Java Code Examples for com.jme3.math.FastMath#tan()

The following examples show how to use com.jme3.math.FastMath#tan() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: FlyByCamera.java    From jmonkeyengine with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
/**
 * Zoom the camera by the specified amount.
 *
 * @param value zoom amount
 */
protected void zoomCamera(float value){
    // derive fovY value
    float h = cam.getFrustumTop();
    float w = cam.getFrustumRight();
    float aspect = w / h;

    float near = cam.getFrustumNear();

    float fovY = FastMath.atan(h / near)
            / (FastMath.DEG_TO_RAD * .5f);
    float newFovY = fovY + value * 0.1f * zoomSpeed;
    if (newFovY > 0f) {
        // Don't let the FOV go zero or negative.
        fovY = newFovY;
    }

    h = FastMath.tan( fovY * FastMath.DEG_TO_RAD * .5f) * near;
    w = h * aspect;

    cam.setFrustumTop(h);
    cam.setFrustumBottom(-h);
    cam.setFrustumLeft(-w);
    cam.setFrustumRight(w);
}
Example 2
Source File: StaticCamera.java    From OpenRTS with MIT License 6 votes vote down vote up 
protected void zoomCamera(float value){
    // derive fovY value
    float h = cam.getFrustumTop();
    float w = cam.getFrustumRight();
    float aspect = w / h;

    float near = cam.getFrustumNear();

    float fovY = FastMath.atan(h / near)
              / (FastMath.DEG_TO_RAD * .5f);
    fovY += value * 0.1f;

    h = FastMath.tan( fovY * FastMath.DEG_TO_RAD * .5f) * near;
    w = h * aspect;

    cam.setFrustumTop(h);
    cam.setFrustumBottom(-h);
    cam.setFrustumLeft(-w);
    cam.setFrustumRight(w);
}
Example 3
Source File: FlyByCamera.java    From MikuMikuStudio with BSD 2-Clause "Simplified" License 6 votes vote down vote up 
protected void zoomCamera(float value){
    // derive fovY value
    float h = cam.getFrustumTop();
    float w = cam.getFrustumRight();
    float aspect = w / h;

    float near = cam.getFrustumNear();

    float fovY = FastMath.atan(h / near)
              / (FastMath.DEG_TO_RAD * .5f);
    fovY += value * 0.1f;

    h = FastMath.tan( fovY * FastMath.DEG_TO_RAD * .5f) * near;
    w = h * aspect;

    cam.setFrustumTop(h);
    cam.setFrustumBottom(-h);
    cam.setFrustumLeft(-w);
    cam.setFrustumRight(w);
}
Example 4
Source File: AbstractCameraController.java    From MikuMikuStudio with BSD 2-Clause "Simplified" License 6 votes vote down vote up 
protected void zoomCamera(float amount) {
    amount = cam.getLocation().distance(focus) * amount;
    float dist = cam.getLocation().distance(focus);
    amount = dist - Math.max(0f, dist - amount);
    Vector3f loc = cam.getLocation().clone();
    loc.scaleAdd(amount, cam.getDirection(), loc);
    cam.setLocation(loc);

    if (cam.isParallelProjection()) {
        float aspect = (float) cam.getWidth() / cam.getHeight();
        float h = FastMath.tan(45f * FastMath.DEG_TO_RAD * .5f) * dist;
        float w = h * aspect;
        cam.setFrustum(-1000, 1000, -w, w, h, -h);
    }

}
Example 5
Source File: AbstractCameraController.java    From MikuMikuStudio with BSD 2-Clause "Simplified" License 6 votes vote down vote up 
protected boolean doToggleOrthoPerspMode() {

        float aspect = (float) cam.getWidth() / cam.getHeight();
        if (!cam.isParallelProjection()) {
            cam.setParallelProjection(true);
            float h = cam.getFrustumTop();
            float w = cam.getFrustumRight();
            float dist = cam.getLocation().distance(focus);
            float fovY = FastMath.atan(h) / (FastMath.DEG_TO_RAD * .5f);
            h = FastMath.tan(fovY * FastMath.DEG_TO_RAD * .5f) * dist;
            w = h * aspect;
            cam.setFrustum(-1000, 1000, -w, w, h, -h);
            return true;
        } else {
            cam.setParallelProjection(false);
            cam.setFrustumPerspective(45f, aspect, 1, 1000);
            return false;
        }
    }