/*
* 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_16;
import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import static org.lwjgl.opengl.GL11.*;
/**
* Show-cases a side-scroller application for 2D games using glPushMatrix and glPopMatrix
*
* @author Oskar
*/
public class SideScrollerDemo {
public static void main(String[] args) {
// Create a Display with 640 width, 480 height, and title "Side Scroller"
try {
Display.setDisplayMode(new DisplayMode(640, 480));
Display.setTitle("Side Scroller");
Display.create();
} catch (LWJGLException e) {
e.printStackTrace();
Display.destroy();
System.exit(1);
}
// Set-up an orthographic presentation where (0, 0) is the upper-left corner and (640,
// 480) is the bottom right one.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 640, 480, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
// Translation along the x-axis
float translate_x = 0;
// Enter the main render loop
while (!Display.isCloseRequested()) {
// Clear the screen
glClear(GL_COLOR_BUFFER_BIT);
// Put another matrix, a clone of the current one, on the matrix stack.
glPushMatrix();
// Push the screen to the left or to the right, depending on translate_x.
glTranslatef(translate_x, 0, 0);
// If we're pressing the space-bar and the mouse is inside the window, increase/decrease our
// translate_x by the dynamic x movement of the mouse.
if (Keyboard.isKeyDown(Keyboard.KEY_SPACE) && Mouse.getX() > 0 && Mouse.getX() < 639) {
translate_x += Mouse.getDX();
}
// Retrieve the "true" coordinates of the mouse.
float mousex = Mouse.getX() - translate_x;
float mousey = 480 - Mouse.getY() - 1;
System.out.println("Mouse: x " + mousex + ", y " + mousey);
// Do some OpenGL rendering (code from SimpleOGLRenderer.java).
glBegin(GL_QUADS);
glVertex2i(400, 400); // Upper-left
glVertex2i(450, 400); // Upper-right
glVertex2i(450, 450); // Bottom-right
glVertex2i(400, 450); // Bottom-left
glEnd();
glBegin(GL_LINES);
glVertex2i(100, 100);
glVertex2i(200, 200);
glEnd();
// Dispose of the translations on the matrix.
glPopMatrix();
// Make sure the display stays responsive and wait until we reach 60fps.
Display.update();
Display.sync(60);
}
Display.destroy();
System.exit(0);
}
}