void TracerSceneNode::move(const GLfloat pos[3],
const GLfloat forward[3])
{
const GLfloat d = 1.0f / sqrtf(forward[0] * forward[0] +
forward[1] * forward[1] +
forward[2] * forward[2]);
azimuth = 180.0f / M_PI * atan2f(forward[1], forward[0]);
elevation = -180.0f / M_PI * atan2f(forward[2], hypotf(forward[0],forward[1]));
setCenter(pos[0] - 0.5f * TailLength * d * forward[0],
pos[1] - 0.5f * TailLength * d * forward[1],
pos[2] - 0.5f * TailLength * d * forward[2]);
light.setPosition(getSphere());
}
void SphereSceneNode::addRenderNodes(
SceneRenderer& renderer)
{
const GLfloat* sphere = getSphere();
const ViewFrustum& view = renderer.getViewFrustum();
const float size = sphere[3] * view.getAreaFactor() /
getDistance(view.getEye());
const int lod = (size < 100.0f) ? 0 : 1;
renderNode.setHighResolution(lod != 0);
const GLfloat* eye = view.getEye();
const float azimuth = atan2f(sphere[1] - eye[1], eye[0] - sphere[0]);
const int numSlices = (lod == 1) ? NumSlices : SphereLowRes;
renderNode.setBaseIndex(int(float(numSlices) *
(1.0f + 0.5f * azimuth / M_PI)) % numSlices);
renderer.addRenderNode(&renderNode, &gstate);
}
AxialBox Extent::getBoundingBox ( void ) const
{
return Containment3d::EncloseABox(getSphere());
}
Sphere Extent::getBoundingSphere ( void ) const
{
return getSphere();
}
BaseExtent * Extent::clone ( void ) const
{
return new Extent( getSphere() );
}
