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Java Game APIs & Engines / OpenGL Development / Re: Suggestions for a really nice sun effect in OpenGL/Slick2D?
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on: 2013-04-09 22:27:37
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As your planet looks static, you should render it only one time (to an texture or something), and use an VBO.
3D noise is just slow, so you will not be able to render many planets at the same time this way.
Generating an texture will be much much faster in the long run.
Agreed. Unfortunately, I'm having horrible problems with shader texture binding interfering with Slick. As it stands, this shader can basically render 400x400 pixels of planet at 60 FPS, and it doesn't really matter if that's one big 400x400 planet or 100 40x40 planets. |
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Games Center / 4K Game Competition - 2013 / Annotated Code
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on: 2013-03-22 20:09:19
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So now that the competition has all but concluded, I have a suggestion: given the nature of Java4k code, it's often not too easy to read, and given they're small single-person projects, they tend to be light on comments. But it would be great to be able to learn from each other.
Would people be interested in reading/writing thoroughly annotated versions of their game code? If there's some interest, I'll start out and post an annotated version of the Parasite Escape code.
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Games Center / Showcase / Re: Patent Blaster
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on: 2013-03-14 07:22:44
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Interesting source of assets. You should patent the concept  You are quite right, I really should. And include an illustration of a deformed-looking person playing the game on a blocky computer screen.  |
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Games Center / Showcase / Patent Blaster
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on: 2013-03-13 19:04:27
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<![CDATA[<a href="http://www.youtube.com/v/0dizSEHow9Y?version=3&hl=en_US&start=" target="_blank">http://www.youtube.com/v/0dizSEHow9Y?version=3&hl=en_US&start=</a>]]>I've just released a small indie game called Patent Blaster that's based on Slick. It's a sidescrolling shooter inspired by the awfulness of patent illustrations, with weird creatures you can burn/freeze/dissolve or just shoot. If you want to give it a try, download the demo: Win Mac Linux. Let me know what you think.  
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Games Center / 4K Game Competition - 2013 / Re: Parasite Escape
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on: 2012-12-31 08:55:18
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Thanks for the feedback. The pictorial instructions were a bit of an experiment, so I'll definitely add some text to them to make things less incomprehensible. Can you describe in what way you find the controls/movement difficult? |
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Games Center / Showcase / Re: Bridge Crossing Minigame - Looking for Feedback
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on: 2012-06-08 15:33:57
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I too got stuck on level 3. I think you need to introduce the weight shifting mechanic in a much simpler level where *only* weight shifting is needed (no jumping), then a couple of levels like that before you start to combine the two.
Yeah, I think the difficulty curve is kind of wall-like. I will rework that shortly, and also introduce the concepts one by one instead of just in a massive info screen. |
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Games Center / Showcase / Re: Bridge Crossing Minigame - Looking for Feedback
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on: 2012-06-07 17:49:56
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Managed to cross every time by just going straight forward. Had to shift-reload to reset the boards. Maybe make it slippery so if you go too fast you could slip and slam through the boards. Not sure how you'd represent that with footprints tho :/
That's just the first level. The second level has a board missing, which means you have to jump. So feedback item #1: actually label the levels as LEVEL 1, LEVEL 2, etc. |
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Games Center / Showcase / Bridge Crossing Minigame - Looking for Feedback
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on: 2012-06-07 17:21:59
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 http://www.zarkonnen.com/ropebridge/A Java applet minigame for crossing a bridge. I'm not totally convinced of it as it feels a bit awkward, so feedback on how to make it work better would be brilliant. The aim is to cross the bridge and not fall down. You can move forward, jump, and crucially, shift your weight to avoid treading too heavily on damaged boards. The idea behind this is that there's lots of games where you go on an adventure: delving into a dungeon, crossing wide wastelands, etc. In historical reality, there have been lots of these adventures. The main challenge was usually the terrain (cliffs, rivers, forests to get lost in, caves that branch again and again) and the chance of accident (breaking a leg, being bitten by a snake, losing your equipment). But in games about adventures, the main challenge tends to be monsters that want to eat you. We all know RPGs have an unfortunate tendency to reduce some combination of a hack-and-slash, navigating dialogue trees, and jumping puzzles. But there's so much more to an adventure! So many other perils! LoTR is a classic story of an adventure, and there is very little fighting for the adventurers in it. It's not all clear-cut, of course: in game history there were games that centered more on other perils, like Pitfall! But anyway, I tried to make a list of all the activities that an adventure might actually involve. One of the classic ones is crossing a rickety bridge, so I thought I'd try making that into a game. |
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16
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Game Development / Newbie & Debugging Questions / Re: LWJGL Lighting problem: All faces have same color
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on: 2012-03-23 21:19:50
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You often don't want each vertex of a triangle to have to same normal.
Imagine rendering a sphere, or other curved shapes, it would look rather bad as the shade wouldn't be smooth across the surface.
Aaah, of course. OK, I'm afraid I have another question. (And BTW, thank you so much for your help so far.) So I'm now trying to render a cube, and I'm setting the normals to point straight out of the faces. However, I'm now seeing that the top face of the cube, with a normal call of 1
| glNormal3f(0.0f, 0.0f, 1.0f); |
gets the most illumination, independent of what light position I supply using 1
| glLight(GL_LIGHT1, GL_POSITION,(FloatBuffer)temp.asFloatBuffer().put(lightPosition).flip()); |
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| package com.zarkonnen.lwjgltest;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.util.glu.GLU.*;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
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 org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;
public class Main {
public static final int DISPLAY_HEIGHT = 480;
public static final int DISPLAY_WIDTH = 640;
public static final Logger LOGGER = Logger.getLogger(Main.class.getName());
private float lightAmbient[] = { 0.5f, 0.5f, 0.5f, 1.0f }; private float lightDiffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f }; private float lightPosition[] = { 0.0f, 1.0f, 0.0f, 1.0f };
static {
try {
LOGGER.addHandler(new FileHandler("errors.log", true));
} catch (IOException ex) {
LOGGER.log(Level.WARNING, ex.toString(), ex);
}
}
public static void main(String[] args) {
Main main = null;
try {
main = new Main();
main.create();
main.run();
} catch (Exception ex) {
LOGGER.log(Level.SEVERE, ex.toString(), ex);
} finally {
if (main != null) {
main.destroy();
}
}
}
ArrayList<Box> boxes = new ArrayList<Box>();
public void create() throws LWJGLException, IOException {
Display.setDisplayMode(new DisplayMode(DISPLAY_WIDTH, DISPLAY_HEIGHT));
Display.setFullscreen(false);
Display.setTitle("Hello LWJGL World!");
Display.create();
Keyboard.create();
Mouse.setGrabbed(false);
Mouse.create();
initGL();
Texture tex = TextureLoader.getTexture("png", Main.class.getResourceAsStream("tex.png"));
boxes.add(new Box(0, 0, 0, 1, 1, 1, tex));
}
public void destroy() {
Mouse.destroy();
Keyboard.destroy();
Display.destroy();
}
public void initGL() {
glEnable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); glClearColor(0.0f, 0.0f, 0.0f, 0.0f); glClearDepth(1.0f); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LEQUAL);
glMatrixMode(GL_PROJECTION); glLoadIdentity();
gluPerspective(
45.0f,
DISPLAY_WIDTH * 1.0f / DISPLAY_HEIGHT,
0.1f,
100.0f);
glMatrixMode(GL_MODELVIEW);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
ByteBuffer temp = ByteBuffer.allocateDirect(16);
temp.order(ByteOrder.nativeOrder());
glLight(GL_LIGHT1, GL_AMBIENT, (FloatBuffer)temp.asFloatBuffer().put(lightAmbient).flip()); glLight(GL_LIGHT1, GL_DIFFUSE, (FloatBuffer)temp.asFloatBuffer().put(lightDiffuse).flip()); glLight(GL_LIGHT1, GL_POSITION,(FloatBuffer)temp.asFloatBuffer().put(lightPosition).flip()); glEnable(GL_LIGHT1); }
public void processKeyboard() {
if (Keyboard.isKeyDown(Keyboard.KEY_LEFT)) { cx += 0.03f; }
if (Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) { cx -= 0.03f; }
if (Keyboard.isKeyDown(Keyboard.KEY_UP)) { cy -= 0.03f; }
if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) { cy += 0.03f; }
}
public void processMouse() {
}
float cx, cy;
public Main() throws IOException {
}
static class Box {
float x, y, z, w, d, h;
Texture tex;
public Box(float x, float y, float z, float w, float d, float h, Texture tex) {
this.x = x;
this.y = y;
this.z = z;
this.w = w;
this.d = d;
this.h = h;
this.tex = tex;
}
}
public void render() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); for (Box b : boxes) {
glLoadIdentity();
glTranslatef(cx, cy, -8);
glTranslatef(b.x, b.y, b.z);
b.tex.bind();
glBegin(GL_QUADS);
glNormal3f(0.0f, -1.0f, 0.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(b.x, b.y + b.h, b.z); glTexCoord2f(b.tex.getWidth(), 0.0f); glVertex3f(b.x + b.w, b.y + b.h, b.z);
glTexCoord2f(b.tex.getWidth(), b.tex.getHeight()); glVertex3f(b.x + b.w, b.y + b.h, b.z + b.d);
glTexCoord2f(0.0f, b.tex.getHeight()); glVertex3f(b.x, b.y + b.h, b.z + b.d);
glNormal3f(1.0f, 0.0f, 0.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(b.x + b.w, b.y, b.z); glTexCoord2f(b.tex.getWidth(), 0.0f); glVertex3f(b.x + b.w, b.y, b.z + b.d);
glTexCoord2f(b.tex.getWidth(), b.tex.getHeight()); glVertex3f(b.x + b.w, b.y + b.h, b.z + b.d);
glTexCoord2f(0.0f, b.tex.getHeight()); glVertex3f(b.x + b.w, b.y + b.h, b.z);
glNormal3f(-1.0f, 0.0f, 0.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(b.x, b.y, b.z); glTexCoord2f(b.tex.getWidth(), 0.0f); glVertex3f(b.x, b.y + b.h, b.z);
glTexCoord2f(b.tex.getWidth(), b.tex.getHeight()); glVertex3f(b.x, b.y + b.h, b.z + b.d);
glTexCoord2f(0.0f, b.tex.getHeight()); glVertex3f(b.x, b.y, b.z + b.d);
glNormal3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(b.x, b.y, b.z); glTexCoord2f(b.tex.getWidth(), 0.0f); glVertex3f(b.x, b.y, b.z + b.d);
glTexCoord2f(b.tex.getWidth(), b.tex.getHeight()); glVertex3f(b.x + b.w, b.y, b.z + b.d);
glTexCoord2f(0.0f, b.tex.getHeight()); glVertex3f(b.x + b.w, b.y, b.z);
glNormal3f(0.0f, 0.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(b.x, b.y, b.z + b.d); glTexCoord2f(b.tex.getWidth(), 0.0f); glVertex3f(b.x, b.y + b.h, b.z + b.d);
glTexCoord2f(b.tex.getWidth(), b.tex.getHeight()); glVertex3f(b.x + b.w, b.y + b.h, b.z + b.d);
glTexCoord2f(0.0f, b.tex.getHeight()); glVertex3f(b.x + b.w, b.y, b.z + b.d);
glEnd();
}
}
public void run() {
while (!Display.isCloseRequested() && !Keyboard.isKeyDown(Keyboard.KEY_ESCAPE)) {
if (Display.isVisible()) {
processKeyboard();
processMouse();
update();
render();
} else {
if (Display.isDirty()) {
render();
}
try {
Thread.sleep(100);
} catch (InterruptedException ex) {
}
}
Display.update();
Display.sync(60);
}
}
public void update() {
}
} |
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Game Development / Newbie & Debugging Questions / Re: LWJGL Lighting problem: All faces have same color
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on: 2012-03-23 20:54:14
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Show us your code.
Did you add normals to each vertex?
There you go: And no - I didn't know vertex normals were a thing! That might explain a lot! (Can you tell I'm new at this OpenGL thing?) Anyway, here's the code: 1
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| package com;
import com.zarkonnen.lwjgltest.Main;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;
import org.lwjgl.util.glu.*;
import org.lwjgl.input.Keyboard;
import java.nio.FloatBuffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class main {
public static void main(String[] args) {
try {
Display.setDisplayMode(new DisplayMode(800, 600));
Display.setTitle("3D Pyramid");
Display.create();
} catch (Exception e) {
}
initGL();
float rtri = 0.0f;
Texture texture = null;
try {
texture = TextureLoader.getTexture("png", Main.class.getResourceAsStream("tex.png"));
} catch (Exception ex) {
ex.printStackTrace();
}
while (!Display.isCloseRequested()) {
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
GL11.glLoadIdentity();
GL11.glTranslatef(0.0f, 0.0f, -10.0f);
GL11.glRotatef(rtri, 0.0f, 1.0f, 0.0f);
texture.bind();
GL11.glBegin(GL11.GL_TRIANGLES);
GL11.glTexCoord2f(0.0f, 1.0f);
GL11.glVertex3f(0.0f, 1.0f, 0.0f);
GL11.glTexCoord2f(-1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
GL11.glTexCoord2f(1.0f, -1.0f);
GL11.glVertex3f(1.0f, -1.0f, 1.0f);
GL11.glTexCoord2f(0.0f, 1.0f);
GL11.glVertex3f(0.0f, 1.0f, 0.0f);
GL11.glTexCoord2f(-1.0f, -1.0f);
GL11.glVertex3f(1.0f, -1.0f, 1.0f);
GL11.glTexCoord2f(1.0f, -1.0f);
GL11.glVertex3f(1.0f, -1.0f, -1.0f);
GL11.glTexCoord2f(0.0f, 1.0f);
GL11.glVertex3f(0.0f, 1.0f, 0.0f);
GL11.glTexCoord2f(-1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
GL11.glTexCoord2f(1.0f, -1.0f);
GL11.glVertex3f(1.0f, -1.0f, -1.0f);
GL11.glTexCoord2f(0.0f, 1.0f);
GL11.glVertex3f(0.0f, 1.0f, 0.0f);
GL11.glTexCoord2f(-1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
GL11.glTexCoord2f(1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
GL11.glEnd();
GL11.glBegin(GL11.GL_QUADS);
GL11.glVertex3f(1.0f, -1.0f, 1.0f);
GL11.glVertex3f(1.0f, -1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, -1.0f);
GL11.glVertex3f(-1.0f, -1.0f, 1.0f);
GL11.glEnd();
Display.update();
rtri += 0.05f;
boolean exitPressed = Keyboard.isKeyDown(Keyboard.KEY_ESCAPE);
if (exitPressed) {
System.out.println("Escape was pressed!");
Display.destroy();
}
}
Display.destroy();
}
private static void initGL() {
GL11.glEnable(GL11.GL_LIGHTING);
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GLU.gluPerspective(45.0f, ((float) 800) / ((float) 600), 0.1f, 100.0f);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
GL11.glLoadIdentity();
GL11.glEnable(GL11.GL_TEXTURE_2D);
GL11.glShadeModel(GL11.GL_SMOOTH);
GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
GL11.glClearDepth(1.0f);
GL11.glEnable(GL11.GL_DEPTH_TEST);
GL11.glDepthFunc(GL11.GL_LEQUAL);
GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
float lightAmbient[] = {0.5f, 0.5f, 0.5f, 1.0f}; float lightDiffuse[] = {1.0f, 1.0f, 1.0f, 1.0f}; float lightPosition[] = {0.0f, 0.0f, 2.0f, 1.0f};
ByteBuffer temp = ByteBuffer.allocateDirect(16);
temp.order(ByteOrder.nativeOrder());
GL11.glLight(GL11.GL_LIGHT1, GL11.GL_AMBIENT, (FloatBuffer) temp.asFloatBuffer().put(lightAmbient).flip()); GL11.glLight(GL11.GL_LIGHT1, GL11.GL_DIFFUSE, (FloatBuffer) temp.asFloatBuffer().put(lightDiffuse).flip()); GL11.glLight(GL11.GL_LIGHT1, GL11.GL_POSITION, (FloatBuffer) temp.asFloatBuffer().put(lightPosition).flip()); GL11.glEnable(GL11.GL_LIGHT1); }
} |
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Games Center / Showcase / SpaceGen: A rather silly open source pulp scifi world generator
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on: 2012-03-13 17:39:16
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This isn't quite a game (yet), but an open-source generator for pulp sci-fi settings inspired by How to Host a Dungeon and the Dwarf Fortress world generator. You can view an animated description of the setting's evolution, pause at any time, and export a detailed description of the world as a text file. To try it out, launch the program and keep hitting space to advance, or press R to enter auto-advance mode and come back later. You can move around with the arrow keys and see information about planets by putting the cursor over them.  Download (450 kB jar file). Example Text OutputGitHub Page (source!) |
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Games Center / 4K Game Competition - 2012 / Re: [WIP] Dawn
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on: 2011-12-20 20:34:45
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I'm impressed by how much you could get into this game, but how many times do you expect someone has to play it before figuring out a way to win? I have tried it over 10 times now and can't seem to survive for more than about 10 seconds. If I run to a drawer and try to search it the vampire will get me before the search is complete (sometimes I just have time to see the text saying what I found). Probably good game, bad player, but I would prefer if it was a lot slower. Seems like there are only a few possible maps, or do some of them just look similar? I never managed to run very far to explore. I'm glad you like it. There's actually only one map, but different starting locations. The trick to winning is to shift around furniture to block doorways, and to shake the vampire's tail: if he sees you going around a corner, he'll go up to there, but if you're not visible from there, he has to start searching the house. I'll record a session of me evading him for 8 minutes in a bit. |
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Games Center / 4K Game Competition - 2012 / Re: 4kForge
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on: 2011-12-13 08:15:41
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no windows?
A windows version would be great, but there are two obstacles: - I don't have a Windows machine to test it on. In theory, I can convert the make.sh and startserver.sh scripts to .bats, but I can't test them.
- You'd have to manually download ProGuard and kzip. I can't legally bundle them into the download, and without curl/wget and other tools, I can't write an automatic downloader.
That being said, if there are volunteers (hint, hint  ) for testing and/or help with the .bat syntax, I'll do my best to make a windows version where you just have to download ProGuard and kzip into the right directories. |
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Games Center / 4K Game Competition - 2012 / 4kForge
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on: 2011-12-12 12:41:56
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Given that it took me a long time to figure out how to get a good compression chain working, and even longer how to correctly host the resulting pack200'ed applet, I thought I'd distill what I figured out into an easy-to-use package. Hence, I present you 4kForge: http://www.zarkonnen.com/4kforge/Once installed, 4kForge lets you compile&shrink your game using a single shell script invocation, and start a server that hosts the resulted .pack.gz with another. 4kForge is available in Linux and OS X flavours, and comes with no warranty of any kind, or guarantee of correct functioning, or guarantee it will not go back in time, kill your grandfather, and cause you never to be born. Special thanks to pjt33 for his Zip2Gzip and HTTPD programs that make this possible. |
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Games Center / 4K Game Competition - 2012 / Re: [WIP] Dawn
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on: 2011-12-11 10:29:55
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It happened when a new game started, just after a Game Over.
Almost certainly the code for choosing starting positions, which has since been rewritten. Thanks! Pretty hard to play  I think you can consider one of my advices: short time in searching or longer stamina. Definitely. As it stands, the game is very hard for me, and I wrote it. I've already increased stamina by 50%, and may decrease the time taken to search and push things by like 25%. |
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29
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Games Center / 4K Game Competition - 2012 / Re: Indiespot compression not working
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on: 2011-12-10 18:06:40
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Ah, figured it out now! I wasn't actually turning the kzip into a gzip. My updated shown-to-work approach is: 1
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| cp ../src/a.java .
javac -target 1.5 a.java
jar cvfM a.normal.jar a.class
java -jar ~/Downloads/proguard4.6/lib/proguard.jar -injars a.normal.jar -outjars a.proguard.jar -libraryjars /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/classes.jar -keep public class a -optimizationpasses 9 -overloadaggressively
pack200 --effort=9 --strip-debug --no-keep-file-order -O --no-gzip a.pack a.proguard.jar
kzip -b96 -y a.kz.pack a.pack
java Zip2Gzip a.kz.pack a.kz.pack.gz
ls -la a.kz.pack.gz |
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30
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Games Center / 4K Game Competition - 2012 / Re: Indiespot compression not working
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on: 2011-12-10 17:45:14
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Try the applet tag without the archive having either a .jar or .pack.gz extension (see my example above) as the server automatically adds it.
Sadly not: the error is unchanged. However, I just tried it with Cave4k's cave.pack.gz, and that does work, so clearly the error is with my jar file.  The compression script I'm using (based off yours) goes like this: 1
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| cp ../src/a.java .
javac -target 1.5 a.java
jar cvfM a.normal.jar a.class
java -jar ~/Downloads/proguard4.6/lib/proguard.jar -injars a.normal.jar -outjars a.proguard.jar -libraryjars /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/classes.jar -keep public class a -optimizationpasses 9 -overloadaggressively
pack200 --effort=9 --strip-debug --no-keep-file-order -O --no-gzip a.pack a.proguard.jar
kzip -b96 -y a.pack.gz a.pack
ls -la a.pack.gz |
Maybe I made some mistake there? Thank you for all your help! |
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