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Golden Rectangle!

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#1sweeneyt0dd  Members   -  Reputation: 97

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Posted 25 October 2013 - 10:51 AM

Hello guys.I need help.Really.. I have homework about golden rectangle.I didn't know anything about this homework.If i won't do this i won't pass this lesson just help me please.

I need golden rectangle codes in opengl

I ATTACHED MY HOMEWORK

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Edited by sweeneyt0dd, 25 October 2013 - 11:53 AM.

#2haegarr  Crossbones+   -  Reputation: 7158

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Posted 25 October 2013 - 11:37 AM

Forum rules are quite clear about homework: Its your job to do it! We may help, but we don't solve it for you. So ... what is your problem in detail? Understanding the golden ratio? Understanding the assignment text? Knowledge of OpenGL? Knowledge of GLUT?

(Is this sentence complete?) What have you done / tried so far?

#3sweeneyt0dd  Members   -  Reputation: 97

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Posted 25 October 2013 - 11:52 AM

Forum rules are quite clear about homework: Its your job to do it! We may help, but we don't solve it for you. So ... what is your problem in detail? Understanding the golden ratio? Understanding the assignment text? Knowledge of OpenGL? Knowledge of GLUT?

(Is this sentence complete?) What have you done / tried so far?

dude..I'm new in this lesson in class.Just want golden rectangle codes likes

#include "stdafx.h"
#include <glut.h>
#include <math.h>

GLfloat G = (1 + (sqrt(float (5))))/2;

GLfloat gla1 = 0;
GLfloat glb1 = 0;
GLfloat gla2;
GLfloat glb2;

bool flip = true;

void genNextRect(void)
{
if (flip == false)
{
gla2 = gla2;
glb2 = gla2/G;

}
else
{
glb2 = glb2;
gla2 = gla2/G;

}
}

void init(void)
{
glClearColor(1.0, 1.0, 1.0, 0.0);
glMatrixMode(GL_PROJECTION);
glOrtho(0.0, 600.0, 0.0, 400.0, -15.0, 15.0);

glMatrixMode(GL_MODELVIEW);
}

void display()
{
glClear(GL_COLOR_BUFFER_BIT);
glLineWidth(4.0);

gla2 = glutGet(GLUT_WINDOW_WIDTH) - 10;
glb2 = glutGet(GLUT_WINDOW_HEIGHT) - 10;

glBegin(GL_LINE_LOOP);
glColor3f(0, 0, 1);
glVertex3f(gla1, glb1, 0);
glVertex3f(gla1, glb2, 0);
glVertex3f(gla2, glb2, 0);
glVertex3f(gla2, glb1, 0);
glEnd();
glutSwapBuffers();
}

void myReshape(GLsizei w, GLsizei h)
{
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
gluOrtho2D(0.0, w, 0.0, h);
}

int main (int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowPosition(50, 50);
glutInitWindowSize(600, 500);
glutCreateWindow("");
glutDisplayFunc(display);
glutReshapeFunc(myReshape);
init();
glutMainLoop();

}

#4fastcall22  Moderators   -  Reputation: 9549

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Posted 25 October 2013 - 11:54 AM

If i won't do this i won't pass this lesson just help me please.

... >_>

At this rate, how do you expect to complete the course?
gzip: H4sIAAAAAAAEAG1QTUvEMBC991e8nvaiFfYoS7yo sLCo6MnjtJ1ugmkiyWRL/72z3T1YEQIJ8z4zA2Xp yPvt1qBpGrRFIJZkk9FyRyUzHCbKIHgn4hnZOrm1 TD0mG0HCCs+QGDGWziKXI6Wm2n++GYwUVH2mrGEE PnGCVQ8K8+JYfXA6URDEQfMZh5h6g5eoAlWJdeEI bbH2qYZf7XMUfw8f/Q0oMeZYNL9/WHF0uFEshvMr XYujd9SycFb+F18QcSOvlJauZ8ejqevdnV7/d550 e0t6prmunh73Bu+vz4c/XUeOQXfJgvKNkhf95U8/ Dtgmy5IBAAA=

#5sweeneyt0dd  Members   -  Reputation: 97

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Posted 25 October 2013 - 11:58 AM

If i won't do this i won't pass this lesson just help me please.

... >_>

At this rate, how do you expect to complete the course?

You are right what u want to say.But you don't know why i don't understand nothing this lesson.I didn't go lessons because my family problems. I'm sorry buti just want a help thats all

#6fastcall22  Moderators   -  Reputation: 9549

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Posted 25 October 2013 - 12:38 PM

Okay, don't panic. It's simpler than it looks. Looking at genNextRect, it takes the width and height of a rectangle as global parameters, gla2 and glb2, and sets them to the next smallest golden rectangle. Note, genNextRect assumes the gla2 and glb are already a golden rectangle. This is done by taking one of the dimensions and dividing by the golden ratio, which will result in a smaller length. The flip flag determine which dimension to shorten. It is the side with the longest length that is shortened. You will need to keep track of flip such that, when genNextRect is called, that the longest length of the rectangle is shortened. Alternatively, you could remove flip entirely and change the condition in genNextRect to select the longer edge. You may want to check that your rectangle's aspect ratio matches (or is close enough to) the golden ratio after calling genNextRect.

After you have called genNextRect you will need to draw it as demonstrated in the glBegin/glEnd block in display. The assignment requires you continue drawing rectangles until the rectangles are too small to display. So, all that's left to complete the assignment is finding the first golden rectangle in the screen and a loop that calls genNextRect and draws the new rectangle until the rectangle is too small to display.

P.S.
Don't panic.
Spoiler

Edited by fastcall22, 25 October 2013 - 12:54 PM.

gzip: H4sIAAAAAAAEAG1QTUvEMBC991e8nvaiFfYoS7yo sLCo6MnjtJ1ugmkiyWRL/72z3T1YEQIJ8z4zA2Xp yPvt1qBpGrRFIJZkk9FyRyUzHCbKIHgn4hnZOrm1 TD0mG0HCCs+QGDGWziKXI6Wm2n++GYwUVH2mrGEE PnGCVQ8K8+JYfXA6URDEQfMZh5h6g5eoAlWJdeEI bbH2qYZf7XMUfw8f/Q0oMeZYNL9/WHF0uFEshvMr XYujd9SycFb+F18QcSOvlJauZ8ejqevdnV7/d550 e0t6prmunh73Bu+vz4c/XUeOQXfJgvKNkhf95U8/ Dtgmy5IBAAA=

#7sweeneyt0dd  Members   -  Reputation: 97

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Posted 25 October 2013 - 01:00 PM

Okay, don't panic. It's simpler than it looks. Looking at genNextRect, it takes the width and height of a rectangle as global parameters, gla2 and glb2, and sets them to the next smallest golden rectangle. Note, genNextRect assumes the gla2 and glb are already a golden rectangle. This is done by taking one of the dimensions and dividing by the golden ratio, which will result in a smaller length. The flip flag determine which dimension to shorten. It is the side with the longest length that is shortened. You will need to keep track of flip such that, when genNextRect is called, that the longest length of the rectangle is shortened. Alternatively, you could remove flip entirely and change the condition in genNextRect to select the longer edge. You may want to check that your rectangle's aspect ratio matches (or is close enough to) the golden ratio after calling genNextRect.

After you have called genNextRect you will need to draw it as demonstrated in the glBegin/glEnd block in display. The assignment requires you continue drawing rectangles until the rectangles are too small to display. So, all that's left to complete the assignment is finding the first golden rectangle in the screen and a loop that calls genNextRect and draws the new rectangle until the rectangle is too small to display.

P.S.
Don't panic.

Spoiler

thank you very much. I will do this with your help

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