QUAT Storm3D_Spotlight::getOrientation() const
{
D3DXVECTOR3 lightPosition(data->properties.position.x, data->properties.position.y, data->properties.position.z);
D3DXVECTOR3 up(0, 1.f, 0);
D3DXVECTOR3 lookAt = lightPosition;
lookAt += D3DXVECTOR3(data->properties.direction.x, data->properties.direction.y, data->properties.direction.z);
D3DXMATRIX tm;
D3DXMatrixLookAtLH(&tm, &lightPosition, &lookAt, &up);
float det = D3DXMatrixDeterminant(&tm);
D3DXMatrixInverse(&tm, &det, &tm);
MAT m;
for(int j = 0; j < 4; ++j)
for(int i = 0; i < 4; ++i)
m.Set(j*4 + i, tm[j*4 + i]);
return m.GetRotation();
}
// return true if position ok and decal should be added
// false, if position NOT ok and decal should NOT be added
bool DecalPositionCalculator::calculateDecalPosition(
game::GameScene *gameScene,
const VC3 &origin, const VC3 &velocity,
DECAL_POSITIONING positioning, int positionRandom,
VC3 *resultPosition, QUAT *resultRotation)
{
assert(positioning != DecalPositionCalculator::DECAL_POSITIONING_INVALID);
game::GameMap *gameMap = gameScene->getGameMap();
bool hitWall = false;
*resultPosition = origin;
*resultRotation = QUAT((-3.1415926f / 2.0f),0,0);
// if velocity positioning...
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_VELOCITY)
{
VC3 velocityRandomized;
if (positionRandom > 0)
{
velocityRandomized = velocity * GAME_TICKS_PER_SECOND;
// TEMP
//char buf[64];
//sprintf(buf, "%f,%f,%f", velocity.x, velocity.y, velocity.z);
//Logger::getInstance()->error(buf);
// TODO: add positionRandom to velocity _angle_...
// (or maybe just do a quick hack and add it to xz-coordinates?)
velocityRandomized.x += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
velocityRandomized.z += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
// add to y too? maybe should add downward only?
// NOTE: biased downward
velocityRandomized.y += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
velocityRandomized.y -= float(positionRandom) / 100.0f * 0.5f;
} else {
velocityRandomized = velocity;
}
velocityRandomized *= 2.0f;
IStorm3D_Scene *scene = gameScene->getStormScene();
VC3 dir = velocityRandomized.GetNormalized();
VC3 rayOrigin = origin;
float rayLen = velocityRandomized.GetLength();
Storm3D_CollisionInfo sceneColl;
sceneColl.includeTerrainObjects = false;
scene->RayTrace(rayOrigin, dir, rayLen, sceneColl, true);
/*
if (sceneColl.hit)
{
VC3 hitNormal = sceneColl.plane_normal;
// make a "wall" hit if normal-y is not nearly 1
//if (fabs(hitNormal.y) < 0.8f)
{
hitWall = true;
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
}
*resultPosition = sceneColl.position;
} else {
*resultPosition += velocityRandomized;
}
*/
// New version
{
VC3 hitNormal(0, 1.f, 0);
if(sceneColl.hit)
{
hitNormal = sceneColl.plane_normal;
*resultPosition = sceneColl.position;
}
else
{
*resultPosition += velocityRandomized;
VC2 p2(resultPosition->x, resultPosition->z);
hitNormal = gameScene->getTerrain()->getFaceNormal(p2);
}
{
if(sceneColl.hit)
hitWall = true;
/*
VC3 y = dir;
VC3 z = hitNormal;
y -= hitNormal * y.GetDotWith(hitNormal);
VC3 x = z.GetCrossWith(y);
*/
VC3 x = dir;
x.y = 0.f;
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
VC3 z = hitNormal;
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, z.x);
tm.Set(9, z.y);
tm.Set(10, z.z);
resultRotation->MakeFromAngles(0.f, 0.f, -PI*0.5f);
*resultRotation = (*resultRotation) * tm.GetRotation();
/*
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
*/
}
}
// TODO: some kind of terrain raytrace maybe...?
// should collide to walls, etc.
}
// if downward positioning...
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_DOWNWARD)
{
if (positionRandom > 0)
{
// TODO: add a random xz-offset to result position
//*resultPosition += randomizedOffset;
resultPosition->x += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
resultPosition->z += float((SystemRandom::getInstance()->nextInt() % (positionRandom * 2 + 1)) - positionRandom) / 100.0f;
}
/*
// psd
{
VC2 p2(resultPosition->x, resultPosition->z);
VC3 hitNormal = gameScene->getTerrain()->getFaceNormal(p2);
VC3 x(rand() % 1000 / 999.f, 0, rand() % 1000 / 999.f);
x.Normalize();
x -= hitNormal * x.GetDotWith(hitNormal);
VC3 y = -x.GetCrossWith(hitNormal);
assert(fabsf(x.GetDotWith(y)) < 0.0001f);
assert(fabsf(x.GetDotWith(hitNormal)) < 0.0001f);
MAT tm;
tm.Set(0, x.x);
tm.Set(1, x.y);
tm.Set(2, x.z);
tm.Set(4, y.x);
tm.Set(5, y.y);
tm.Set(6, y.z);
tm.Set(8, hitNormal.x);
tm.Set(9, hitNormal.y);
tm.Set(10, hitNormal.z);
*resultRotation = tm.GetRotation();
}
*/
VC3 fooNormal;
calculateDecalRotation(gameScene, *resultPosition, *resultRotation, 0.f, fooNormal);
}
// now check that we're still inside map boundaries
if (!gameMap->isWellInScaledBoundaries(resultPosition->x, resultPosition->z))
{
// out of map.
return false;
}
// then fix decal height to ground height
if (positioning == DecalPositionCalculator::DECAL_POSITIONING_DOWNWARD
|| positioning == DecalPositionCalculator::DECAL_POSITIONING_VELOCITY)
{
if (!hitWall)
{
resultPosition->y = gameMap->getScaledHeightAt(resultPosition->x, resultPosition->z);
}
}
// check that not on top of metal grid area...
if (game::MaterialManager::isMaterialUnderPosition(gameMap,
*resultPosition, MATERIAL_METAL_GRATE))
{
// on top of grid, no decal here.
return false;
}
// TODO: check that not inside a wall, terrainobject, etc.
// if so, return false
return true;
}
