So I'm Making a Game

[jacek]

Do it! Do it naow!

Tomorrow Actually maybe Saturday (it's the last exam tomorrow and we are going to the pub afterwards ).

Reason: It needs a launcher to handle the downloading of the correct lwjgl stuff and I haven’t made that yet.

[EcazS]

I approve of the pub.
I disapprove of no launcher

[jacek]

Not much but you can actually do something now, the little red box in the middle of the screen is the player. It always looks in the direction of your mouse and can move forward and back.

I will now try to make it an applet

[jacek]

I have no idea if this will work, http://jacekk.co.uk/Lux/play.html

[EcazS]

It works! Huzzahs are in order!

[Temor]

Now that's cool. I will definitely take a look at LWJGL

[bowersbros]

I can't get it to run on my laptop

It just freezes as soon as it loads.

Gives me an fps of 489. maybe that has something to do with it?

[jacek]

Gives me an fps of 489. maybe that has something to do with it?

That's pretty low considering the amount of geometry. The applet loaders seems really buggy or something, I've made some big changes since then so I'll make a proper downloadable version for the next one

[jacek]

Now that's cool. I will definitely take a look at LWJGL

It's actually really easy

For example, here is the really simple code to render the "player"

[syntax=java]// build VBO
this.dataVBOId = ARBVertexBufferObject.glGenBuffersARB();
this.indexVBOId = ARBVertexBufferObject.glGenBuffersARB();

int intSize = Integer.SIZE / 8;
int floatSize = Float.SIZE / 8;
int doubleSize = Double.SIZE / 8;

this.vertexSize = doubleSize * 3;
this.normalSize = doubleSize * 3;
this.colourSize = floatSize * 4;

this.totalVertices = 8;

this.VBOElementSize = this.vertexSize + this.normalSize + this.colourSize;
int totalDataSize = this.VBOElementSize * this.totalVertices;
int totalIndexSize = intSize * this.totalVertices;

ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, this.dataVBOId);
ARBVertexBufferObject.glBufferDataARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, totalDataSize, ARBVertexBufferObject.GL_STATIC_DRAW_ARB);

ByteBuffer dataBuffer = ARBVertexBufferObject.glMapBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, ARBVertexBufferObject.GL_WRITE_ONLY_ARB, totalDataSize, null);

// base
dataBuffer.putDouble(-20).putDouble(20).putDouble(0.1);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(1.0f).putFloat(0.4f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(20).putDouble(20).putDouble(0.1);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(1.0f).putFloat(0.4f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(20).putDouble(-20).putDouble(0.1);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(1.0f).putFloat(0.4f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(-20).putDouble(-20).putDouble(0.1);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(1.0f).putFloat(0.4f).putFloat(0.4f).putFloat(1);

// gun
dataBuffer.putDouble(-6).putDouble(26).putDouble(0.2);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(0.4f).putFloat(1.0f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(6).putDouble(26).putDouble(0.2);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(0.4f).putFloat(1.0f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(6).putDouble(4).putDouble(0.2);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(0.4f).putFloat(1.0f).putFloat(0.4f).putFloat(1);

dataBuffer.putDouble(-6).putDouble(4).putDouble(0.2);
dataBuffer.putDouble(0).putDouble(0).putDouble(1);
dataBuffer.putFloat(0.4f).putFloat(1.0f).putFloat(0.4f).putFloat(1);

dataBuffer.flip();

ARBVertexBufferObject.glUnmapBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB);
ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, 0);

ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, this.indexVBOId);
ARBVertexBufferObject.glBufferDataARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, totalIndexSize, ARBVertexBufferObject.GL_STATIC_DRAW_ARB);

ByteBuffer indexBuffer = ARBVertexBufferObject.glMapBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, ARBVertexBufferObject.GL_WRITE_ONLY_ARB, totalIndexSize, null);

for (int i = 0; i < this.totalVertices; ++i){
indexBuffer.putInt(i);
}

indexBuffer.flip();

ARBVertexBufferObject.glUnmapBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB);
ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, 0);

// render VBO
GL11.glEnableClientState(GL11.GL_VERTEX_ARRAY);
GL11.glEnableClientState(GL11.GL_NORMAL_ARRAY);
GL11.glEnableClientState(GL11.GL_COLOR_ARRAY);

ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, this.dataVBOId);
ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, this.indexVBOId);

GL11.glVertexPointer(3, GL11.GL_DOUBLE, this.VBOElementSize, 0);
GL11.glNormalPointer(GL11.GL_DOUBLE, this.VBOElementSize, this.vertexSize);
GL11.glColorPointer(4, GL11.GL_FLOAT, this.VBOElementSize, this.vertexSize + this.normalSize);

GL11.glPushMatrix();
GL11.glRotated(this.lookAngle, 0, 0, -1);
GL11.glDrawElements(GL11.GL_QUADS, this.totalVertices, GL11.GL_UNSIGNED_INT, 0);
GL11.glPopMatrix();

ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, 0);
ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ELEMENT_ARRAY_BUFFER_ARB, 0);

GL11.glDisableClientState(GL11.GL_VERTEX_ARRAY);
GL11.glDisableClientState(GL11.GL_NORMAL_ARRAY);
GL11.glDisableClientState(GL11.GL_COLOR_ARRAY);[/syntax]

See, simple...

[Temor]

It looks very... light weight...

[jacek]

It looks very... light weight...

Light weight does not necessary mean less code. The above could be done with about 20 lines, all of the extra is creating a buffer in the GPU memory so that the geometry is read from there, making it super fast

[Temor]

That sounds reasonable. I always figured light weight stuff would be light weight from the start, i.e small filesizes, instead of making the output light weight. But it does seem like the smarter thing to do

[jacek]

Since everyone is SO curious about the MD5 hashes for the files you can now view them here http://jacekk.co.uk/Lux/md5.php

[jacek]

Nobody amazed by my hashes

[EcazS]

Nobody amazed by my hashes

Oh sorry, I forgot to post. I was BAFFLED by them!

[jacek]

Oh sorry, I forgot to post. I was BAFFLED by them!

HOORAY !

[jacek]

Launcher made: http://jacekk.co.uk/Lux/LuxLauncher.jar

It will handle downloading the necessary library files and all that boring stuff. Download it and run it with your favourite JVM.

The changes since the applet version are not that interesting, I put a limit on the turning speed and added some basic collision detection for the walls. The location of the wall blocks is still totally random so you might get stuck in one it it spawns at 32,32.

[bowersbros]

Launcher made: http://jacekk.co.uk/Lux/LuxLauncher.jar

It will handle downloading the necessary library files and all that boring stuff. Download it and run it with your favourite JVM.

The changes since the applet version are not that interesting, I put a limit on the turning speed and added some basic collision detection for the walls. The location of the wall blocks is still totally random so you might get stuck in one it it spawns at 32,32.

Why not make it so that it can't spawn at 32,32? Or you spawn randomly, and do a check for if there is a block there?

[jacek]

Why not make it so that it can't spawn at 32,32? Or you spawn randomly, and do a check for if there is a block there?

Because the random blocks are not how the levels will actually be, they are just there so I can test the collisions and pathfinding when I get to enemies.

[bowersbros]

Why not make it so that it can't spawn at 32,32? Or you spawn randomly, and do a check for if there is a block there?

Because the random blocks are not how the levels will actually be, they are just there so I can test the collisions and pathfinding when I get to enemies.

Ah okay.

[jacek]

You can now shoot little green lines