com.github.mathiewz.slick.state.transition.RotateTransition Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of modernized-slick Show documentation
The main purpose of this libraryis to modernize and maintain the slick2D library.
The newest version!
package com.github.mathiewz.slick.state.transition;

import com.github.mathiewz.slick.Color;
import com.github.mathiewz.slick.GameContainer;
import com.github.mathiewz.slick.Graphics;
import com.github.mathiewz.slick.state.GameState;
import com.github.mathiewz.slick.state.StateBasedGame;

/**
 * A transition that causes the previous state to rotate and scale down into
 * the new state.
 *
 * This is an enter transition
 *
 * @author kevin
 */
public class RotateTransition implements Transition {
    /** The previous state */
    private GameState prev;
    /** The current angle of rotation */
    private float ang;
    /** True if the state has finished */
    private boolean finish;
    /** The current scale */
    private float scale = 1;
    /** The background applied under the previous state if any */
    private Color background;

    /**
     * Create a new transition
     */
    public RotateTransition() {

    }

    /**
     * Create a new transition
     *
     * @param background
     *            The background colour to draw under the previous state
     */
    public RotateTransition(Color background) {
        this.background = background;
    }

    /**
     * @see com.github.mathiewz.slick.state.transition.Transition#init(com.github.mathiewz.slick.state.GameState, com.github.mathiewz.slick.state.GameState)
     */
    @Override
    public void init(GameState firstState, GameState secondState) {
        prev = secondState;
    }

    /**
     * @see com.github.mathiewz.slick.state.transition.Transition#isComplete()
     */
    @Override
    public boolean isComplete() {
        return finish;
    }

    /**
     * @see com.github.mathiewz.slick.state.transition.Transition#postRender(com.github.mathiewz.slick.state.StateBasedGame, com.github.mathiewz.slick.GameContainer, com.github.mathiewz.slick.Graphics)
     */
    @Override
    public void postRender(StateBasedGame game, GameContainer container, Graphics g) {
        g.translate(container.getWidth() / 2, container.getHeight() / 2);
        g.scale(scale, scale);
        g.rotate(0, 0, ang);
        g.translate(-container.getWidth() / 2, -container.getHeight() / 2);
        if (background != null) {
            Color c = g.getColor();
            g.setColor(background);
            g.fillRect(0, 0, container.getWidth(), container.getHeight());
            g.setColor(c);
        }
        prev.render(container, game, g);
        g.translate(container.getWidth() / 2, container.getHeight() / 2);
        g.rotate(0, 0, -ang);
        g.scale(1 / scale, 1 / scale);
        g.translate(-container.getWidth() / 2, -container.getHeight() / 2);
    }

    /**
     * @see com.github.mathiewz.slick.state.transition.Transition#preRender(com.github.mathiewz.slick.state.StateBasedGame, com.github.mathiewz.slick.GameContainer, com.github.mathiewz.slick.Graphics)
     */
    @Override
    public void preRender(StateBasedGame game, GameContainer container, Graphics g) {
    }

    /**
     * @see com.github.mathiewz.slick.state.transition.Transition#update(com.github.mathiewz.slick.state.StateBasedGame, com.github.mathiewz.slick.GameContainer, int)
     */
    @Override
    public void update(StateBasedGame game, GameContainer container, int delta) {
        ang += delta * 0.5f;
        if (ang > 500) {
            finish = true;
        }
        scale -= delta * 0.001f;
        if (scale < 0) {
            scale = 0;
        }
    }

}