/**
* Sets the GL lighting state to a white light originating from the eye position and pointed in the specified
* direction, in model coordinates. The light direction is always relative to the current eye point and viewer
* direction. If the direction is null, this the light direction defaults to (0, 0, -1), which points directly along
* the forward vector form the eye point
*
* @param gl the GL context.
* @param light the GL light name to set.
* @param direction the light direction in model coordinates, may be null.
*
* @throws ArgumentException if the GL is null.
*/
public static void applyLightingDirectionalFromViewer(GL2 gl, int light, Vec4 direction)
{
if (gl == null)
{
String message = Logging.getMessage("nullValue.GLIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (direction == null)
{
direction = DEFAULT_LIGHT_DIRECTION;
}
float[] ambient = { 1f, 1f, 1f, 0f };
float[] diffuse = { 1f, 1f, 1f, 0f };
float[] specular = { 1f, 1f, 1f, 0f };
float[] position = { (float)direction.x, (float)direction.y, (float)direction.z, 0.0f };
gl.glLightfv(light, GL2.GL_AMBIENT, ambient, 0);
gl.glLightfv(light, GL2.GL_DIFFUSE, diffuse, 0);
gl.glLightfv(light, GL2.GL_SPECULAR, specular, 0);
OGLStackHandler ogsh = new OGLStackHandler();
ogsh.pushModelviewIdentity(gl);
try
{
gl.glLightfv(light, GL2.GL_POSITION, position, 0);
}
finally
{
ogsh.pop(gl);
}
}
/** Constructs a new OGLRenderToTextureSupport, but otherwise does nothing. */
public OGLRenderToTextureSupport()
{
this.isFramebufferObjectEnabled = true;
this.stackHandler = new OGLStackHandler();
}