/*
* Minecraft Forge
* Copyright (c) 2016.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package net.minecraftforge.client.model;
import net.minecraftforge.common.model.IModelPart;
import net.minecraftforge.common.model.IModelState;
import net.minecraftforge.common.model.TRSRTransformation;
import org.apache.commons.lang3.tuple.Pair;
import com.google.common.base.Objects;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
public final class MultiModelState implements IModelState
{
private final ImmutableMap<MultiModelPart, ? extends IModelState> states;
public <M extends IModel, S extends IModelState> MultiModelState(ImmutableList<Pair<M, S>> states)
{
ImmutableMap.Builder<MultiModelPart, S> builder = ImmutableMap.builder();
for(int i = 0; i < states.size(); i++)
{
Pair<M, S> pair = states.get(i);
builder.put(new MultiModelPart(pair.getLeft(), i), pair.getRight());
}
this.states = builder.build();
}
public static IModelState getPartState(IModelState state, IModel model, int index)
{
if(state.apply(Optional.of(new MultiModelPart(model, index))).isPresent())
{
return new PartState(state, model, index);
}
return state;
}
public Optional<TRSRTransformation> apply(Optional<? extends IModelPart> part)
{
if(part.isPresent())
{
if(part.get() instanceof MultiModelPart)
{
MultiModelPart key = (MultiModelPart)part.get();
if(states.containsKey(key))
{
return Optional.of(states.get(key).apply(Optional.<IModelPart>absent()).or(TRSRTransformation.identity()));
}
}
else if(part.get() instanceof PartPart)
{
PartPart partPart = (PartPart)part.get();
MultiModelPart key = new MultiModelPart(partPart.model, partPart.index);
if(states.containsKey(key))
{
return states.get(key).apply(partPart.part);
}
}
}
return Optional.absent();
}
private static class PartState implements IModelState
{
private final IModelState state;
private final IModel model;
private final int index;
public PartState(IModelState state, IModel model, int index)
{
this.state = state;
this.model = model;
this.index = index;
}
public Optional<TRSRTransformation> apply(Optional<? extends IModelPart> part)
{
Optional<TRSRTransformation> normal = state.apply(part);
Optional<TRSRTransformation> multi = state.apply(Optional.of(new PartPart(model, index, part)));
if(normal.isPresent() && multi.isPresent())
{
return Optional.of(normal.get().compose(multi.get()));
}
return normal.or(multi);
}
}
private static class MultiModelPart implements IModelPart
{
private final IModel model;
private final int index;
public MultiModelPart(IModel model, int index)
{
this.model = model;
this.index = index;
}
@Override
public int hashCode()
{
return Objects.hashCode(model, index);
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
MultiModelPart other = (MultiModelPart)obj;
return Objects.equal(this.model, other.model) && this.index == other.index;
}
}
private static class PartPart implements IModelPart
{
private final IModel model;
private final int index;
private final Optional<? extends IModelPart> part;
public PartPart(IModel model, int index, Optional<? extends IModelPart> part)
{
this.model = model;
this.index = index;
this.part = part;
}
}
}