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L_system.cpp
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L_system.cpp
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#include <iostream>
#include "L_system.h"
#define PI 3.14159
GLUquadric* qobj = gluNewQuadric();
void L_system::scale(double scalenum)
{
glScaled(scalenum, scalenum, scalenum);
}
void L_system::drawellipse(double x, double y, double xsize, double ysize)
{
float i;
float triangleAmount = 40; //# of triangles used to draw circle
GLfloat radius = 1.5f; //radius
GLfloat twicePi = 2.0f * 3.14159f;
glBegin(GL_TRIANGLE_FAN);
glColor3f(0,1,0);
glVertex2f(x, y); // center of circle
for (i = 0; i <= triangleAmount; i++) {
glVertex2f(
x + xsize*(radius * cos(i * twicePi / triangleAmount)),
y + ysize*(radius * sin(i * twicePi / triangleAmount))
);
}
glEnd();
}
void L_system::drawcylinder()
{
glPushMatrix();
glRotated(90, 0, 1, 0);
glColor3f(.627, .322, .176);
gluQuadricNormals(qobj, GLU_SMOOTH);
gluCylinder(qobj, .2f, .2f, 3.0f, 32, 32);
glPopMatrix();
glTranslated(3, 0, 0);
}
void L_system::drawline(double r, double g, double b)
{
glBegin(GL_QUADS);
glColor3f(r, g, b);
glVertex3f(0, width, 0.0);
glVertex3f(3, width, 0.0);
glVertex3f(3, -width, 0.0);
glVertex3f(0, -width, 0.0);
glEnd();
glTranslated(3, 0, 0);
}
void L_system::turnright()
{
glRotated(-angle,0,0,1);
}
void L_system::turnleft()
{
glRotated(angle, 0, 0, 1);
}
void L_system::pitchdown()
{
glRotated(angle, 0, 1, 0);
}
void L_system::pitchup()
{
glRotated(-angle, 0, 1, 0);
}
void L_system::rollleft()
{
glRotated(angle, 1, 0, 0);
}
void L_system::rollright()
{
glRotated(-angle, 1, 0, 0);
}
void L_system::turnaround()
{
glRotated(180, 1, 0, 0);
}
void Sierpinski::rule1(int i)
{
if (i == 0)
drawline();
else{
rule2(i - 1);
turnright();
rule1(i - 1);
turnright();
rule2(i - 1);
}
}
void Sierpinski::rule2(int i)
{
if (i == 0)
drawline();
else{
rule1(i - 1);
turnleft();
rule2(i - 1);
turnleft();
rule1(i - 1);
}
}
void L_system::start(int i)
{
rule1(i);
}
void L_system::offset(double x,double y, double z)
{
glTranslated(x, y, z);
}
void L_system::setlinewidth(double a)
{
width = a;
}
void Fern::rule1(int i)
{
if (i == 0)
;
else
{
rule2(i-1);
turnleft();
glPushMatrix();
glPushMatrix();
rule1(i-1);
glPopMatrix();
turnright();
rule1(i-1);
glPopMatrix();
turnright();
rule2(i - 1);
glPushMatrix();
turnright();
rule2(i - 1);
rule1(i - 1);
glPopMatrix();
turnleft();
rule1(i - 1);
}
}
void Fern::rule2(int i)
{
if (i == 0)
drawline();
else
{
rule2(i - 1);
rule2(i - 1);
}
}
void Simple_Tree::rule1(int i)
{
if (i == 0)
drawline();
else
{
rule2(i - 1);
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
turnright();
rule1(i - 1);
}
}
void Simple_Tree::rule2(int i)
{
if (i == 0)
drawline();
else
{
rule2(i - 1);
rule2(i - 1);
}
}
void Tree1::rule1(int i)
{
if (i == 0)
drawline();
else
{
rule1(i - 1);
rule1(i - 1);
turnright();
glPushMatrix();
turnright();
rule1(i - 1);
turnleft();
rule1(i - 1);
turnleft();
rule1(i - 1);
glPopMatrix();
turnleft();
glPushMatrix();
turnleft();
rule1(i - 1);
turnright();
rule1(i - 1);
turnright();
rule1(i - 1);
glPopMatrix();
}
}
void Tree1::rule2(int i)
{
}
void _3DTree::rule1(int i)
{
if (i == 0)
drawline();
else
{
rule1(i - 1);
glPushMatrix();
turnright();
pitchdown();
rollleft();
rule1(i - 1);
glPopMatrix();
glPushMatrix();
rollleft();
turnleft();
turnleft();
pitchdown();
rule1(i - 1);
glPopMatrix();
turnaround();
turnaround();
rule1(i - 1);
glPushMatrix();
turnright();
turnright();
pitchdown();
rollright();
rule1(i - 1);
glPopMatrix();
glPushMatrix();
turnleft();
pitchdown();
rule1(i - 1);
glPopMatrix();
}
}
void _3DTree::rule2(int i)
{
}
void _3DTree2::rule1(int i)
{
if (i == 0)
drawellipse(5,0,5,2);
else
{
glScaled(.6, .6, .6);
rule2(i - 1);
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
}
}
void _3DTree2::rule2(int i)
{
if (i == 0)
drawcylinder();
else
{
rule2(i - 1);
}
}
void _3DTree3::rule1(int i)
{
if (i == 0)
drawellipse(2, 0,2,1);
else
{
glScaled(.6, .6, .6);
rule2(i - 1);
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
}
}
void _3DTree3::rule2(int i)
{
if (i == 0)
drawcylinder();
else
{
rule2(i - 1);
}
}
void _3DTree4::rule1(int i)
{
if (i == 0)
drawellipse(2, 0, 2, 1);
else
{
glScaled(.9, .9, .9);
rule2(i - 1);
rule2(i - 1);
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rule2(i - 1);
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
rollleft();
rollleft();
glPushMatrix();
turnleft();
rule1(i - 1);
glPopMatrix();
}
}
void _3DTree4::rule2(int i)
{
if (i == 0)
drawcylinder();
else
{
rule2(i - 1);
}
}