//----------------------------------------------------------------------------
Polypoint* FoucaultPendulum::CreatePath ()
{
// Points used to display path of pendulum.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
const int numPoints = 8192;
VertexBuffer* vbuffer = new0 VertexBuffer(numPoints, vstride);
VertexBufferAccessor vba(vformat, vbuffer);
Float3 zero(0.0f, 0.0f, 0.0f);
Float3 white(1.0f, 1.0f, 1.0f);
for (int i = 0; i < numPoints; ++i)
{
vba.Position<Float3>(i) = zero;
vba.Color<Float3>(0, i) = white;
}
mPath = new0 Polypoint(vformat, vbuffer);
mPath->SetNumPoints(1);
mNextPoint = 0;
mColorDiff = 1.0f/(float)numPoints;
mPath->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
return mPath;
}
//----------------------------------------------------------------------------
void PointSystems::CreateScene ()
{
mScene = new0 Node();
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
VertexBuffer* vbuffer = new0 VertexBuffer(1024, vstride);
VertexBufferAccessor vba(vformat, vbuffer);
for (int i = 0; i < vba.GetNumVertices(); ++i)
{
vba.Position<Float3>(i) = Float3(Mathf::SymmetricRandom(),
Mathf::SymmetricRandom(), Mathf::SymmetricRandom());
vba.Color<Float3>(0, i) = Float3(Mathf::UnitRandom(),
Mathf::UnitRandom(), Mathf::UnitRandom());
}
Polypoint* points = new0 Polypoint(vformat, vbuffer);
points->AttachController(new0 RandomController());
points->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
mScene->AttachChild(points);
}
//----------------------------------------------------------------------------
void PointInPolyhedron::CreateScene ()
{
mScene = new0 Node();
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
// Create a semitransparent sphere mesh.
VertexFormat* vformatMesh = VertexFormat::Create(1,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0);
TriMesh* mesh = StandardMesh(vformatMesh).Sphere(16, 16, 1.0f);
Material* material = new0 Material();
material->Diffuse = Float4(1.0f, 0.0f, 0.0f, 0.25f);
VisualEffectInstance* instance = MaterialEffect::CreateUniqueInstance(
material);
instance->GetEffect()->GetAlphaState(0, 0)->BlendEnabled = true;
mesh->SetEffectInstance(instance);
// Create the data structures for the polyhedron that represents the
// sphere mesh.
CreateQuery(mesh);
// Create a set of random points. Points inside the polyhedron are
// colored white. Points outside the polyhedron are colored blue.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
VertexBuffer* vbuffer = new0 VertexBuffer(1024, vstride);
VertexBufferAccessor vba(vformat, vbuffer);
Float3 white(1.0f, 1.0f, 1.0f);
Float3 blue(0.0f, 0.0f, 1.0f);
for (int i = 0; i < vba.GetNumVertices(); ++i)
{
Vector3f random(Mathf::SymmetricRandom(),
Mathf::SymmetricRandom(), Mathf::SymmetricRandom());
vba.Position<Vector3f>(i) = random;
if (mQuery->Contains(random))
{
vba.Color<Float3>(0, i) = white;
}
else
{
vba.Color<Float3>(0, i) = blue;
}
}
DeleteQuery();
mPoints = new0 Polypoint(vformat, vbuffer);
mPoints->SetEffectInstance(VertexColor3Effect::CreateUniqueInstance());
mScene->AttachChild(mPoints);
mScene->AttachChild(mesh);
}
