public void postFrame(FrameBuffer out) {
if (debug) {
displayShadowMap(renderManager.getRenderer());
}
lightReceivers = getReceivers(sceneReceivers, lightReceivers);
if (lightReceivers.size() != 0) {
// setting params to recieving geometry list
setMatParams();
Camera cam = viewPort.getCamera();
// some materials in the scene does not have a post shadow technique so we're using the fall
// back material
if (needsfallBackMaterial) {
renderManager.setForcedMaterial(postshadowMat);
}
// forcing the post shadow technique and render state
renderManager.setForcedTechnique(postTechniqueName);
// rendering the post shadow pass
viewPort.getQueue().renderShadowQueue(lightReceivers, renderManager, cam, true);
if (flushQueues) {
sceneReceivers.clear();
}
// resetting renderManager settings
renderManager.setForcedTechnique(null);
renderManager.setForcedMaterial(null);
renderManager.setCamera(cam, false);
}
}
@SuppressWarnings("fallthrough")
public void postQueue(RenderQueue rq) {
GeometryList occluders = rq.getShadowQueueContent(ShadowMode.Cast);
sceneReceivers = rq.getShadowQueueContent(ShadowMode.Receive);
if (sceneReceivers.size() == 0 || occluders.size() == 0) {
return;
}
updateShadowCams(viewPort.getCamera());
Renderer r = renderManager.getRenderer();
renderManager.setForcedMaterial(preshadowMat);
renderManager.setForcedTechnique("PreShadow");
for (int shadowMapIndex = 0; shadowMapIndex < nbShadowMaps; shadowMapIndex++) {
if (debugfrustums) {
doDisplayFrustumDebug(shadowMapIndex);
}
renderShadowMap(shadowMapIndex, occluders, sceneReceivers);
}
debugfrustums = false;
if (flushQueues) {
occluders.clear();
}
// restore setting for future rendering
r.setFrameBuffer(viewPort.getOutputFrameBuffer());
renderManager.setForcedMaterial(null);
renderManager.setForcedTechnique(null);
renderManager.setCamera(viewPort.getCamera(), false);
}
/**
* Populates the outputGeometryList with the geometry of the inputGeomtryList that are in the
* frustum of the given camera
*
* @param inputGeometryList The list containing all geometry to check against the camera frustum
* @param camera the camera to check geometries against
* @param outputGeometryList the list of all geometries that are in the camera frustum
*/
public static void getGeometriesInCamFrustum(
GeometryList inputGeometryList, Camera camera, GeometryList outputGeometryList) {
for (int i = 0; i < inputGeometryList.size(); i++) {
Geometry g = inputGeometryList.get(i);
int planeState = camera.getPlaneState();
camera.setPlaneState(0);
if (camera.contains(g.getWorldBound()) != Camera.FrustumIntersect.Outside) {
outputGeometryList.add(g);
}
camera.setPlaneState(planeState);
}
}
/**
* Compute bounds of a geomList
*
* @param list
* @param transform
* @return
*/
public static BoundingBox computeUnionBound(GeometryList list, Transform transform) {
BoundingBox bbox = new BoundingBox();
for (int i = 0; i < list.size(); i++) {
BoundingVolume vol = list.get(i).getWorldBound();
BoundingVolume newVol = vol.transform(transform);
// Nehon : prevent NaN and infinity values to screw the final bounding box
if (!Float.isNaN(newVol.getCenter().x) && !Float.isInfinite(newVol.getCenter().x)) {
bbox.mergeLocal(newVol);
}
}
return bbox;
}
/**
* Compute bounds of a geomList
*
* @param list
* @param mat
* @return
*/
public static BoundingBox computeUnionBound(GeometryList list, Matrix4f mat) {
BoundingBox bbox = new BoundingBox();
BoundingVolume store = null;
for (int i = 0; i < list.size(); i++) {
BoundingVolume vol = list.get(i).getWorldBound();
store = vol.clone().transform(mat, null);
// Nehon : prevent NaN and infinity values to screw the final bounding box
if (!Float.isNaN(store.getCenter().x) && !Float.isInfinite(store.getCenter().x)) {
bbox.mergeLocal(store);
}
}
return bbox;
}
public void postQueue(RenderQueue rq) {
GeometryList occluders = rq.getShadowQueueContent(ShadowMode.Cast);
if (occluders.size() == 0) {
noOccluders = true;
return;
} else {
noOccluders = false;
}
GeometryList receivers = rq.getShadowQueueContent(ShadowMode.Receive);
// update frustum points based on current camera
Camera viewCam = viewPort.getCamera();
ShadowUtil.updateFrustumPoints(
viewCam, viewCam.getFrustumNear(), viewCam.getFrustumFar(), 1.0f, points);
Vector3f frustaCenter = new Vector3f();
for (Vector3f point : points) {
frustaCenter.addLocal(point);
}
frustaCenter.multLocal(1f / 8f);
// update light direction
shadowCam.setProjectionMatrix(null);
shadowCam.setParallelProjection(true);
// shadowCam.setFrustumPerspective(45, 1, 1, 20);
shadowCam.lookAtDirection(direction, Vector3f.UNIT_Y);
shadowCam.update();
shadowCam.setLocation(frustaCenter);
shadowCam.update();
shadowCam.updateViewProjection();
// render shadow casters to shadow map
ShadowUtil.updateShadowCamera(occluders, receivers, shadowCam, points);
Renderer r = renderManager.getRenderer();
renderManager.setCamera(shadowCam, false);
renderManager.setForcedMaterial(preshadowMat);
r.setFrameBuffer(shadowFB);
r.clearBuffers(false, true, false);
viewPort.getQueue().renderShadowQueue(ShadowMode.Cast, renderManager, shadowCam, true);
r.setFrameBuffer(viewPort.getOutputFrameBuffer());
renderManager.setForcedMaterial(null);
renderManager.setCamera(viewCam, false);
}
/**
* Populates the outputGeometryList with the geometry of the inputGeomtryList that are in the
* radius of a light. The array of camera must be an array of 6 cameara initialized so they
* represent the light viewspace of a pointlight
*
* @param inputGeometryList The list containing all geometry to check against the camera frustum
* @param cameras the camera array to check geometries against
* @param outputGeometryList the list of all geometries that are in the camera frustum
*/
public static void getGeometriesInLightRadius(
GeometryList inputGeometryList, Camera[] cameras, GeometryList outputGeometryList) {
for (int i = 0; i < inputGeometryList.size(); i++) {
Geometry g = inputGeometryList.get(i);
boolean inFrustum = false;
for (int j = 0; j < cameras.length && inFrustum == false; j++) {
Camera camera = cameras[j];
int planeState = camera.getPlaneState();
camera.setPlaneState(0);
inFrustum = camera.contains(g.getWorldBound()) != Camera.FrustumIntersect.Outside;
camera.setPlaneState(planeState);
}
if (inFrustum) {
outputGeometryList.add(g);
}
}
}
private void setMatParams() {
GeometryList l = viewPort.getQueue().getShadowQueueContent(ShadowMode.Receive);
// iteration throught all the geometries of the list to gather the materials
matCache.clear();
for (int i = 0; i < l.size(); i++) {
Material mat = l.get(i).getMaterial();
// checking if the material has the post technique and adding it to the material cache
if (mat.getMaterialDef().getTechniqueDef(postTechniqueName) != null) {
if (!matCache.contains(mat)) {
matCache.add(mat);
}
} else {
needsfallBackMaterial = true;
}
}
// iterating through the mat cache and setting the parameters
for (Material mat : matCache) {
mat.setFloat("ShadowMapSize", shadowMapSize);
for (int j = 0; j < nbShadowMaps; j++) {
mat.setMatrix4("LightViewProjectionMatrix" + j, lightViewProjectionsMatrices[j]);
}
for (int j = 0; j < nbShadowMaps; j++) {
mat.setTexture("ShadowMap" + j, shadowMaps[j]);
}
mat.setBoolean("HardwareShadows", shadowCompareMode == CompareMode.Hardware);
mat.setInt("FilterMode", edgeFilteringMode.getMaterialParamValue());
mat.setFloat("PCFEdge", edgesThickness);
mat.setFloat("ShadowIntensity", shadowIntensity);
setMaterialParameters(mat);
}
// At least one material of the receiving geoms does not support the post shadow techniques
// so we fall back to the forced material solution (transparent shadows won't be supported for
// these objects)
if (needsfallBackMaterial) {
setPostShadowParams();
}
}
/**
* Updates the shadow camera to properly contain the given points (which contain the eye camera
* frustum corners) and the shadow occluder objects.
*
* @param occluders
* @param shadowCam
* @param points
*/
public static void updateShadowCamera(
GeometryList occluders,
GeometryList receivers,
Camera shadowCam,
Vector3f[] points,
GeometryList splitOccluders) {
boolean ortho = shadowCam.isParallelProjection();
shadowCam.setProjectionMatrix(null);
if (ortho) {
shadowCam.setFrustum(-1, 1, -1, 1, 1, -1);
}
// create transform to rotate points to viewspace
Matrix4f viewProjMatrix = shadowCam.getViewProjectionMatrix();
BoundingBox splitBB = computeBoundForPoints(points, viewProjMatrix);
ArrayList<BoundingVolume> visRecvList = new ArrayList<BoundingVolume>();
for (int i = 0; i < receivers.size(); i++) {
// convert bounding box to light's viewproj space
Geometry receiver = receivers.get(i);
BoundingVolume bv = receiver.getWorldBound();
BoundingVolume recvBox = bv.transform(viewProjMatrix, null);
if (splitBB.intersects(recvBox)) {
visRecvList.add(recvBox);
}
}
ArrayList<BoundingVolume> visOccList = new ArrayList<BoundingVolume>();
for (int i = 0; i < occluders.size(); i++) {
// convert bounding box to light's viewproj space
Geometry occluder = occluders.get(i);
BoundingVolume bv = occluder.getWorldBound();
BoundingVolume occBox = bv.transform(viewProjMatrix, null);
boolean intersects = splitBB.intersects(occBox);
if (!intersects && occBox instanceof BoundingBox) {
BoundingBox occBB = (BoundingBox) occBox;
// Kirill 01/10/2011
// Extend the occluder further into the frustum
// This fixes shadow dissapearing issues when
// the caster itself is not in the view camera
// but its shadow is in the camera
// The number is in world units
occBB.setZExtent(occBB.getZExtent() + 50);
occBB.setCenter(occBB.getCenter().addLocal(0, 0, 25));
if (splitBB.intersects(occBB)) {
// To prevent extending the depth range too much
// We return the bound to its former shape
// Before adding it
occBB.setZExtent(occBB.getZExtent() - 50);
occBB.setCenter(occBB.getCenter().subtractLocal(0, 0, 25));
visOccList.add(occBox);
if (splitOccluders != null) {
splitOccluders.add(occluder);
}
}
} else if (intersects) {
visOccList.add(occBox);
if (splitOccluders != null) {
splitOccluders.add(occluder);
}
}
}
BoundingBox casterBB = computeUnionBound(visOccList);
BoundingBox receiverBB = computeUnionBound(visRecvList);
// Nehon 08/18/2010 this is to avoid shadow bleeding when the ground is set to only receive
// shadows
if (visOccList.size() != visRecvList.size()) {
casterBB.setXExtent(casterBB.getXExtent() + 2.0f);
casterBB.setYExtent(casterBB.getYExtent() + 2.0f);
casterBB.setZExtent(casterBB.getZExtent() + 2.0f);
}
TempVars vars = TempVars.get();
Vector3f casterMin = casterBB.getMin(vars.vect1);
Vector3f casterMax = casterBB.getMax(vars.vect2);
Vector3f receiverMin = receiverBB.getMin(vars.vect3);
Vector3f receiverMax = receiverBB.getMax(vars.vect4);
Vector3f splitMin = splitBB.getMin(vars.vect5);
Vector3f splitMax = splitBB.getMax(vars.vect6);
splitMin.z = 0;
// if (!ortho) {
// shadowCam.setFrustumPerspective(45, 1, 1, splitMax.z);
// }
Matrix4f projMatrix = shadowCam.getProjectionMatrix();
Vector3f cropMin = vars.vect7;
Vector3f cropMax = vars.vect8;
// IMPORTANT: Special handling for Z values
cropMin.x = max(max(casterMin.x, receiverMin.x), splitMin.x);
cropMax.x = min(min(casterMax.x, receiverMax.x), splitMax.x);
cropMin.y = max(max(casterMin.y, receiverMin.y), splitMin.y);
cropMax.y = min(min(casterMax.y, receiverMax.y), splitMax.y);
cropMin.z = min(casterMin.z, splitMin.z);
cropMax.z = min(receiverMax.z, splitMax.z);
// Create the crop matrix.
float scaleX, scaleY, scaleZ;
float offsetX, offsetY, offsetZ;
scaleX = (2.0f) / (cropMax.x - cropMin.x);
scaleY = (2.0f) / (cropMax.y - cropMin.y);
offsetX = -0.5f * (cropMax.x + cropMin.x) * scaleX;
offsetY = -0.5f * (cropMax.y + cropMin.y) * scaleY;
scaleZ = 1.0f / (cropMax.z - cropMin.z);
offsetZ = -cropMin.z * scaleZ;
Matrix4f cropMatrix = vars.tempMat4;
cropMatrix.set(
scaleX, 0f, 0f, offsetX, 0f, scaleY, 0f, offsetY, 0f, 0f, scaleZ, offsetZ, 0f, 0f, 0f, 1f);
Matrix4f result = new Matrix4f();
result.set(cropMatrix);
result.multLocal(projMatrix);
vars.release();
shadowCam.setProjectionMatrix(result);
}