/*
* Copyright (c) 2013, Oskar Veerhoek
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those
* of the authors and should not be interpreted as representing official policies,
* either expressed or implied, of the FreeBSD Project.
*/
package episode_29;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import utility.ImagingTools;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import static org.lwjgl.opengl.ARBTextureRectangle.GL_TEXTURE_RECTANGLE_ARB;
import static org.lwjgl.opengl.GL11.*;
/**
* Shows how to use sprite sheets.
*
* @author Oskar Veerhoek
*/
public class SpriteSheetsDemo {
private static final String WINDOW_TITLE = "Sprite Sheets Demo";
private static final int[] WINDOW_DIMENSIONS = {480, 480};
private static int spritesheet;
private static final Map<String, Sprite> spriteMap = new HashMap<String, Sprite>();
private static Sprite currentSprite;
private static final String SPRITESHEET_IMAGE_LOCATION = "res/images/spritesheet.png";
private static final String SPRITESHEET_XML_LOCATION = "res/images/spritesheet.xml";
private static void render() {
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, spritesheet);
int x = currentSprite.getX();
int y = currentSprite.getY();
int x2 = currentSprite.getX() + currentSprite.getWidth();
int y2 = currentSprite.getY() + currentSprite.getHeight();
glBegin(GL_QUADS);
glTexCoord2f(x, y);
glVertex2f(-1, 1);
glTexCoord2f(x, y2);
glVertex2f(-1, -1);
glTexCoord2f(x2, y2);
glVertex2f(1, -1);
glTexCoord2f(x2, y);
glVertex2f(1, 1);
glEnd();
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
}
private static void logic() {
// Add logic code here
}
private static void input() {
while (Keyboard.next()) {
if (Keyboard.getEventKeyState()) {
switch (Keyboard.getEventKey()) {
case Keyboard.KEY_1:
currentSprite = spriteMap.get("stone");
break;
case Keyboard.KEY_2:
currentSprite = spriteMap.get("dirt");
break;
case Keyboard.KEY_3:
currentSprite = spriteMap.get("grass");
break;
case Keyboard.KEY_4:
currentSprite = spriteMap.get("dirt");
break;
}
}
}
}
private static void cleanUp(boolean asCrash) {
glDeleteTextures(spritesheet);
Display.destroy();
System.exit(asCrash ? 1 : 0);
}
private static void setUpMatrices() {
glMatrixMode(GL_PROJECTION);
glOrtho(1, -1, 1, -1, -1f, 1f);
glMatrixMode(GL_MODELVIEW);
}
private static void setUpSpriteSheets() {
spritesheet = ImagingTools.glLoadLinearPNG(SPRITESHEET_IMAGE_LOCATION);
SAXBuilder builder = new SAXBuilder();
try {
Document document = builder.build(new File(SPRITESHEET_XML_LOCATION));
Element root = document.getRootElement();
for (Object spriteObject : root.getChildren()) {
Element spriteElement = (Element) spriteObject;
String name = spriteElement.getAttributeValue("n");
int x = spriteElement.getAttribute("x").getIntValue();
int y = spriteElement.getAttribute("y").getIntValue();
int w = spriteElement.getAttribute("w").getIntValue();
int h = spriteElement.getAttribute("h").getIntValue();
Sprite sprite = new Sprite(name, x, y, w, h);
spriteMap.put(sprite.getName(), sprite);
}
} catch (JDOMException e) {
e.printStackTrace();
cleanUp(true);
} catch (IOException e) {
e.printStackTrace();
cleanUp(true);
}
}
private static void setUpStates() {
glEnable(GL_TEXTURE_RECTANGLE_ARB);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
currentSprite = spriteMap.get("air");
}
private static void update() {
Display.update();
Display.sync(60);
}
private static void enterGameLoop() {
while (!Display.isCloseRequested()) {
render();
logic();
input();
update();
}
}
private static void setUpDisplay() {
try {
Display.setDisplayMode(new DisplayMode(WINDOW_DIMENSIONS[0], WINDOW_DIMENSIONS[1]));
Display.setTitle(WINDOW_TITLE);
Display.create();
} catch (LWJGLException e) {
e.printStackTrace();
cleanUp(true);
}
}
public static void main(String[] args) {
setUpDisplay();
setUpSpriteSheets();
setUpStates();
setUpMatrices();
enterGameLoop();
cleanUp(false);
}
}