OpenGL 2D rotation problem?

Try rotating on the Z axis instead of the Y axis: Program to create a house like figure and rotate ir about a given fixed point using OpenGL functions. #include float house 112 = {{100,200},{200,250},{300,200},{100,200},{100,100},{175,100},{175,150},{225,150},{225,100},{300,100},{300,200}}; void display() { glClearColor(1,1,1,0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0,800,0,800); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //NORMAL HOUSE glColor3f(1,0,0); glBegin(GL_LINE_LOOP); for(int i=0;i.

Try rotating on the Z axis instead of the Y axis: //Program to create a house like figure and rotate ir about a given fixed point using OpenGL functions. #include float house 112 = {{100,200},{200,250},{300,200},{100,200},{100,100},{175,100},{175,150},{225,150},{225,100},{300,100},{300,200}}; void display() { glClearColor(1,1,1,0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluOrtho2D(0,800,0,800); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //NORMAL HOUSE glColor3f(1,0,0); glBegin(GL_LINE_LOOP); for(int i=0;i.

The above modification displays the output. But it doesnot rotate the house about its bottom left corner which is at 100,100. So I tried this: glTranslatef(-100,-100,0); glRotatef(30,0,0,1); glTranslatef(100,100,0); But stil it doesn't work.

Why? – footy May 10 at 13:46 1 @footy: Edited. Looks like those transforms were in the wrong order.

– genpfault May 10 at 18:09.

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