hkDemo::Result RayTraceDemo::stepDemo()
{
if ( m_env->m_window->getMouse().getButtonState() != 0 )
{
m_rotateCounter = 60;
}
m_rotateCounter--;
// rotate the camera viewpoint
if (m_rotateCounter <= 0)
{
hkgWindow* w = m_env->m_window;
hkgCamera* c = w->getViewport(0)->getCamera();
hkVector4 from; c->getFrom( &from(0) );
hkVector4 to; c->getTo(&to(0));
hkVector4 up; c->getUp(&up(0));
up.set(0,1,0);
hkVector4 d; d.setSub4(to, from);
hkQuaternion q( up, .03f);
d.setRotatedDir(q, d);
from.setSub4(to, d);
setupDefaultCameras(m_env, from, to, up );
}
//
// Do our raytrace
//
{
//
// Get our camera information
//
hkVector4 from;
hkVector4 zOffset;
hkVector4 upOffset;
hkVector4 rightOffset;
{
from.setZero4();
zOffset.setZero4();
upOffset.setZero4();
rightOffset.setZero4();
hkgWindow* w = m_env->m_window;
hkgCamera* c = w->getViewport(0)->getCamera();
c->getFrom( &from(0) );
c->getDir( &zOffset(0) );
c->getUp( &upOffset(0) );
rightOffset.setCross( upOffset, zOffset );
}
//
// global info
//
hkVector4 lightPos; lightPos.setAddMul4( from, upOffset, 10 );
hkReal lightStrength = 150.0f;
// reflect the light in the normal graphics too
{
hkVector4 lightDir;
hkVector4 lightTo;
m_env->m_window->getViewport(0)->getCamera()->getDir( &lightTo(0) );
lightTo.add4( from );
lightDir.setSub4( lightTo, lightPos);
setSoleDirectionLight(m_env, &lightDir(0), 0xffffffff);
}
//
// Prepare the data for iterations
//
{
hkgWindow* w = m_env->m_window;
hkgCamera* c = w->getViewport(0)->getCamera();
hkReal fa = c->getFar();
zOffset.mul4( fa );
upOffset.mul4( fa * c->getFOV() / 45 * CANVAS_HEIGHT/ CANVAS_WIDTH);
rightOffset.mul4( fa * c->getFOV() / 45 );
}
hkpShapeRayCastInput ray;
ray.m_from = from;
ray.m_to.setAdd4( from, zOffset );
ray.m_to.addMul4( 0.5f, upOffset );
ray.m_to.addMul4( 0.5f, rightOffset );
upOffset.mul4( 1.0f / CANVAS_HEIGHT );
rightOffset.mul4( 1.0f / CANVAS_WIDTH );
m_numPrimaryRays = 0;
m_numShadowRays = 0;
hkpShapeRayCastInput lightRay;
lightRay.m_from = lightPos;
//
// Do the raytracer
//
HK_TIMER_BEGIN("Raytrace Frame", HK_NULL);
m_stopwatch.start();
{
hkpShapeRayCastOutput output;
hkpShapeRayCastOutput output2;
int* data = reinterpret_cast<int*>(m_texture->getDataPointer());
hkVector4 yStart = ray.m_to;
for (int y = 0; y < CANVAS_HEIGHT; y++)
{
ray.m_to = yStart;
for (int x = 0; x < CANVAS_WIDTH; x++ )
{
#if (HK_ENDIAN_BIG==1)
data[0] = 0x3f3f7fFF; // background (rgba in that byte order)
#else
data[0] = 0xFF7f3f3f; // background
#endif
output.reset();
m_numPrimaryRays++;
m_shape->castRay( ray, output );
if ( output.hasHit() )
{
hkReal brightness = .4f;
hkVector4 hitPos; hitPos.setInterpolate4( ray.m_from, ray.m_to, output.m_hitFraction );
hkVector4 lightDir; lightDir.setSub4( lightPos, hitPos );
// get the direct light info
{
hkReal lightDot = output.m_normal.dot3( lightDir );
if ( lightDot > 0.0f )
{
//
// Do shadows
//
output2.reset();
lightRay.m_to.setInterpolate4( lightRay.m_from,hitPos, 0.999f);
m_numShadowRays++;
if (!m_shape->castRay( lightRay, output2 ))
{
hkReal lightDirInvLen = lightDir.lengthInverse3();
brightness += lightDot * lightDirInvLen * lightStrength;
// add some glare
{
hkVector4 reflectedDir; reflectedDir.setAddMul4( lightDir, output.m_normal, -2.0f * lightDot );
hkVector4 rayDirection; rayDirection.setSub4( ray.m_to, ray.m_from );
hkReal dot2 = reflectedDir.dot3( rayDirection );
if ( dot2 > 0 )
{
dot2 *= lightDirInvLen;
dot2 *= dot2;
dot2 /= rayDirection.lengthSquared3();
dot2 *= dot2;
dot2 *= dot2;
dot2 *= dot2;
dot2 *= dot2;
brightness += dot2 * lightStrength * 2;
}
}
}
}
}
unsigned s = (unsigned)hkMath::hkToIntFast( brightness );
if ( s > 255 ) s = 255;
#if (HK_ENDIAN_BIG==1)
data[0] = 0x000000ff | (s<<24) | (s<<16) | (s<<8); // rgba in that byte order
#else
data[0] = 0xff000000 | (s<<16) | (s<<8) | s;
#endif
}
data++;
ray.m_to.sub4( rightOffset );
}
yStart.sub4( upOffset );
}
}
m_stopwatch.stop();
HK_TIMER_END();
}
//
// Output statistics
//
{
hkReal timePerRayuSecs = m_stopwatch.getSplitSeconds() * 1e6f / (m_numPrimaryRays + m_numShadowRays);
m_stopwatch.reset();
char buf[512];
hkString::snprintf(buf, 512, "Primary Rays:%d\nShadow Rays:%d\nAverage time per ray:%f microsecs", m_numPrimaryRays, m_numShadowRays, timePerRayuSecs);
m_env->m_textDisplay->outputText(buf, 20, 350);
}
//
// Draw the texture (really slow as we don't have a quicker reinit for the textures / direct write yet in the HKG)
//
m_env->m_window->getContext()->lock();
if (m_textureRealized)
{
m_texture->free();
}
m_texture->realize(true);
m_env->m_window->getContext()->unlock();
m_textureRealized = true;
return DEMO_OK;
}
void hkDefaultDemo::setLightAndFixedShadow(float* lightDir, float* shadowAabbMin, float* shadowAabbMax, float extraNear, float extraFar )
{
setSoleDirectionLight(m_env, lightDir, 0xffffffff );
hkgAabb aabb( shadowAabbMin, shadowAabbMax );
setupFixedShadowFrustum(m_env, *(m_env->m_displayWorld->getLightManager()->getLight(0)), aabb, extraNear, extraFar );
}
BroadphaseAddRemoveDemo::BroadphaseAddRemoveDemo(hkDemoEnvironment* env)
: hkDefaultPhysicsDemo(env),
m_rndgen(180673),
m_timer(0)
{
m_useBatch = true;
m_draw = true;
m_rate = 0.1f;
m_count = 64;
m_maxbodies = 10000;
m_removeat = 0;
//
// Create world
//
{
hkpWorldCinfo worldinfo;
worldinfo.setupSolverInfo(hkpWorldCinfo::SOLVER_TYPE_2ITERS_SOFT);
//worldinfo.m_gravity.set( 0, 0, -9.81f );
worldinfo.m_gravity.set( 0, 0, 0 );
worldinfo.m_enableDeactivation = false;
worldinfo.m_autoUpdateKdTree = false;
worldinfo.setBroadPhaseWorldSize( 200.0f );
m_world = new hkpWorld( worldinfo );
m_world->lock();
// Register ALL agents (though some may not be necessary)
hkpAgentRegisterUtil::registerAllAgents(m_world->getCollisionDispatcher());
}
//
// Create shape
//
m_shape=new hkpSphereShape(0.1f);
//
// Create the collision filter
//
{
hkpGroupFilter* filter = new hkpGroupFilter();
// disable all collisions by default
filter->disableCollisionsUsingBitfield( 0xfffffffe, 0xfffffffe );
m_world->setCollisionFilter( filter );
filter->removeReference();
}
//
// Setup the camera
//
{
hkVector4 from( 0.0f, -20.0f, 0.0f );
hkVector4 to ( 0.0f, 0.0f, 0.0f );
hkVector4 up ( 0.0f, 0.0f, 1.0f );
setupDefaultCameras( env, from, to, up );
float ldir[] = { 0, 0.5f, -1.0f };
setSoleDirectionLight(m_env, ldir, 0xffffffff );
setupGraphics();
}
m_world->unlock();
}