org.terasology.rendering.cameras.FirstPersonCamera.java Source code

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Here is the source code for org.terasology.rendering.cameras.FirstPersonCamera.java

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/*
 * Copyright 2011 Benjamin Glatzel <benjamin.glatzel@me.com>.
 *
 * 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 org.terasology.rendering.cameras;

import org.lwjgl.opengl.GL11;
import org.lwjgl.util.glu.GLU;
import org.terasology.logic.manager.ConfigurationManager;

import javax.vecmath.Vector3d;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.util.glu.GLU.gluPerspective;

/**
 * Provides global access to fonts.
 *
 * @author Benjamin Glatzel <benjamin.glatzel@me.com>
 */
public class FirstPersonCamera extends Camera {

    public static final float ASPECT_RATIO = ((Double) ConfigurationManager.getInstance().getConfig()
            .get("Graphics.aspectRatio")).floatValue();
    double _bobbingRotationOffsetFactor, _bobbingVerticalOffsetFactor = 0.0;

    public void loadProjectionMatrix() {
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        gluPerspective(_activeFov, ASPECT_RATIO, 0.1f, 1024f);

        glMatrixMode(GL11.GL_MODELVIEW);
    }

    public void loadModelViewMatrix() {
        glMatrixMode(GL11.GL_MODELVIEW);
        glLoadIdentity();

        Vector3d right = new Vector3d();
        right.cross(_viewingDirection, _up);
        right.scale(_bobbingRotationOffsetFactor);

        GLU.gluLookAt((float) _position.x, (float) _position.y + (float) _bobbingVerticalOffsetFactor * 2.0f,
                (float) _position.z, (float) _position.x + (float) _viewingDirection.x,
                (float) _position.y + (float) _viewingDirection.y + (float) _bobbingVerticalOffsetFactor * 2.0f,
                (float) _position.z + (float) _viewingDirection.z, (float) _up.x + (float) right.x,
                (float) _up.y + (float) right.y, (float) _up.z + (float) right.z);

        _viewFrustum.updateFrustum();
    }

    public void loadNormalizedModelViewMatrix() {
        glMatrixMode(GL11.GL_MODELVIEW);
        glLoadIdentity();

        Vector3d right = new Vector3d();
        right.cross(_viewingDirection, _up);
        right.scale(_bobbingRotationOffsetFactor);

        GLU.gluLookAt(0f, 0f, 0f, (float) _viewingDirection.x, (float) _viewingDirection.y,
                (float) _viewingDirection.z, (float) _up.x + (float) right.x, (float) _up.y + (float) right.y,
                (float) _up.z + (float) right.z);
    }

    public void setBobbingRotationOffsetFactor(double f) {
        _bobbingRotationOffsetFactor = f;
    }

    public void setBobbingVerticalOffsetFactor(double f) {
        _bobbingVerticalOffsetFactor = f;
    }
}