//Coding for Sun
glLoadIdentity();
glBegin(GL_POLYGON);
glColor3ub(255.0f, 255.0f, 128.0f);
float angle10;
for (int i=0;i<360;i++)
{
angle10=i*3.1416/180;
glVertex2f(0.0+0.12*cos(angle10),0.9+0.12*sin(angle10));
}
glEnd();
//Coding for Moon
glLoadIdentity();
glBegin(GL_POLYGON);
glColor3ub(255, 255, 255);
GLfloat x5=.7f;
GLfloat y5=.7f;
GLfloat radius5 =.07f;
GLfloat twicePi5 = 2.0f * PI;
GLfloat triangleAmount5=100;
glBegin(GL_TRIANGLE_FAN);
glVertex2f(x5, y5); // center of circle
for(int i = 0; i <= triangleAmount5; i++)
{
glVertex2f(
x5 + (radius5 * cos(i * twicePi5 / triangleAmount5)),
y5 + (radius5 * sin(i * twicePi5 / triangleAmount5))
);
}
glEnd();
//Code for Airplane
glLoadIdentity();
glPushMatrix();
glScalef(0.4,0.4,0);
glTranslatef(0.0f,1.5f, 0.0f);
glTranslatef(position6, 0.0f, 0.0f);
glBegin(GL_POLYGON); // airplane outer body
glColor3ub(234, 229, 229); // white
glVertex2f(-0.3f, 0.2f);
glVertex2f(0.3f, 0.2f);
glVertex2f(0.4f, 0.3f);
glVertex2f(0.45f, 0.4f);
glVertex2f(0.45f, 0.5f);
glVertex2f(0.3f, 0.4f);
glVertex2f(0.0f, 0.4f);
glVertex2f(-0.2f, 0.4f);
glVertex2f(-0.3f, 0.4f);
glVertex2f(-0.35f, 0.38f);
glVertex2f(-0.4f, 0.3f);
glVertex2f(-0.35f, 0.23f);
glVertex2f(-0.3f, 0.2f);
glEnd();
glBegin(GL_POLYGON); // airplane front window
glColor3ub(117, 69, 160); // purple one
glVertex2f(-0.37f, 0.35f);
glVertex2f(-0.32f, 0.35f);
glVertex2f(-0.3f, 0.36f);
glVertex2f(-0.3f, 0.38f);
glVertex2f(-0.35f, 0.38f);
glEnd();
glBegin(GL_LINES); // airplane front window
glColor3ub(255, 255, 255); // white
glVertex2f(-0.35f, 0.35f);
glVertex2f(-0.33f, 0.38f);
glVertex2f(-0.33f, 0.35f);
glVertex2f(-0.31f, 0.38f);
glEnd();
glBegin(GL_LINES); // airplane front door
glColor3ub(144, 126, 181); // purple one
glVertex2f(-0.25f, 0.26f);
glVertex2f(-0.23f, 0.24f);
glVertex2f(-0.23f, 0.24f);
glVertex2f(-0.18f, 0.24f);
glVertex2f(-0.18f, 0.24f);
glVertex2f(-0.16f, 0.26f);
glVertex2f(-0.16f, 0.26f);
glVertex2f(-0.16f, 0.36f);
glVertex2f(-0.16f, 0.36f);
glVertex2f(-0.18f, 0.38f);
glVertex2f(-0.18f, 0.38f);
glVertex2f(-0.23f, 0.38f);
glVertex2f(-0.23f, 0.38f);
glVertex2f(-0.25f, 0.36f);
glVertex2f(-0.25f, 0.36f);
glVertex2f(-0.25f, 0.26f);
glEnd();
glBegin(GL_QUADS); // Airplane front wind
glColor3ub(117, 69, 160); // purple one
glVertex2f(0.02f, 0.15f);
glVertex2f(0.05f, 0.15f);
glVertex2f(-0.03f, 0.26f);
glVertex2f(-0.1f, 0.26f);
glEnd();
glBegin(GL_QUADS); // Airplane back wind
glColor3ub(117, 69, 160); // purple one
glVertex2f(-0.08f, 0.4f);
glVertex2f(0.0f, 0.4f);
glVertex2f(0.07f, 0.49f);
glVertex2f(0.04f, 0.49f);
glEnd();
// Airplane window
glColor3ub(117, 69, 160); // purple one
GLfloat x2=-0.09f;
GLfloat y2=0.35f;
GLfloat radius1 =.02f;
int triangleAmount1 = 100;
GLfloat twicePi1 = 2.0f * PI;
glBegin(GL_TRIANGLE_FAN);
glVertex2f(x2, y2); // center of circle
for(int i = 0; i <= triangleAmount1; i++)
{
glVertex2f(
x2 + (radius1 * cos(i * twicePi1 / triangleAmount1)),
y2 + (radius1 * sin(i * twicePi1 / triangleAmount1))
);
}
glEnd();
// Airplane window
glColor3ub(117, 69, 160); // purple one
GLfloat x3=-0.02f;
GLfloat y3=0.35f;
radius1 =.02f;
twicePi1 = 2.0f * PI;
glBegin(GL_TRIANGLE_FAN);
glVertex2f(x3, y3); // center of circle
for(int i = 0; i <= triangleAmount1; i++)
{
glVertex2f(
x3 + (radius1 * cos(i * twicePi1 / triangleAmount1)),
y3 + (radius1 * sin(i * twicePi1 / triangleAmount1))
);
}
glEnd();
// Airplane window
glColor3ub(117, 69, 160); // purple one
GLfloat x4=0.06f;
GLfloat y4=0.35f;
radius1 =.02f;
twicePi1 = 2.0f * PI;
glBegin(GL_TRIANGLE_FAN);
glVertex2f(x4, y4); // center of circle
for(int i = 0; i <= triangleAmount1; i++)
{
glVertex2f(
x4 + (radius1 * cos(i * twicePi1 / triangleAmount1)),
y4 + (radius1 * sin(i * twicePi1 / triangleAmount1))
);
}
glEnd();
glPopMatrix();
Code for Birds
glLoadIdentity();
glPushMatrix();
glTranslatef(position5,0.0f, 0.0f);
glBegin(GL_POLYGON);
glColor3ub(0.0, 0.0, 0.0);
float angle41;
for (int i=0;i<360;i++)
{
angle41=i*3.1416/180;
glVertex2f(0.8+0.04*cos(angle41),0.7+0.02*sin(angle41));
}
glEnd();
glBegin(GL_POLYGON);
glColor3ub(0.0, 0.0, 0.0);
float angle42;
for (int i=0;i<360;i++)
{
angle42=i*3.1416/180;
glVertex2f(0.75+0.02*cos(angle42),0.71+0.02*sin(angle42));
}
glEnd();
glBegin(GL_POLYGON);
glColor3ub(255.0, 255.0, 255.0);
float angle43;
for (int i=0;i<360;i++)
{
angle43=i*3.1416/180;
glVertex2f(0.74+0.005*cos(angle43),0.71+0.005*sin(angle43));
}
glEnd();
//wing
glBegin(GL_TRIANGLES);
glColor3ub(255.0, 255.0, 255.0);
glVertex2f(0.8f,0.75f);
glVertex2f(0.79,0.71f);
glVertex2f(0.785f,0.8f);
glEnd();
//lip
glBegin(GL_TRIANGLES);
glColor3ub(255.0, 0.0, 0.0);
glVertex2f(0.73f,0.72f);
glVertex2f(0.69f,0.71f);
glVertex2f(0.73f,0.70f);
glEnd();
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cout << "Enter name:";
getline (cin, name);
cout << "Hello " << name;
return 0;
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C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
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}
else {
//code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression){
case value1:
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break; // optional
case value2:
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break; // optional
......
default:
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For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
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While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
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do {
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Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}