one.empty3.library.core.raytracer.tree.derivative.AlgebricTreeDerivative Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of empty3-library-3d Show documentation
Show all versions of empty3-library-3d Show documentation
3D rendering engine. Plus modeling. Expected glsl textures 3d and 2d rendering
/*
* Copyright (c) 2022-2023. Manuel Daniel Dahmen
*
*
* Copyright 2012-2023 Manuel Daniel Dahmen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package one.empty3.library.core.raytracer.tree.derivative;
import one.empty3.library.core.raytracer.tree.*;
import java.util.ArrayList;
import java.util.concurrent.atomic.AtomicInteger;
public class AlgebricTreeDerivative {
public TreeNode getDerivative(String variable, TreeNode currentTreeNode,
TreeNode derivate) {
Class type = currentTreeNode.getType().getClass();
if (VariableTreeNodeType.class.equals(type)) {
TreeNodeDouble treeNodeDouble = new TreeNodeDouble(derivate, new Object[]{}, new DoubleTreeNodeType());
if (currentTreeNode.getExpressionString().equals(variable)) {
treeNodeDouble.getType().setValues(new Object[]{1.0});
} else {
treeNodeDouble.getType().setValues(new Object[]{0.0});
}
return treeNodeDouble;
} else if (TermTreeNodeType.class.equals(type)) {
TermTreeNodeType termTreeNodeType = new TermTreeNodeType(+1.0);
TreeNode treeNode = new TreeNode(derivate, new Object[]{currentTreeNode.getExpressionString()},
termTreeNodeType);
currentTreeNode.getChildren().forEach(tn -> {
derivate.getChildren().add(getDerivative(variable, tn, derivate));
});
return treeNode;
} else if (FactorTreeNodeType.class.equals(type)) {
TermTreeNodeType termTreeNodeType = new TermTreeNodeType(+1.0);
for (int i = 0; i < currentTreeNode.getChildren().size(); i++) {
TreeNode treeNode = new TreeNode(derivate, new Object[]{currentTreeNode.getExpressionString()},
termTreeNodeType);
AtomicInteger j= new AtomicInteger();
int finalI = i;
currentTreeNode.getChildren().forEach(tn -> {
TreeNode treeNode1;
if(finalI ==j.get()) {
treeNode1 = getDerivative(variable, tn, treeNode);
} else {
treeNode1 = new TreeNode(tn, new Object[]{currentTreeNode.getExpressionString()},
new FactorTreeNodeType(tn.getType().getSign1()));
}
derivate.getChildren().add(treeNode1);
j.getAndIncrement();
});
}
return derivate;
} else if (ExponentTreeNodeType.class.equals(type)) {
TreeNode e1 = currentTreeNode.getChildren().get(0);
TreeNode e2 = currentTreeNode.getChildren().get(1);
if(variable.equals(e1.getExpressionString())) {
FactorTreeNodeType factorTreeNodeType = new FactorTreeNodeType(1.0);
TreeNode treeNode = new TreeNode(derivate, new Object[] {derivate.getExpressionString()},
factorTreeNodeType);
TreeNode treeNode1 = new TreeNode(treeNode, new Object[]{e2.getExpressionString()}, new TermTreeNodeType(1.0));
treeNode1.getChildren().add(e2);
TreeNodeDouble treeNodeDouble = new TreeNodeDouble(treeNode1, new Object[]{"-1.0"}
, new DoubleTreeNodeType());
treeNode1.getChildren().add(treeNode1);
treeNode1.getChildren().add(treeNodeDouble);
treeNode.getChildren().add(treeNode1);
}
}
throw new UnsupportedOperationException("Not yet implemented");
//return algebricTree;
}
}