curt
cb2df234ae
- Use include GLUT_H instead of refering to the file directly since Mac unfortunately chose to put this in GLUT/glut.h :-(
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
//------------------------------------------------------------------------------
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// File : camdisplay.cpp
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//------------------------------------------------------------------------------
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// GLVU : Copyright 1997 - 2002
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// The University of North Carolina at Chapel Hill
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//------------------------------------------------------------------------------
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// Permission to use, copy, modify, distribute and sell this software and its
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// documentation for any purpose is hereby granted without fee, provided that
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// the above copyright notice appear in all copies and that both that copyright
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// notice and this permission notice appear in supporting documentation.
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// Binaries may be compiled with this software without any royalties or
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// restrictions.
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//
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// The University of North Carolina at Chapel Hill makes no representations
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// about the suitability of this software for any purpose. It is provided
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// "as is" without express or implied warranty.
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//============================================================================
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// camdisplay.cpp
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//============================================================================
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include GLUT_H
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#include "camera.hpp"
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//----------------------------------------------------------------------------
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// OPENGL CAMERA FRUSTUM DRAWING ROUTINES
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//----------------------------------------------------------------------------
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void Camera::Display() const
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{
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// CALC EIGHT CORNERS OF FRUSTUM (NEAR PTS AND FAR PTS)
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Vec3f V[8];
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CalcVerts(V);
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// DRAW THE FRUSTUM IN WIREFRAME
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glBegin(GL_LINE_LOOP); // TOP FACE
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glVertex3fv(&(V[4].x)); glVertex3fv(&(V[5].x));
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glVertex3fv(&(V[1].x)); glVertex3fv(&(V[0].x));
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glEnd();
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glBegin(GL_LINE_LOOP); // BOTTOM FACE
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glVertex3fv(&(V[3].x)); glVertex3fv(&(V[2].x));
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glVertex3fv(&(V[6].x)); glVertex3fv(&(V[7].x));
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glEnd();
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glBegin(GL_LINE_LOOP); // LEFT FACE
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glVertex3fv(&(V[1].x)); glVertex3fv(&(V[5].x));
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glVertex3fv(&(V[6].x)); glVertex3fv(&(V[2].x));
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glEnd();
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glBegin(GL_LINE_LOOP); // RIGHT FACE
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glVertex3fv(&(V[0].x)); glVertex3fv(&(V[3].x));
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glVertex3fv(&(V[7].x)); glVertex3fv(&(V[4].x));
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glEnd();
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glBegin(GL_LINE_LOOP); // NEAR FACE
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glVertex3fv(&(V[1].x)); glVertex3fv(&(V[2].x));
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glVertex3fv(&(V[3].x)); glVertex3fv(&(V[0].x));
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glEnd();
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glBegin(GL_LINE_LOOP); // FAR FACE
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glVertex3fv(&(V[4].x)); glVertex3fv(&(V[7].x));
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glVertex3fv(&(V[6].x)); glVertex3fv(&(V[5].x));
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glEnd();
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// DRAW PROJECTOR LINES FROM EYE TO CORNERS OF VIEWPLANE WINDOW
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glBegin(GL_LINES);
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glVertex3fv(&(Orig.x)); glVertex3fv(&(V[1].x));
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glVertex3fv(&(Orig.x)); glVertex3fv(&(V[2].x));
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glVertex3fv(&(Orig.x)); glVertex3fv(&(V[3].x));
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glVertex3fv(&(Orig.x)); glVertex3fv(&(V[0].x));
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glEnd();
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}
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void Camera::DisplayInGreen() const
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{
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//draws the camera in unlit green lines, then restores the GL state
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glPushAttrib(GL_LIGHTING_BIT);
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glDisable(GL_LIGHTING);
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glPushAttrib(GL_LINE_BIT);
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glLineWidth(1.0);
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glColor3f(0,1,0);
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Display();
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glPopAttrib();
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glPopAttrib();
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}
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