de.javagl.jgltf.viewer.DefaultRenderedCamera Maven / Gradle / Ivy
/*
* www.javagl.de - JglTF
*
* Copyright 2015-2016 Marco Hutter - http://www.javagl.de
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
package de.javagl.jgltf.viewer;
import java.util.Objects;
import java.util.function.DoubleSupplier;
import de.javagl.jgltf.model.CameraModel;
import de.javagl.jgltf.model.MathUtils;
import de.javagl.jgltf.model.NodeModel;
/**
* Default implementation of a {@link RenderedCamera}
*/
public class DefaultRenderedCamera implements RenderedCamera
{
/**
* The {@link NodeModel} that the view matrix will be computed from
*/
private final NodeModel nodeModel;
/**
* The {@link CameraModel} that will be used to compute the projection
* matrix
*/
private final CameraModel cameraModel;
/**
* The view matrix
*/
private final float viewMatrix[];
/**
* The projection matrix
*/
private final float projectionMatrix[];
/**
* An optional supplier for the aspect ratio. If this is null
,
* then the aspect ratio of the camera will be used
*/
private final DoubleSupplier aspectRatioSupplier;
/**
* A human-readable string, name identifying this camera
*/
private final String name;
/**
* Default constructor
*
* @param name The name
* @param nodeModel The {@link NodeModel}
* @param cameraModel The {@link CameraModel}
* @param aspectRatioSupplier The optional supplier for the aspect ratio
*/
DefaultRenderedCamera(String name,
NodeModel nodeModel, CameraModel cameraModel,
DoubleSupplier aspectRatioSupplier)
{
this.name = name;
this.nodeModel = Objects.requireNonNull(
nodeModel, "The nodeModel may not be null");
this.cameraModel = Objects.requireNonNull(
cameraModel, "The cameraModel may not be null");
this.aspectRatioSupplier = aspectRatioSupplier;
this.viewMatrix = new float[16];
this.projectionMatrix = new float[16];
}
@Override
public float[] getViewMatrix()
{
nodeModel.computeGlobalTransform(viewMatrix);
MathUtils.invert4x4(viewMatrix, viewMatrix);
return viewMatrix;
}
@Override
public float[] getProjectionMatrix()
{
Float aspectRatio = null;
if (aspectRatioSupplier != null)
{
aspectRatio = (float)aspectRatioSupplier.getAsDouble();
}
cameraModel.computeProjectionMatrix(projectionMatrix, aspectRatio);
return projectionMatrix;
}
@Override
public String toString()
{
return name;
}
}
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