void rebuildMatrices()
{
if (!needsRebuild)
{
return;
}
needsRebuild = false;
warp_Vector forward, up, right;
forward = warp_Vector.sub(lookat, pos);
up = new warp_Vector(0f, 1f, 0f);
right = warp_Vector.getNormal(up, forward);
up = warp_Vector.getNormal(forward, right);
forward.normalize();
up.normalize();
right.normalize();
normalmatrix = new warp_Matrix(right, up, forward);
normalmatrix.rotate(0, 0, rollfactor);
matrix = normalmatrix.getClone();
matrix.shift(pos.x, pos.y, pos.z);
normalmatrix = normalmatrix.inverse();
matrix = matrix.inverse();
}
public static warp_Object TUBE(warp_Vector[] path, float r, int steps, bool closed)
{
warp_Vector[] circle = new warp_Vector[steps];
float angle;
for (int i = 0; i < steps; i++)
{
angle = 2 * 3.14159265f * (float)i / (float)steps;
circle [i] = new warp_Vector(r * warp_Math.cos(angle),
r * warp_Math.sin(angle), 0f);
}
warp_Object newObject = new warp_Object();
int segments = path.GetLength(0);
warp_Vector forward, up, right;
warp_Matrix frenetmatrix;
warp_Vertex tempvertex;
float relx, rely;
int a, b, c, d;
for (int i = 0; i < segments; i++)
{
// Calculate frenet frame matrix
if (i != segments - 1)
{
forward = warp_Vector.sub(path [i + 1], path [i]);
}
else
{
if (!closed)
{
forward = warp_Vector.sub(path [i], path [i - 1]);
}
else
{
forward = warp_Vector.sub(path [1], path [0]);
}
}
forward.normalize();
up = new warp_Vector(0f, 0f, 1f);
right = warp_Vector.getNormal(forward, up);
up = warp_Vector.getNormal(forward, right);
frenetmatrix = new warp_Matrix(right, up, forward);
frenetmatrix.shift(path [i].x, path [i].y, path [i].z);
// Add nodes
relx = (float)i / (float)(segments - 1);
for (int k = 0; k < steps; k++)
{
rely = (float)k / (float)steps;
tempvertex = new warp_Vertex(circle [k].transform(frenetmatrix));
tempvertex.u = relx;
tempvertex.v = rely;
newObject.addVertex(tempvertex);
}
}
for (int i = 0; i < segments - 1; i++)
{
for (int k = 0; k < steps - 1; k++)
{
a = i * steps + k;
b = a + 1;
c = a + steps;
d = b + steps;
newObject.addTriangle(a, c, b);
newObject.addTriangle(b, c, d);
}
a = (i + 1) * steps - 1;
b = a + 1 - steps;
c = a + steps;
d = b + steps;
newObject.addTriangle(a, c, b);
newObject.addTriangle(b, c, d);
}
return(newObject);
}
void rebuildMatrices ()
{
if (!needsRebuild)
return;
needsRebuild = false;
warp_Vector forward, up, right;
forward = warp_Vector.sub (lookat, pos);
up = new warp_Vector (0f, 1f, 0f);
right = warp_Vector.getNormal (up, forward);
up = warp_Vector.getNormal (forward, right);
forward.normalize ();
up.normalize ();
right.normalize ();
normalmatrix = new warp_Matrix (right, up, forward);
normalmatrix.rotate (0, 0, rollfactor);
matrix = normalmatrix.getClone ();
matrix.shift (pos.x, pos.y, pos.z);
normalmatrix = normalmatrix.inverse ();
matrix = matrix.inverse ();
}
public static warp_Object TUBE (warp_Vector[] path, float r, int steps, bool closed)
{
warp_Vector[] circle = new warp_Vector[steps];
float angle;
for (int i = 0; i < steps; i++)
{
angle = 2 * 3.14159265f * (float)i / (float)steps;
circle [i] = new warp_Vector (r * warp_Math.cos (angle),
r * warp_Math.sin (angle), 0f);
}
warp_Object newObject = new warp_Object ();
int segments = path.GetLength (0);
warp_Vector forward, up, right;
warp_Matrix frenetmatrix;
warp_Vertex tempvertex;
float relx, rely;
int a, b, c, d;
for (int i = 0; i < segments; i++)
{
// Calculate frenet frame matrix
if (i != segments - 1)
{
forward = warp_Vector.sub (path [i + 1], path [i]);
} else
{
if (!closed)
{
forward = warp_Vector.sub (path [i], path [i - 1]);
} else
{
forward = warp_Vector.sub (path [1], path [0]);
}
}
forward.normalize ();
up = new warp_Vector (0f, 0f, 1f);
right = warp_Vector.getNormal (forward, up);
up = warp_Vector.getNormal (forward, right);
frenetmatrix = new warp_Matrix (right, up, forward);
frenetmatrix.shift (path [i].x, path [i].y, path [i].z);
// Add nodes
relx = (float)i / (float)(segments - 1);
for (int k = 0; k < steps; k++)
{
rely = (float)k / (float)steps;
tempvertex = new warp_Vertex (circle [k].transform (frenetmatrix));
tempvertex.u = relx;
tempvertex.v = rely;
newObject.addVertex (tempvertex);
}
}
for (int i = 0; i < segments - 1; i++)
{
for (int k = 0; k < steps - 1; k++)
{
a = i * steps + k;
b = a + 1;
c = a + steps;
d = b + steps;
newObject.addTriangle (a, c, b);
newObject.addTriangle (b, c, d);
}
a = (i + 1) * steps - 1;
b = a + 1 - steps;
c = a + steps;
d = b + steps;
newObject.addTriangle (a, c, b);
newObject.addTriangle (b, c, d);
}
return newObject;
}