OpenGL Accumulation Buffer

kent — Mon, 07 May 2007 21:05:26 +0000

void Display()
{
now = GetTickCount();
dt = (now - last) / 1000.0;
elapsed = (now - start) / 1000.0;

lookAt = Point3(0,0,0);

lookFrom.x = (10)*cos(elapsed);
lookFrom.y = 2;
lookFrom.z = (10)*sin(elapsed);

lookVec = lookFrom - lookAt;

lookUp = lookVec.cross(lookRight);
lookUp.normalize();
lookRight = lookVec.cross(lookUp);
lookRight.normalize();

float passes = 5.0f;

glClear(GL_ACCUM_BUFFER_BIT);

for (int n=0; n<passes; n++)
{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glLoadIdentity();

// FOKUS
gluLookAt(
lookFrom[0]+n*lookVec[0]/passes/20,
lookFrom[1]+n*lookVec[1]/passes/20,
lookFrom[2]+n*lookVec[2]/passes/20,

lookAt[0], lookAt[1], lookAt[2],
up[0], up[1], up[2]);
//*/

glPushMatrix();
GLDebug::drawCoords();
glPopMatrix();

scene.display();

glAccum(GL_ACCUM, 1.0/passes);
}

glAccum(GL_RETURN, 1.0);

SwapBuffers(hDC);

last = now;
}

Freya.no » accumulation buffer

OpenGL Accumulation Buffer