gluCylinder?
Hello I am brand new to opengl. I am trying to draw an upright cylinder to make it look like a cup. It seems to draw as though I were looking down the top of the cylinder. I have tried changing the rotation angle but nothing changes. I can't even move the cup around. I have an idea of how most of this work but not total comprehension. Thank you! This is what I have:
glTranslatef(0.0f,0.0f,-6.0f);
glBegin(GL_QUADS);
GLUquadric *quadric = gluNewQuadric();
glPushMatrix(); //save first position
//Draw the cylinder
glTranslatef(0.0f, -1.0f, 0.0f);
glPushMatrix();
glRotatef(45.0f, 1.0f, 0.0f, 0.f); //cylinder rotation
glTranslatef(-1.5f,0.0f,0.0f);
glRotatef(90.0f, 0.0f, 1.0f, 0.0f);
gluCylinder(quadric, 1.0f, 1.0f, 1.0f, 40, 40);
glPopMatrix();
glEnd();
OpenGL draws the cylinder about the Z direction for the tip, so in your rotations and translations your not doing anything with the Z axis. Try rotating about the Z axis by doing glRotate(degree (whatever you want), dx , dy, dz(change to 1));
Also double check your calls with the rotation and translation because normally the convention when doing a translation and rotation is this:
glTranslate(dx, dy, dz);
glRotate(angle, dx, dy, dz);
glTranslate(-dx, -dy, -dz);
/* object code */
Also double check your calls with the rotation and translation because normally the convention when doing a translation and rotation is this:
glTranslate(dx, dy, dz);
glRotate(angle, dx, dy, dz);
glTranslate(-dx, -dy, -dz);
/* object code */
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