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  Accumulation Buffer problem  (Read 1119 times)
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Offline darkprophet

Senior Member




Go Go Gadget Arms


« Posted 2004-07-01 18:26:39 »

Hi all,
Im having some trouble with the accumulation buffer, heres my routine:

Code:
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GL11.glDisable(GL11.GL_DITHER); 
GL11.glEnable(GL11.GL_SCISSOR_TEST);
GL11.glScissor(0, 0, width, height);
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
GL11.glDisable(GL11.GL_SCISSOR_TEST);
GL11.glEnable(GL11.GL_DITHER);

GL11.glClear(GL11.GL_ACCUM_BUFFER_BIT);
  for (int i = 0; i < 16; i++) {
    GL11.glBegin(GL11.GL_QUADS);
    GL11.glVertex3f(0 + (i/5), 0 + (i/5), 0);
    GL11.glVertex3f(0 + (i/5), 1 + (i/5), 0);
    GL11.glVertex3f(1 + (i/5), 1 + (i/5), 0);
    GL11.glVertex3f(1 + (i/5), 0 + (i/5), 0);    
    GL11.glEnd();
    GL11.glAccum(GL11.GL_ACCUM, 1.0f / 16f);
  }
GL11.glAccum(GL11.GL_RETURN, 1.0f);

GL11.glFlush();
Window.update();


and I get this error:

org.lwjgl.opengl.OpenGLException: Invalid operation (1282)
at org.lwjgl.opengl.Util.checkGLError(Unknown Source)
at org.lwjgl.opengl.Window.update(Unknown Source)
......

Im using LWJGL 0.9.

Any ideas?

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Offline darkprophet

Senior Member




Go Go Gadget Arms


« Reply #1 - Posted 2004-07-01 19:04:35 »

even just:

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GL11.glClear(GL11.GL_ACCUM_BUFFER_BIT);
GL11.glAccum(GL11.GL_RETURN, 1.0f);


gets me the same error!  Embarrassed

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Offline elias

Senior Member





« Reply #2 - Posted 2004-07-01 19:37:56 »

You don't have any way of specifying accumulation buffers in LWJGL, so it's probably not supported in your context. Same story with aux buffers. They should be added I suppose.

- elias

Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline darkprophet

Senior Member




Go Go Gadget Arms


« Reply #3 - Posted 2004-07-01 21:17:17 »

That means the following to me:

No simple way to do motion blur (albeit slow)
No simple way to antialias
No simple way to do soft shadows
and no simple way to do depth of field.

DP

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Offline elias

Senior Member





« Reply #4 - Posted 2004-07-02 07:44:55 »

Worry not, it will soon come to a LWJGL implementation near you!

- elias

Offline darkprophet

Senior Member




Go Go Gadget Arms


« Reply #5 - Posted 2004-07-02 10:55:46 »

yay!  Smiley

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
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