//----------------------------------------------------------------------------
void Rope::CreateRope ()
{
// Create a quadratic spline using particles as control points.
int numCtrlPoints = mModule->GetNumParticles();
Vector3f* ctrlPoints = mModule->Positions();
const int degree = 2;
mSpline = new0 BSplineCurve3f(numCtrlPoints, ctrlPoints, degree, false,
true);
// Generate a tube surface whose medial axis is the spline.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
Float2 tcoordMin(0.0f, 0.0f), tcoordMax(1.0f, 1.0f);
mRope = new0 TubeSurface(mSpline, Radial, false, Vector3f::UNIT_Z, 64, 8,
false, false, &tcoordMin, &tcoordMax, vformat);
// Attach a texture for the rope.
std::string path = Environment::GetPathR("Rope.wmtf");
Texture2D* texture = Texture2D::LoadWMTF(path);
mRope->SetEffectInstance(Texture2DEffect::CreateUniqueInstance(texture,
Shader::SF_LINEAR_LINEAR, Shader::SC_REPEAT, Shader::SC_REPEAT));
mTrnNode->AttachChild(mRope);
}
//----------------------------------------------------------------------------
void WrigglingSnake::CreateSnakeBody ()
{
// Create the B-spline curve for the snake body.
Vector3f* ctrlPoints = new1<Vector3f>(mNumCtrlPoints);
int i;
for (i = 0; i < mNumCtrlPoints; ++i)
{
// Control points for a snake.
float ratio = ((float)i)/(float)(mNumCtrlPoints - 1);
float x = -1.0f + 2.0f*ratio;
float xMod = 10.0f*x - 4.0f;
ctrlPoints[i].X() = x;
ctrlPoints[i].Y() = msRadius*(1.5f + Mathf::ATan(xMod)/Mathf::PI);
ctrlPoints[i].Z() = 0.0f;
// Sinusoidal motion for snake.
mAmplitudes[i] = 0.1f + ratio*Mathf::Exp(-ratio);
mPhases[i] = 1.5f*ratio*Mathf::TWO_PI;
}
// The control points are copied by the curve objects.
mCenter = new0 BSplineCurve3f(mNumCtrlPoints, ctrlPoints, mDegree, false,
true);
delete1(ctrlPoints);
// Generate a tube surface.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
Float2 tcoordMin(0.0f, 0.0f), tcoordMax(1.0f, 16.0f);
mSnakeBody = new0 TubeSurface(mCenter, Radial, false, Vector3f::UNIT_Y,
128, 32, false, false, &tcoordMin, &tcoordMax, vformat);
// Attach a texture to the snake body.
std::string path = Environment::GetPathR("Snake.wmtf");
Texture2D* texture = Texture2D::LoadWMTF(path);
mSnakeBody->SetEffectInstance(Texture2DEffect::CreateUniqueInstance(
texture, Shader::SF_LINEAR_LINEAR, Shader::SC_REPEAT,
Shader::SC_REPEAT));
mSnakeRoot->AttachChild(mSnakeBody);
}