C++ openGL #10: Draw Triangle

Bismillahir Rahmanir Rahim

Assalamualaikum everyone!! 

_________________________________

Now i'm showing you how draw the Triangle in openGL C++. Its  so easy tutorial just for beginners and basic concept of graph.

Let's enjoy!

>>>Now Create a new project-----

initialize the graph

void Initialize() {
 glClearColor(0, 0, 0, 1.0);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 glOrtho(-10.0, 10.0, -10.0, 10.0, -10.0, 10.0);
}

glOrtho(-10.0, 10.0, -10.0, 10.0, -10.0, 10.0);

this method,

Declare a 10x10 graph like below ___

Now write code for draw object or lines

At first draw a graph like this one:

Now just put the value on your program between glBegain and glEnd.

when put the vertex on your program you mast follow a sequence  right to left or left to right like this

v0->v1->v2->

or

v2->v1->v0

void Draw() {
 glClear(GL_COLOR_BUFFER_BIT);
 glColor3d(0,0,0);
 glBegin(GL_TRIANGLES);
    glVertex2f(-7.0,3.0);
    glVertex2f(7.0,-5.0);
    glVertex2f(-7.0,-5.0);
 glEnd();
 glFlush();
}

For more clarification download source file:

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