Directional and orientation problem
- by Ahmed Saleh
I have drawn 5 tentacles which are shown in red. I have drew those tentacles on a 2D Circle, and positioned them on 5 vertices of the that circle. BTW, The circle is never be drawn, I have used it to simplify the problem. Now I wanted to attached that circle with tentacles underneath the jellyfish. There is a problem with the current code but I don't know what is it.
You can see that the circle is parallel to the base of the jelly fish. I want it to be shifted so that it be inside the jelly fish. but I don't know how. I tried to multiply the direction vector to extend it but that didn't work.
// One tentacle is constructed from nodes
// Get the direction of the first tentacle's node 0 to node 39 of that tentacle;
Vec3f dir = m_tentacle[0]->geNodesPos()[0] - m_tentacle[0]->geNodesPos()[39];
// Draw the circle with tentacles on it
Vec3f pos = m_SpherePos;
drawCircle(pos,dir,30,m_tentacle.size());
for (int i=0; i<m_tentacle.size(); i++)
{
m_tentacle[i]->Draw();
}
// Draw the jelly fish, and orient it on the 2D Circle
gl::pushMatrices();
Quatf q;
// assign quaternion to rotate the jelly fish around the tentacles
q.set(Vec3f(0,-1,0),Vec3f(dir.x,dir.y,dir.z));
// tanslate it to the position of the whole creature per every frame
gl::translate(m_SpherePos.x,m_SpherePos.y,m_SpherePos.z);
gl::rotate(q);
// draw the jelly fish at center 0,0,0
drawHemiSphere(Vec3f(0,0,0),m_iRadius,90);
gl::popMatrices();
