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 static warp_Object ROTATIONOBJECT(warp_Vector[] path, int sides) { int steps = sides + 1; warp_Object newObject = new warp_Object(); double alpha = 2 * pi / ( (double) steps - 1); float qx, qz; int nodes = path.GetLength(0); warp_Vertex vertex = null; float u, v; // Texture coordinates for (int j = 0; j < steps; j++) { u = (float) (steps - j - 1) / (float) (steps - 1); for (int i = 0; i < nodes; i++) { v = (float) i / (float) (nodes - 1); qx = (float) (path[i].x * Math.Cos(j * alpha) + path[i].z * Math.Sin(j * alpha)); qz = (float) (path[i].z * Math.Cos(j * alpha) - path[i].x * Math.Sin(j * alpha)); vertex = new warp_Vertex(qx, path[i].y, qz); vertex.u = u; vertex.v = v; newObject.addVertex(vertex); } } for (int j = 0; j < steps - 1; j++) { for (int i = 0; i < nodes - 1; i++) { newObject.addTriangle(i + nodes * j, i + nodes * (j + 1), i + 1 + nodes * j); newObject.addTriangle(i + nodes * (j + 1), i + 1 + nodes * (j + 1), i + 1 + nodes * j); } } for (int i = 0; i < nodes - 1; i++) { newObject.addTriangle(i + nodes * (steps - 1), i, i + 1 + nodes * (steps - 1)); newObject.addTriangle(i, i + 1, i + 1 + nodes * (steps - 1)); } return newObject; }