Question

我在 OpenGL 中有一个摄像头，它可以在X轴和Z轴上移动。

您可以左右箭头按钮 旋转，向前，向后，向左和向右移动 WASD按钮。这是移动的方法。

public void move(float amount, float dir) {
    z += amount * Math.sin((Math.toRadians(ry + 90 * dir)));
    x += amount * Math.cos((Math.toRadians(ry + 90 * dir)));
}

＆＃34; 量＆＃34;是速度和＆＃34; dir ＆＃34;是＆＃34; 0＆＃34;或＆＃34; 1＆＃34;所以它设置＆＃34; 90＆＃34;到＆＃34; 0＆＃34;或者将其留作＆＃34; 90＆＃34;。＆＃34; ž＆＃34;是z轴上的位置。所以＆＃34; x ＆＃34;和＆＃34; y ＆＃34;。＆＃34; RZ ＆＃34;是z轴上的旋转。因此＆＃34; rx ＆＃34;和＆＃34; ry ＆＃34;。

有了这些，我不能在Y轴上移动，即向上和向下。我设法添加旋转代码以使相机 LOOK UP 和 DOWN 但我无法让相机移动到您所在的位置正在寻找。这是旋转方法：

public void rotate(float amount, float way) {
    if (way == ROTATE_RIGHT)
    ry += amount;
    else if (way == ROTATE_LEFT)
    ry -= amount;
    if (way == ROTATE_UP && rx >= -90)
    rx -= amount;
    else if (way == ROTATE_DOWN && rx <= 90)
    rx += amount;
}

这就是我调用move（）方法的方法。

if (Keyboard.isKeyDown(Keyboard.KEY_W))
    cam.move(0.01f, Camera.MOVE_STRAIGHT);

if (Keyboard.isKeyDown(Keyboard.KEY_S))
    cam.move(-0.01f, Camera.MOVE_STRAIGHT);

if (Keyboard.isKeyDown(Keyboard.KEY_A))
    cam.move(0.01f, Camera.MOVE_STRAFE);

if (Keyboard.isKeyDown(Keyboard.KEY_D))
    cam.move(-0.01f, Camera.MOVE_STRAFE);

Camera.MOVE_STRAIGHT = 1 且 Camera.MOVE_STRAFE = 0 且 cam是相机对象。

Answer 1

编辑1 ：忘记更改X / Z移动。这应该解决这些问题。

修改2 ：针对两种类型的水平移动，将amount更改为walkAmount和strafeAmount。 y现在也使用walkAmount。

修改3 ：添加了move()

public void move(float amount, float dir) {
    /* If you are moving straight ahead, or in reverse, modify the Y value for ascent/descent
     * Since you do not change your elevation if you are strafing, dir will be 0. sin(0) = 0, and the elevation will not change (regardless of whether rx is 0).
     * When you are moving forward or in reverse, dir will be 1, so the rotation about the x axis will be used, and the elevation will change (unless rx is 0).
     */
    y += amount * Math.sin(Math.toRadians(rx) * dir);

    /* If you are moving straight ahead, or in reverse, scale the delta X/Z (what comes after the +=) so that you don't move as far.
     * For example, if you are aimed straight up, and you move straight ahead (W/S), Math.cos(Math.toRadians(rx) * dir) will evaluate to 0, since you only want to move in the Y direction.
     * If you are aimed perfectly straight ahead (rotation about the x axis is 0), and you move straight ahead (A/D), Math.cos(Math.toRadians(rx) * dir) will evalute to 1, and your X/Z
     * movement would use the entire amount, since you are no longer moving in the Y direction.
     * If you are strafing (A/D), dir will be 0, and Math.cos(Math.toRadians(rx) * dir) will evalute to 1 (cos(0) == 1)). You will ONLY move in the X/Z directions when strafing.
     */
    z += amount * Math.cos(Math.toRadians(rx) * dir) * Math.sin((Math.toRadians(ry + 90 * dir)));
    x += amount * Math.cos(Math.toRadians(rx) * dir) * Math.cos((Math.toRadians(ry + 90 * dir)));
}

如果这有助于您或您有任何问题，请告诉我。

Y轴上的相机移动

1 个答案: