/**
* This computes the "C" value in the geomipmapping paper. See section "2.3.1.2 Pre-calculating d"
*
* @param cam
* @param pixelLimit
* @return
*/
private float getCameraConstant(Camera cam, float pixelLimit) {
float n = cam.getFrustumNear();
float t = FastMath.abs(cam.getFrustumTop());
float A = n / t;
float v_res = cam.getHeight();
float T = (2f * pixelLimit) / v_res;
return A / T;
}
public void initialize(RenderManager rm, ViewPort vp) {
renderManager = rm;
renderer = rm.getRenderer();
viewPort = vp;
fsQuad = new Picture("filter full screen quad");
Camera cam = vp.getCamera();
// save view port diensions
left = cam.getViewPortLeft();
right = cam.getViewPortRight();
top = cam.getViewPortTop();
bottom = cam.getViewPortBottom();
originalWidth = cam.getWidth();
originalHeight = cam.getHeight();
// first call to reshape
reshape(vp, cam.getWidth(), cam.getHeight());
}
// debug only : displays maps
protected void displayMap(Renderer r, Picture pic, int left) {
Camera cam = vp.getCamera();
rm.setCamera(cam, true);
int h = cam.getHeight();
pic.setPosition(left, h / 20f);
pic.setWidth(128);
pic.setHeight(128);
pic.updateGeometricState();
rm.renderGeometry(pic);
rm.setCamera(cam, false);
}
// debug only : displays depth shadow maps
protected void displayShadowMap(Renderer r) {
Camera cam = viewPort.getCamera();
renderManager.setCamera(cam, true);
int h = cam.getHeight();
for (int i = 0; i < dispPic.length; i++) {
dispPic[i].setPosition((128 * i) + (150 + 64 * (i + 1)), h / 20f);
dispPic[i].setWidth(128);
dispPic[i].setHeight(128);
dispPic[i].updateGeometricState();
renderManager.renderGeometry(dispPic[i]);
}
renderManager.setCamera(cam, false);
}
/**
* Updates a points arrays with the frustum corners of the provided camera.
*
* @param viewCam
* @param points
*/
public static void updateFrustumPoints2(Camera viewCam, Vector3f[] points) {
int w = viewCam.getWidth();
int h = viewCam.getHeight();
points[0].set(viewCam.getWorldCoordinates(new Vector2f(0, 0), 0));
points[1].set(viewCam.getWorldCoordinates(new Vector2f(0, h), 0));
points[2].set(viewCam.getWorldCoordinates(new Vector2f(w, h), 0));
points[3].set(viewCam.getWorldCoordinates(new Vector2f(w, 0), 0));
points[4].set(viewCam.getWorldCoordinates(new Vector2f(0, 0), 1));
points[5].set(viewCam.getWorldCoordinates(new Vector2f(0, h), 1));
points[6].set(viewCam.getWorldCoordinates(new Vector2f(w, h), 1));
points[7].set(viewCam.getWorldCoordinates(new Vector2f(w, 0), 1));
}
@Override
protected void initialize(Application app) {
ed = getState(EntityDataState.class).getEntityData();
entities = ed.getEntities(Position.class, ModelType.class);
// Calculate how big min/max needs to be to incorporate
// the full view + margin at z = 0
Camera cam = app.getCamera();
float z = cam.getViewToProjectionZ(cam.getLocation().z);
Vector3f worldMin = cam.getWorldCoordinates(new Vector2f(0, 0), z);
Vector3f worldMax = cam.getWorldCoordinates(new Vector2f(cam.getWidth(), cam.getHeight()), z);
min = worldMin.addLocal(-margin, -margin, 0);
max = worldMax.addLocal(margin, margin, 0);
}
