.weight());
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progress_report();
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ps->unlink();
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return N;
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}
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#endif /* ENABLE_CGAL */
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CSGTerm *AbstractPolyNode::render_csg_term(double m[16], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background) const
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{
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PolySet *ps = render_polyset(RENDER_OPENCSG);
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return render_csg_term_from_ps(m, highlights, background, ps, modinst, idx);
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}
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CSGTerm *AbstractPolyNode::render_csg_term_from_ps(double m[16], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background, PolySet *ps, const ModuleInstanciation *modinst, int idx)
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{
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CSGTerm *t = new CSGTerm(ps, m, QString("n%1").arg(idx));
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if (modinst->tag_highlight && highlights)
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highlights->append(t->link());
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if (modinst->tag_background && background) {
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background->append(t);
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return NULL;
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}
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return t;
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}
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