void rebuildMatrices()
{
if (!needsRebuild)
{
return;
}
needsRebuild = false;
warp_Vector forward, up, right;
forward = warp_Vector.sub(lookat, pos);
if (Math.Abs(forward.x) < 0.001f && Math.Abs(forward.z) < 0.001f)
{
right = new warp_Vector(1f, 0f, 0f);
if (forward.y < 0)
{
up = new warp_Vector(0f, 0f, 1f);
}
else
{
up = new warp_Vector(0f, 0f, -1f);
}
}
else
{
up = new warp_Vector(0f, 1f, 0f);
right = warp_Vector.getNormal(up, forward);
up = warp_Vector.getNormal(forward, right);
}
forward.normalize();
normalmatrix = new warp_Matrix(right, up, forward);
if (rollfactor != 0)
{
normalmatrix.rotate(0, 0, rollfactor);
}
matrix = normalmatrix.getClone();
matrix.shift(pos.x, pos.y, pos.z);
matrix = matrix.inverse();
normalmatrix = normalmatrix.inverse();
if (isOrthographic)
{
projmatrix.m00 = screenwidth / orthoViewWidth;
projmatrix.m03 = halfscreenwidth;
projmatrix.m11 = -screenheight / orthoViewHeight;
projmatrix.m13 = halfscreenheight;
projmatrix.m22 = 1.0f;
}
else
{
float screenscale = (screenwidth < screenheight) ? screenwidth : screenheight;
projmatrix.m00 = screenscale / fovfact;
projmatrix.m03 = 0;
projmatrix.m11 = -screenscale / fovfact;
projmatrix.m13 = 0;
projmatrix.m22 = 1.0f;
}
matrix = warp_Matrix.multiply(projmatrix, matrix);
}
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);
}
public void shift(float dx, float dy, float dz)
{
matrix.shift(dx, dy, dz);
}