Bismillahir Rahmanir Rahim
Assalamualaikum everyone!!
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Now i'm showing you how draw the Polygon 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->v3->v4
or
v4->v3->v2->v1->v0
And the main deference between Line loop and polygon: polygon fill with solid color ,on the other hand line loop only draw a line.
void Draw() { glClear(GL_COLOR_BUFFER_BIT); glColor3d(255,0,0); glBegin(GL_POLYGON); glVertex2f(0.0,0.0); glVertex2f(5.0,2.0); glVertex2f(2.0,-5.0); glVertex2f(-0.5,-0.5); glVertex2f(-5.0,-2.0); glVertex2f(-3.0,6.0); glEnd(); glFlush(); }
For more clarification download source file:
