Accumulation Buffer problem

[darkprophet]

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?

[darkprophet]

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!  

[elias]

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

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[darkprophet]

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

[elias]

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

- elias

[darkprophet]

yay!