All in one (draw hut)

All in one GL_QUADS ,GL_TRIANGLES,rotation,scaling and traslation:

we have discuss these all function in our first lesson. now we will discuss a example in which we use all these function we will draw a hut 

Draw hut:

                   first of all we will create the window for drawing that we have discuss it before in our first lesson in glutDisplayFun() we will call a function draw_hut()

void Draw_hut() {

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0, 0.0, 0.0);

//first of all will daraw triangle

glBegin(GL_TRIANGLES);

glVertex2f(0.20,0.95);

glVertex2f(0.15, 0.85);

glVertex2f(0.25,0.85);

glEnd();

//left rectangle in which we draw the door

glColor3f(0.0, 1.0, 0.0);

glBegin(GL_QUADS);

glVertex2f(0.15,0.85);

glVertex2f(0.15,0.60);

glVertex2f(0.25,0.60);

glVertex2f(0.25,0.85);

        glEnd();

//roof code

glColor3f(0.3, 0.2, 0.0);       

glBegin(GL_QUADS);

glVertex2f(0.20,0.95);

glVertex2f(0.50,0.95);

glVertex2f(0.55,0.85);

glVertex2f(0.25,0.85);

        glEnd();

//main portion in which in which we the window

glColor3f(1.0, 0.0, 0.0);

glBegin(GL_QUADS);

glVertex2f(0.25,0.85);

glVertex2f(0.25,0.60);

glVertex2f(0.55,0.60);

glVertex2f(0.55,0.85);

       glEnd();

//start bricks code

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);             //Horizontal Line

glVertex2f(0.215,0.92);

glVertex2f(0.515,0.92);

glEnd();

       glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.28,0.95);

glVertex2f(0.28,0.92);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.35,0.95);

glVertex2f(0.35,0.92);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.42,0.95);

glVertex2f(0.42,0.92);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.48,0.95);

glVertex2f(0.48,0.92);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);             // 2nd Horizontal Line

glVertex2f(0.230,0.89);

glVertex2f(0.527,0.89);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.26,0.92);

glVertex2f(0.26,0.89);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.33,0.92);

glVertex2f(0.33,0.89);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.40,0.92);

glVertex2f(0.40,0.89);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.47,0.92);

glVertex2f(0.47,0.89);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);             // 3rd Horizontal Line

glVertex2f(0.243,0.86);

glVertex2f(0.542,0.86);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.30,0.89);

glVertex2f(0.30,0.86);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.37,0.89);

glVertex2f(0.37,0.86);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.44,0.89);

glVertex2f(0.44,0.86);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.51,0.89);

glVertex2f(0.51,0.86);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.26,0.86);

glVertex2f(0.26,0.85);

glEnd();

glColor3f(1.0, 0.0, 1.0);

glBegin(GL_LINES);

glVertex2f(0.33,0.86);

glVertex2f(0.33,0.85);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.40,0.86);

glVertex2f(0.40,0.85);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.47,0.86);

glVertex2f(0.47,0.85);

glEnd();

glBegin(GL_LINES);

glVertex2f(0.53,0.86);

glVertex2f(0.53,0.85);

glEnd();

//end bricks code

//draw the door

glColor3f(0.0, 0.0, 0.0);

glBegin(GL_QUADS);         //Door

glVertex2f(0.15,0.70);

glVertex2f(0.15,0.60);

glVertex2f(0.20,0.6);

glVertex2f(0.20,0.70);

glEnd();

//draw the window

glColor3f(1.0, 1.0, 0.0);

glBegin(GL_QUADS);                  //window

glVertex2f(0.35,0.78);

glVertex2f(0.45,0.78);

glVertex2f(0.45,0.68);

glVertex2f(0.35,0.68);

        glEnd();

glFlush();

}

screen short:

Hut

now we apply the rotation,translation and scaling in hut for this we use the glrotatef() , glTranslatef(), and glscalef() function respectivly

we will add this function in our code so now code will be like this see below

code:

void Draw_hut() {

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0, 0.0, 0.0);

       glPushMatrix(); //Save the transformations performed thus far

glRotatef(-40.0, 0.0f, 0.0f, 1.0f);

glTranslatef(-0.40f, 0.0f, 0.0f);

    .

   ............... all hout code that is written above

.....................all hout code that is written above

.....................all hout code that is written above

.............................all hout code that is written above

...................................all hout code that is written above

...........................all hout code that is written above

//all hout code that is written above

.....................

.................................

...................................

......................................

glPopMatrix();

glFlush();

}

screen short:

After scaling ,rotation and translation

Get source code