+++ /dev/null
-// Copyright (C) 2006 Erik Dahlberg
-//
-// This file is part of LSystem3d.
-//
-// LSystem3D is free software; you can redistribute it and/or
-// modify it under the terms of the GNU General Public License
-// as published by the Free Software Foundation; either version 2
-// of the License, or (at your option) any later version.
-//
-// LSystem3D 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 General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with LSystem3D; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-
-
-#include <cmath>
-
-#include <stack>
-
-#include "coordinate.h"
-#include "model.h"
-#include "turtle.h"
-#include "vector.h"
-
-
-
-/**
- * Constructor
- * @param model render this model
- */
-Turtle::Turtle(Model *model)
-{
- // initial position and orientation
- reset();
-
- // 90 degrees
- _angle = M_PIl / 2.0;
-
- _model = model;
-}
-
-
-
-/**
- * Destructor
- */
-Turtle::~Turtle()
-{
-}
-
-
-
-/**
- * Turn left
- */
-void Turtle::turnLeft()
-{
- // rotate around "up vector"
- _heading.rotate(-_angle, _up);
- _left.rotate(-_angle, _up);
-}
-
-
-
-/**
- * Turn right
- */
-void Turtle::turnRight()
-{
- // rotate around "up vector"
- _heading.rotate(_angle, _up);
- _left.rotate(_angle, _up);
-}
-
-
-
-/**
- * Pitch down
- */
-void Turtle::pitchDown()
-{
- // rotate around "left vector"
- _heading.rotate(-_angle, _left);
- _up.rotate(-_angle, _left);
-}
-
-
-
-/**
- * Pitch up
- */
-void Turtle::pitchUp()
-{
- // rotate around "left vector"
- _heading.rotate(_angle, _left);
- _up.rotate(_angle, _left);
-}
-
-
-
-/**
- * Roll left
- */
-void Turtle::rollLeft()
-{
- // rotate around "heading vector"
- _left.rotate(_angle, _heading);
- _up.rotate(_angle, _heading);
-}
-
-
-
-/**
- * Roll right
- */
-void Turtle::rollRight()
-{
- // rotate around "heading vector"
- _left.rotate(-_angle, _heading);
- _up.rotate(-_angle, _heading);
-}
-
-
-
-/**
- * Turn around
- */
-void Turtle::turnAround()
-{
- // rotate 180 degrees around "up vector"
- _heading.rotate(M_PIl, _up);
- _left.rotate(M_PIl, _up);
-}
-
-
-
-/**
- * Walk forward
- */
-void Turtle::walk()
-{
- // start point
- double startX = _position.getX();
- double startY = _position.getY();
- double startZ = _position.getZ();
-
- // end point
- double endX = startX + _heading.getX();
- double endY = startY + _heading.getY();
- double endZ = startZ + _heading.getZ();
-
-
- // move turtle to new position
- _position.setXYZ(endX, endY, endZ);
-
- if (!_fenceMode)
- {
- // connect the points
- _model->segment(_diameter,
- startX, startY, startZ,
- endX, endY, endZ);
- }
- else
- {
- // part of a filled surface
- _model->point(endX, endY, endZ);
- }
-}
-
-
-
-/**
- * Save current state to stack
- */
-void Turtle::push()
-{
- // position
- _positionStack.push(_position);
-
- // orientation
- _headingStack.push(_heading);
- _leftStack.push(_left);
- _upStack.push(_up);
-
- // diameter
- _diameterStack.push(_diameter);
-}
-
-
-
-/**
- * Restore old state from stack
- */
-void Turtle::pop()
-{
- // position
- _position = _positionStack.top(); _positionStack.pop();
-
- // orientation
- _heading = _headingStack.top(); _headingStack.pop();
- _left = _leftStack.top(); _leftStack.pop();
- _up = _upStack.top(); _upStack.pop();
-
- // diameter
- _diameter = _diameterStack.top(); _diameterStack.pop();
-}
-
-
-
-/**
- * Reset to default state
- */
-void Turtle::reset()
-{
- _diameter = 0.1;
-
- _fenceMode = false;
-
-
- // put turtle at (0,0,0), head upwards, back towards camera
-
- _position.setXYZ(0.0, 0.0, 0.0);
-
- _heading.setXYZ(0.0, 1.0, 0.0);
- _left.setXYZ(1.0, 0.0, 0.0);
- _up.setXYZ(0.0, 0.0, 1.0);
-}
-
-
-
-/**
- * Decrement diameter of segment
- */
-void Turtle::decrementDiameter()
-{
- // TODO: dynamic value...
- _diameter *= 0.8;
-}
-
-
-
-/**
- * Begin creation of a filled surface
- */
-void Turtle::fenceInBegin()
-{
- _fenceMode = true;
-
- _model->fillBegin();
- _model->point(_position.getX(), _position.getY(), _position.getZ());
-}
-
-
-
-/**
- * End creation of a filled surface
- */
-void Turtle::fenceInEnd()
-{
- _model->fillEnd();
-
- _fenceMode = false;
-}
-
-
-
-/**
- * Set turn/pitch/roll angle
- * @param angle the angle, in radians
- */
-void Turtle::setAngle(double radians)
-{
- _angle = radians;
-}
-
-
-
-/**
- * Get turn/pitch/roll angle
- * @return the angle, in radians
- */
-double Turtle::getAngle()
-{
- return _angle;
-}
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