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Wednesday the 23rd of May 2012 @ 05:39pm

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cRSkyMobileSprite.cpp Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2002 Aaron Cameron This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #include "renderObjects/cRSkyMobileSprite.h" #include "n2l/materials.h" #include "renderObjects/cRFrustum.h" #include <iostream> using namespace std; namespace n2l { /**************************************************************************/ cRSkyMobileSprite::cRSkyMobileSprite( const tString &iName, const cAutoPtr<const cGLTexture> &iTexture ) { if (!iTexture.isSet()) throw cBadDataUseException( "cRSkyMobileSprite::cRSkyMobileSprite", "Cannot create a sprite with no texture for sprite :\"" + iName + "\"" ); mName = iName; mTexture = iTexture; } /**************************************************************************/ // cRSkyMobileSprite::cRSkyMobileSprite( const cRSkyMobileSprite &iSprite ) // { // } /**************************************************************************/ const tVector3f cRSkyMobileSprite::mappedPos() const { tVector3f avg = mA; avg += mB; avg += mC; avg += mD; avg /= 4.0f; return avg; } /**************************************************************************/ const tVector3f cRSkyMobileSprite::mappedSize() const { // tVector3f size( fabsf(mB.x()-mC.x()), fabsf(mA.y()-mB.y()), .0f ); return tVector3f( (mB-mC).magnitude(), (mA-mB).magnitude() ); } /**************************************************************************/ void cRSkyMobileSprite::relocate( const tVector3f &iViewpoint ) { processAtLocation( mPos - iViewpoint ); } /**************************************************************************/ void cRSkyMobileSprite::locate( const tVector3f &iPos, const tVector3f &iSize, const tFloat &iZRot, const tFloat &iEqlDist ) { mPos = iPos; mSize = iSize; mZRot = iZRot; mEqlDist = iEqlDist; processAtLocation( mPos ); } /**************************************************************************/ void cRSkyMobileSprite::draw( const cRFrustum &iFrustum, const tVector3f &iPosAdjust ) const { if (!iFrustum.testQuad( mA+iPosAdjust, mB+iPosAdjust, mC+iPosAdjust, mD+iPosAdjust)) { return; } mTexture->bind(); glBegin( GL_QUADS ); glTexCoord2f( 0,0 ); mA.glVertex3f(); glTexCoord2f( 0,1 ); mB.glVertex3f(); glTexCoord2f( 1,1 ); mC.glVertex3f(); glTexCoord2f( 1,0 ); mD.glVertex3f(); glEnd(); } /**************************************************************************/ void cRSkyMobileSprite::processAtLocation( const tVector3f &iPos ) { static const tFloat NintyRad = n2lDegToRad( 90.0f ); static const tFloat OneEightRad = n2lDegToRad( 180.0f ); static const tVector3f Zero(.0f, .0f, .0f); static const tVector3f FDir( .0f,.0f,1.0f ); static const tVector3f Up( .0f,1.0f,.0f ); static const tVector3f Left( 1.0f,.0f,.0f ); const tVector3f Dir = iPos.normalized(); const tFloat Dist = iPos.magnitude(); const tVector3f HalfSize = mSize * .5f; tFloat theta = - (Dir.anglefR( Left ) - NintyRad); if (Dir.cross(Left).y()<.0) theta = OneEightRad-theta; tVector3f tmp = Dir; tmp.rotateR( theta, Up.x(),Up.y(),Up.z() ); tFloat delta = (tmp.anglefR( Up ) - NintyRad ); tPlane3f EqPl( FDir, FDir*mEqlDist ); mA = FDir*Dist + (Up * HalfSize.y()) + (Left * HalfSize.x()); mB = FDir*Dist - (Up * HalfSize.y()) + (Left * HalfSize.x()); mC = FDir*Dist - (Up * HalfSize.y()) - (Left * HalfSize.x()); mD = FDir*Dist + (Up * HalfSize.y()) - (Left * HalfSize.x()); mA = EqPl.intersect( Zero, mA ); mB = EqPl.intersect( Zero, mB ); mC = EqPl.intersect( Zero, mC ); mD = EqPl.intersect( Zero, mD ); mA.rotateR( theta, Up.x(), Up.y(), Up.z() ); mB.rotateR( theta, Up.x(), Up.y(), Up.z() ); mC.rotateR( theta, Up.x(), Up.y(), Up.z() ); mD.rotateR( theta, Up.x(), Up.y(), Up.z() ); mA.rotateR( delta, Left.x(), Left.y(), Left.z() ); mB.rotateR( delta, Left.x(), Left.y(), Left.z() ); mC.rotateR( delta, Left.x(), Left.y(), Left.z() ); mD.rotateR( delta, Left.x(), Left.y(), Left.z() ); } } // namespace

©2012 Aaron Cameron