コード例 #1
0
  public void generateRenderSet(
      Geometry[] globalGeomList,
      Set<Geometry> renderSet,
      Camera cam,
      BoundingBox parentBox,
      boolean isRoot) {
    tempBox.setCenter(parentBox.getCenter());
    tempBox.setXExtent(parentBox.getXExtent());
    tempBox.setYExtent(parentBox.getYExtent());
    tempBox.setZExtent(parentBox.getZExtent());

    if (!isRoot) {
      findChildBound(tempBox, getSide());
    }

    tempBox.setCheckPlane(0);
    cam.setPlaneState(0);
    Camera.FrustumIntersect result = cam.contains(tempBox);
    if (result != Camera.FrustumIntersect.Outside) {
      if (length != 0) {
        int start = getOffset();
        int end = start + length;
        for (int i = start; i < end; i++) {
          renderSet.add(globalGeomList[i]);
        }
      }

      if (child == null) return;

      FastOctnode node = child;

      float x = tempBox.getCenter().x;
      float y = tempBox.getCenter().y;
      float z = tempBox.getCenter().z;
      float ext = tempBox.getXExtent();

      while (node != null) {
        if (result == Camera.FrustumIntersect.Inside) {
          node.generateRenderSetNoCheck(globalGeomList, renderSet, cam);
        } else {
          node.generateRenderSet(globalGeomList, renderSet, cam, tempBox, false);
        }

        tempBox.getCenter().set(x, y, z);
        tempBox.setXExtent(ext);
        tempBox.setYExtent(ext);
        tempBox.setZExtent(ext);

        node = node.next;
      }
    }
  }
コード例 #2
0
 private static void findChildBound(BoundingBox bbox, int side) {
   float extent = bbox.getXExtent() * 0.5f;
   bbox.getCenter()
       .set(
           bbox.getCenter().x + extent * Octnode.extentMult[side].x,
           bbox.getCenter().y + extent * Octnode.extentMult[side].y,
           bbox.getCenter().z + extent * Octnode.extentMult[side].z);
   bbox.setXExtent(extent);
   bbox.setYExtent(extent);
   bbox.setZExtent(extent);
 }
コード例 #3
0
ファイル: FloatToFixed.java プロジェクト: jingchan/jh_rogue
  private static Transform convertPositions(FloatBuffer input, BoundingBox bbox, Buffer output) {
    if (output.capacity() < input.capacity())
      throw new RuntimeException("Output must be at least as large as input!");

    Vector3f offset = bbox.getCenter().negate();
    Vector3f size = new Vector3f(bbox.getXExtent(), bbox.getYExtent(), bbox.getZExtent());
    size.multLocal(2);

    ShortBuffer sb = null;
    ByteBuffer bb = null;
    float dataTypeSize;
    float dataTypeOffset;
    if (output instanceof ShortBuffer) {
      sb = (ShortBuffer) output;
      dataTypeOffset = shortOff;
      dataTypeSize = shortSize;
    } else {
      bb = (ByteBuffer) output;
      dataTypeOffset = byteOff;
      dataTypeSize = byteSize;
    }
    Vector3f scale = new Vector3f();
    scale.set(dataTypeSize, dataTypeSize, dataTypeSize).divideLocal(size);

    Vector3f invScale = new Vector3f();
    invScale.set(size).divideLocal(dataTypeSize);

    offset.multLocal(scale);
    offset.addLocal(dataTypeOffset, dataTypeOffset, dataTypeOffset);

    // offset = (-modelOffset * shortSize)/modelSize + shortOff
    // scale = shortSize / modelSize

    input.clear();
    output.clear();
    Vector3f temp = new Vector3f();
    int vertexCount = input.capacity() / 3;
    for (int i = 0; i < vertexCount; i++) {
      BufferUtils.populateFromBuffer(temp, input, i);

      // offset and scale vector into -32768 ... 32767
      // or into -128 ... 127 if using bytes
      temp.multLocal(scale);
      temp.addLocal(offset);

      // quantize and store
      if (sb != null) {
        short v1 = (short) temp.getX();
        short v2 = (short) temp.getY();
        short v3 = (short) temp.getZ();
        sb.put(v1).put(v2).put(v3);
      } else {
        byte v1 = (byte) temp.getX();
        byte v2 = (byte) temp.getY();
        byte v3 = (byte) temp.getZ();
        bb.put(v1).put(v2).put(v3);
      }
    }

    Transform transform = new Transform();
    transform.setTranslation(offset.negate().multLocal(invScale));
    transform.setScale(invScale);
    return transform;
  }
コード例 #4
0
ファイル: ShadowUtil.java プロジェクト: gormed/solarwars
  /**
   * 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);
  }
コード例 #5
0
ファイル: BIHNode.java プロジェクト: phr00t/jmonkeyengine
  public final int intersectWhere(
      Collidable col,
      BoundingBox box,
      Matrix4f worldMatrix,
      BIHTree tree,
      CollisionResults results) {

    TempVars vars = TempVars.get();
    ArrayList<BIHStackData> stack = vars.bihStack;
    stack.clear();

    float[] minExts = {
      box.getCenter().x - box.getXExtent(),
      box.getCenter().y - box.getYExtent(),
      box.getCenter().z - box.getZExtent()
    };

    float[] maxExts = {
      box.getCenter().x + box.getXExtent(),
      box.getCenter().y + box.getYExtent(),
      box.getCenter().z + box.getZExtent()
    };

    // stack.add(new BIHStackData(this, 0, 0));
    vars.addStackData(this, 0f, 0f);

    Triangle t = new Triangle();
    int cols = 0;

    stackloop:
    while (stack.size() > 0) {
      BIHNode node = stack.remove(stack.size() - 1).node;

      while (node.axis != 3) {
        int a = node.axis;

        float maxExt = maxExts[a];
        float minExt = minExts[a];

        if (node.leftPlane < node.rightPlane) {
          // means there's a gap in the middle
          // if the box is in that gap, we stop there
          if (minExt > node.leftPlane && maxExt < node.rightPlane) {
            continue stackloop;
          }
        }

        if (maxExt < node.rightPlane) {
          node = node.left;
        } else if (minExt > node.leftPlane) {
          node = node.right;
        } else {
          // stack.add(new BIHStackData(node.right, 0, 0));
          vars.addStackData(node.right, 0f, 0f);
          node = node.left;
        }
        //                if (maxExt < node.leftPlane
        //                 && maxExt < node.rightPlane){
        //                    node = node.left;
        //                }else if (minExt > node.leftPlane
        //                       && minExt > node.rightPlane){
        //                    node = node.right;
        //                }else{

        //                }
      }

      for (int i = node.leftIndex; i <= node.rightIndex; i++) {
        tree.getTriangle(i, t.get1(), t.get2(), t.get3());
        if (worldMatrix != null) {
          worldMatrix.mult(t.get1(), t.get1());
          worldMatrix.mult(t.get2(), t.get2());
          worldMatrix.mult(t.get3(), t.get3());
        }

        int added = col.collideWith(t, results);

        if (added > 0) {
          int index = tree.getTriangleIndex(i);
          int start = results.size() - added;

          for (int j = start; j < results.size(); j++) {
            CollisionResult cr = results.getCollisionDirect(j);
            cr.setTriangleIndex(index);
          }

          cols += added;
        }
      }
    }
    vars.release();
    return cols;
  }