Vector4 — Aspose.3D FOSS for Java
Example
Vector4 er en dobbeltpræcisions 4-komponent vektor. Det er lagringstypen for mesh‑kontrolpunkter (hvor w = 1.0 for positioner) og for normaldata i VertexElementNormal lag (hvor w er ubrugt).
Example: com.aspose.threed
import com.aspose.threed.*;
Vector4 point = new Vector4(1.0, 2.0, 3.0, 1.0);Example
| Example | Example |
|---|---|
Vector4() | Example (0, 0, 0, 1) |
Vector4(double x, double y, double z, double w) | Konstruerer fra fire komponenter |
Vector4(double x, double y, double z) | Konstruerer med w = 1.0 |
Vector4(Vector3 v3) | Konstruerer fra en Vector3 med w = 1.0 |
Vector4(Vector4 other) | Kopikonstruktor |
Offentlige felter
Vector4 bruger offentlige felter til komponentadgang (ikke getter/setter‑metoder):
| Example | Example | Example | Example |
|---|---|---|---|
x | double | v.x | X‑komponent |
y | double | v.y | Y‑komponent |
z | double | v.z | Z‑komponent |
w | double | v.w | W‑komponent (homogen koordinat) |
Example
| Example | Returntype | Example |
|---|---|---|
set(double x, double y, double z, double w) | void | Sætter alle fire komponenter |
toVector3() | Vector3 | Returnerer en Vector3(x, y, z) dropper den w komponent |
Example
import com.aspose.threed.*;
Mesh mesh = new Mesh();
// Add control points (w=1.0 for positions)
mesh.getControlPoints().add(new Vector4(0.0, 0.0, 0.0, 1.0));
mesh.getControlPoints().add(new Vector4(1.0, 0.0, 0.0, 1.0));
mesh.getControlPoints().add(new Vector4(0.5, 1.0, 0.0, 1.0));
mesh.createPolygon(0, 1, 2);
// Convert to Vector3
Vector4 v4 = new Vector4(1.0, 2.0, 3.0, 1.0);
Vector3 v3 = v4.toVector3(); // Vector3(1.0, 2.0, 3.0)
// Construct from Vector3
Vector3 pos = new Vector3(5.0, 0.0, 0.0);
Vector4 homogeneous = new Vector4(pos); // w = 1.0