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100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "draw_point.h"
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// Implementation
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#include "gl.h"
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#include <cassert>
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#include <cmath>
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IGL_INLINE void igl::opengl2::draw_point(
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const double x,
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const double y,
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const double z,
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const double requested_r,
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const bool selected)
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{
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// Push GL settings
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glPushAttrib(GL_ENABLE_BIT | GL_LIGHTING_BIT);
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float f;
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glGetFloatv(GL_POINT_SIZE_MAX,&f);
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// THIS IS OVERZEALOUS on Mac OS X: OpenGL reports a smaller point size than
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// possible.
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//assert(requested_r<=0.5*f);
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double r = (requested_r<0.5*f?requested_r:0.5*f);
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//glDisable(GL_DEPTH_TEST);
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glDisable(GL_LIGHTING);
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// get current color
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float color[4];
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glGetFloatv(GL_CURRENT_COLOR,color);
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double outline_size = (r>7 ? sqrt(r/7.0) : 1.0);
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// White outline
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glColor4f(1,1,1,color[3]);
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glPointSize(2*r);
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glBegin(GL_POINTS);
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glVertex3d(x,y,z);
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glEnd();
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// Black outline
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glColor4f(0,0,0,color[3]);
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glPointSize(2*r-2*outline_size);
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glBegin(GL_POINTS);
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glVertex3d(x,y,z);
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glEnd();
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// Foreground
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glColor4fv(color);
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glPointSize(2*r-4*outline_size);
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glBegin(GL_POINTS);
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glVertex3d(x,y,z);
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glEnd();
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// Selection inner circle
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if(selected)
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{
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glColor4f(0,0,0,color[3]);
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double selected_size = 2*r-7*outline_size;
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selected_size = (selected_size>3?selected_size:3);
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glPointSize(selected_size);
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glBegin(GL_POINTS);
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glVertex3d(x,y,z);
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glEnd();
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}
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// reset color
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glColor4fv(color);
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// Pop GL settings
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glPopAttrib();
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}
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template <typename DerivedP>
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IGL_INLINE void igl::opengl2::draw_point(
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const Eigen::PlainObjectBase<DerivedP> & P,
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const double requested_r,
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const bool selected)
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{
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switch(P.size())
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{
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case 2:
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return draw_point(P(0),P(1),0,requested_r,selected);
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default:
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return draw_point(P(0),P(1),P(2),requested_r,selected);
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}
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template void igl::opengl2::draw_point<Eigen::Matrix<double, 3, 1, 0, 3, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, 3, 1, 0, 3, 1> > const&, double, bool);
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template void igl::opengl2::draw_point<Eigen::Matrix<double, 2, 1, 0, 2, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, 2, 1, 0, 2, 1> > const&, double, bool);
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#endif
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