How to get glut working in Dev C++

If you are having trouble getting this program working in Dev C++ in Windows

Step 1: Follow these instructions:
http://www.astahost.com/info.php/installing-glut-dev-c_t14192.html

Step2:
Click File>New>Project
In the tabs across the top click "Multimedia" then click on the icon with the words glut under it.
Save the project file.
This creates a new project called "main.cpp"
You can run it and check it out if you want but then:
Click "Save As" and save the file but rename it simple. cpp
Then copy all of the code from the original simple.cpp and paste it over all the code in this file.
Comment out this line:
#include "../../shared/gltools.h"

use these two lines instead (I stole them from that main.cpp it created earlier):

#include <GL/glut.h>
#include <stdlib.h>

Now compile and run it. No really. Do it.

Transformations: Homework 4

Here is an image from the first part of Homework 4, rotating a triangle:


The Code:
int x1, x2, x3, y1, y2, y3;
Point p1, p2, p3, temp1, temp2, temp3, centroid;
float a,theta;

void setup()
{
size(720, 480);
background(0);
stroke(255);
p1=new Point(0, 0);
p2=new Point(0 ,0);
p3=new Point(0 ,0);
temp1=new Point(0, 0);
temp2=new Point(0 ,0);
temp3=new Point(0 ,0);
centroid=new Point(0 ,0);
a=90;
mousePressed();
}

void mousePressed()
{
background(0);
x1=int(random(720));
x2=int(random(720));
x3=int(random(720));
y1=int(random(480));
y2=int(random(480));
y3=int(random(480));

p1=new Point(x1,y1);
p2=new Point(x2 ,y2);
p3=new Point(x3 ,y3);

centroid = new Point((p1.x+p2.x+p3.x)/3,(p1.y+p2.y+p3.y)/3);

//move all points to the origin TEMPORARLILY
temp1=new Point(p1.x-centroid.x, p1.y-centroid.y);
temp2=new Point(p2.x-centroid.x, p2.y-centroid.y);
temp3=new Point(p3.x-centroid.x, p3.y-centroid.y);

}

void draw()
{
background(0);
frameRate(60);
stroke(255);
a = (mouseX / (float) width) * 360f;
// Convert it to radians
theta = radians(a);

//rotate the temporary points around the origin
p1=rotatePoint(temp1,theta);
p2=rotatePoint(temp2,theta);
p3=rotatePoint(temp3,theta);

//now move them back to OG location
p1=new Point(p1.x+centroid.x, p1.y+centroid.y);
p2=new Point(p2.x+centroid.x, p2.y+centroid.y);
p3=new Point(p3.x+centroid.x, p3.y+centroid.y);

//draw it
point(centroid.x, centroid.y);
myTri(p1,p2,p3);
}


void myTri(Point a, Point b, Point c)
{
line(a.x,a.y,b.x,b.y);
line(b.x,b.y,c.x,c.y);
line(c.x,c.y,a.x,a.y);
}


Point rotatePoint(Point p, float angle)
{
float[] coord = new float[3];
int[] newCoord= new int[3];
float[][] matrix= new float[3][3];
float c=cos(angle);
float s=sin(angle);
Point myPoint=new Point(0,0);

//setup the 3x1 matrix for the point
coord[0]=p.x;
coord[1]=p.y;
coord[2]=1;

//setup the 3x3 matrix for the rotation
matrix[0][0]=c;
matrix[0][1]=s;
matrix[0][2]=0;
matrix[1][0]=-s;
matrix[1][1]=c;
matrix[1][2]=0;
matrix[2][0]=0;
matrix[2][1]=0;
matrix[2][2]=1;

newCoord=matrixMult(matrix, coord);
myPoint.x=newCoord[0];
myPoint.y=newCoord[1];
return myPoint;

}

int[] matrixMult(float matA[][], float matB[])
{
float[] temp= new float[3];
int[] ntemp= new int[3];
temp[0]=0;
temp[1]=0;
temp[2]=0;
for(int i=0; i<3; j="0;" ntemp="int(temp);">

Here are some interesting images I made by rotating several randomly colored triangles, while changing the brightness each time the draw function ran:





The Code:
int x1, x2, x3, y1, y2, y3;
final int num=5;
Point[] p1=new Point[num];
Point[] p2=new Point[num];
Point[] p3=new Point[num];
Point[] temp1=new Point[num];
Point[] temp2=new Point[num];
Point[] temp3=new Point[num];
Point[] centroid=new Point[num];
int h=0;
int s=0;
int v=0;
color c=color(h, s, v);

float a,theta;

void setup()
{
size(720, 480);
background(0);
stroke(255);
colorMode(HSB, 255);
for(int i=0; i255)
v=0;
color c= color(h, s, v);
stroke(c);
point(centroid[i].x, centroid[i].y);
myTri(p1[i],p2[i],p3[i]);
}
}


void myTri(Point a, Point b, Point c)
{
line(a.x,a.y,b.x,b.y);
line(b.x,b.y,c.x,c.y);
line(c.x,c.y,a.x,a.y);
}


Point rotatePoint(Point p, float angle)
{
float[] coord = new float[3];
int[] newCoord= new int[3];
float[][] matrix= new float[3][3];
float c=cos(angle);
float s=sin(angle);
Point myPoint=new Point(0,0);

//setup the 3x1 matrix for the point
coord[0]=p.x;
coord[1]=p.y;
coord[2]=1;

//setup the 3x3 matrix for the rotation
matrix[0][0]=c;
matrix[0][1]=s;
matrix[0][2]=0;
matrix[1][0]=-s;
matrix[1][1]=c;
matrix[1][2]=0;
matrix[2][0]=0;
matrix[2][1]=0;
matrix[2][2]=1;

newCoord=matrixMult(matrix, coord);
myPoint.x=newCoord[0];
myPoint.y=newCoord[1];
return myPoint;

}

int[] matrixMult(float matA[][], float matB[])
{
float[] temp= new float[3];
int[] ntemp= new int[3];
temp[0]=0;
temp[1]=0;
temp[2]=0;
for(int i=0; i<3; j="0;" ntemp="int(temp);">

Finally here is another image I made using pushMatrix() and popMatrix();
They especially made it easy to return to the middle of the screen after each iteration of a loop:



The Code:

int h=0;
int s=0;
int v=0;
color c=color(h, s, v);
int scal=0;
int rot=0;

void setup(){
size(720, 480);
background(0,0,0);
colorMode(HSB, 255);
noLoop();
}

void draw(){
//just draw colored rectangles in each quadrant
randomColor();
rect(0,0,width/2, height/2);
randomColor();
rect(width/2, height/2,width/2, height/2);
randomColor();
rect(0,height/2,width/2, height/2);
randomColor();
rect(width/2,0,width/2, height/2);

//push Matrix, then move to middle of screen
pushMatrix();

translate(width/2, height/2);

for(int j=0; j<4; i="10;" j="0;" i="10;" h="int(random(200));" s="int(random(250));" v="int(random(255));" c="color(h,s,v);">

Homework 3

Part 1:
For the interactive Bezier Curve program, check the previous post.
Instead of showing a picture of my first program that drew triangles without clipping, here is a picture of the nearly finished program which first drew the complete triangles in green, then drew the clipped sections in red. I used this for debugging.
Here is a pic of the final version with fully implemented Cohen-Sutherland clipping:
Here is the code:

int x1, x2, x3, y1, y2, y3;
int xmax=(720/4)*3;
int xmin=720/4;
int ymax=(480/4)*3;
int ymin=480/4;

void draw(){
}

void setup() {
size(720, 480);
background(255,255,255);
stroke(0,0,255);
rect(xmin, ymin, 360,240);
stroke(0,0,0);
fiveTriangles();
}

void fiveTriangles(){
for(int i=0; i<5; i++){
x1=int(random(720));
x2=int(random(720));
x3=int(random(720));
y1=int(random(480));
y2=int(random(480));
y3=int(random(480));

Point p1=new Point(x1, y1);
Point p2=new Point(x2 ,y2);
Point p3=new Point(x3 ,y3);

myTri(p1, p2,p3);
}
}

void myTri(Point a, Point b, Point c){
stroke(0,255,0);
line(a.x,a.y,b.x,b.y);
line(b.x,b.y,c.x,c.y);
line(c.x,c.y,a.x,a.y);
stroke(255,0,0);

myLine(a,b);
myLine(b,c);
myLine(c,a);

}

void myLine(Point p1, Point p2){
int pCode=verify(p1);
int qCode=verify(p2);
if( (pCode & qCode)!=0 ) {
println("1) outside screen DONT DRAW");
}
else if( (pCode | qCode) == 0 )
{
line(p1.x, p1.y, p2.x, p2.y);
println("2) inside screen DRAW IT");
}
else
{
println("3) Gotta CLIP IT....");
clipLine(p1,p2);

}

}

void clipLine(Point P0, Point P1){
int outCode0=verify(P0);
int outCode1=verify(P1);
int x=P0.x;
int y=P0.y;
int x0=P1.x;
int y0=P1.y;

while((outCode0 | outCode1)!=0)
{
println("outCode0 | outCode1 = "+(outCode0 | outCode1)+"while loop");
//outCode0 = verify(P0);
//outCode1 = verify(P1);

if(outCode0 == 0)
{
println("switching P and Q");
Point tempPt; int tempCode;
tempPt = P0;
P0= P1;
P1 = tempPt;
tempCode = outCode0;
outCode0 = outCode1;
outCode1 = tempCode;
tempCode=x;
x=x0;
x0=tempCode;
tempCode=y;
y=y0;
y0=tempCode;
}
if( (outCode0 & 1) != 0 )
{
println("outCode0 & 1 = "+(outCode0 & 1)+"clip at BOTTOM");
x = P0.x + (P1.x - P0.x)*(ymax - P0.y)/(P1.y - P0.y);
y = ymax;
outCode0=verify(x,y);
}
else
if( (outCode0 & 2) != 0 )
{
println("outCode0 & 2 = "+(outCode0 & 2)+"clip at TOP");
x=P0.x + (P1.x - P0.x)*(ymin - P0.y)/(P1.y - P0.y);
y = ymin;
outCode0=verify(x,y);
}
else
if( (outCode0 & 4) != 0 )
{
println("outCode0 & 4 = "+(outCode0 & 4)+"clip at RIGHT");
y =P0.y + (P1.y - P0.y)*(xmax - P0.x)/(P1.x - P0.x);
x = xmax;
outCode0=verify(x,y);
}
else
if( (outCode0 & 8) != 0 )
{
println("outCode0 & 8 = "+(outCode0 & 8)+"clip at LEFT");
y = P0.y + (P1.y - P0.y)*(xmin - P0.x)/(P1.x - P0.x);
x = xmin;
outCode0=verify(x,y);
}
//outCode0 = verify(P0);
//outCode1 = verify(P1);
}
println("FINALLY clipping done, drawing line!!!");
line(x, y, x0, y0);
}

int verify(Point p)
{
int bits=0;
if(p.x bits +=8;
if(p.x>xmax)
bits +=4;
if(p.y bits +=2;
if(p.y>ymax)
bits +=1;

String s=binary(bits,4);
println(s);
return bits;
}

int verify(int x, int y)
{
int bits=0;
if(x bits +=8;
if(x>xmax)
bits +=4;
if(y bits +=2;
if(y>ymax)
bits +=1;

String s=binary(bits,4);
println(s);
return bits;
}



Part 2

For my project I propose a program that will create creatures that have a recognizable structure, but are also created using some random values so that no two would be alike. This concept could be taken further by making the program interactive, so that if you click on two of the creatures you would get a third creature that "inherits" characteristics of both. The creatures would be drawn using primitive lines, circles, curves etc but would be detailed enough to look good. Here is a picture of a NodeBox project called Aquatics which inspired this idea. I would want to implement it in Processing rather than NodeBox because I don't have a Mac. Click on the link to view the original project page.