vector3f.java

来自「NeHe用java与OpenGL结合教程源码」· Java 代码 · 共 27 行

package demos.nehe.lesson48;

/**
 * Created by IntelliJ IDEA.
 * User: pepijn
 * Date: Aug 7, 2005
 * Time: 5:45:22 PM
 * To change this template use File | Settings | File Templates.
 */
class Vector3f {
    public float x, y, z;

    public static void cross(Vector3f Result, Vector3f v1, Vector3f v2) {
        Result.x = (v1.y * v2.z) - (v1.z * v2.y);
        Result.y = (v1.z * v2.x) - (v1.x * v2.z);
        Result.z = (v1.x * v2.y) - (v1.y * v2.x);
    }

    public static float dot(Vector3f v1, Vector3f v2) {
        return (v1.x * v2.x) + (v1.y * v2.y) + (v1.z + v2.z);
    }

    public float length() {
        return (float)Math.sqrt(x * x + y * y + z * z);
    }
}